JP3146187B2 - Novel method for producing diphosphine oxide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel process for easily synthesizing a diphosphine oxide compound and a phosphine oxide compound which is an intermediate for producing the same. More specifically, the present invention provides a novel diphosphine oxide compound which is an intermediate for producing an important optically active phosphine compound constituting an excellent catalyst for an asymmetric synthesis reaction, and a novel method for easily synthesizing a phosphine oxide compound which is an intermediate for the production thereof. Related to manufacturing method.

[0002]

2. Description of the Related Art There have been many reports on transition metal complexes which can be used for asymmetric synthesis such as asymmetric hydrogenation, asymmetric isomerization, and asymmetric hydrosilylation. Above all, complexes in which an optically active tertiary phosphine compound is coordinated to a transition metal complex such as ruthenium, rhodium, iridium, and palladium are widely known as having excellent performance as a catalyst for an asymmetric synthesis reaction.

In order to further enhance the performance of these complexes as catalysts for asymmetric synthesis, a large number of phosphine compounds having various structures have been developed and reported so far (Chemical Review 32 Organometallic Complexes, edited by The Chemical Society of Japan). Chemistry "232-23
7, 1982) (by Ryoji Noyori, "Asymmetric Cataly"
sis In Organic Synthesis ", A Wiley-IntersciencePu
blication). Among these variously reported optically active phosphine compounds, particularly, 2,2′-bis (diphenylphosphino) -1,1′-binaphthyl (hereinafter referred to as “BI
"NAP". ) Is one of the excellent ligands for metal complexes, and rhodium complexes (JP-A-55-61973) and ruthenium complexes (JP-A-61-6390) using BINAP as a ligand are known. It has already been reported.

Heretofore, as a method for synthesizing the above BINAPs, racemic binaphthol has been brominated at a high temperature (240 ° C. to 320 ° C.) using triphenylphosphine-dibromide, and then diarylphosphinyl has been introduced to a digignard reagent. A method is known as an industrial method in which a diphosphine oxide compound is condensed with a chloride compound, and after optical resolution, a tertiary diphosphine compound (BINAPs) is obtained using a trichlorosilane reducing agent. (H.Takaya,
K.Mashima, K.Koyano, M.Yagi, H.Kumobayashi, T.Tak
etomi, S. Akutagawa, R. Noyori, J. Org. Chem., 1986
(Year, Vol. 51, p. 629) Another method for synthesizing a diphosphine compound is to reduce a substituted (2-nitrophenyl) diphenylphosphine oxide compound into a (2-aminophenyl) diphenylphosphine oxide compound,
Subsequently, diazotization and iodination are performed, and the compound having a substituent (2
A method is known in which a (iodophenyl) diphenylphosphine oxide compound is converted into a diphosphine oxide compound by dimerization in the presence of copper to obtain a diphosphine oxide compound, and after optical resolution, a tertiary diphosphine compound using a trichlorosilane reducing agent. (Japanese Unexamined Patent Publication No. 5-507503)

[0005] However, the synthesis of diphosphine compounds known in the past has some problems such as long production steps and low yields of the desired optically active diphosphine compound depending on the production intermediate. Regarding the synthesis of the diphosphine oxide compound as a production intermediate, the production process may be long depending on the production intermediate, and a method for easily producing the diphosphine oxide compound and the production intermediate is demanded.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a coordination for forming a metal complex catalyst having excellent performance such as chemoselectivity, enantioselectivity and catalytic activity in an asymmetric synthesis reaction, particularly an asymmetric hydrogenation reaction. To provide a novel method for producing a diphosphine oxide compound useful for easily producing a diphosphine oxide compound useful as an intermediate for producing a diphosphine compound useful as a child; and to provide a novel method for producing a phosphine oxide compound which is an intermediate for producing the diphosphine oxide compound. It is to provide a manufacturing method.

[0007]

That is, the first aspect of the present invention provides:
General formula (2):

Embedded image [In the formula, R ¹ is a cycloalkyl group, a phenyl group, a substituted phenyl group (the substituent is substituted with 1 to 5 substituents, and each substituent may be the same or different; a halogen atom,
A lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group, a halogenated lower alkyl group, and a phenyl group), a naphthyl group optionally substituted with a lower alkyl group or a lower alkoxyl group, Represents a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group, and R ⁴ represents a hydrogen atom, a halogen atom,
Represents a lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group, a halogenated lower alkyl group or a phenyl group. After treating the phosphine oxide compound represented by the formula (1) with a base, dimerization using an oxidizing agent,

General formula (1):

Embedded image (Wherein, R ¹ and R ⁴ represent the same as described above).

Further, the second invention provides a compound represented by the general formula (3):

Embedded image (Wherein, R ⁴ represents the same as described above, M represents magnesium or lithium, Y represents a halogen atom, and n represents 0 or 1).

General formula (4)

Embedded image (Wherein, R ¹ represents the same as described above), characterized by reacting a phosphinic acid chloride compound represented by the formula:

General formula (2):

Embedded image (Wherein, R ¹ and R ⁴ represent the same as described above).

Further, the third invention provides a compound represented by the following general formula (3)

Embedded image (In the formula, R ⁴ , M, Y, and n represent the same as described above.)
The compound represented by the general formula (5):

Embedded image (Wherein each R ⁵ independently represents an alkyl group or an unsubstituted or substituted phenyl group).

General formula (6):

Embedded image (Wherein, R ⁴ and R ⁵ represent the same as described above), and then a general formula (7): R ¹ MY _n (7) (where R ¹ , M, Y and n represent the same as described above.)
Characterized by successively reacting a Grignard compound or a lithium compound represented by

General formula (2):

Embedded image (Wherein, R ¹ and R ⁴ represent the same as described above).

In a fourth aspect of the present invention, there is provided the compound of the first aspect, wherein the base is a base selected from an organic lithium reagent such as lithium alkylamide, alkyllithium and allyllithium, and a Grignard reagent. This is a method for producing the diphosphine compound represented by (1).

Further, in the fifth invention, in the first or fourth invention, the oxidizing agent is a metal compound having an oxidizing property, and specifically, the metal compound is iron, copper, ruthenium, cobalt or the like. , Nickel, vanadium, molybdenum, manganese, titanium, or a metal complex or a metal complex compound, which is a method for producing a diphosphine compound represented by the general formula (1).

[0017]

Embedded image Or

Embedded image

That is, a phosphinic acid chloride compound represented by the formula (4) is reacted with a Grignard reagent or a lithium reagent represented by the formula (3) to obtain a phosphine oxide compound represented by the formula (2). A diphosphine oxide compound represented by the formula (1) by dimerizing the phosphine compound in the presence of an oxidizing agent, or a Grignard reagent or a lithium reagent represented by the general formula (3). The chlorophosphate compound represented by the formula (5) is reacted to give a phosphonate compound represented by the formula (6), and the phosphonate compound is reacted with a Grignard reagent or a lithium reagent represented by the formula (7) to obtain a compound represented by the formula ( 2)
And then dimerized in the presence of an oxidizing agent to produce a diphosphine oxide compound represented by the formula (1).

