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JP2012111745A - 5-trifluoromethyl-4-nitro-2-isoxazoline compound and preparation process for the same - Google Patents

5-trifluoromethyl-4-nitro-2-isoxazoline compound and preparation process for the same Download PDF

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JP2012111745A
JP2012111745A JP2011231067A JP2011231067A JP2012111745A JP 2012111745 A JP2012111745 A JP 2012111745A JP 2011231067 A JP2011231067 A JP 2011231067A JP 2011231067 A JP2011231067 A JP 2011231067A JP 2012111745 A JP2012111745 A JP 2012111745A
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Tetsuo Shibata
哲男 柴田
Hiroyuki Kawai
洋幸 河合
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Sumitomo Chemical Co Ltd
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    • C07D261/02Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
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Abstract

【課題】直接的なトリフルオロメチル化法による、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法、および、当該化合物を提供する。
【解決手段】4−ニトロ−2−イソキサゾール化合物と、(トリフルオロメチル)トリメチルシランとを、好ましくは相間移動触媒および塩基の存在下、溶液中で反応させると共に、必要に応じて反応後に酸処理を行うことにより、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物を製造する。
【選択図】なし
A method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound by a direct trifluoromethylation method and the compound are provided.
A 4-nitro-2-isoxazole compound and (trifluoromethyl) trimethylsilane are reacted in a solution, preferably in the presence of a phase transfer catalyst and a base, and if necessary, an acid treatment after the reaction. To produce a 5-trifluoromethyl-4-nitro-2-isoxazoline compound.
[Selection figure] None

Description

本発明は、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物、および、その製造方法に関するものである。   The present invention relates to a 5-trifluoromethyl-4-nitro-2-isoxazoline compound and a method for producing the same.

近年、5−トリフルオロメチル−2−イソキサゾリン化合物は、有害生物防除剤として注目を集めている。また、5−トリフルオロメチル−2−イソキサゾリン化合物は、医薬品や電子材料等の機能性材料の製造中間体としても有用な化合物である。その有用性から、従来、非常に多くの5−トリフルオロメチル−2−イソキサゾリン化合物が合成されている。しかしながら、全ての合成法が、予めトリフルオロメチル基を有した化合物を用いて合成するビルディングブロック法であり、トリフルオロメチル基を2−イソキサゾリン化合物に直接的に導入する合成法の報告例はない。即ち、従来の報告例は、ヒドロキサム酸ハライド類とトリフルオロメチル置換オレフィンとの環化反応(特許文献1,2,3)、および、β−トリフルオロメチル−α,β−不飽和カルボニル化合物とヒドロキシルアミンとの反応(特許文献4,5,6および非特許文献1)である。よって、トリフルオロメチル基を2−イソキサゾリン化合物に直接的に導入して、5−トリフルオロメチル−2−イソキサゾリン化合物を合成する方法の開発が望まれている。   In recent years, 5-trifluoromethyl-2-isoxazoline compounds have attracted attention as pest control agents. Further, the 5-trifluoromethyl-2-isoxazoline compound is a useful compound as an intermediate for producing functional materials such as pharmaceuticals and electronic materials. Due to its usefulness, a great number of 5-trifluoromethyl-2-isoxazoline compounds have been synthesized conventionally. However, all the synthesis methods are building block methods synthesized using a compound having a trifluoromethyl group in advance, and there is no report on a synthesis method in which a trifluoromethyl group is directly introduced into a 2-isoxazoline compound. . That is, conventional reports include cyclization reaction between hydroxamic acid halides and trifluoromethyl-substituted olefins (Patent Documents 1, 2, and 3), and β-trifluoromethyl-α, β-unsaturated carbonyl compounds. Reaction with hydroxylamine (Patent Documents 4, 5, 6 and Non-Patent Document 1). Therefore, development of a method for synthesizing a 5-trifluoromethyl-2-isoxazoline compound by directly introducing a trifluoromethyl group into the 2-isoxazoline compound is desired.

また、5−トリフルオロメチル−2−イソキサゾリン化合物の4位にニトロ基が導入された5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物は、これまでに合成報告例がなく、それゆえ、新しい基本骨格として有害生物防除剤への展開や、医薬品や電子材料等の機能性材料の製造中間体として期待されている。   Further, 5-trifluoromethyl-4-nitro-2-isoxazoline compound in which a nitro group is introduced at the 4-position of the 5-trifluoromethyl-2-isoxazoline compound has not been reported so far. It is expected to be used as a new basic skeleton for the development of pesticides and as an intermediate for the production of functional materials such as pharmaceuticals and electronic materials.

国際公開WO2005/085216号公報International Publication WO2005 / 085216 国際公開WO2008/019760号公報International Publication No. WO2008 / 019760 国際公開WO2009/045999号公報International Publication WO2009 / 045999 国際公開WO2009/001942号公報International Publication WO2009 / 001942 国際公開WO2009/126668号公報International Publication WO2009 / 126668 国際公開WO2009/063910号公報International Publication WO2009 / 063910

Matoba, K.; Kawai, H.; Furukawa, T.; Kusuda, A.; Tokunaga, E.; Nakamura, S.; Shiro, M.; Shibata, N. Angew. Chem. Int. Ed., 2010, 49, 5762.Matoba, K .; Kawai, H .; Furukawa, T .; Kusuda, A .; Tokunaga, E .; Nakamura, S .; Shiro, M .; Shibata, N. Angew. Chem. Int. Ed., 2010, 49, 5762.

本発明は上記の課題に鑑みてなされたものであり、トリフルオロメチル基を2−イソキサゾリン化合物に直接的に導入する、即ち、直接的なトリフルオロメチル化法による、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法、および、新規な化合物群である5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物を提供することを主たる目的としている。   The present invention has been made in view of the above problems, and introduces a trifluoromethyl group directly into a 2-isoxazoline compound, that is, 5-trifluoromethyl-4 by a direct trifluoromethylation method. The main object is to provide a method for producing a -nitro-2-isoxazoline compound and a novel compound group, 5-trifluoromethyl-4-nitro-2-isoxazoline compound.

上記の課題を解決するために、発明者らは、トリフルオロメチル化試薬として、Ruppert試薬として知られている(トリフルオロメチル)トリメチルシラン(CFSiMe)を用い、反応基質として、電子求引基であるニトロ基を4位に有する4−ニトロ−2−イソキサゾール化合物を用いることで、トリフルオロメチルアニオンが4−ニトロ−2−イソキサゾール化合物の5位に共役付加した生成物、つまり、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物を得ることに成功した。また、発明者らは、得られた5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物に酸処理を行うことによって、一方のジアステレオマーのみを得ることができることを見出した。 In order to solve the above-described problems, the inventors used (trifluoromethyl) trimethylsilane (CF 3 SiMe 3 ), which is known as a Ruppert reagent, as a trifluoromethylation reagent, and used an electron asking as a reaction substrate. By using a 4-nitro-2-isoxazole compound having a nitro group as a pulling group at the 4-position, a product in which a trifluoromethyl anion is conjugately added to the 5-position of the 4-nitro-2-isoxazole compound, that is, 5 -Successfully obtained trifluoromethyl-4-nitro-2-isoxazoline compound. The inventors have also found that only one diastereomer can be obtained by acid treatment of the obtained 5-trifluoromethyl-4-nitro-2-isoxazoline compound.

本発明に係る5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物は、下記一般式(1)   The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to the present invention has the following general formula (1):

Figure 2012111745
Figure 2012111745

(式中、RおよびRは、互いに独立して置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基を示す。)
で表される。
(In the formula, R 1 and R 2 each independently represent a substituted or unsubstituted alkyl group, alkenyl group, alkynyl group, or aryl group.)
It is represented by

また、上記の課題を解決するために、本発明に係る5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法は、上記一般式(1)で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法であって、下記一般式(2)   In order to solve the above problems, a method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to the present invention includes a 5-trifluoromethyl- represented by the above general formula (1). A process for producing a 4-nitro-2-isoxazoline compound comprising the following general formula (2)

Figure 2012111745
Figure 2012111745

(式中、RおよびRは、一般式(1)と同じ。)
で表される4−ニトロ−2−イソキサゾール化合物と、(トリフルオロメチル)トリメチルシラン(CFSiMe)とを反応させることを特徴としている。
(In the formula, R 1 and R 2 are the same as those in the general formula (1).)
And a (trifluoromethyl) trimethylsilane (CF 3 SiMe 3 ) is reacted with the 4-nitro-2-isoxazole compound represented by the formula:

上記の製造方法によれば、電子求引基であるニトロ基を4位に有する4−ニトロ−2−イソキサゾール化合物の5位に、トリフルオロメチルアニオンを共役付加させる。つまり、トリフルオロメチル基を4−ニトロ−2−イソキサゾール化合物の5位に直接的に導入するので、直接的なトリフルオロメチル化法による、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法を提供することができる。また、新規な化合物群である5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物を提供することができる。上記5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物は、有害生物防除剤や、医薬品や電子材料等の機能性材料の製造中間体として有用である。   According to the above production method, a trifluoromethyl anion is conjugatedly added to the 5-position of a 4-nitro-2-isoxazole compound having a nitro group that is an electron-attracting group at the 4-position. That is, since the trifluoromethyl group is directly introduced into the 5-position of the 4-nitro-2-isoxazole compound, the 5-trifluoromethyl-4-nitro-2-isoxazoline compound obtained by the direct trifluoromethylation method is used. The manufacturing method of can be provided. In addition, a novel compound group, 5-trifluoromethyl-4-nitro-2-isoxazoline compound, can be provided. The 5-trifluoromethyl-4-nitro-2-isoxazoline compound is useful as an intermediate for producing pesticides and functional materials such as pharmaceuticals and electronic materials.

本発明の一実施形態について、以下に詳しく説明する。   An embodiment of the present invention will be described in detail below.

本発明において、「5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物」とは、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリンの3位および5位に、置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基を有する化合物群を指す。また、本発明において、「4−ニトロ−2−イソキサゾリン化合物」とは、4−ニトロ−2−イソキサゾリンの3位および5位に、置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基を有する化合物群を指す。   In the present invention, “5-trifluoromethyl-4-nitro-2-isoxazoline compound” means a substituted or unsubstituted alkyl at the 3-position and 5-position of 5-trifluoromethyl-4-nitro-2-isoxazoline. A group of compounds having a group, an alkenyl group, an alkynyl group, or an aryl group. In the present invention, “4-nitro-2-isoxazoline compound” means a substituted or unsubstituted alkyl group, alkenyl group, alkynyl group, aryl group at the 3-position and 5-position of 4-nitro-2-isoxazoline. Refers to a group of compounds having

本発明に係る5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物は、上記一般式(1)で表される。   The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to the present invention is represented by the above general formula (1).

