CN102341362B - 一种制备酰基苯的方法 - Google Patents
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- 238000002360 preparation method Methods 0.000 title abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 37
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 239000007818 Grignard reagent Substances 0.000 claims abstract description 10
- 150000004795 grignard reagents Chemical class 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 16
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 claims description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical group [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 4
- 125000002252 acyl group Chemical group 0.000 claims description 4
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052794 bromium Inorganic materials 0.000 claims description 4
- HZCCQSNRYZNUJT-UHFFFAOYSA-N C(C1=CC=CC=C1)(=O)C(C(C1=CC=CC=C1)=O)[Fe] Chemical compound C(C1=CC=CC=C1)(=O)C(C(C1=CC=CC=C1)=O)[Fe] HZCCQSNRYZNUJT-UHFFFAOYSA-N 0.000 claims description 3
- 238000003747 Grignard reaction Methods 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 claims description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical group II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 3
- QELOLALDTFCIJY-UHFFFAOYSA-N iron;1,1,1-trifluoropentane-2,4-dione Chemical compound [Fe].CC(=O)CC(=O)C(F)(F)F QELOLALDTFCIJY-UHFFFAOYSA-N 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 3
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- LUKBXSAWLPMMSZ-OWOJBTEDSA-N Trans-resveratrol Chemical compound C1=CC(O)=CC=C1\C=C\C1=CC(O)=CC(O)=C1 LUKBXSAWLPMMSZ-OWOJBTEDSA-N 0.000 abstract description 14
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- 229940016667 resveratrol Drugs 0.000 abstract description 5
- 235000021283 resveratrol Nutrition 0.000 abstract description 5
- 239000000543 intermediate Substances 0.000 abstract 1
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- CCERQOYLJJULMD-UHFFFAOYSA-M magnesium;carbanide;chloride Chemical compound [CH3-].[Mg+2].[Cl-] CCERQOYLJJULMD-UHFFFAOYSA-M 0.000 description 8
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- 241000694440 Colpidium aqueous Species 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
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- 238000003786 synthesis reaction Methods 0.000 description 6
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 6
- QBTDQJMLMVEUTQ-UHFFFAOYSA-N 3,5-diacetyloxybenzoic acid Chemical compound CC(=O)OC1=CC(OC(C)=O)=CC(C(O)=O)=C1 QBTDQJMLMVEUTQ-UHFFFAOYSA-N 0.000 description 3