The diphosphine oxide compound represented by the above general formula (1) will be described more specifically.
About ¹ , a phenyl group;
p-tolyl, p-methoxyphenyl, p-trifluoromethylphenyl, p-fluorophenyl, p-dimethylaminophenyl, pt-butylphenyl, 3,5-dimethylphenyl, 3,5-di-t-butyl Phenyl,
3,4,5-trimethoxyphenyl, 3,5-dimethyl-4-methoxyphenyl, 3,5-di-t-butyl-4
-Methoxyphenyl, 3,5-ditrifluoromethylphenyl, 3,5-dichlorophenyl, 3,5-difluorophenyl, pentafluorophenyl, biphenyl and the like; cycloalkyl groups such as cyclohexyl and cyclopentyl; naphthyl groups , Α-naphthyl,
β-naphthyl, 6-methoxy-α-naphthyl, 6-methoxy-β-naphthyl and the like; pyridyl groups such as 2-pyridyl, 3-pyridyl and 4-pyridyl; quinolyl groups such as 2-quinolyl and 3- Quinolyl, 4-quinolyl and the like; isoquinolyl groups include 1-isoquinolyl, 3
-Isoquinolyl, 4-isoquinolyl and the like; furfuryl groups as 2-furfuryl and 3-furfuryl; benzofurfuryl groups as 2-benzofurfuryl and 3-
Benzofurfuryl and the like; thienyl groups include 2-thienyl and 3-thienyl; benzothienyl groups include 2-benzothienyl and 3-benzothienyl;

[0020]

R ⁴ is a hydrogen atom; a halogen atom is fluorine or chlorine; a lower alkyl group is methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, t-butyl or the like; Examples of the group include methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, t-
Butoxy and the like; di-lower alkylamino groups include dimethylamino, diethylamino, dipropylamino and diisopropylamino; halogenated lower alkyl groups include trifluoromethyl and the like; and phenyl groups.

Specific examples of the compound represented by the general formula (1) include (a) (6,6'-dimethoxybiphenyl-2,2 '
-(Diyl) bis (diphenylphosphine oxide), (b) ((5,6), (5 ', 6')-bis (methylenedioxy) biphenyl-2,2'-diyl) bis (diphenylphosphine oxide) ( Hereinafter, "SEGPHO
SO ”. (C) ((5,6), (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (3,5-dimethylphenyl) phosphine oxide), (D) (±)-((5,6), (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl)
Bis (bis (3,5-di-t-butyl-4-methoxyphenyl) phosphine oxide), (e) (±)-((5,6), (5 ′, 6 ′)-bis (methylenedioxy ) Biphenyl-2,2'-diyl)
Bis (bis (4-methoxyphenyl) phosphine oxide), (f) (±)-((5,6), (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl)
Bis (dicyclohexylphosphine oxide), (g) (±)-((5,6), (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl)
Compounds such as bis (bis (3,5-di-t-butylphenyl) phosphine oxide) are exemplified.

Each manufacturing process will be described in more detail.
The production of the phosphine oxide compound represented by the general formula (2) can be carried out by a method similar to a method known in, for example, JJ Monaglu et al., Journal of Organic Chemistry, 32, 2477 (1967). it can. More specifically, the general formula (8):

Embedded image (Wherein R ¹ represents the same as described above), which is obtained by treating a phosphinic acid compound represented by the following formula with thionyl chloride:
General formula (4):

Embedded image (Wherein R ¹ represents the same as described above), and a phosphinic acid chloride compound represented by the general formula (3):

Embedded image (In the formula, R ⁴ , M, Y, and n represent the same as described above.)
In a Grignard reagent or lithium reagent represented by the following tetrahydrofuran, dioxane, ether, toluene, dropped in a solution of hexane at 30 ~ 40 ℃, at room temperature 12 ~
It can be produced by reacting for 18 hours.
Each compound used in the synthesis is a compound that can be easily produced by a usual preparation method.

If necessary, the phosphine oxide compound can be produced by the general formula (6):

Embedded image (Wherein, R ⁴ and R ⁵ represent the same as described above) in a solution of a phosphonate compound represented by the following formula (7): R ¹ MYn (7) (7) In the formula, R ¹ , M, Y, and n represent the same as described above.)
Grignard compound or lithium compound represented by tetrahydrofuran, dioxane, ether, toluene,
The reaction can be carried out by dropping a hexane solution in an amount of 2 equivalents or more, preferably 2 to 3 equivalents, and reacting at room temperature for 12 to 18 hours.

The production of the phosphonate compound can be easily carried out by a method similar to a method known per se. For example, general formula (5):

Embedded image (Wherein, R ⁵ represents the same as described above) by converting a chlorophosphate compound represented by the general formula (3):

Embedded image (In the formula, R ⁴ , M, Y, and n represent the same as described above.)
In a Grignard reagent or lithium reagent represented by the following tetrahydrofuran, dioxane, ether, toluene, dropped in a solution of hexane at 30 ~ 40 ℃, at room temperature 12 ~
The reaction can be carried out for 18 hours.
Each compound used in these syntheses is a compound which can be easily produced by a usual preparation method.

In the present invention, the phosphine oxide compound represented by the general formula (2) is anionized in order to dimerize the phosphine oxide compound. The anion is adjusted by a method known per se. Can be implemented. For example, these phosphine oxide compounds are
A base selected from organic lithium reagents such as lithium alkylamide, alkyllithium, allyllithium and the like, and organic magnesium reagents such as Grignard reagent, preferably 1.2 to 2.0 equivalents or more, preferably lithium diethylamide, lithium diisopropylamide (Less than,
"LDA". ), Methyl lithium, butyl lithium, phenyl lithium, alkyl magnesium halide of C ₁ -C _5, unsubstituted or substituted phenyl magnesium halide, a base such as magnesium amide, more preferably a LDA, ethers, aliphatic or aromatic hydrocarbon Solvents such as a system solvent or a mixed solvent thereof, preferably tetrahydrofuran (hereinafter referred to as “THF”), dioxane, diethyl ether, toluene, hexane, heptane or a mixed solvent thereof, more preferably −5 in THF.
The reaction can be carried out at a temperature of at most -78 ° C, preferably from -78 ° C to -15 ° C.

The process for producing the diphosphine oxide compound represented by the general formula (1), which is the desired product, can be carried out as follows. That is, the oxidizing property of the anion solution prepared by the above method is 1 equivalent or more, preferably 1.2 to 2.0 equivalents (the number of equivalents may be the same as or different from the equivalent of the base). Metal compound and THF or a mixed solvent of THF and an aliphatic or aromatic hydrocarbon in a solvent of 50 ° C. or less, preferably −5 ° C.
It can be carried out by reacting at １５15 ° C. The reaction is carried out at a low temperature, if necessary, preferably at -78 ° C.
It can also be carried out at -40 ° C by adding the oxidizing agent directly to the anion solution. The oxidizing metal compound is selected from oxidizing compounds such as iron, copper, ruthenium, cobalt, nickel, vanadium, molybdenum, manganese, and titanium. Trivalent copper, trivalent ruthenium, trivalent cobalt, divalent nickel, tri-, tetra- or pentavalent vanadium, tri-, tetra- or hexavalent molybdenum, tri-, tetra-, penta- or hexavalent manganese; An oxidizing agent selected from metal salts or metal complex compounds of trivalent or tetravalent titanium, more preferably chlorides, bromides, iodides, nitrates, sulfates, perchlorates, acetates, oxalates of these metals, Acetylacetone complex,
Bipyridyl of these metal salts, phenanthrene complex, more preferably iron trichloride, iron tribromide, iron triiodide, copper dichloride,
Copper dibromide, copper diiodide and the like can be mentioned.