5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の絶対配置は、(S,S)配置,(S,R)配置,(R,S)配置および(R,R)配置の何れであってもよい。つまり、光学異性体またはジアステレオ異性体(ジアステレオマー)等の立体異性体、並びに、立体異性体の任意の混合物、ラセミ体は、何れも本発明の範疇に包含される。   The absolute configuration of the 5-trifluoromethyl-4-nitro-2-isoxazoline compound is any of (S, S) configuration, (S, R) configuration, (R, S) configuration, and (R, R) configuration. May be. That is, stereoisomers such as optical isomers or diastereoisomers (diastereomers), and any mixtures and racemates of stereoisomers are included in the scope of the present invention.

一般式(1)中、RおよびRで示される置換若しくは未置換のアルキル基としては、互いに独立して、炭素数1ないし20程度のアルキル基が挙げられ、具体的には、例えば、メチル基,エチル基,プロピル基,ブチル基,ペンチル基,ヘキシル基,ヘプチル基,オクチル基,ノニル基,デシル基,ウンデシル基,ドデシル基,トリデシル基,テトラデシル基,ペンタデシル基,ヘキサデシル基,ヘプタデシル基,オクタデシル基,ノナデシル基,イコシル基等の直鎖状アルキル基、または、これらの環状アルキル基、分枝鎖状アルキル基等が挙げられる。 In general formula (1), examples of the substituted or unsubstituted alkyl group represented by R 1 and R 2 include, independently of each other, an alkyl group having about 1 to 20 carbon atoms. Specifically, for example, Methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl , Octadecyl group, nonadecyl group, icosyl group and the like, or these cyclic alkyl groups, branched alkyl groups and the like.

上記アルキル基は、フッ素原子,塩素原子,臭素原子,ヨウ素原子,シアノ基,ニトロ基,アリール基,アシル基,アルコキシ基,アリールオキシ基,アシルオキシ基等の置換基で水素原子が置換されていてもよい。また、置換基を二つ以上有する場合には、それら置換基は同一であってもよく、互いに異なっていてもよい。   In the above alkyl group, a hydrogen atom is substituted with a substituent such as a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a cyano group, a nitro group, an aryl group, an acyl group, an alkoxy group, an aryloxy group, or an acyloxy group. Also good. Moreover, when it has two or more substituents, these substituents may be the same or different from each other.

一般式(1)中、RおよびRで示される置換若しくは未置換のアルケニル基またはアルキニル基としては、互いに独立して、炭素数2ないし20程度のアルケニル基またはアルキニル基が挙げられる。これらアルケニル基またはアルキニル基に含まれる不飽和結合の数は、特に限定されるものではないが、好ましくは一つないし二つ程度である。該アルケニル基またはアルキニル基は、直鎖状または分枝鎖状の何れでもよい。 In the general formula (1), examples of the substituted or unsubstituted alkenyl group or alkynyl group represented by R 1 and R 2 include, independently of each other, an alkenyl group or alkynyl group having about 2 to 20 carbon atoms. The number of unsaturated bonds contained in these alkenyl groups or alkynyl groups is not particularly limited, but is preferably about one or two. The alkenyl group or alkynyl group may be linear or branched.

上記アルケニル基は、フッ素原子,塩素原子,臭素原子,ヨウ素原子,シアノ基,ニトロ基,アリール基,アシル基,アルコキシ基,アリールオキシ基,アシルオキシ基等の置換基で水素原子が置換されていてもよい。また、置換基を二つ以上有する場合には、それら置換基は同一であってもよく、互いに異なっていてもよい。   The alkenyl group has a hydrogen atom substituted with a substituent such as a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a cyano group, a nitro group, an aryl group, an acyl group, an alkoxy group, an aryloxy group, or an acyloxy group. Also good. Moreover, when it has two or more substituents, these substituents may be the same or different from each other.

また、上記アルキニル基は、フッ素原子,塩素原子,臭素原子,ヨウ素原子,シアノ基,ニトロ基,アリール基,アシル基,アルコキシ基,アリールオキシ基,アシルオキシ基等の置換基で水素原子が置換されていてもよい。また、置換基を二つ以上有する場合には、それら置換基は同一であってもよく、互いに異なっていてもよい。   In the alkynyl group, a hydrogen atom is substituted with a substituent such as a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a cyano group, a nitro group, an aryl group, an acyl group, an alkoxy group, an aryloxy group, or an acyloxy group. It may be. Moreover, when it has two or more substituents, these substituents may be the same or different from each other.

一般式(1)中、RおよびRで示される置換若しくは未置換のアリール基には、ヘテロアリール基も包含される。アリール基としては、互いに独立して、炭素数2〜30のアリール基が挙げられ、具体的には、例えば、フェニル基,ナフチル基,アンスラニル基,ピレニル基,ビフェニル基,インデニル基,テトラヒドロナフチル基,ピリジル基,ピリミジニル基,ピラジニル基,ピリダニジル基,ピペラジニル基,ピラゾリル基,イミダゾリル基,キニリル基,ピロリル基,インドリル基,フリル基等が挙げられる。 In the general formula (1), the substituted or unsubstituted aryl group represented by R 1 and R 2 includes a heteroaryl group. Examples of the aryl group include, independently of each other, an aryl group having 2 to 30 carbon atoms. Specifically, for example, a phenyl group, a naphthyl group, an anthranyl group, a pyrenyl group, a biphenyl group, an indenyl group, and a tetrahydronaphthyl group. , Pyridyl group, pyrimidinyl group, pyrazinyl group, pyridanyl group, piperazinyl group, pyrazolyl group, imidazolyl group, quinylyl group, pyrrolyl group, indolyl group, furyl group and the like.

上記アリール基は、アルキル基,フッ素原子,塩素原子,臭素原子,ヨウ素原子,シアノ基,ニトロ基,アリール基,アシル基,アルコキシ基,アリールオキシ基,アシルオキシ基等の置換基で水素原子が置換されていてもよい。また、置換基を二つ以上有する場合には、それら置換基は同一であってもよく、互いに異なっていてもよい。   The above aryl group has a hydrogen atom substituted with a substituent such as an alkyl group, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a cyano group, a nitro group, an aryl group, an acyl group, an alkoxy group, an aryloxy group, or an acyloxy group. May be. Moreover, when it has two or more substituents, these substituents may be the same or different from each other.

一般式(1)中のRとしては、メチル基、置換若しくは未置換のビニル基(アルケニル基)、置換若しくは未置換のフェニル基がより好ましい。 R 1 in the general formula (1) is more preferably a methyl group, a substituted or unsubstituted vinyl group (alkenyl group), or a substituted or unsubstituted phenyl group.

一般式(1)中のRとしては、メチル基、置換若しくは未置換のフェニル基がより好ましい。 R 2 in the general formula (1) is more preferably a methyl group or a substituted or unsubstituted phenyl group.

従って、上記一般式(1)で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物のうち、5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−5−スチリル−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−5−((E)−2−(ナフタレン−4−イル)ビニル)−4−ニトロ−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−5−((E)−2−(ナフタレン−3−イル)ビニル)−4−ニトロ−2−イソキサゾール、5−(4−メチルスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(4−メトキシスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(2−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(3−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(4−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(4−ブロモスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(4−ニトロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(2−クロロ−5−ニトロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(トリフルオロメチル)−5−((E)−2−(フラン−2−イル)ビニル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−5−スチリル−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−スチリル−3−p−トリル−2−イソキサゾール、5−(4−メチルスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−2−イソキサゾール、5−(4−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3,5−ジフェニル−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−フェニル−3−p−トリル−2−イソキサゾール、3−(4−クロロフェニル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−フェニル−2−イソキサゾール、3−(4−ブロモ−3−メチルフェニル)−5−(3,5−ジクロロフェニル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−5−メチル−4−ニトロ−3−フェニル−2−イソキサゾール、5−(トリフルオロメチル)−4,5−ジヒドロ−5−メチル−4−ニトロ−3−p−トリル−2−イソキサゾールがより好ましい。   Accordingly, among the 5-trifluoromethyl-4-nitro-2-isoxazoline compounds represented by the general formula (1), 5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro -5-styryl-2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro-3-methyl-5-((E) -2- (naphthalen-4-yl) vinyl) -4-nitro- 2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro-3-methyl-5-((E) -2- (naphthalen-3-yl) vinyl) -4-nitro-2-isoxazole, 5 -(4-Methylstyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (4-methoxystyryl) -5- (trifluoromethyl) − , 5-Dihydro-3-methyl-4-nitro-2-isoxazole, 5- (2-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2- Isoxazole, 5- (3-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (4-chlorostyryl) -5- (tri Fluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (4-bromostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4 -Nitro-2-isoxazole, 5- (4-nitrostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (2-chloro -5-nitrostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (trifluoromethyl) -5-((E) -2- (Furan-2-yl) vinyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro-4-nitro-3-phenyl- 5-styryl-2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro-4-nitro-5-styryl-3-p-tolyl-2-isoxazole, 5- (4-methylstyryl) -5 -(Trifluoromethyl) -4,5-dihydro-4-nitro-3-phenyl-2-isoxazole, 5- (4-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-4- D Toro-3-phenyl-2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro-4-nitro-3,5-diphenyl-2-isoxazole, 5- (trifluoromethyl) -4,5- Dihydro-4-nitro-5-phenyl-3-p-tolyl-2-isoxazole, 3- (4-chlorophenyl) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-5-phenyl- 2-isoxazole, 3- (4-bromo-3-methylphenyl) -5- (3,5-dichlorophenyl) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-2-isoxazole, 5 -(Trifluoromethyl) -4,5-dihydro-5-methyl-4-nitro-3-phenyl-2-isoxazole, 5- (trifluoromethyl) -4,5-dihydro 5-methyl-4-nitro -3-p-tolyl-2-isoxazole is more preferable.

本発明に係る5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法は、上記一般式(1)で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法であって、上記一般式(2)で表される4−ニトロ−2−イソキサゾール化合物と、(トリフルオロメチル)トリメチルシラン(CFSiMe)とを反応させる方法である。上記反応は、相間移動触媒および塩基の存在下、溶液中で行われることがより好ましい。 The method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to the present invention is a method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound represented by the general formula (1). In this method, the 4-nitro-2-isoxazole compound represented by the general formula (2) is reacted with (trifluoromethyl) trimethylsilane (CF 3 SiMe 3 ). The reaction is more preferably carried out in solution in the presence of a phase transfer catalyst and a base.

一般式(2)中、RおよびRで示される置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基は、一般式(1)中のRおよびRと同じであるので、その説明を省略する。 In the general formula (2), a substituted or unsubstituted alkyl group represented by R 1 and R 2, alkenyl group, alkynyl group, aryl group are the same as R 1 and R 2 in the general formula (1) The description is omitted.