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- OEGPRYNGFWGMMV-UHFFFAOYSA-N (3,4-dimethoxyphenyl)methanol Chemical compound COC1=CC=C(CO)C=C1OC OEGPRYNGFWGMMV-UHFFFAOYSA-N 0.000 description 2
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- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 2
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- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QAMFBRUWYYMMGJ-UHFFFAOYSA-N hexafluoroacetylacetone Chemical compound FC(F)(F)C(=O)CC(=O)C(F)(F)F QAMFBRUWYYMMGJ-UHFFFAOYSA-N 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QFBUFKRWGXGPEH-UHFFFAOYSA-N (3-acetyloxy-5-carbonochloridoylphenyl) acetate Chemical compound CC(=O)OC1=CC(OC(C)=O)=CC(C(Cl)=O)=C1 QFBUFKRWGXGPEH-UHFFFAOYSA-N 0.000 description 1
- XVMSFILGAMDHEY-UHFFFAOYSA-N 6-(4-aminophenyl)sulfonylpyridin-3-amine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)C1=CC=C(N)C=N1 XVMSFILGAMDHEY-UHFFFAOYSA-N 0.000 description 1
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JRZJKWGQFNTSRN-UHFFFAOYSA-N Geldanamycin Natural products C1C(C)CC(OC)C(O)C(C)C=C(C)C(OC(N)=O)C(OC)CCC=C(C)C(=O)NC2=CC(=O)C(OC)=C1C2=O JRZJKWGQFNTSRN-UHFFFAOYSA-N 0.000 description 1
- AEMRFAOFKBGASW-UHFFFAOYSA-M Glycolate Chemical compound OCC([O-])=O AEMRFAOFKBGASW-UHFFFAOYSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- YJAPRXUBKGBOCB-UHFFFAOYSA-N [Fe].C(C1=CC=CC=C1)(=O)Cl Chemical compound [Fe].C(C1=CC=CC=C1)(=O)Cl YJAPRXUBKGBOCB-UHFFFAOYSA-N 0.000 description 1
- CUJRVFIICFDLGR-UHFFFAOYSA-N acetylacetonate Chemical compound CC(=O)[CH-]C(C)=O CUJRVFIICFDLGR-UHFFFAOYSA-N 0.000 description 1
- 125000005595 acetylacetonate group Chemical group 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 238000005917 acylation reaction Methods 0.000 description 1
- 238000005575 aldol reaction Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000008365 aromatic ketones Chemical class 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- QTQAWLPCGQOSGP-GBTDJJJQSA-N geldanamycin Chemical compound N1C(=O)\C(C)=C/C=C\[C@@H](OC)[C@H](OC(N)=O)\C(C)=C/[C@@H](C)[C@@H](O)[C@H](OC)C[C@@H](C)CC2=C(OC)C(=O)C=C1C2=O QTQAWLPCGQOSGP-GBTDJJJQSA-N 0.000 description 1
- 235000009200 high fat diet Nutrition 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
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- 238000003408 phase transfer catalysis Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
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- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/28—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
- C07C67/293—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