In order to avoid complication, among the compounds included in the present invention, ((5,6), (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl)
The following intermediate (9), which is a production intermediate useful for producing bis (diphenylphosphine) (hereinafter referred to as “SEGPHOS”):
(In the formula, Ph represents a phenyl group.)
A typical example of the method for producing a novel diphosphine oxide compound of the present invention will be described more specifically by taking the method for producing SO as an example. However, the present invention is not limited to this example.

Embedded image

First, 1 equivalent of a solution of 3,4-methylenedioxybromobenzene represented by the following formula (10) in tetrahydrofuran is added dropwise at 40 ° C. or less to a magnesium piece, and reacted at room temperature for 3 hours or more to give a Grignard reagent. Then, 1 equivalent of diphenylphosphinyl chloride is added dropwise at 40 ° C. or lower, and reacted at room temperature for 12 to 18 hours or more, and diphenyl (3,4-methylenedioxyphenyl) represented by the following formula (11) is obtained. Prepare phosphine oxide.

Embedded image

[0030]

Embedded image

The diphenyl (3,4-methylenedioxyphenyl) phosphine oxide represented by the general formula (11) can also be produced by the following method. That is, one equivalent of 3,4-
A tetrahydrofuran solution of methylenedioxybromobenzene (10) is added dropwise at a temperature of 40 ° C. or less, and reacted at room temperature for 3 hours or more to obtain a Grignard reagent. This is added dropwise to a solution of 1 equivalent of diphenylphosphoryl chloride in a tetrahydrofuran at 0 ° C. or less, The reaction is carried out at room temperature for at least 12 to 18 hours to prepare diphenyl (3,4-methylenedioxyphenyl) phosphonate represented by the following formula (12). Subsequently, a solution of 2.5 equivalents of phenylmagnesium bromide in tetrahydrofuran was added dropwise to the compound at 5 ° C. or lower, and reacted at room temperature for 12 to 18 hours or longer to obtain diphenyl (3,4-methylenedioxyphenyl) phosphine oxide (11 ) Is prepared.

Embedded image

Next, the phosphine oxide (11)
Is dissolved in THF, and a solution of 1.2 equivalents of lithium diisopropylamide in THF is reacted at -15 ° C. next,
The reaction solution was treated with 1.2 equivalents of iron trichloride (anhydride) in TH.
The desired SE by reacting with F suspension solution at 3 ℃
GPHOSO can be manufactured with high efficiency.

[0033]

According to the production method of the present invention, a diphosphine oxide compound represented by the above general formula (1) and a phosphine oxide compound represented by the above general formula (2), which is an intermediate for producing the same, can be easily produced. Especially SE
It is extremely useful industrially as a method for producing a synthetic intermediate of GPHOS.

[0034]

The present invention will be described in detail below with reference to examples and use examples, but the present invention is not limited to these examples. In addition, the apparatus used for the measurement of the physical property in each Example is as follows. Nuclear Magnetic Resonance ¹ H NMR Bruker AM400 (400 MHz) ³¹ P NMR Bruker AM400 (162 MHz) Melting point Yanaco MP-500D Optical rotation JASCO DIP-4 Gas chromatography-GLC Hewlett Packard 5890-II High-performance liquid chromatography HPLC 10A Shimadzu PD LCA Shimadzu & LC MASS Hitachi M-80B

Example 1 Synthesis of diphenyl (3,4-methylenedioxyphenyl) phosphine oxide (1) 12.4 g (511 mmol) of magnesium pieces were weighed and placed in a four-necked flask, and a thermometer, a cooling tube, The inside of the reaction vessel equipped with a dropping funnel with a pressure tube was completely replaced with nitrogen, and anhydrous T
30 ml of HF were added. While stirring with water cooling, add 3,4
-Methylenedioxybromobenzene (93.6 g, 46
5 mmol) (manufactured by Tokyo Kasei Co., Ltd.) in 200 ml of THF solution
Was added dropwise over 2.5 hours, and stirring was further continued at room temperature for 3 hours. To the resulting mixed solution, 100 g (423 mmol) of diphenylphosphonic chloride was added dropwise over 2 hours while stirring with water cooling, and stirring was continued at room temperature for 15 hours. Then, add 30 ml of water under ice-cooling and stir for 30 minutes.
150 ml of N hydrochloric acid was added and the mixture was stirred for 1.5 hours. The reaction product was extracted with 300 ml of ethyl acetate,
ml, saturated sodium bicarbonate solution 150 ml, water 15
After washing in order of 0 ml, the solvent was distilled off under reduced pressure. The obtained crystals were dissolved by heating in 150 ml of toluene, and then -5
Recrystallization at C gave 127 g of the title compound.

Mp: 127-128 ° C. ¹ H-NMR (CDCl ₃ ): δ 6.01 (2H,
s), 6.88 (1H, dd, J = 10.3, 2.4H)
z), 7.08 (1H, dd, J = 10.0 Hz),
7.18 (1H, ddd, J = 13.5, 10.3,
2.4 Hz), 7.43-7.48 (4H, m), 7.
51 (2H, m), 7.64-7.70 (4H, m) ³¹ P-NMR (CDCl ₃ ): δ 29.8

Example 2 Synthesis of diphenyl (3,4-methylenedioxyphenyl) phosphonate Under a nitrogen stream, magnesium 51 g (2.10 mol),
While THF (100 ml) and iodine (catalytic amount) were added and stirred, 3,4-methylenedioxybromobenzene 4 was added.
A small amount of a solution of 05.9 g (2.02 mol) in THF (2 L) was added to confirm the formation of the Grignard reagent, and then the dropwise addition was continued while maintaining the reaction temperature at 25 to 30 ° C. After stirring at room temperature overnight, the resulting Grignard reagent was added to 580 g of diphenylphosphoryl chloride cooled to -5 ° C.
(2.05 mol) in a THF (1 L) solution. After stirring at room temperature overnight, THF was distilled off under reduced pressure, and ethyl acetate (3 L) and 1N hydrochloric acid (1.5 L) were added and stirred.
The organic layer was separated, washed with water and a saturated aqueous solution of sodium hydrogen carbonate, dried over magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain a crude product (746.48 g). The crude product was recrystallized from ethyl acetate to obtain 574.9 g of the title compound.