4−ニトロ−2−イソキサゾール化合物1モルに対する(トリフルオロメチル)トリメチルシランの量は、0を超え、1モル以下であればよいが、副生成物が生じることを抑制するために、0.2モル程度にすることがより好ましい。   The amount of (trifluoromethyl) trimethylsilane relative to 1 mol of 4-nitro-2-isoxazole compound may be more than 0 and 1 mol or less, but in order to suppress the formation of by-products, 0.2% More preferably, it is about a mole.

反応に用いる溶媒は、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物、4−ニトロ−2−イソキサゾール化合物、および、(トリフルオロメチル)トリメチルシランが溶解する溶媒であればよく、特に限定されるものではないが、具体的には、例えば、ジエチルエーテル,ジイソプロピルエーテル,n−ブチルメチルエーテル,tert−ブチルメチルエーテル,テトラヒドロフラン,ジオキサン等のエーテル系溶媒;ヘキサン,ヘプタン,シクロペンタン,シクロヘキサン等の炭化水素系溶媒;クロロホルム,四塩化炭素,塩化メチレン,ジクロロエタン,トリクロロエタン等のハロゲン化炭化水素系溶媒;ベンゼン,トルエン,キシレン,クメン,シメン,メシチレン,ジイソプロピルベンゼン,ピリジン,ピリミジン,ピラジン,ピリダジン等の芳香族系溶媒;メタノール,エタノール,プロパノール,iso−プロピルアルコール,アミノエタノール,N,N−ジメチルアミノエタノール等のアルコール系溶媒;ジメチルスルホキシド,ジメチルホルムアミド;等が挙げられる。上記例示の溶媒のうち、ジメチルホルムアミドが最も好ましい。これら溶媒は単独で用いてもよく、二種類以上を適宜混合して用いることも可能である。   The solvent used in the reaction is not particularly limited as long as it is a solvent in which 5-trifluoromethyl-4-nitro-2-isoxazoline compound, 4-nitro-2-isoxazole compound, and (trifluoromethyl) trimethylsilane are dissolved. Specifically, for example, ether solvents such as diethyl ether, diisopropyl ether, n-butyl methyl ether, tert-butyl methyl ether, tetrahydrofuran and dioxane; hexane, heptane, cyclopentane, cyclohexane and the like Hydrocarbon solvents: Chloroform, carbon tetrachloride, methylene chloride, dichloroethane, trichloroethane and other halogenated hydrocarbon solvents; benzene, toluene, xylene, cumene, cymene, mesitylene, diisopropylbenzene, pyridine, pyrimidine, pi Aromatic solvents such as azine and pyridazine; alcohol solvents such as methanol, ethanol, propanol, iso-propyl alcohol, aminoethanol, N, N-dimethylaminoethanol; dimethyl sulfoxide, dimethylformamide, and the like. Of the solvents exemplified above, dimethylformamide is most preferred. These solvents may be used alone, or two or more kinds may be appropriately mixed and used.

溶液中の4−ニトロ−2−イソキサゾール化合物の濃度は、より高い方が効率的であるので好ましいものの、特に限定されるものではない。   The concentration of the 4-nitro-2-isoxazole compound in the solution is not particularly limited, although higher concentration is preferable because it is more efficient.

反応に用いる相間移動触媒は、特に限定されるものではないが、具体的には、例えば、長鎖アルキルアンモニウムカチオンを生じる塩、即ち、テトラエチルアンモニウム塩,テトラプロピルアンモニウム塩,テトラブチルアンモニウム塩、トリオクチルメチルアンモニウム塩、ベンジルトリメチルアンモニウム塩,ベンジルトリエチルアンモニウム塩,ベンジルジメチルオクタデシルアンモニウム塩,ベンジルトリブチルアンモニウム塩,デシルトリメチルアンモニウム塩,セチルトリメチルアンモニウム塩,セチルトリエチルアンモニウム塩等が挙げられる。対アニオンを生じる原子としてはフッ素原子,塩素原子,臭素原子,ヨウ素原子等が挙げられる。上記例示の塩のうち、セチルトリメチルアンモニウム塩,セチルトリエチルアンモニウム塩が最も好ましく、相間移動触媒のうち、セチルトリメチルアンモニウムブロミドが最も好ましい。   The phase transfer catalyst used in the reaction is not particularly limited. Specifically, for example, a salt that generates a long-chain alkylammonium cation, that is, tetraethylammonium salt, tetrapropylammonium salt, tetrabutylammonium salt, Examples include octylmethylammonium salt, benzyltrimethylammonium salt, benzyltriethylammonium salt, benzyldimethyloctadecylammonium salt, benzyltributylammonium salt, decyltrimethylammonium salt, cetyltrimethylammonium salt, cetyltriethylammonium salt and the like. Examples of atoms that generate a counter anion include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. Of the above-exemplified salts, cetyltrimethylammonium salt and cetyltriethylammonium salt are most preferred, and among phase transfer catalysts, cetyltrimethylammonium bromide is most preferred.

4−ニトロ−2−イソキサゾール化合物に対する相間移動触媒の量は、0を超え、1当量以下であればよい。   The amount of the phase transfer catalyst relative to the 4-nitro-2-isoxazole compound may be more than 0 and 1 equivalent or less.

反応に用いる塩基は、無機塩基,有機塩基,有機金属試薬等が挙げられ、具体的には、例えば、炭酸カリウム,炭酸セシウム等の炭酸塩;酢酸ナトリウム,酢酸カリウム等の酢酸塩;テトラメチルアンモニウムフロリド,テトラエチルアンモニウムフロリド,テトラブチルアンモニウムフロリド等のアンモニウムフロリド;フッ化カリウム,フッ化セシウム等のフッ化アルカリ金属類;水酸化ナトリウム,水酸化カリウム等の水酸化物;ナトリウムメトキシド,カリウムtert−ブトキシド等のアルコキシド化合物;DABCO(1,4−ジアザビシクロ[2.2.2]オクタン),DBU(ジアザビシクロウンデセン),トリエチルアミン,N,N−ジメチルアミノピリジン等の有機塩基;n−ブチルリチウム,sec−ブチルリチウム,tert−ブチルリチウム,リチウムジイソプロピルアミド,ヘキサメチルジシラザンリチウム塩等のリチウム塩;等が挙げられる。上記例示の塩基のうち、酢酸ナトリウムが最も好ましい。   Examples of the base used in the reaction include inorganic bases, organic bases, organometallic reagents, and the like. Specific examples include carbonates such as potassium carbonate and cesium carbonate; acetates such as sodium acetate and potassium acetate; tetramethylammonium. Ammonium fluoride such as fluoride, tetraethylammonium fluoride, tetrabutylammonium fluoride; alkali metal fluorides such as potassium fluoride and cesium fluoride; hydroxide such as sodium hydroxide and potassium hydroxide; sodium methoxide Alkoxide compounds such as potassium tert-butoxide; organic bases such as DABCO (1,4-diazabicyclo [2.2.2] octane), DBU (diazabicycloundecene), triethylamine, N, N-dimethylaminopyridine; n-butyllithium, sec-butyllithium, tert-butyl Butyllithium, lithium diisopropylamide, lithium salts such as hexamethyldisilazane lithium salt; and the like. Of the above exemplified bases, sodium acetate is most preferred.

4−ニトロ−2−イソキサゾール化合物に対する塩基の量は、1〜10当量であればよく、好ましくは1.5当量である。   The amount of the base relative to the 4-nitro-2-isoxazole compound may be 1 to 10 equivalents, and preferably 1.5 equivalents.

反応器は、特に限定されるものではなく、大気開放型の反応器;オートクレーブ等の密閉型の反応器;の何れであっても使用可能である。   The reactor is not particularly limited, and any of a reactor open to the atmosphere and a sealed reactor such as an autoclave can be used.

溶媒に添加する4−ニトロ−2−イソキサゾール化合物、(トリフルオロメチル)トリメチルシラン、相間移動触媒、および、塩基の順序(タイミング)は、特に限定されるものではないが、副生成物が生じることを抑制するために、4−ニトロ−2−イソキサゾール化合物、相間移動触媒、および、塩基を含む溶液に、(トリフルオロメチル)トリメチルシランを添加することがより好ましい。   The order (timing) of 4-nitro-2-isoxazole compound, (trifluoromethyl) trimethylsilane, phase transfer catalyst, and base to be added to the solvent is not particularly limited, but by-products are generated. In order to suppress this, it is more preferable to add (trifluoromethyl) trimethylsilane to a solution containing a 4-nitro-2-isoxazole compound, a phase transfer catalyst, and a base.

反応温度は、特に限定されるものではないが、通常、−80℃ないし120℃であり、より好ましくは室温(25℃)付近である。反応圧力は、大気圧下,加圧下の何れであってもよい。反応時間は、特に限定されるものではないが、通常、3〜9時間で反応が完結する。   The reaction temperature is not particularly limited, but is usually −80 ° C. to 120 ° C., more preferably around room temperature (25 ° C.). The reaction pressure may be either atmospheric pressure or pressurized. The reaction time is not particularly limited, but the reaction is usually completed in 3 to 9 hours.

上記反応によって、つまり、反応基質として4−ニトロ−2−イソキサゾール化合物を用い、電子求引基であるニトロ基を4位に有する当該4−ニトロ−2−イソキサゾール化合物の5位に、トリフルオロメチル化試薬であるトリフルオロメチルアニオンを共役付加させることによって、新規な化合物群である5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物が得られる。   By the above reaction, that is, using 4-nitro-2-isoxazole compound as a reaction substrate and having a nitro group that is an electron-attracting group at the 4-position, the 4-nitro-2-isoxazole compound is placed at the 5-position with trifluoromethyl. By conjugated addition of a trifluoromethyl anion that is a fluorinating reagent, a novel compound group, 5-trifluoromethyl-4-nitro-2-isoxazoline compound, is obtained.

必要に応じて酸処理を行った後の反応液から5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物を単離および精製する方法は、特に限定されるものではなく、一般的な手法を採用することができる。具体的には、例えば、反応液を濃縮した後、シリカゲル,アルミナ,ゼオライト等の吸着剤を用いたカラムクロマトグラフ法での精製、塩析、再結晶等が挙げられる。   The method for isolating and purifying the 5-trifluoromethyl-4-nitro-2-isoxazoline compound from the reaction solution after acid treatment as necessary is not particularly limited, and a general method is used. Can be adopted. Specifically, for example, after concentrating the reaction solution, purification by column chromatography using an adsorbent such as silica gel, alumina, zeolite, salting out, recrystallization and the like can be mentioned.

以下、実施例によって本発明をさらに具体的に説明するが、本発明の範囲は下記実施例の範囲に限定されるものではない。   EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the scope of the present invention is not limited to the scope of the following examples.

〔実施例1〕
上記一般式(1)で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物としての下記化合物1a〜1vを、以下の製造方法でそれぞれ製造した。
[Example 1]
The following compounds 1a to 1v as 5-trifluoromethyl-4-nitro-2-isoxazoline compounds represented by the above general formula (1) were respectively produced by the following production methods.