一种制备酰基苯的方法,所述的方法包括将二乙酰氧基苯甲酰氯在含铁催化剂存在下与格氏试剂进行反应。所述酰基苯是用于制备白藜芦醇的多步骤方法中的非常有用的中间体。
Description
技术领域
本发明涉及一种用于生产白藜芦醇的多步骤工艺方法。特别地,本发明涉及一种制备如式(I)所示的3,5-二乙酰氧基酰基苯的方法以及其作为制备白藜芦醇中间体的用途,
其中R为具有1-10个碳原子的低级烷基基团。
背景技术
白藜芦醇,学名3,4′,5-三羟基二苯乙烯,是一种已知的天然产生的化合物。由于其生物学价值和药学活性,近年来广受关注。有报道称白藜芦醇展现出多种疾病治疗和预防作用,例如包括作为被称为“法国悖论(FrenchParadox)”现象发生的原因。地中海式饮食习惯的人们食用大量的脂肪和酒精,但罹患癌症和心脏病的比率却很低,这一现象被称为法国悖论(Frenchparadox)。在许多细胞和动物实验当中可以看到白藜芦醇的作用,例如不仅抑制皮肤肿瘤和白血病还抑制血小板的聚集和凝聚的抑制作用。另外,白藜芦醇还可以作为弛缓剂、杀菌剂和杀真菌剂。最近公布的数据表明白藜芦醇可以延长高脂肪饮食的小鼠的寿命。
有许多关于白藜芦醇合成的报告。ZL 200480025470描述了一种以3,5-二乙酰氧基苯乙酮作为起始原料制备白藜芦醇的方法。J.Liu于2007年8月发表了白藜芦醇合成方法的综述(见Jing Liu,白藜芦醇及其类似物的合成,相转移催化非对称羟基乙酸β-羟基丁醛酯反应,8,9-甲基氨基-.格尔德霉素,2007年8月J.Liu,Synthesis of resveratrol and its analogs,phase-transfer catalysed asymmetric glycolate aldol reactions,and totalsynthesis of 8,9-methylamido-geldanamycin,Brigham,Department ofChemistry and Biochemistry,Brigham Young University,August 2007)。在这条路线中使用了3,5-二乙酰氧基苯乙酮,正如其中所述,“之前没有尝试过3,5-二乙酰氧基苯甲酰氯(见17页第一行)”。根据发明人的了解,现在还没有专门合成3,5-二乙酰氧基苯乙酮的报道。
陆振荣等报道了一种3,5-二羟基苯乙酮的合成方法,由3,5-二羟基苯甲酸作为起始原料,经酯化、氯化、甲基化制得,但是其产率仅为41%(参见陆振荣等,3,5-二羟基苯乙酮合成研究,陕西化工,1998年3月,第12-13页)。
另外一条合成路线涉及酰基氯在室温下在三乙酰丙酮铁(III)的催化下与格氏试剂结合的反应,但是并没有披露合成3,5-二乙酰氧基苯乙酮的方法(V.Fiandanese等,铁催化下的酰基氯与格氏试剂的交叉偶联反应.一种温和的、普遍的、便捷的合成脂肪族和芳香族酮的方法,四面体快报,V.Fiandanese,et al,Iron catalyzed cross-coupling reactions of acyl chlorides withGrignard reagents.A mild,general,and convenient synthesis of aliphatic andaromatic ketones.Tetrahedron Letters,Vol.25,No.42,pp 4805-4808,1984)。
因此,考虑到多步合成白藜芦醇的重要性,有必要提供一种工业合成3,5-二乙酰氧基苯乙酮的方法。
发明内容
因此,在广泛调查研究的基础上,经过试验数据的验证,本发明的发明人成功地开发了制备3,5-二乙酰氧基苯乙酮及其类似物的新路线。因此,本发明提供了一种制备3,5-二乙酰氧基苯乙酮及其类似物的方法,包括以下步骤:(1)在吡啶的催化下使3,5-二羟基苯甲酸与酸酐进行酰化反应,得到3,5-二酰氧基苯甲酸,优选与乙酸酐形成3,5-二乙酰氧基苯甲酸;(2)3,5-二酰氧基苯甲酸(优选3,5-二乙酰氧基苯甲酸)在二氯甲烷中与亚硫酰氯进行氯化反应,得到二酰氧基苯甲酰氯(优选二乙酰氧基苯甲酰氯);(3)将二酰氧基苯甲酰氯(优选二乙酰氧基苯甲酰氯)在含铁的催化剂的存在下与格氏试剂反应获得3,5-二乙酰氧基苯乙酮及其类似物。
本发明的制备白藜芦醇中间体的多步骤反应见下图所示,其中所述的酚式羟基被乙酰基团保护。
因此,本发明提供一种制备如下式(I)所示结构的3,5-二乙酰氧基苯乙酮的方法:
其中R为具有1-10个碳原子的低级烷基基团,
所述的方法包括将二乙酰氧基苯甲酰氯在含铁催化剂存在下与格氏试剂反应。优选地,含铁的催化剂包括:三(乙酰丙酮)铁(III)、酞菁氯化铁、三(二苯甲酰甲基)铁、三(六氟乙酰丙酮)铁、无水氯化铁、二茂铁、三氟乙酰丙酮铁以及四苯基卟吩氯化铁。
在苯环的3-和5-位用于酚式羟基基团的保护基团的优选的基团是乙酰基,除此以外,也可以使用其它的酰基残基,例如丙酰基、丁酰基以及苯酰基,酚式羟基基团也可以用苄基进行保护。
基本上格氏反应可以用已知的方式进行,即使用格氏试剂。格氏试剂的通式为X-Mg-R,其中X选自氯、溴或碘,R是C1-C10的烷基。优选地,X是氯或溴,R是甲基或乙基。最优选地,X是氯,R是甲基。本反应最优选的是四氢呋喃(THF)。
本发明的反应是在约-70℃到约40℃的温度下进行的,优选在约-40℃到约25℃下进行。本领域的普通技术人员可以理解,反应温度越低,期望的产率越高。
可以工作的本发明的反应混合物可以通过已知的方法进行。本发明的反应混合物可以在多种淬火剂的作用下结束反应。本发明的反应混合物优选使用饱和的氯化铵水溶液或稀释的盐酸水溶液结束反应。
在反应混合物中,格氏试剂和酰氯的摩尔比大约为1∶10至大约2∶1,优选1∶2至1∶1。
在所述反应中,催化剂与酰基氯的混合物中,催化剂与酰基氯的摩尔比为含铁催化剂占酰基氯约10%到约0.5%。优选为约5%to 1%,更优选为3%。
具体实施方式
如下的实施例用以具体说明本发明,本领域的技术人员可以理解的是以下实施例仅仅用于阐明本发明的目的,而本发明请求保护的范围以权利要求书为准。