Yield 80% mp: 55.5 ° C. ¹ H-NMR (CDCl ₃ ): δ 6.04 (2H,
s), 6.90 (1H, dd, J = 7.8, 3.9H)
z), 7.12-7.20 (5H, m), 7.27-
7.31 (4H, m), 7.35 (1H, dd, J = 1
3.6, 1.3 Hz), 7.52 (1H, ddd, J =
14.7, 8.0, 1.5 Hz) ³¹ P-NMR (CDCl ₃ ): δ12.5

Example 3 Synthesis of diphenyl (3,4-methylenedioxyphenyl) phosphine oxide (2) 15.18 g of Mg (0.624) was placed in a 1 L four-necked flask.
mol), and the inside is replaced with nitrogen. Distillation T
After adding 20 ml of HF, 98.60 g of bromobenzene is added.
(0.628 mol) of THF (300 ml) was added in a small amount and stirred vigorously. After confirming the formation of the Grignard reagent by increasing the temperature of the reaction solution, the internal temperature of the previous solution was reduced to 4%.
The solution was added dropwise over about 3 hours so as to maintain the temperature in the range of about 5 to 50 ° C., and further stirred at room temperature for 3 hours. Next, 100.73 g (0.284 mol) of diphenyl (3,4-methylenedioxyphenyl) phosphonate in 300 m of THF.
The 1 solution was added dropwise to the Grignard reagent prepared above over 1 hour while cooling in an ice bath. (At this time, the internal temperature was constant at 5 ° C.) The stirring was continued at room temperature overnight. 30 ml of water was added to the reaction solution, and the mixture was stirred for about 30 minutes to decompose excess Grignard reagent to stop the reaction, and THF was distilled off under reduced pressure. 500m of toluene in the concentrated reaction solution
Then, 500 ml of a 10% aqueous hydrochloric acid solution was added, and the mixture was stirred at room temperature for 30 minutes, and then an organic layer and an aqueous layer were separated. The same operation was performed again to separate the organic layer and the aqueous layer. Then, the aqueous sodium hydroxide solution (sodium hydroxide 40 g, water 500 m
After l) was added and the mixture was stirred at room temperature for 1 hour, a separation and separation operation was performed. After performing the same operation again, washing was performed three times using 400 ml of an aqueous sodium chloride solution each time, followed by drying over magnesium sulfate, and distilling off the solvent under reduced pressure.
120.37 g of e-diphenyl (3,4-methylenedioxyphenyl) phosphine oxide was obtained. 200 ml of toluene was added to the crude body, dissolved by heating, and left at 5 ° C. overnight. The precipitated crystals were collected by filtration and dried under reduced pressure to obtain 80.5 g of diphenyl (3,4-methylenedioxyphenyl) phosphine oxide.

Yield 88% mp: 127-128 ° C. ¹ H-NMR (CDCl ₃ ): δ 6.01 (2H,
s), 6.88 (1H, dd, J = 10.3, 2.4H)
z), 7.08 (1H, dd, J = 10.0 Hz),
7.18 (1H, ddd, J = 13.5, 10.3,
2.4 Hz), 7.43-7.48 (4H, m), 7.
51 (2H, m), 7.64-7.70 (4H, m) ³¹ P-NMR (CDCl ₃ ): δ 29.8

[Embodiment 4] (5, 6), (5 ', 6')
Synthesis of -bis (methylenedioxy) biphenyl-2,2'-diyl) bis (diphenylphosphine oxide) After replacing the inside of a 1 L four-necked flask with nitrogen, 40 ml (0.28 mol) of diisopropylamine and TH
200 ml of F was added. Cooled with ice-salt (internal temperature is -5 ° C
Becomes ) 1.7 M n-butyllithium solution 175
ml (0.279 mol) was added dropwise over 30 minutes (0 to 5
Exothermed to ° C. ) And further stirred at −5 ° C. for approximately 2 hours. Thereafter, the mixture is cooled to -15 ° C with acetone-dry ice (the internal temperature becomes -12 to -10 ° C), and 75.22 g (0.233 mol) of diphenyl (3,4-methylenedioxyphenyl) phosphine oxide is added. THF300
The mL solution was added dropwise over 15 minutes. At this time, the internal temperature is -10
Keep at ~ -5 ° C. The mixture was further stirred at −12 ° C. for 15 minutes to prepare a lithium reagent. On the other hand, after replacing the inside of the 3 L four-necked flask with nitrogen, ferric chloride (anhydride) 4
5.79 g (0.282 mol) was weighed, 150 ml of toluene was added, and the mixture was cooled with ice-water (internal temperature was 5 ° C.).
Becomes ) 150 mL of THF was added. At this time, heat was generated and the internal temperature rose to about 20 ° C. Ice-water under 3
After stirring for 0 minutes, the lithium reagent prepared above was added by a cannula for 30 minutes (the internal temperature rose to 8 to 10 ° C.), followed by stirring at room temperature overnight, and after confirming the completion of the reaction by HPLC, THF was added. Was distilled off under reduced pressure, and the reaction was stopped by adding 500 ml of a 10% hydrochloric acid aqueous solution and 500 ml of methylene chloride. After stirring for about 1 hour, the organic layer was separated from the aqueous layer, and the aqueous layer was re-extracted with 300 ml of methylene chloride. After mixing both organic layers, 10% hydrochloric acid aqueous solution 1L × 3 times, water 500
After washing 2 x 2 ml and drying over magnesium sulfate,
The solvent was distilled off under reduced pressure to obtain 84.25 g of a crude compound. 200 ml of ethyl acetate was added to the cude body, and dissolved by heating. After cooling to room temperature, seeds were added and the mixture was allowed to stand at 5 ° C. overnight. The precipitated crystals were collected by filtration and dried under reduced pressure to obtain 56.08 g of the title compound.

Yield 74.8% mp: 230-232 ° C. ¹ H-NMR (CDCl ₃ ): δ 5.26 (2H, d,
J = 1.5 Hz), 5.72 (2H, d, J = 1.6H)
z), 6.65 (2H, dd, J = 8.1, 2.1H
z), 6.77 (2H, dd, J = 14.1, 8.1H
z), 7.28-7.72 (20H, m) ³¹ P-NMR (CDCl ₃ ): δ 12.6

Example 5 Synthesis of bis (3,5-dimethylphenyl) (3,4-methylenedioxyphenyl) phosphine oxide In a 1 L four-necked flask, 26.74 g (1.10 m) of Mg was added.
ol) and I ₂ (catalyst amount) were measured and the inside was replaced with nitrogen. After adding 20 ml of distilled THF, 1-bromo-
19,41 g of 3,5-dimethylbenzene (1.05 m
ol) in 1000 ml of THF and added vigorously. After confirming the generation of the Grignard reagent by raising the temperature of the reaction solution, the above solution was added dropwise so that the internal temperature was about 25 to 30 ° C. The mixture was further stirred at room temperature overnight. Next, 117.25 g (0.50 mol) of diphenyl (3,4-methylenedioxyphenyl) phosphonate in THF500
ml solution was added to the Grignard reagent prepared above at an internal temperature of 2
The mixture was added dropwise at about 5 to 30 ° C, and further stirred at room temperature overnight. After adding 30 ml of water to the reaction solution and stirring for about 30 minutes, the excess Grignard reagent was decomposed to stop the reaction, and THF was distilled off under reduced pressure. To the concentrated reaction solution, add 2,000 ml of toluene and
After adding 50 ml and stirring at room temperature for 30 minutes, the organic layer and the aqueous layer were separated, and the same operation was performed again. After separating the organic layer and the aqueous layer, a 2.4 N aqueous sodium hydroxide solution (5
(00 ml) and stirred at room temperature for 1 hour, followed by separation and separation. After performing the same operation again, using 400 ml of an aqueous solution of sodium chloride once, washing with an aqueous solution of sodium chloride three times, drying over magnesium sulfate, distilling off the solvent under reduced pressure, and twice from butyl acetate. Recrystallization afforded 131.83 g of the title compound.