即ち、上記一般式(2)で表される4−ニトロ−2−イソキサゾール化合物(0.20mmol)、相間移動触媒としてのセチルトリメチルアンモニウムブロミド(21.9mg,0.06mmol)、および、塩基としての酢酸ナトリウム(24.6mg,0.30mmol)を、溶媒であるジメチルホルムアミド1mLに溶解した。得られた溶液に、室温で、(トリフルオロメチル)トリメチルシラン(59.1μL,0.04mmol)を加えた。その後、反応液を室温で3〜9時間撹拌することにより、4−ニトロ−2−イソキサゾール化合物と(トリフルオロメチル)トリメチルシランとを反応させた。   That is, the 4-nitro-2-isoxazole compound (0.20 mmol) represented by the general formula (2), cetyltrimethylammonium bromide (21.9 mg, 0.06 mmol) as a phase transfer catalyst, and Sodium acetate (24.6 mg, 0.30 mmol) was dissolved in 1 mL of dimethylformamide as a solvent. To the resulting solution was added (trifluoromethyl) trimethylsilane (59.1 μL, 0.04 mmol) at room temperature. Then, the 4-nitro-2-isoxazole compound and (trifluoromethyl) trimethylsilane were reacted by stirring the reaction solution at room temperature for 3 to 9 hours.

反応後、1Mの塩酸1mLを反応液に加えて、室温でさらに1時間撹拌して酸処理を行った。   After the reaction, 1 mL of 1M hydrochloric acid was added to the reaction solution, and the mixture was further stirred at room temperature for 1 hour for acid treatment.

続いて、酢酸エチルを反応液に加えて抽出操作を行い、集めた有機相を飽和食塩水で洗浄した後、無水硫酸ナトリウムで乾燥させた。乾燥後、減圧下で溶媒を留去し、シリカゲルを用いたカラムクロマトグラフ法にて精製し、5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物としての下記化合物1a〜1vを結晶状態で得た。   Subsequently, extraction was performed by adding ethyl acetate to the reaction solution, and the collected organic phase was washed with saturated brine, and then dried over anhydrous sodium sulfate. After drying, the solvent was distilled off under reduced pressure, and the residue was purified by column chromatography using silica gel, and the following compounds 1a to 1v as 5-trifluoromethyl-4-nitro-2-isoxazoline compounds were crystallized. Obtained.

以下に、化合物1a〜1vの構造式および各種分析結果を示す。   The structural formulas and various analysis results of compounds 1a to 1v are shown below.

Figure 2012111745
Figure 2012111745

化合物1a:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−5−スチリル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.18 (s, 3H), 5.88 (s, 1H), 6.09 (d, J = 16.2 Hz), 7.11 (d, J = 15.9 Hz), 7.33-7.37 (m, 5H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.7 (q, J = 30.7 Hz), 95.9, 112.5, 122.9 (q, J = 286.7 Hz), 127.3, 128.8, 129.5, 134.3, 138.7, 149.5; 19F NMR (CDCl, 188 MHz) δ -80.9 (s, 3F); IR (KBr) 3058, 3002, 1655, 1562, 1496, 1436, 1395, 1366, 1330, 1263, 1227, 1190, 1144, 1094, 975, 908, 879, 839, 752, 693 cm−1; mp = 111.5-114.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 300 (M-), HRMS (ESI) calcd. for C13H10FNO [M-H]-: 299.0641 Found: 299.0644; 87%収率
Compound 1a: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-5-styryl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.18 (s, 3H), 5.88 (s, 1H), 6.09 (d, J = 16.2 Hz), 7.11 (d, J = 15.9 Hz), 7.33-7.37 (m , 5H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.7 (q, J = 30.7 Hz), 95.9, 112.5, 122.9 (q, J = 286.7 Hz), 127.3, 128.8, 129.5, 134.3, 138.7 19 F NMR (CDCl 3 , 188 MHz) δ-80.9 (s, 3F); IR (KBr) 3058, 3002, 1655, 1562, 1496, 1436, 1395, 1366, 1330, 1263, 1227, 1190, 1144, 1094, 975, 908, 879, 839, 752, 693 cm −1 ; mp = 111.5-114.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 300 (M ), HRMS ( ESI) calcd. For C 13 H 10 F 3 N 2 O 3 [MH] : 299.0641 Found: 299.0644; 87% yield

Figure 2012111745
Figure 2012111745

化合物1b:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−5−((E)−2−(ナフタレン−4−イル)ビニル)−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.21 (s, 3H), 5.93 (s, 1H), 6.15 (d, J = 15.3 Hz, 1H), 7.41-7.58 (m, 4H), 7.83-7.91 (m, 3H), 7.98-8.01 (m, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.7, 88.8 (q, J = 30.7 Hz), 96.0, 115.9, 122.9 (q, J = 286.2 Hz), 123.5, 124.7, 125.4, 126.2, 126.7, 128.5, 129.7, 131.0, 132.3, 133.4, 136.4, 149.6; 19F NMR (CDCl, 188 MHz) δ -80.8 (s, 3F); IR (KBr) 3063, 3019, 2929, 1814, 1648, 1573, 1435, 1370, 1329, 1272, 1195, 1134, 1005, 978, 885, 778, 722, 665, 638, 585, 549, 488 cm−1; mp = 75.0-76.5 ℃ (CHCl/Hexane); MS (ESI, m/z) 350 (M-), HRMS (ESI) calcd. for C17H12FNO [M-H]-: 349.0798 Found: 349.0800; 81%収率
Compound 1b: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-5-((E) -2- (naphthalen-4-yl) vinyl ) -4-Nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.21 (s, 3H), 5.93 (s, 1H), 6.15 (d, J = 15.3 Hz, 1H), 7.41-7.58 (m, 4H), 7.83-7.91 ( m, 3H), 7.98-8.01 (m, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.7, 88.8 (q, J = 30.7 Hz), 96.0, 115.9, 122.9 (q, J = 286.2 Hz) , 123.5, 124.7, 125.4, 126.2, 126.7, 128.5, 129.7, 131.0, 132.3, 133.4, 136.4, 149.6; 19 F NMR (CDCl 3 , 188 MHz) δ -80.8 (s, 3F); IR (KBr) 3063, 3019, 2929, 1814, 1648, 1573, 1435, 1370, 1329, 1272, 1195, 1134, 1005, 978, 885, 778, 722, 665, 638, 585, 549, 488 cm -1 ; mp = 75.0-76.5 C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 350 (M ), HRMS (ESI) calcd. For C 17 H 12 F 3 N 2 O 3 [MH] : 349.0798 Found: 349.0800 81% yield

Figure 2012111745
Figure 2012111745

化合物1c:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−5−((E)−2−(ナフタレン−3−イル)ビニル)−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.18 (s, 3H), 5.91 (s, 1H), 6.20 (d, J = 15.9 Hz, 1H), 7.27 (d, J = 15.9 Hz, 1H), 7.47-7.53 (m, 3H), 7.78-7.83 (m, 4H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.8 (q, J = 29.2 Hz), 95.9, 112.6, 122.9 (q, J = 286.7 Hz), 123.2, 126.6, 126.9, 127.7, 128.3, 128.52, 128.55, 131.7, 133.2, 133.8, 138.8, 149.6; 19F NMR (CDCl, 188 MHz) δ -80.8 (s, 3F); IR (KBr) 3061, 2994, 2925, 1925, 1650, 1564, 1438, 1275, 1180, 1005, 976, 897, 861, 809, 768, 747, 718, 664, 471 cm−1; mp = 77.0-79.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 350 (M-), HRMS (ESI) calcd. for C17H12FNO [M-H]-: 349.0805 Found: 349.0800; 85%収率
Compound 1c: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-5-((E) -2- (naphthalen-3-yl) vinyl ) -4-Nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.18 (s, 3H), 5.91 (s, 1H), 6.20 (d, J = 15.9 Hz, 1H), 7.27 (d, J = 15.9 Hz, 1H), 7.47 -7.53 (m, 3H), 7.78-7.83 (m, 4H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.8 (q, J = 29.2 Hz), 95.9, 112.6, 122.9 (q, J = 286.7 Hz), 123.2, 126.6, 126.9, 127.7, 128.3, 128.52, 128.55, 131.7, 133.2, 133.8, 138.8, 149.6; 19 F NMR (CDCl 3 , 188 MHz) δ-80.8 (s, 3F); IR (KBr ) 3061, 2994, 2925, 1925, 1650, 1564, 1438, 1275, 1180, 1005, 976, 897, 861, 809, 768, 747, 718, 664, 471 cm -1 ; mp = 77.0-79.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 350 (M ), HRMS (ESI) calcd. For C 17 H 12 F 3 N 2 O 3 [MH] : 349.0805 Found: 349.0800; 85% yield

Figure 2012111745
Figure 2012111745

化合物1d:(4S,5S)and (4R,5R)−5−(4−メチルスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.17 (s, 3H), 2.35 (s, 3H), 5.87 (s, 1H), 6.03 (d, J = 15.9 Hz, 1H), 7.07 (d, J = 15.9 Hz, 1H), 7.15 (d, J = 7.8 Hz, 1H), 7.27 (d, J = 8.7 Hz, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.7, 21.2, 88.8 (q, J = 30.7 Hz), 95.8, 111.3, 122.9 (q, J = 286.2 Hz), 127.2, 129.4, 131.5, 138.5, 139.7, 149.6; 19F NMR (CDCl, 188 MHz) δ -80.9 (s, 3F); IR (KBr) 2999, 2926, 1901, 1656, 1566, 1517, 1434, 1366, 1328, 1263, 1184, 1144, 1093, 1043, 981, 910, 882, 798, 910, 882, 798, 768, 719, 664 cm−1; mp = 81.0-83.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 314 (M-), HRMS (ESI) calcd. for C14H12FNO [M-H]-: 313.0800 Found: 313.0798; 84%収率
Compound 1d: (4S, 5S) and (4R, 5R) -5- (4-methylstyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.17 (s, 3H), 2.35 (s, 3H), 5.87 (s, 1H), 6.03 (d, J = 15.9 Hz, 1H), 7.07 (d, J = 15.9 Hz, 1H), 7.15 (d, J = 7.8 Hz, 1H), 7.27 (d, J = 8.7 Hz, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.7, 21.2, 88.8 (q, J = 30.7 Hz), 95.8, 111.3, 122.9 (q, J = 286.2 Hz), 127.2, 129.4, 131.5, 138.5, 139.7, 149.6; 19 F NMR (CDCl 3 , 188 MHz) δ-80.9 (s, 3F); IR (KBr) 2999, 2926, 1901, 1656, 1566, 1517, 1434, 1366, 1328, 1263, 1184, 1144, 1093, 1043, 981, 910, 882, 798, 910, 882, 798, 768, 719, 664 cm −1 ; mp = 81.0-83.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 314 (M ), HRMS (ESI) calcd. For C 14 H 12 F 3 N 2 O 3 [MH] - : 313.0800 Found: 313.0798; 84% yield