实施例1
步骤1:乙酰氧基苯甲酸
在一个带有磁搅拌子、温度计和冷凝器的100ml的三颈瓶中加入30g(0.195mol)3,5-二羟基苯甲酸,47ml(0.497mol)乙酸酐和2.4ml(29.8mmol)吡啶。加热混合物到100℃并持续搅拌3-4小时,然后冷却加入400ml冰水中,然后过滤,然后用冰水冲洗过滤饼,并在1毫巴的真空条件下在45℃干燥混合物,得到41g的3,5-二乙酰氧基苯甲酸,其为白色固体,产率88.4%。
步骤2:二乙酰氧基苯甲酰氯
在一个带有磁搅拌子、温度计和冷凝器的250ml的三颈瓶中加入15.4g(64.7mmol)3,5-二乙酰氧基苯甲酸,10ml亚硫酰氯和80ml二氯甲烷。混合物回流反应3-5小时,然后蒸馏出溶剂和残留的亚硫酰氯。另外加入新的二氯甲烷,再将其蒸馏出来。用120ml甲苯溶解粗产品并过滤溶液。蒸发掉溶剂,在1毫巴的真空条件下在室温干燥产品。得到16.3g的3,5-二乙酰氧基苯甲酰氯,其为白色固体,产率98.2%。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在室温下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率27%。
实施例2
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯、83mg(3mol%以酰基氯计算)的Fe(AcAc)3和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在表1所列的温度下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,结果见表1。
表1
实施例3
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,141mg(3mol%以酰基氯计算)的酞菁氯化铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率82.1%。
实施例4
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,169mg(3mol%以酰基氯计算)的三(二苯甲酰甲基)铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率87.0%。
实施例5
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,158mg(3mol%以酰基氯计算)的三(六氟乙酰丙酮)铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率77.5%。
实施例6
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,38mg(3mol%以酰基氯计算)的无水氯化铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率83.6%。
实施例7
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,44mg(3mol%以酰基氯计算)的二茂铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率67.5%。
实施例8
步骤1和2按照实施例1中相同的条件进行。
步骤3:3,5-二乙酰氧基苯乙酮
在氮气氛中,向一个带有磁搅拌子、温度计、滴液漏斗和冷凝器的100ml的三颈瓶中加入2g(7.8mmol)二乙酰氧基苯甲酰氯,120.5mg(3mol%以酰基氯计算)的三氟乙酰丙酮铁和15ml无水四氢呋喃。滴加甲基氯化镁2.6ml(3M在THF中)到溶液中,20分钟加完。反应混合物在-15℃下持续搅拌10分钟。使用氯化铵水溶液结束反应。混合物用乙酸乙酯萃取后,萃取物用硫酸镁干燥并浓缩。产物用气相色谱分析,产率87%。
Claims (6)
1.一种制备如下式(I)所示结构的酰基苯的方法,
其中R为具有1-10个碳原子的低级烷基基团,
包括将二乙酰氧基苯甲酰氯在含铁催化剂存在下与格氏试剂进行反应,并且所述的含铁催化剂是选自酞菁氯化铁、三(二苯甲酰甲基)铁、三(六氟-乙酰丙酮)铁、二茂铁或三氟乙酰丙酮铁的化合物。
2.如权利要求1所述的方法,其特征在于,所述的格氏反应试剂由X-Mg-R表示,其中X是氯、溴或碘,R是C1-C10的烷基。
3.如权利要求1所述的方法,其特征在于,所述的格氏反应试剂由X-Mg-R表示,其中X是氯、溴或碘,R是甲基。
4.如权利要求1-3中任意一项所述的方法,其特征在于,所述的反应是在70℃到40℃的温度下进行的。
5.如权利要求1-3中任意一项所述的方法,其特征在于,所述的格氏试剂与酰基氯的摩尔比为1:10到2:1。
6.如权利要求1-3中任意一项所述的方法,其特征在于,所述的催化剂与酰基氯的摩尔比为含铁催化剂占酰基氯10%到0.5%。
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3, 5-二羟基苯乙酮合成研究;陆振荣等;《陕西化工》;19980331;第30-31页 * |
Iron Catalyzed Cross-coupling Reactions of Acyl Chlorides with Grignard Reagents. A Mild, General, and Convenient Synthesis of Aliphatic and Aromatic Ketones;V. Fiandanese et al.,;《Tetrahedron Letters》;19841231;第25卷(第42期);第4805页倒数第2-5行,第4807页第3-10行,倒数第2-11行 * |
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