Yield 70% mp: 154-155 ° C. ¹ H-NMR (CDCl ₃ ): δ 2.32 (12H,
s), 6.02 (2H, s), 6.88 (1H, dd,
J = 7.9, 2.3 Hz), 7.07 (1H, dd, J
= 11.3, 1.4 Hz), 7.19 (2H, bs),
7.20-7.21 (1H, m), 7.25-7.28
(4H, m) ³¹ P-NMR (CDCl ₃ ): δ30.3

[Embodiment 6] (±)-((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (3,5-dimethylphenyl) phosphine oxide) The inside of a four-necked flask was replaced with nitrogen. Thereafter, 10.8 ml (82 mmol) of diisopropylamine and THF1
10 ml was added. 55 ml of a 1.5 M n-butyllithium solution under cooling with ice-salt (the internal temperature becomes −5 ° C.)
(0.82 mmol) was added dropwise over 30 minutes (heat was generated to 0 to 5 ° C), and the mixture was further stirred at -5 ° C for about 2 hours.
Then, after cooling to −15 ° C. with acetone-dry ice (the internal temperature becomes −12 to −10 ° C.), the bis (3,
25.0 g (66 mmol) of 5-dimethylphenyl) (3,4-methylenedioxyphenyl) phosphine oxide
A solution of l) in 175 ml of THF was added dropwise over 15 minutes. At this time, the internal temperature is kept at -10 to -5C. The mixture was further stirred at −12 ° C. for 45 minutes to prepare a lithium reagent. On the other hand, after replacing the inside of the four-necked flask with nitrogen, 13.41 g (83 mmol) of ferric chloride (anhydride) was weighed out, and then 40 ml of toluene was added. Next, 40 ml of THF was added under cooling with ice-water (the internal temperature was 5 ° C.). After stirring for about 30 minutes under ice-water, the lithium reagent prepared above was added via cannula. (The internal temperature was raised to 8 to 10 ° C.) Thereafter, the mixture was stirred at room temperature for 1 hour, and after completion of the reaction was confirmed by HPLC, THF was distilled off under reduced pressure.
The reaction was stopped by adding 300 ml of an aqueous hydrochloric acid solution and 300 ml of methylene chloride. After stirring for about 1 hour, the organic layer was separated from the aqueous layer, and the aqueous layer was re-extracted with 100 ml of methylene chloride. After mixing both organic layers, washing was repeated three times using 300 ml of a 10% hydrochloric acid aqueous solution each time, followed by washing twice with 300 ml of water, followed by drying with magnesium sulfate, and the solvent was distilled off under reduced pressure. 80 ml of acetonitrile was added to the residue, and the mixture was stirred at 50 ° C., and the resulting precipitate was collected by filtration to give the title compound 1
9.2 g were obtained.

Yield 77% mp: 256-258 ° C. ¹ H-NMR (CDCl ₃ ): δ 2.11 (12H,
s), 2.30 (12H, s), 5.43 (2H, d,
J = 1.6 Hz), 5.77 (2H, d, J = 1.6H)
z), 6.65 (2H, dd, J = 8.1, 2.0H
z), 6.92 (2H, dd, J = 14.0, 8.1H
z), 6.95 (2H, s), 7.09 (2H, s),
7.14 (4H, d, J = 12.2 Hz), 7.37
(4H, d, J = 12.1 Hz) ³¹ P-NMR (CDCl ₃ ): δ30.5

Example 7 Synthesis of bis (3,5-di-tert-butyl-4-methoxyphenyl) (3,4-methylenedioxyphenyl) phosphine oxide The inside of a 1 L three-necked flask was flushed with nitrogen. After the replacement, 8.05 g (0.33 mol) of magnesium and 20 m of THF were added.
1 was added. After adding a small amount of iodine and stirring vigorously to activate magnesium, 1-bromo-4-methoxy-
89.85 g of 3,5-di-t-butylbenzene (0.3
0 mol) in 200 ml of THF at 35-45 ° C.
After dropping over 30 minutes, the mixture was stirred and reacted at room temperature for 3 hours. Next, 50.67 g of diphenyl (3,4-methylenedioxyphenyl) phosphonate (0.14 g) was added under ice cooling.
mol) in 160 ml of THF for 30 minutes, and the mixture was stirred and reacted at room temperature overnight. After THF was distilled off under reduced pressure, 400 ml of methylene chloride was added, and 40 ml of 1.2N aqueous hydrochloric acid was added.
2 times with 0 ml, 300 ml of 2N aqueous sodium hydroxide solution
After washing twice with 300 ml of water and drying with magnesium sulfate, the solvent was distilled off under reduced pressure to obtain a crude compound 9
3.55 g were obtained. The title compound 73.6 was obtained by recrystallizing the crude compound from hexane-ethyl acetate.
1 g was obtained.

Yield 85% mp: 163-165 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.34 (36H,
s), 3.68 (6H, s), 6.02 (2H, s),
6.89 (1H, dd, J = 6.7, 3.3 Hz),
6.90-7.26 (6H, m) ³¹ P-NMR (CDCl ₃ ): δ 31.9

Embodiment 8 (±) − ((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (3,5-di-t-butyl-4-methoxyphenyl) phosphine oxide) After replacing the inside of the head flask with nitrogen, 24 ml (0.17 mol) of diisopropylamine and TH
Add 120 ml of F. Under cooling with ice-salt (-5 to 0 ° C), 98 ml of 1.6 M n-butyllithium (0.16
mol) was added dropwise over 50 minutes, and the mixture was further stirred for 2 hours. Cool to −20 ° C. with acetone-dry ice, and add bis (3,5-di-t-butyl-4-methoxyphenyl)
65,00 g (0.11 mol) of (3,4-methylenedioxyphenyl) phosphine oxide in THF260m
The L solution was added dropwise over 11 minutes, and the mixture was further stirred at -12 ° C for 30 minutes to prepare a lithium reagent. On the other hand, after the inside of the 2 L three-necked flask was replaced with nitrogen, 26.73 g (0.17 mol) of ferric chloride (anhydride) was weighed, 78 ml of toluene was added, and 78 mL of THF was added while cooling with ice-water. . After stirring for about 30 minutes, the lithium reagent prepared above was added by a cannula for 17 minutes, and the mixture was stirred and reacted at room temperature overnight. After THF was distilled off under reduced pressure, 350 ml of methylene chloride was added. The organic layer was washed three times with 300 ml of a 20% hydrochloric acid aqueous solution and three times with 300 ml of water, and then washed.
After drying over magnesium sulfate, the solvent was distilled off under reduced pressure,
73.85 g of a crude compound was obtained. Recrystallization from toluene-hexane gave 51.59 g of the title compound.