Figure 2012111745
Figure 2012111745

化合物1e:(4S,5S)and (4R,5R)−5−(4−メトキシスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.16 (s, 3H), 3.80 (s, 3H), 5.87 (s, 1H), 5.94 (d, J = 15.6 Hz, 1H), 6.86 (d, J = 8.7 Hz, 1H), 7.03 (d, J = 15.6 Hz, 1H), 7.32 (d, J = 8.7 Hz, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 55.3, 88.9 (q, J = 30.2 Hz), 95.9, 109.8, 114.2, 122.9 (q, J = 286.2 Hz), 127.1, 128.8, 138.0, 149.5, 160.7; 19F NMR (CDCl, 188 MHz) δ -81.0 (s, 3F); IR (KBr) 3000, 2838, 1655, 1609, 1563, 1515, 1435, 1266, 1185, 1092, 1037, 978, 909, 849, 805, 769, 723, 664, 522, 484 cm−1; mp = 76.0-79.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 330 (M-), HRMS (ESI) calcd. for C14H12FNO [M-H]-: 329.0749 Found: 329.0746; 82%収率
Compound 1e: (4S, 5S) and (4R, 5R) -5- (4-methoxystyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.16 (s, 3H), 3.80 (s, 3H), 5.87 (s, 1H), 5.94 (d, J = 15.6 Hz, 1H), 6.86 (d, J = 8.7 Hz, 1H), 7.03 (d, J = 15.6 Hz, 1H), 7.32 (d, J = 8.7 Hz, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 55.3, 88.9 (q, J = 30.2 Hz), 95.9, 109.8, 114.2, 122.9 (q, J = 286.2 Hz), 127.1, 128.8, 138.0, 149.5, 160.7; 19 F NMR (CDCl 3 , 188 MHz) δ-81.0 (s, 3F); IR (KBr) 3000, 2838, 1655, 1609, 1563, 1515, 1435, 1266, 1185, 1092, 1037, 978, 909, 849, 805, 769, 723, 664, 522, 484 cm -1 ; mp = 76.0 -79.0 ℃ (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 330 (M -), HRMS (ESI) calcd for C 14 H 12 F 3 N 2 O 4 [MH] -:. 329.0749 Found : 329.0746; 82% yield

Figure 2012111745
Figure 2012111745

化合物1f:(4S,5S)and (4R,5R)−5−(2−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.19 (s, 3H), 5.90 (s, 1H), 6.09 (d, J = 15.9 Hz, 1H), 7.22-7.30 (m, 2H), 7.36-7.42 (m, 2H), 7.49 (d, J = 15.9 Hz, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.7, 88.5 (q, J = 30.7 Hz), 95.9, 115.7, 122.8 (q, J = 286.2 Hz), 127.0, 127.5, 129.9, 130.4, 132.8, 134.0, 135.3, 149.5; 19F NMR (CDCl, 188 MHz) δ -80.7 (s, 3F); IR (KBr) 3002, 1562, 1473, 1444, 1392, 1365, 1332, 1277, 1182, 1146, 1092, 1054, 973, 910, 881, 757, 709, 663 cm−1; mp = 74.0-76.5 ℃ (CHCl/Hexane); MS (ESI, m/z) 334 (M-), HRMS (ESI) calcd. for C13HClFNO [M-H]-: 333.0258 Found: 333.0254; 88%収率
Compound 1f: (4S, 5S) and (4R, 5R) -5- (2-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.19 (s, 3H), 5.90 (s, 1H), 6.09 (d, J = 15.9 Hz, 1H), 7.22-7.30 (m, 2H), 7.36-7.42 ( m, 2H), 7.49 (d, J = 15.9 Hz, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.7, 88.5 (q, J = 30.7 Hz), 95.9, 115.7, 122.8 (q, J = 286.2 Hz), 127.0, 127.5, 129.9, 130.4, 132.8, 134.0, 135.3, 149.5; 19 F NMR (CDCl 3 , 188 MHz) δ -80.7 (s, 3F); IR (KBr) 3002, 1562, 1473, 1444 , 1392, 1365, 1332, 1277, 1182, 1146, 1092, 1054, 973, 910, 881, 757, 709, 663 cm −1 ; mp = 74.0-76.5 ° C. (CH 2 Cl 2 / Hexane); MS (ESI , m / z) 334 (M ), HRMS (ESI) calcd. for C 13 H 9 ClF 3 N 2 O 3 [MH] : 333.0258 Found: 333.0254; 88% yield

Figure 2012111745
Figure 2012111745

化合物1g:(4S,5S)and (4R,5R)−5−(3−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.18 (s, 3H), 5.89 (s, 1H), 6.11 (d, J = 15.6 Hz, 1H), 7.06 (d, J = 15.9 Hz, 1H), 7.24-7.30 (m, 3H), 7.37 (s, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.5 (q, J = 30.7 Hz), 95.8, 114.1, 122.8 (q, J = 286.2 Hz), 125.6, 127.1, 129.5, 130.0, 134.8, 136.0, 137.4, 149.6; 19F NMR (CDCl, 188 MHz) δ -80.8 (s, 3F); IR (KBr) 2998, 1658, 1565, 1475, 1433, 1394, 1366, 1330, 1272, 1188, 1144, 1095, 974, 908, 877, 782, 703, 680, 632, 566, 500, 439 cm−1; mp = 91.0-93.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 334 (M-), HRMS (ESI) calcd. for C13HClFNO (M-): 333.0254 Found: 333.0251; 90%収率
Compound 1g: (4S, 5S) and (4R, 5R) -5- (3-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.18 (s, 3H), 5.89 (s, 1H), 6.11 (d, J = 15.6 Hz, 1H), 7.06 (d, J = 15.9 Hz, 1H), 7.24 -7.30 (m, 3H), 7.37 (s, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.5 (q, J = 30.7 Hz), 95.8, 114.1, 122.8 (q, J = 286.2 Hz ), 125.6, 127.1, 129.5, 130.0, 134.8, 136.0, 137.4, 149.6; 19 F NMR (CDCl 3 , 188 MHz) δ -80.8 (s, 3F); IR (KBr) 2998, 1658, 1565, 1475, 1433 , 1394, 1366, 1330, 1272, 1188, 1144, 1095, 974, 908, 877, 782, 703, 680, 632, 566, 500, 439 cm −1 ; mp = 91.0-93.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 334 (M ), HRMS (ESI) calcd. For C 13 H 9 ClF 3 N 2 O 3 (M ): 333.0254 Found: 333.0251; 90% yield

Figure 2012111745
Figure 2012111745

化合物1h:(4S,5S)and (4R,5R)−5−(4−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.18 (s, 1H), 5.88 (s, 1H), 6.07 (d, J = 15.6 Hz, 1H), 7.07 (d, J = 15.9 Hz, 1H), 7.31 (s, 5H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.6 (q, J = 30.7 Hz), 95.9, 113.2, 122.8 (q, J = 286.7 Hz), 128.6, 129.0, 132.8, 135.5, 137.5, 149.5; 19F NMR (CDCl, 188 MHz) δ -80.1 (s, 3F); IR (KBr) 2999, 1905, 1769, 1655, 1594, 1493, 1435, 1193, 1093, 1013, 979, 923, 851, 807, 720, 703, 626, 591, 507, 451 cm−1; mp = 120.0-123.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 334 (M-), HRMS (ESI) calcd. for C13HClFNO [M-H]-: 333.0254 Found: 333.0255; 96%収率
Compound 1h: (4S, 5S) and (4R, 5R) -5- (4-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.18 (s, 1H), 5.88 (s, 1H), 6.07 (d, J = 15.6 Hz, 1H), 7.07 (d, J = 15.9 Hz, 1H), 7.31 (s, 5H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.6 (q, J = 30.7 Hz), 95.9, 113.2, 122.8 (q, J = 286.7 Hz), 128.6, 129.0, 132.8, 135.5 , 137.5, 149.5; 19 F NMR (CDCl 3 , 188 MHz) δ-80.1 (s, 3F); IR (KBr) 2999, 1905, 1769, 1655, 1594, 1493, 1435, 1193, 1093, 1013, 979, 923, 851, 807, 720, 703, 626, 591, 507, 451 cm −1 ; mp = 120.0-123.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 334 (M ), HRMS (ESI) calcd for C 13 H 9 ClF 3 N 2 O 3 [MH] -: 333.0254 Found:. 333.0255; 96% yield

Figure 2012111745
Figure 2012111745

化合物1i:(4S,5S)and (4R,5R)−5−(4−ブロモスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.18 (s, 3H), 5.88 (s, 1H), 6.08 (d, J = 15.9 Hz, 1H), 7.05 (d, J = 15.9 Hz, 1H), 7.24 (d, J = 8.4 Hz, 2H), 7.47 (d, J = 8.4 Hz, 2H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.6 (q, J = 31.2 Hz), 95.9, 113.3, 122.8 (q, J = 286.2 Hz), 123.7, 128.8, 132.0, 133.2, 137.6, 149.5; 19F NMR (CDCl, 188 MHz) δ -80.8 (s, 3F); IR (KBr) 2997, 1901, 1655, 1566, 1489, 1434, 1403, 1367, 1326, 1261, 1188, 1143, 1073, 1010, 978, 910, 884, 842, 803, 767, 718, 692 cm−1; mp = 124.0-126.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 378 (M-), HRMS (ESI) calcd. for C13HBrFNO [M-H]-: 376.9749 Found: 376.9756; 88%収率
Compound 1i: (4S, 5S) and (4R, 5R) -5- (4-bromostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.18 (s, 3H), 5.88 (s, 1H), 6.08 (d, J = 15.9 Hz, 1H), 7.05 (d, J = 15.9 Hz, 1H), 7.24 (d, J = 8.4 Hz, 2H), 7.47 (d, J = 8.4 Hz, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.6 (q, J = 31.2 Hz), 95.9, 113.3, 122.8 (q, J = 286.2 Hz), 123.7, 128.8, 132.0, 133.2, 137.6, 149.5; 19 F NMR (CDCl 3 , 188 MHz) δ -80.8 (s, 3F); IR (KBr) 2997, 1901, 1655 , 1566, 1489, 1434, 1403, 1367, 1326, 1261, 1188, 1143, 1073, 1010, 978, 910, 884, 842, 803, 767, 718, 692 cm -1 ; mp = 124.0-126.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 378 (M -), HRMS (ESI) calcd for C 13 H 9 BrF 3 N 2 O 3 [MH] -: 376.9749 Found:. 376.9756; 88% yield

Figure 2012111745
Figure 2012111745

化合物1j:(4S,5S)and (4R,5R)−5−(4−ニトロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.21 (s, 3H), 5.93 (s, 1H), 6.26 (d, J = 15.9 Hz, 1H), 7.19 (d, J = 15.9 Hz, 1H), 7.54 (d, J = 8.7 Hz, 2H), 8.22 (d, J = 9.0 Hz, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.3 (q, J = 30.7 Hz), 95.9, 117.3, 122.6 (q, J = 286.2 Hz), 124.1, 128.1, 136.6, 140.3, 148.2, 149.7; 19F NMR (CDCl, 188 MHz) δ -80.6 (s, 3F); IR (KBr) 3082, 3000, 1928, 1601, 1561, 1521, 1435, 1353, 1265, 1188, 1143, 1095, 1043, 1015, 978, 913, 886, 859, 821, 749, 694, 618 cm−1; mp = 121.0-124.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 345 (M-), HRMS (ESI) calcd. for C13HBrFNO [M-H]-: 344.0498 Found: 344.0494; 84%収率
Compound 1j: (4S, 5S) and (4R, 5R) -5- (4-nitrostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.21 (s, 3H), 5.93 (s, 1H), 6.26 (d, J = 15.9 Hz, 1H), 7.19 (d, J = 15.9 Hz, 1H), 7.54 (d, J = 8.7 Hz, 2H), 8.22 (d, J = 9.0 Hz, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.3 (q, J = 30.7 Hz), 95.9, 117.3, 122.6 (q, J = 286.2 Hz), 124.1, 128.1, 136.6, 140.3, 148.2, 149.7; 19 F NMR (CDCl 3 , 188 MHz) δ -80.6 (s, 3F); IR (KBr) 3082, 3000, 1928 , 1601, 1561, 1521, 1435, 1353, 1265, 1188, 1143, 1095, 1043, 1015, 978, 913, 886, 859, 821, 749, 694, 618 cm -1 ; mp = 121.0-124.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 345 (M -), HRMS (ESI) calcd for C 13 H 9 BrF 3 N 3 O 5 [MH] -: 344.0498 Found:. 344.0494; 84% yield

Figure 2012111745
Figure 2012111745

化合物1k:(4S,5S)and (4R,5R)−5−(2−クロロ−5−ニトロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.22 (s, 3H), 5.96 (s, 1H), 6.29 (d, J = 16.2 Hz, 1H), 7.49 (d, J = 15.9 Hz, 1H), 7.58 (d, J = 8.7 Hz, 1H), 8.14 (dd, J = 2.6, 8.9 Hz, 1H), 8.28 (d, J = 2.7 Hz, 2H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.3 (q, J = 31.2 Hz), 95.9, 118.9, 122.4, 122.6 (q, J = 286.2 Hz), 124.7, 131.1, 133.5, 134.2, 140.6, 146.7, 149.7; 19F NMR (CDCl, 188 MHz) δ -80.5 (s, 3F); IR (KBr) 3071, 3007, 1760, 1608, 1562, 1529, 1463, 1433, 1349, 1260, 1192, 1143, 1095, 1047, 985, 911, 822, 768, 741, 721, 665 cm−1; mp = 155.0-157.5 ℃ (CHCl/Hexane); MS (ESI, m/z) 379 (M-), HRMS (ESI) calcd. for C13HClFNO [M-H]-: 378.0105 Found: 378.0106; 67%収率
Compound 1k: (4S, 5S) and (4R, 5R) -5- (2-chloro-5-nitrostyryl) -5- (trifluoromethyl) -4,5-dihydro-3-methyl-4-nitro- 2-Isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.22 (s, 3H), 5.96 (s, 1H), 6.29 (d, J = 16.2 Hz, 1H), 7.49 (d, J = 15.9 Hz, 1H), 7.58 (d, J = 8.7 Hz, 1H), 8.14 (dd, J = 2.6, 8.9 Hz, 1H), 8.28 (d, J = 2.7 Hz, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.3 (q, J = 31.2 Hz), 95.9, 118.9, 122.4, 122.6 (q, J = 286.2 Hz), 124.7, 131.1, 133.5, 134.2, 140.6, 146.7, 149.7; 19 F NMR (CDCl 3 , 188 MHz) δ -80.5 (s, 3F); IR (KBr) 3071, 3007, 1760, 1608, 1562, 1529, 1463, 1433, 1349, 1260, 1192, 1143, 1095, 1047, 985, 911, 822, 768, 741 , 721, 665 cm −1 ; mp = 155.0-157.5 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 379 (M ), HRMS (ESI) calcd. For C 13 H 8 ClF 3 N 3 O 5 [MH] : 378.0105 Found: 378.0106; 67% yield

Figure 2012111745
Figure 2012111745

化合物1l:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−5−((E)−2−(フラン−2−イル)ビニル)−4,5−ジヒドロ−3−メチル−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.17 (s, 3H), 5.87 (s, 1H), 6.03 (d, J = 15.6 Hz, 1H), 6.39-6.43 (m, 2H), 6.87 (d, J = 15.6 Hz, 1H), 7.40 (s, 1H); 13C NMR (CDCl, 150.9 MHz) δ 11.8, 88.7 (q, J = 31.2 Hz), 95.9, 110.2, 111.8, 112.6, 122.8 (q, J = 286.7 Hz), 126.0, 143.8, 149.6, 150.2; 19F NMR (CDCl, 188 MHz) δ -80.9 (s, 3F); IR (KBr) 3000, 2925, 1663, 1566, 1488, 1435, 1395, 1366, 1328, 1266, 1186, 1143, 1092, 1018, 1143, 1092, 1018, 969, 930, 909, 882, 801, 768, 743, 636 cm−1; mp = 64.0-67.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 290 (M-), HRMS (ESI) calcd. for C11HFNO [M-H]-: 289.0436 Found: 289.0436; 86%収率
Compound 11: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -5-((E) -2- (furan-2-yl) vinyl) -4,5-dihydro-3- Methyl-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.17 (s, 3H), 5.87 (s, 1H), 6.03 (d, J = 15.6 Hz, 1H), 6.39-6.43 (m, 2H), 6.87 (d, J = 15.6 Hz, 1H), 7.40 (s, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 11.8, 88.7 (q, J = 31.2 Hz), 95.9, 110.2, 111.8, 112.6, 122.8 (q, J = 286.7 Hz), 126.0, 143.8, 149.6, 150.2; 19 F NMR (CDCl 3 , 188 MHz) δ -80.9 (s, 3F); IR (KBr) 3000, 2925, 1663, 1566, 1488, 1435, 1395 , 1366, 1328, 1266, 1186, 1143, 1092, 1018, 1143, 1092, 1018, 969, 930, 909, 882, 801, 768, 743, 636 cm -1 ; mp = 64.0-67.0 ° C (CH 2 Cl 2 (Hexane); MS (ESI, m / z) 290 (M ), HRMS (ESI) calcd. For C 11 H 8 F 3 N 2 O 4 [MH] : 289.0436 Found: 289.0436; 86% yield

Figure 2012111745
Figure 2012111745

化合物1m:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−5−スチリル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 6.18 (d, J = 15.9 Hz), 6.40 (s, 1H), 7.21 (d, J = 15.6 Hz, 1H), 7.34-7.52 (m, 8H), 7.68 (d, J = 7.2 Hz, 2H); 13C NMR (CDCl, 150.9 MHz) δ 89.9 (q, J = 30.5 Hz), 93.6, 112.1, 121.9 (q, J = 287.2 Hz), 125.7, 126.7, 127.4, 128.8, 129.5, 129.6, 131.9, 134.3, 139.3, 151.9; 19F NMR (CDCl, 188 MHz) δ -80.4 (s, 3F); IR (KBr) 2990, 1651, 1563, 1448, 1346, 1265, 1212, 1188, 1139, 1066, 978, 937, 911, 784, 756, 691, 545, 519, 499 cm−1; mp = 122.0-125.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 362 (M-), HRMS (ESI) calcd. for C18H12FNO [M-H]-: 361.0800 Found: 361.0800; 90%収率
Compound 1m: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-3-phenyl-5-styryl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 6.18 (d, J = 15.9 Hz), 6.40 (s, 1H), 7.21 (d, J = 15.6 Hz, 1H), 7.34-7.52 (m, 8H), 7.68 (d, J = 7.2 Hz, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 89.9 (q, J = 30.5 Hz), 93.6, 112.1, 121.9 (q, J = 287.2 Hz), 125.7, 126.7, 127.4, 128.8, 129.5, 129.6, 131.9, 134.3, 139.3, 151.9; 19 F NMR (CDCl 3 , 188 MHz) δ-80.4 (s, 3F); IR (KBr) 2990, 1651, 1563, 1448, 1346, 1265 , 1212, 1188, 1139, 1066, 978, 937, 911, 784, 756, 691, 545, 519, 499 cm −1 ; mp = 122.0-125.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 362 (M ), HRMS (ESI) calcd. for C 18 H 12 F 3 N 2 O 3 [MH] : 361.0800 Found: 361.0800; 90% yield

Figure 2012111745
Figure 2012111745

化合物1n:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−スチリル−3−p−トリル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.40 (s, 3H), 6.18 (d, J = 15.9 Hz, 1H), 6.38 (s, 1H), 7.20 (d, J = 15.9 Hz, 1H), 7.27 (d, J = 8.4 Hz, 2H), 7.34-7.41 (m, 5H), 7.57 (d, J = 7.8 Hz, 2H); 13C NMR (CDCl, 150.9 MHz) δ 21.5, 89.7 (q, J = 30.7 Hz), 93.7, 112.2, 122.87, 122.91 (q, J = 287.2), 126.6, 127.4, 128.8, 129.6, 130.1, 134.3, 139.2, 142.6, 151.9; 19F NMR (CDCl, 188 MHz) δ -80.4 (s, 3F); IR (KBr) 2990, 1652, 1568, 1451, 1344, 1266, 1191, 1140, 1068, 978, 933, 909, 867, 818, 753, 691, 564, 538, 499, 471 cm−1; mp = 139.0-141.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 376 (M-), HRMS (ESI) calcd. for C19H14FNO [M-H]-: 375.0957 Found: 375.0956; 95%収率
Compound 1n: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-5-styryl-3-p-tolyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.40 (s, 3H), 6.18 (d, J = 15.9 Hz, 1H), 6.38 (s, 1H), 7.20 (d, J = 15.9 Hz, 1H), 7.27 (d, J = 8.4 Hz, 2H), 7.34-7.41 (m, 5H), 7.57 (d, J = 7.8 Hz, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 21.5, 89.7 (q, J = 30.7 Hz), 93.7, 112.2, 122.87, 122.91 (q, J = 287.2), 126.6, 127.4, 128.8, 129.6, 130.1, 134.3, 139.2, 142.6, 151.9; 19 F NMR (CDCl 3 , 188 MHz) δ- 80.4 (s, 3F); IR (KBr) 2990, 1652, 1568, 1451, 1344, 1266, 1191, 1140, 1068, 978, 933, 909, 867, 818, 753, 691, 564, 538, 499, 471 cm -1; mp = 139.0-141.0 ℃ ( CH 2 Cl 2 / Hexane);. MS (ESI, m / z) 376 (M -), HRMS (ESI) calcd for C 19 H 14 F 3 N 2 O 3 [MH] - : 375.0957 Found: 375.0956; 95% yield