Yield: 76% mp: 154 ° -157 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.31 (36H,
s), 1.34 (36H, s), 3.65 (6H,
s), 3.67 (6H, s), 5.15 (2H, d, J
= 1.7 Hz), 5.72 (2H, d, J = 1.7H)
z), 6.69 (2H, d, J = 1.8 Hz), 7.1
6-18 (2H, m), 7.44 (4H, d, J = 1
2.2Hz), 7.59 (4H, d, J = 12.7H)
z) ³¹ P-NMR (CDCl ₃ ): δ30.2

Example 9 Synthesis of bis (4-t-butylphenyl) (3,4-methylenedioxyphenyl) phosphine oxide After replacing the inside of a 1 L three-necked flask with nitrogen, 8.39 g of magnesium was obtained. (0.35mol), THF20m
1 was weighed out. After adding a small amount of iodine and stirring vigorously to activate magnesium, 66.24 g (0.31 mol) of 1-bromo-4-t-butylbenzene in THF was added.
210 ml solution was added dropwise at 30-45 ° C. over 2 hours,
The reaction was stirred overnight at room temperature. Next, diphenyl (3,4-methylenedioxyphenyl) phosphonate 5 under ice cooling
A solution of 0.01 g (0.14 mol) in 200 ml of THF was added dropwise over 35 minutes, and the mixture was stirred and reacted at room temperature for 4 hours. T
After HF was distilled off under reduced pressure, 500 ml of toluene was added, and the mixture was washed twice with 300 ml of a 2N aqueous hydrochloric acid solution, twice with 300 ml of a 2N aqueous sodium hydroxide solution, twice with 200 ml of water, dried over magnesium sulfate, and then dried under reduced pressure. The solvent was distilled off to obtain a crude product. Crystals precipitated during the washing, which were also collected by filtration. The mixture was mixed to obtain 68.9 g of a crude body. The crude compound was washed by heating and stirring twice in methanol to give the title compound 54.2.
1 g was obtained.

Yield 89% mp: 245-248 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.31 (18H,
s), 6.01 (2H, s), 6.89 (1H, dd,
J = 7.9, 2.4 Hz), 6.89 (1H, dd, J
= 11.4, 1.3 Hz), 7.21 (1H, ddd,
J = 12.5, 7.9, 1.4 Hz), 7.44-7.
48 (4H, m), 7.56-7.61 (4H, m) ³¹ P-NMR (CDCl ₃ ): δ 29.6

Example 10 (±) − ((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (4-t-butylphenyl) phosphine oxide) The interior of a 1 L three-necked flask was flushed with nitrogen. After substitution, 25 ml (0.178 mol) of diisopropylamine and T
125 ml of HF were added. While cooling with ice-salt (−5 to 0 ° C.), 110 ml of 1.6 M n-butyllithium (0.1 ml) was used.
76 mol) was added dropwise over 35 minutes, and the mixture was further stirred for 1 hour. Next, bis (4-t-butylphenyl) (3,4-methylenedioxyphenyl) phosphine oxide 50.0%
After cooling 1 g (0.12 mol) of a 400 mL solution of THF to −20 ° C. in an acetone-dry ice bath, the above-prepared LDA was added dropwise over 8 minutes, and further added at −15 ° C.
Stirred for 0 minutes. On the other hand, after replacing the inside of the 2 L three-necked flask with nitrogen, 60 mL of toluene was taken. 28.24 g (0.17 mol) of ferric chloride (anhydride) was weighed out and added to toluene. Next, THF60 under cooling with ice-water
mL was added. At this time, fever was observed. After stirring for about 30 minutes, the lithium reagent prepared above was added by a cannula for 15 minutes, and the mixture was stirred and reacted at room temperature for 4 hours.
After THF was distilled off under reduced pressure, 500 ml of methylene chloride was added.
Was added. The organic layer was washed with a 20% hydrochloric acid aqueous solution (500 ml × 2 times) and water (400 ml × 3 times), dried over magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain a crude compound 57.3.
5 g were obtained. Recrystallize from ethyl acetate-hexane,
38.9 g of the title compound were obtained.

Yield 76% mp: 203-205 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.22 (18H,
s), 1.32 (18H, s), 5.24 (2H, d,
J = 1.6 Hz), 5.67 (2H, d, J = 1.5H)
z), 6.60 (2H, dd, J = 8.1, 1.9H)
z), 6.60 (2H, dd, J = 14.1, 8.1H
z), 7.28 (4H, dd, J = 8.6, 2.7H
z), 7.43 (4H, dd, J = 8.6, 2.7H
z), 7.60-7.71 (8H, m) ³¹ P-NMR (CDCl ₃ ): δ29.5

Example 11 Synthesis of bis (4-methoxyphenyl) (3,4-methylenedioxyphenyl) phosphine oxide After replacing the inside of a 1-L three-necked flask with nitrogen, magnesium 9.76 (0 .41 mol), THF 10 ml
Was measured. After activating magnesium with a small amount of dibromoethane, 43.5 ml (0.36 mol) of 3,4-methylenedioxybromobenzene in THF was cooled with ice.
A 110 ml solution was added dropwise over 2 hours, followed by a stirring reaction at room temperature for 1 hour 30 minutes. Then, under water cooling, TH of 106 g (0.36 mol) of bisanisylphosphinic chloride was added.
A 100 ml solution of F was added dropwise over 1 hour, and the mixture was stirred and reacted at room temperature overnight. After the THF was distilled off under reduced pressure, 300 ml of methylene chloride was added, and 300 ml of a 1.2N aqueous hydrochloric acid solution × 3.
Wash twice with saturated aqueous sodium hydrogencarbonate solution 300 × 2 times and water 300 ml × 2 times, dry with magnesium sulfate, and distill off methylene chloride under reduced pressure to obtain 130.7 g (oil) of the title compound. .

Yield 96% ¹ H-NMR (CDCl ₃ ): δ 3.84 (6H,
s), 6.01 (2H, s), 6.86 (1H, dd,
J = 8.0, 2.4 Hz), 7.06 (1H, dd, J
= 11.6, 1.3 Hz), 7.16 (1H, ddd,
J = 12.6, 7.9, 1.5 Hz), 6.93-6.
98 (4H, m), 7.53-7.60 (4H, m) ³¹ P-NMR (CDCl ₃ ): δ 29.5

Embodiment 12 (±) − ((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (4-methoxyphenyl) phosphine oxide) The inside of a 2 L three-necked flask was replaced with nitrogen. After that, 101 ml (0.72 mol) of diisopropylamine and T
750 ml of HF was added. Under cooling with ice-salt (−5 to 0 ° C.), 450 ml of 1.6 M n-butyllithium (0.7 ml)
2 mol) was added dropwise over 40 minutes, and the mixture was further stirred for 3 hours.
Next, 130.7 g of bis (4-methoxyphenyl) (3,4-methylenedioxyphenyl) phosphine oxide
(0.36 mol) in THF 650 ml was cooled to −40 ° C. in an acetone-dry ice bath, and then LD
A was added dropwise over 20 minutes, and the mixture was further stirred at -35 ° C for 1 hour. On the other hand, after replacing the inside of the 3 L three-necked flask with nitrogen, 118.25 g of ferric chloride (anhydride) (0.72 m
ol) and 350 ml of toluene were weighed, and 350 ml of THF was added under ice-water cooling. After stirring for about 30 minutes, a lithium reagent was added by a cannula for 20 minutes, and the mixture was stirred and reacted at room temperature overnight. After THF was distilled off under reduced pressure, 1500 ml of methylene chloride was added. The organic layer was washed four times with a 1.2N aqueous hydrochloric acid solution (1,000 ml) and water (100).
After washing with 0 ml × 3 times and drying with magnesium sulfate, the solvent was distilled off under reduced pressure to obtain 155 g of a crude compound. Recrystallization from methanol gave the title compound.
01 g was obtained.