Figure 2012111745
Figure 2012111745

化合物1o:(4S,5S)and (4R,5R)−5−(4−メチルスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.35 (s, 3H), 6.12 (d, J = 16.2 Hz, 1H), 6.38 (s, 1H), 7.14-7.19 (m, 3H), 7.30 (d, J = 7.8 Hz, 1H), 7.44-7.55 (m, 3H), 7.66-7.69 (m, 2H); 13C NMR (CDCl, 150.9 MHz) δ 21.3, 90.0 (q, J = 30.7 Hz), 93.6, 110.9, 122.9 (q, J = 286.7 Hz), 125.8, 126.6, 127.3, 129.42, 129.48, 131.6, 131.9, 139.1, 139.8, 151.9; 19F NMR (CDCl, 188 MHz) δ -80.5 (s, 3F); IR (KBr) 3001, 1652, 1575, 1514, 1447, 1346, 1262, 1206, 1181, 1139, 1067, 975, 904, 796, 754, 687, 565, 506 cm−1; mp = 111.0-112.5 ℃ (CHCl/Hexane); MS (ESI, m/z) 376 (M-), HRMS (ESI) calcd. for C19H14FNO [M-H]-: 375.0957 Found: 379.0958; 90%収率
Compound 1o: (4S, 5S) and (4R, 5R) -5- (4-methylstyryl) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-3-phenyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.35 (s, 3H), 6.12 (d, J = 16.2 Hz, 1H), 6.38 (s, 1H), 7.14-7.19 (m, 3H), 7.30 (d, J = 7.8 Hz, 1H), 7.44-7.55 (m, 3H), 7.66-7.69 (m, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 21.3, 90.0 (q, J = 30.7 Hz), 93.6 , 110.9, 122.9 (q, J = 286.7 Hz), 125.8, 126.6, 127.3, 129.42, 129.48, 131.6, 131.9, 139.1, 139.8, 151.9; 19 F NMR (CDCl 3 , 188 MHz) δ -80.5 (s, 3F ); IR (KBr) 3001, 1652, 1575, 1514, 1447, 1346, 1262, 1206, 1181, 1139, 1067, 975, 904, 796, 754, 687, 565, 506 cm -1 ; mp = 111.0-112.5 ℃ (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 376 (M ), HRMS (ESI) calcd. For C 19 H 14 F 3 N 2 O 3 [MH] - : 375.0957 Found: 379.0958 90% yield

Figure 2012111745
Figure 2012111745

化合物1p:(4S,5S)and (4R,5R)−5−(4−クロロスチリル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3−フェニル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 6.16 (d, J = 15.9 Hz, 1H), 6.40 (s, 1H), 7.16 (d, J = 15.9 Hz, 1H), 7.33 (s, 4H), 7.44-7.53 (m, 3H), 7.68 (dd, J = 1.8, 7.8 Hz); 13C NMR (CDCl, 150.9 MHz) δ 89.8 (q, J = 30.7 Hz), 93.6, 112.8, 122.8 (q, J = 286.7 Hz), 125.6, 126.7, 128.6, 129.1, 129.5, 132.0, 132.7, 135.5, 138.0, 152.0; 19F NMR (CDCl, 188 MHz) δ -80.4 (s, 3F); IR (KBr) 2990, 1653, 1563, 1493, 1446, 1409, 1349, 1279, 1213, 1185, 1144, 1092, 993, 978, 938, 911, 849, 804, 782, 755, 687, 565, 503 cm−1; mp = 115.0-117.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 396 (M-), HRMS (ESI) calcd. for C18H11ClFNO [M-H]-: 395.0410 Found: 395.0413; 96%収率
Compound 1p: (4S, 5S) and (4R, 5R) -5- (4-chlorostyryl) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-3-phenyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 6.16 (d, J = 15.9 Hz, 1H), 6.40 (s, 1H), 7.16 (d, J = 15.9 Hz, 1H), 7.33 (s, 4H), 7.44 -7.53 (m, 3H), 7.68 (dd, J = 1.8, 7.8 Hz); 13 C NMR (CDCl 3 , 150.9 MHz) δ 89.8 (q, J = 30.7 Hz), 93.6, 112.8, 122.8 (q, J = 286.7 Hz), 125.6, 126.7, 128.6, 129.1, 129.5, 132.0, 132.7, 135.5, 138.0, 152.0; 19 F NMR (CDCl 3 , 188 MHz) δ -80.4 (s, 3F); IR (KBr) 2990, 1653, 1563, 1493, 1446, 1409, 1349, 1279, 1213, 1185, 1144, 1092, 993, 978, 938, 911, 849, 804, 782, 755, 687, 565, 503 cm -1 ; mp = 115.0 -117.0 ℃ (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 396 (M -), HRMS (ESI) calcd for C 18 H 11 ClF 3 N 2 O 3 [MH] -:. 395.0410 Found : 395.0413; 96% yield

Figure 2012111745
Figure 2012111745

化合物1q:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−3,5−ジフェニル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 6.65 (s, 1H), 7.42 (m, 6H), 7.62-7.64 (m, 2H), 7.71-7.74 (m, 2H); 13C NMR (CDCl, 150.9 MHz) δ 91.6 (q, J = 30.2 Hz), 94.1, 123.1 (q, J = 288.2 Hz), 125.4, 126.4, 126.7, 128.1, 129.0, 129.5, 130.6, 132.0, 152.6; 19F NMR (CDCl, 188 MHz) δ -78.6 (s, 3F); IR (KBr) 3010, 1581, 1498, 1450, 1345, 1261, 1199, 1073, 997, 974, 936, 906, 787, 753, 711, 684, 645, 559, 516 cm−1; mp = 123.0-124.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 336 (M-), HRMS (ESI) calcd. for C16H10FNO [M-H]-: 335.0644 Found: 335.0641; 86%収率
Compound 1q: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-3,5-diphenyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 6.65 (s, 1H), 7.42 (m, 6H), 7.62-7.64 (m, 2H), 7.71-7.74 (m, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 91.6 (q, J = 30.2 Hz), 94.1, 123.1 (q, J = 288.2 Hz), 125.4, 126.4, 126.7, 128.1, 129.0, 129.5, 130.6, 132.0, 152.6; 19 F NMR (CDCl 3 , 188 MHz) δ -78.6 (s, 3F); IR (KBr) 3010, 1581, 1498, 1450, 1345, 1261, 1199, 1073, 997, 974, 936, 906, 787, 753, 711, 684, 645 , 559, 516 cm −1 ; mp = 123.0-124.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 336 (M ), HRMS (ESI) calcd. For C 16 H 10 F 3 N 2 O 3 [MH] - : 335.0644 Found: 335.0641; 86% yield

Figure 2012111745
Figure 2012111745

化合物1r:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−フェニル−3−p−トリル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.40 (s, 3H), 6.62 (s, 1H), 7.27 (d, J = 8.4 Hz, 2H), 7.44-7.46 (m, 3H), 7.62 (d, J = 8.1 Hz, 4H); 13C NMR (CDCl, 150.9 MHz) δ 21.5, 91.4 (q, J = 29.7 Hz), 94.3, 122.6, 123.1 (q, J = 287.7 Hz), 126.4, 126.6, 128.2, 128.9, 130.2, 130.5, 142.8, 152.6; 19F NMR (CDCl, 188 MHz) δ -78.6 (s, 3F); IR (KBr) 2986, 1567, 1498, 1452, 1363, 1269, 1203, 1167, 1076, 991, 933, 906, 817, 765, 729, 697, 647, 565, 530 cm−1; mp = 114.5-116.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 350 (M-), HRMS (ESI) calcd. for C17H12FNO [M-H]-: 349.0800 Found: 349.0801; 85%収率
Compound 1r: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-5-phenyl-3-p-tolyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.40 (s, 3H), 6.62 (s, 1H), 7.27 (d, J = 8.4 Hz, 2H), 7.44-7.46 (m, 3H), 7.62 (d, 13 C NMR (CDCl 3 , 150.9 MHz) δ 21.5, 91.4 (q, J = 29.7 Hz), 94.3, 122.6, 123.1 (q, J = 287.7 Hz), 126.4, 126.6, 128.2 , 128.9, 130.2, 130.5, 142.8, 152.6; 19 F NMR (CDCl 3 , 188 MHz) δ -78.6 (s, 3F); IR (KBr) 2986, 1567, 1498, 1452, 1363, 1269, 1203, 1167, 1076, 991, 933, 906, 817, 765, 729, 697, 647, 565, 530 cm −1 ; mp = 114.5-116.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 350 ( M ), HRMS (ESI) calcd. For C 17 H 12 F 3 N 2 O 3 [MH] : 349.0800 Found: 349.0801; 85% yield

Figure 2012111745
Figure 2012111745

化合物1s:(4S,5S)and (4R,5R)−3−(4−クロロフェニル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−5−フェニル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 6.60 (s, 1H), 7.42-7.48 (m, 5H), 7.60-7.62 (m, 2H), 7.64-7.69 (m, 2H); 13C NMR (CDCl, 150.9 MHz) δ 91.9 (q, J = 29.7 Hz), 94.0, 123.0 (q, J = 287.2 Hz), 123.9, 126.3, 127.9, 129.0, 129.9, 130.7, 138.4, 151.7; 19F NMR (CDCl, 188 MHz) δ -78.6 (s, 3F); IR (KBr) 3080, 3002, 1573, 1496, 1453, 1404, 1338, 1261, 1173, 1094, 1071, 1040, 995, 940, 908, 838, 765, 730, 702, 645, 557, 512 cm−1;mp = 110.0-113.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 370 (M-), HRMS (ESI) calcd. for C16HClFNO [M-H]-: 369.0254 Found: 369.0250; 89%収率
Compound 1s: (4S, 5S) and (4R, 5R) -3- (4-chlorophenyl) -5- (trifluoromethyl) -4,5-dihydro-4-nitro-5-phenyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 6.60 (s, 1H), 7.42-7.48 (m, 5H), 7.60-7.62 (m, 2H), 7.64-7.69 (m, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 91.9 (q, J = 29.7 Hz), 94.0, 123.0 (q, J = 287.2 Hz), 123.9, 126.3, 127.9, 129.0, 129.9, 130.7, 138.4, 151.7; 19 F NMR (CDCl 3 , 188 MHz) δ -78.6 (s, 3F); IR (KBr) 3080, 3002, 1573, 1496, 1453, 1404, 1338, 1261, 1173, 1094, 1071, 1040, 995, 940, 908, 838, 765 , 730, 702, 645, 557, 512 cm −1 ; mp = 110.0-113.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 370 (M ), HRMS (ESI) calcd. For C 16 H 9 ClF 3 N 2 O 3 [MH] : 369.0254 Found: 369.0250; 89% yield