Yield 86% mp: 122-124 ° C. ¹ H-NMR (CDCl ₃ ): δ 3.76 (6H,
s), 3.82 (6H, s), 5.44 (2H, d, J
= 1.6 Hz), 5.77 (2H, d, J = 1.5H)
z), 6.66 (2H, dd, J = 8.1, 2.0H
z), 6.73-6.77 (4H, m), 7.79 (2
H, dd, J = 14.0, 8.1 Hz), 6.89−
6.93 (4H, m), 7.43-7.50 (4H,
m), 7.58-7.64 (4H, m) ³¹ P-NMR (CDCl ₃ ): δ 29.5

Example 13 Dicyclohexyl ((3,
4) Synthesis of -methylenedioxyphenyl) phosphine oxide After replacing the inside of a 1 L three-necked flask with nitrogen, 6.34 g (0.26 mol) of magnesium and 20 ml of THF
Was measured. After activating magnesium with a small amount of dibromoethane, a solution of 30 ml (0.25 mol) of bromethylenedioxybenzene and 120 ml of THF was added dropwise over 1 hour and 45 minutes under ice-cooling, followed by a stirring reaction at room temperature for 3 hours. Then, a solution of 64 g (0.26 mol) of biscyclohexylphosphinic chloride and 240 ml of THF was added to 1 solution.
The mixture was added dropwise over time, and the mixture was stirred and reacted at room temperature overnight. The THF was distilled off under reduced pressure, 400 ml of toluene was added, and the mixture was washed with 300 ml of 1.2 N hydrochloric acid aqueous solution x 3 times, 300 ml of saturated aqueous sodium hydrogen carbonate solution twice and 300 ml of water twice, dried over magnesium sulfate, and then dried under reduced pressure. Then, toluene was distilled off to obtain 94.38 g of a crude form. Recrystallization from toluene-hexane gave 67.19 g of the title compound.

Yield 82% mp: 138-141 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.17-1.32
(10H, m), 1.60-1.70 (4H, m),
1.74-1.84 (4H, m), 1.96-2.03
(4H, m), 6.03 (2H, s), 6.91 (1
H, dd, J = 8.0, 2.0 Hz), 6.06 (1
H, dd, J = 9.2, 1.1 Hz), 7.19 (1
H, ddd, J = 10.3, 7.9, 1.5 Hz) ³¹ P-NMR (CDCl ₃ ): δ46.0

Embodiment 14 (±) − ((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (dicyclohexylphosphine oxide) After replacing the inside of a 1 L three-necked flask with nitrogen, 50 ml of diisopropylamine ( 0.36 mol) and TH
Add 300 ml of F. Under cooling with ice-salt (−5 to 0 ° C.), 226 ml of 1.6 M n-butyllithium (0.
36 mol) was added dropwise over 1 hour and 30 minutes, and the mixture was further stirred for 1 hour. Next, 60.27 g of dicyclohexyl ((3,4) -methylenedioxyphenyl) phosphine oxide
(0.18 mol) of THF (300 ml) was cooled to −40 ° C. in an acetone-dry ice bath, and then LD
A was added dropwise over 8 minutes, and the mixture was further stirred at -35 ° C for 1 hour. On the other hand, after the inside of the 3 L three-necked flask was replaced with nitrogen, 58.69 g of ferric chloride (anhydride) (0.36 mol
1) Weigh out and cool with ice-water 150 ml of toluene,
150 ml of THF was added. After stirring for about 30 minutes, a lithium reagent was added via a cannula for 15 minutes, and the mixture was stirred and reacted at room temperature overnight. After THF was distilled off under reduced pressure, 1500 ml of methylene chloride was added. The organic layer was washed four times with a 1.2N aqueous hydrochloric acid solution (1,000 ml) and water (100).
After washing with 0 ml × 3 times and drying over magnesium sulfate, the solvent was distilled off under reduced pressure, and the residue was recrystallized from methanol to obtain 35 g of the title compound.

Yield 65% mp: 270 ° C. (decomposition) ¹ H-NMR (CDCl ₃ ): δ1.12-1.49
(20H, m), 1.67-1.80 (16H, m),
1.94-1.97 (8H, m), 5.85 (2H,
d, J = 1.7 Hz), 5.98 (2H, d, J = 1.
6Hz), 6.81 (2H, dd, J = 8.1, 3.0)
Hz), 6.85 (2H, dd, J = 10.2, 7.7)
Hz) ³¹ P-NMR (CDCl ₃ ): δ46.3

Example 15 Synthesis of bis (3,5-di-t-butylphenyl) ((3,4) -methylenedioxyphenyl) phosphine oxide After the inside of a three-necked flask was replaced with nitrogen, Magnesium 2.27g (0.094mol), THF 10ml
Was measured. After adding a small amount of iodine and stirring vigorously to activate magnesium, 1-bromo-3,5-di-
23.04 g (0.085 mol) of t-butylbenzene
Was added dropwise at 30 to 45 ° C. over 1 hour and 25 minutes, and reacted at room temperature for 6 hours. next,
Under ice cooling, diphenyl (3,4-methylenedioxyphenyl) phosphonate (14.4 g, 0.041 mol) of T
After dropping a 60 ml HF solution over 1 hour, the mixture was stirred and reacted at room temperature overnight. After distilling off THF under reduced pressure, toluene 2
2 ml of 2N hydrochloric acid aqueous solution 100 ml × 2 times
N sodium hydroxide aqueous solution 100 ml x 2 times and water 10
After washing with 0 ml × 2 times and drying over magnesium sulfate, the solvent was distilled off under reduced pressure to obtain a crude target product. The title compound 1 was obtained by recrystallization from toluene-hexane.
8.03 g were obtained.

Yield 72% mp: 146-149 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.27 (36H,
s), 6.01 (2H, s), 6.88 (1H, dd,
J = 7.9, 2.3 Hz), 7.10 (1H, dd, J
= 11.3, 1.5 Hz), 7.17 (1H, ddd,
J = 12.3, 7.9, 1.5 Hz), 7.48 (4
H, dd, J = 12.8, 1.8 Hz), 7.56-
7.58 (2H, m) ³¹ P-NMR (CDCl ₃ ): δ32.0

[Embodiment 16] (±) − ((5, 6),
Synthesis of (5 ′, 6 ′)-bis (methylenedioxy) biphenyl-2,2′-diyl) bis (bis (3,5-di-t-butylphenyl) phosphine oxide) After replacing with nitrogen, 7.4 ml (0.053 mol) of diisopropylamine and THF
Add 40 ml. While cooling with ice-salt (−5 to 0 ° C.)
33 ml of 1.6 M n-butyllithium (0.052
mol) was added dropwise over 14 minutes and stirred for a further 3 hours. Next, bis (3,5 di-t-butylphenyl) ((3, 4)
-Methylenedioxyphenyl) phosphine oxide 15
g (0.026 mol) in THF (120 mL) was cooled to −40 ° C. in an acetone-dry ice bath, and the LDA prepared above was added dropwise, followed by stirring at −30 ° C. for 1 hour. On the other hand, after replacing the inside of the three-necked flask with nitrogen,
30 mL of toluene was placed in the flask. 8.32 g (0.051 mol) of ferric chloride (anhydride) was weighed out and added to toluene. Then, while cooling with ice-water, THF30
mL was added. After stirring for about 10 minutes, the lithium reagent prepared above was added by a cannula for 10 minutes, and the mixture was stirred and reacted at room temperature overnight. After THF was distilled off under reduced pressure, 200 ml of methylene chloride was added. 20% organic layer
After washing twice with 100 ml of aqueous hydrochloric acid solution and three times with 100 ml of water and drying over magnesium sulfate, the solvent was distilled off under reduced pressure to obtain 16.9 g of a crude compound. Recrystallization from ethyl acetate-hexane gave 7.72 g of the title compound.

Yield 50% mp: 248-250 ° C. ¹ H-NMR (CDCl ₃ ): δ 1.21 (36H,
s), 1.26 (36H, s), 5.09 (2H, d,
J = 1.8 Hz), 5.67 (2H, d, J = 1.7H)
z), 6.67 (2H, dd, J = 8.1, 2.2H
z), 6.75 (2H, dd, J = 13.8, 8.1H
z), 7.44-7.50 (8H, m), 7.62 (4
H, dd, J = 12.8, 1.9 Hz) ³¹ P-NMR (CDCl ₃ ): δ31.6

Example 17 Synthesis of ((6,6 ′)-bismethoxybiphenyl-2,2′-diyl) bis (diphenylphosphine oxide) Diphenyl (3-methoxy) at −78 ° C. under a nitrogen stream. 0.86 g (2.79 mm) of phenyl) phosphine oxide
ol) in THF (5 mL) was added with 0.7N LDA-TH.
The F solution (4.19 mmol) was added, and the mixture was stirred for 45 minutes. Next, at −78 ° C., 0.7 g of iron trichloride (4.19 mm
ol) and stirred for 1 hour, and then returned to room temperature and stirred overnight. THF was distilled off under reduced pressure, a saturated aqueous solution of ammonium chloride was added, and the mixture was stirred and extracted with ethyl acetate. The organic layer was separated, washed with saturated saline and dried over magnesium sulfate, and then the solvent was distilled off under reduced pressure to obtain a crude product. Purification by a silica gel column gave 0.73 g of the title compound. 85% yield

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Ishi ▲ Saki ▼ Kenro 1-4-11 Nishi-Hachiman, Hiratsuka-shi, Kanagawa Prefecture Takasago International Corporation (56) References JP-A-11-246576 (JP) (A) JP-A-10-182678 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C07F 9/53 CA (STN) REGISTRY (STN)

Claims (6)

(57) [Claims] 1. A compound of the general formula (2): [In the formula, R ¹ is a cycloalkyl group, a phenyl group, a substituted phenyl group (the substituent is substituted with 1 to 5 substituents, and each substituent may be the same or different; a halogen atom,
A lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group, a halogenated lower alkyl group, and a phenyl group), a naphthyl group optionally substituted with a lower alkyl group or a lower alkoxyl group, Represents a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group, and R ⁴ represents a hydrogen atom, a halogen atom,
Represents a lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group, a halogenated lower alkyl group or a phenyl group. Wherein the phosphine oxide compound represented by the general formula (1) is treated with a base and then dimerized using an oxidizing agent. (Wherein, R ¹ and R ⁴ represent the same as described above). 2. A compound of the general formula (3): (Wherein R ⁴ represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group,
Represents a halogenated lower alkyl group or a phenyl group,
Represents magnesium or lithium, Y represents a halogen atom, and n represents 0 or 1. ) Is represented by the general formula (4): [In the formula, R ¹ is a cycloalkyl group, a phenyl group, or a substituted phenyl group (the substituent is substituted with 1 to 5 substituents, and each substituent may be the same or different; a halogen atom, a lower alkyl group, Optionally selected from the group consisting of an alkoxyl group, a di-lower alkylamino group, a halogenated lower alkyl group, and a phenyl group), a naphthyl group which may be substituted with a lower alkyl group or a lower alkoxyl group,
Represents a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group. A phosphinic acid chloride compound represented by the following general formula (2): (Wherein, R ¹ and R ⁴ represent the same as described above). 3. A compound of the general formula (3): (Wherein R ⁴ represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxyl group, a di-lower alkylamino group,
Represents a halogenated lower alkyl group or a phenyl group,
Represents magnesium or lithium, Y represents a halogen atom, and n represents 0 or 1. The compound represented by the general formula (5): (Wherein, R ⁵ each independently represents an alkyl group or an unsubstituted or substituted phenyl group), and reacted with a chlorophosphate compound represented by the general formula (6): (Wherein, R ⁴ and R ⁵ represent the same as described above), and then a general formula (7): R ¹ MY _n (7) wherein R ¹ is cycloalkyl Group, phenyl group, substituted phenyl group (the substituents are substituted with 1 to 5 substituents, each of which may be the same or different, halogen atom, lower alkyl group, lower alkoxyl group, di-lower alkylamino group, A halogenated lower alkyl group, arbitrarily selected from the group consisting of a phenyl group), a naphthyl group which may be substituted with a lower alkyl group or a lower alkoxyl group,
Represents a pyridyl group, a quinolyl group, an isoquinolyl group, a furfuryl group, a benzofurfuryl group, a thienyl group, or a benzothienyl group, M represents magnesium or lithium, Y represents a halogen atom, and n represents 0 or 1. . ]
Wherein a Grignard compound or a lithium compound represented by the following formula is continuously reacted: (Wherein, R ¹ and R ⁴ represent the same as described above). 4. The method for producing a diphosphine oxide compound according to claim 1, wherein the base is a base selected from an organic lithium reagent such as lithium alkylamide, alkyllithium and allyllithium, and a Grignard reagent. 5. The process for producing a diphosphine oxide compound according to claim 1, wherein the oxidizing agent is a metal compound having an oxidizing property. 6. The diphosphine according to claim 5, wherein the oxidizing metal compound is at least one selected from metal salts or metal complex compounds of iron, copper, ruthenium, cobalt, nickel, vanadium, molybdenum, manganese, titanium. A method for producing an oxide compound.