Figure 2012111745
Figure 2012111745

化合物1t:(4S,5S)and (4R,5R)−3−(4−ブロモ−3−メチルフェニル)−5−(3,5−ジクロロフェニル)−5−(トリフルオロメチル)−4,5−ジヒドロ−4−ニトロ−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 2.45 (s, 3H), 6.56 (s, 1H), 7.34-7.37 (m, 1H), 7.49-7.51 (m, 3H), 7.59 (d, J = 1.8 Hz, 1H), 7.65 (d, J = 8.4 Hz, 1H); 13C NMR (CDCl, 150.9 MHz) δ 23.0, 90.5 (q, J = 30.7 Hz), 93.9, 122.6 (q, J = 287.7 Hz), 125.1, 125.3, 128.6, 129.7, 131.0, 131.2, 133.7, 136.0, 139.9, 152.1; 19F NMR (CDCl, 188 MHz) δ -78.3 (s, 3F); IR (KBr) 3084, 3020, 1573, 1484, 1423, 1365, 1344, 1262, 1227, 1188, 1105, 1034, 989, 931, 902, 865, 822, 806, 686, 664, 580, 519 cm−1; mp = 141.0-144.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 496 (M-), HRMS (ESI) calcd. for C17HBrClFNO [M-H]-: 494.9126 Found: 494.9131; 88%収率
Compound 1t: (4S, 5S) and (4R, 5R) -3- (4-bromo-3-methylphenyl) -5- (3,5-dichlorophenyl) -5- (trifluoromethyl) -4,5- Dihydro-4-nitro-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 2.45 (s, 3H), 6.56 (s, 1H), 7.34-7.37 (m, 1H), 7.49-7.51 (m, 3H), 7.59 (d, J = 1.8 Hz, 1H), 7.65 (d, J = 8.4 Hz, 1H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 23.0, 90.5 (q, J = 30.7 Hz), 93.9, 122.6 (q, J = 287.7 Hz ), 125.1, 125.3, 128.6, 129.7, 131.0, 131.2, 133.7, 136.0, 139.9, 152.1; 19 F NMR (CDCl 3 , 188 MHz) δ -78.3 (s, 3F); IR (KBr) 3084, 3020, 1573 , 1484, 1423, 1365, 1344, 1262, 1227, 1188, 1105, 1034, 989, 931, 902, 865, 822, 806, 686, 664, 580, 519 cm -1 ; mp = 141.0-144.0 ° C (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 496 (M ), HRMS (ESI) calcd. For C 17 H 9 BrCl 2 F 3 N 2 O 3 [MH] : 494.9126 Found: 494.9131; 88% yield

Figure 2012111745
Figure 2012111745

化合物1u:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−5−メチル−4−ニトロ−3−フェニル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 1.71 (s, 3H), 6.27 (s, 1H), 7.43-7.51 (m, 3H), 7.63-7.66 (m, 2H); 13C NMR (CDCl, 150.9 MHz) δ 13.9, 87.8 (q, J = 30.7 Hz), 93.0, 123.4 (q, J = 286.2 Hz), 125.7, 126.5, 129.4, 131.8, 151.9; 19F NMR (CDCl, 188 MHz) δ -82.2 (s, 3F); IR (KBr) 2994, 2915, 1967, 1565, 1499, 1449, 1367, 1288, 1174, 1098, 1000, 937, 858, 784, 755, 716, 689, 580, 562, 537, 500, 450 cm−1; mp = 44.0-46.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 274 (M-), HRMS (ESI) calcd. for C11HFNO [M-H]-: 273.0487 Found: 273.0482; 72%収率
Compound 1u: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-5-methyl-4-nitro-3-phenyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 1.71 (s, 3H), 6.27 (s, 1H), 7.43-7.51 (m, 3H), 7.63-7.66 (m, 2H); 13 C NMR (CDCl 3 , 150.9 MHz) δ 13.9, 87.8 (q, J = 30.7 Hz), 93.0, 123.4 (q, J = 286.2 Hz), 125.7, 126.5, 129.4, 131.8, 151.9; 19 F NMR (CDCl 3 , 188 MHz) δ- 82.2 (s, 3F); IR (KBr) 2994, 2915, 1967, 1565, 1499, 1449, 1367, 1288, 1174, 1098, 1000, 937, 858, 784, 755, 716, 689, 580, 562, 537 , 500, 450 cm −1 ; mp = 44.0-46.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 274 (M ), HRMS (ESI) calcd. For C 11 H 8 F 3 N 2 O 3 [MH] - : 273.0487 Found: 273.0482; 72% yield

Figure 2012111745
Figure 2012111745

化合物1v:(4S,5S)and (4R,5R)−5−(トリフルオロメチル)−4,5−ジヒドロ−5−メチル−4−ニトロ−3−p−トリル−2−イソキサゾール
H NMR (CDCl, 300 MHz) δ 1.70 (s, 1H), 2.39 (s, 3H), 6.25 (s, 1H), 7.26 (d, J = 8.4 Hz, 2H), 7.53 (d, J = 8.1 Hz, 2H); 13C NMR (CDCl, 150.9 MHz) δ 13.9, 21.5, 87.5 (q, J = 30.7 Hz), 93.1, 122.9, 123.4 (q, J = 286.7 Hz), 126.5, 130.1, 142.5, 151.8; 19F NMR (CDCl, 188 MHz) δ -82.2 (s, 3F); IR (KBr) 2980, 2927, 1917, 1574, 1451, 1365, 1285, 1173, 1096, 1045, 934, 861, 818, 774, 710, 613, 580, 562, 533, 499, 471 cm−1; mp = 85.0-86.0 ℃ (CHCl/Hexane); MS (ESI, m/z) 288 (M-), HRMS (ESI) calcd. for C12H10FNO [M-H]-: 287.0644 Found: 287.0644; 64%収率
Compound 1v: (4S, 5S) and (4R, 5R) -5- (trifluoromethyl) -4,5-dihydro-5-methyl-4-nitro-3-p-tolyl-2-isoxazole
1 H NMR (CDCl 3 , 300 MHz) δ 1.70 (s, 1H), 2.39 (s, 3H), 6.25 (s, 1H), 7.26 (d, J = 8.4 Hz, 2H), 7.53 (d, J = 13 C NMR (CDCl 3 , 150.9 MHz) δ 13.9, 21.5, 87.5 (q, J = 30.7 Hz), 93.1, 122.9, 123.4 (q, J = 286.7 Hz), 126.5, 130.1, 142.5 , 151.8; 19 F NMR (CDCl 3 , 188 MHz) δ-82.2 (s, 3F); IR (KBr) 2980, 2927, 1917, 1574, 1451, 1365, 1285, 1173, 1096, 1045, 934, 861, 818, 774, 710, 613, 580, 562, 533, 499, 471 cm −1 ; mp = 85.0-86.0 ° C. (CH 2 Cl 2 / Hexane); MS (ESI, m / z) 288 (M ), HRMS (ESI) calcd for C 12 H 10 F 3 N 2 O 3 [MH] -: 287.0644 Found:. 287.0644; 64% yield

本発明に係る5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物は、有害生物防除剤や、医薬品や電子材料等の機能性材料の製造中間体として有用である。また、本発明に係る製造方法は、有害生物防除剤や、医薬品や電子材料等の機能性材料の製造中間体を製造することができるので有用である。   The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to the present invention is useful as an intermediate for producing pesticides and functional materials such as pharmaceuticals and electronic materials. Moreover, the production method according to the present invention is useful because it can produce a pesticide and a production intermediate of a functional material such as a pharmaceutical or an electronic material.

Claims (8)

下記一般式(1)
Figure 2012111745
(式中、RおよびRは、互いに独立して置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基を示す。)
で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物。
The following general formula (1)
Figure 2012111745
(In the formula, R 1 and R 2 each independently represent a substituted or unsubstituted alkyl group, alkenyl group, alkynyl group, or aryl group.)
A 5-trifluoromethyl-4-nitro-2-isoxazoline compound represented by:
上記Rが、メチル基、置換若しくは未置換のビニル基、または、置換若しくは未置換のフェニル基である請求項1に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物。 The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to claim 1, wherein R 1 is a methyl group, a substituted or unsubstituted vinyl group, or a substituted or unsubstituted phenyl group. 上記Rが、メチル基、または、置換若しくは未置換のフェニル基である請求項1または2に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物。 The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to claim 1 or 2, wherein R 2 is a methyl group or a substituted or unsubstituted phenyl group. 下記一般式(1)
Figure 2012111745
(式中、RおよびRは、互いに独立して置換若しくは未置換のアルキル基,アルケニル基,アルキニル基,アリール基を示す。)
で表される5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法であって、
下記一般式(2)
Figure 2012111745
(式中、RおよびRは、一般式(1)と同じ。)
で表される4−ニトロ−2−イソキサゾール化合物と、(トリフルオロメチル)トリメチルシラン(CFSiMe)とを反応させることを特徴とする5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法。
The following general formula (1)
Figure 2012111745
(In the formula, R 1 and R 2 each independently represent a substituted or unsubstituted alkyl group, alkenyl group, alkynyl group, or aryl group.)
A process for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound represented by:
The following general formula (2)
Figure 2012111745
(In the formula, R 1 and R 2 are the same as those in the general formula (1).)
A 5-nitro-2-isoxazoline compound represented by the formula ( 5 ) is reacted with (trifluoromethyl) trimethylsilane (CF 3 SiMe 3 ). Manufacturing method.
相間移動触媒および塩基の存在下、溶液中で反応させることを特徴とする請求項4に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法。   The method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to claim 4, wherein the reaction is carried out in a solution in the presence of a phase transfer catalyst and a base. 上記相間移動触媒がセチルトリメチルアンモニウムブロミドであることを特徴とする請求項5に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法。   The method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to claim 5, wherein the phase transfer catalyst is cetyltrimethylammonium bromide. 上記塩基が酢酸ナトリウムであることを特徴とする請求項5に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法。   6. The method for producing a 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to claim 5, wherein the base is sodium acetate. 反応後に酸処理を行うことによって、一方のジアステレオマーのみを得ることを特徴とする請求項4から7の何れか一項に記載の5−トリフルオロメチル−4−ニトロ−2−イソキサゾリン化合物の製造方法。   The 5-trifluoromethyl-4-nitro-2-isoxazoline compound according to any one of claims 4 to 7, wherein only one diastereomer is obtained by performing an acid treatment after the reaction. Production method.
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