JP2007308416A - Method of manufacturing bifunctional epoxy monomer by selective oxidation of diolefin compound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new method of manufacturing a bifunctional epoxy monomer by selective oxidation of a diolefin compound. <P>SOLUTION: In the method, the bifunctional epoxy monomer expressed by general formula (B), in which R<SP>1</SP>-R<SP>5</SP>are the same as being defined in general formula (A), is manufactured by oxidizing a compound expressed by general formula (A), in which n shows an integer of 1-3, R<SP>1</SP>-R<SP>5</SP>are each, independently the same as or different from one another, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, a 1-4C alkyl group, a 1-4C alkoxy group, a 3-7C cycloalkyl group, an aryl group, an aralkyl group, an acyl group, an acyloxy group or the like, by using a hydrogen peroxide water solution as an oxidizing agent in the presence of a metal compound of the group 6 (molybdenum, tungsten) and a quaternary ammonium hydrogen sulfate in halogen-free and solvent-free state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a bifunctional compound containing an epoxy group and a double bond in the molecule, which are expected to be used in fields such as solder resists and interlayer insulation films, electrical insulation materials, IC and VLSI sealing materials, and laminates. The present invention relates to a process for epoxidizing diolefins in a halogen-free and solvent-free manner so as to obtain an epoxy monomer. In particular, the present invention provides a novel bifunctional epoxy monomer that reacts diolefins with aqueous hydrogen peroxide in the presence of catalytic molybdenum or tungsten oxide to selectively epoxidize one double bond. It relates to the manufacturing method.

  In recent years, development of more excellent polymer materials has been promoted along with higher functionality and higher performance of industrial products. Among such materials, epoxy resins have a wide range of industrial uses as thermosetting resins and other reactive resins, and have been studied and developed from various fields. Currently, the most widely used epoxy resins in the industry are epichlorohydrin and bisphenol A, bisphenol A type epoxy resin and phenol novolac type epoxy resin produced from phenol resin, and chlorine is several tens of ppm in the resin. In addition to the problem of deteriorating the electrical properties of the electrical components, the dielectric constant is high for bisphenol A type and novolac type epoxy resins. Therefore, an epoxy resin that does not contain chlorine and has excellent electrical properties and heat resistance is particularly required for semiconductor encapsulating materials and the like. Under such circumstances, bifunctional epoxy monomers containing an epoxy group and a double bond in the molecule are attracting attention as a new raw material for epoxy resins because they can be oligomerized using double bonds. .

  A bifunctional epoxy monomer containing an epoxy group and a double bond in the molecule can be obtained by selectively epoxidizing (monoepoxidizing) one double bond of the corresponding diolefins. In many cases, the technology for monoepoxidation is low-reactivity, low-selectivity, or limited to a certain type of structure having applicability.

  Conventionally, peracids such as peracetic acid and perbenzoic acid have been used as oxidizing agents utilized for selective epoxidation of diolefins (see Patent Document 1, Patent Document 2, and Non-Patent Document 1 below). In these methods, diolefins are required in excess of peracid as an epoxidizing agent in order to suppress the formation of diepoxide as a by-product, and an oxidant-derived acid is generated in an equivalent amount. There are problems such as corrosion. In addition, a selective epoxidation method of diolefin using oxygen molecules as an oxidant in the presence of a metal catalyst and a ketone is also known (see Non-Patent Document 2 below). In addition to the necessity (2 equivalents to diolefins), the monoepoxidation selectivity is very high, but the raw material conversion rate is poor. Recently, a selective epoxidation method of diolefins using TBHP as an epoxidizing agent catalyzed by metal silicate (see Non-Patent Document 3 below) has also been reported, but the substrate specificity is intense and the reaction operation There is also a problem that it is disadvantageous for industrialization in terms of cost. On the other hand, hydrogen peroxide water is inexpensive and non-corrosive, has no by-product after the reaction or is water, has a low environmental load, and is an excellent oxidizing agent for industrial use.

  As a method of producing bifunctional epoxy monomers by selective epoxidation of diolefins using hydrogen peroxide solution as an epoxidizing agent, (1) Epoxidation reaction of diolefin using halogen-containing ketone as catalyst (the following non-patents) (Ref. 4), (2) Epoxidation reaction of diolefin catalyzed by quaternary ammonium silicon tungstate (see Non-Patent Document 5 below), (3) Quaternary ammonium phosphorus tongue Diolefin epoxidation reaction catalyzed by state (see Non-Patent Document 6 below), (4) Diolefin epoxidation reaction catalyzed by cetylpyridium chloride and phosphotungstic acid (non-patent literature below) (Refer to Reference 7), (5) Epoxidation reaction of diolefins using crystalline titanium-containing molecular sieve catalyst (see Patent Document 3 below), (6) Imi Epoxidation reaction of diolefin using group 6 metal or titanium complex catalyst containing sol ligand (see Patent Document 4 below), (7) Epoxidation of diolefin using organorhenium oxide as catalyst A number of methods have been reported (see Non-Patent Document 8 below). However, in the above method (1), peroxide is generated in the reaction system, so that post-treatment is complicated and there is a problem in safety. In method (2), since the amount of hydrogen peroxide is about 20% with respect to 1 equivalent of diolefin, monoepoxidation selectivity is very high, but a large amount of unreacted diolefin remains. Separation / purification process takes time and cost, resulting in poor productivity. In the methods (3), (4) and (5), both the diolefin reaction conversion rate and monoepoxidation selectivity are good, but a highly toxic reaction solvent is required (chloroform and benzene). Since a chlorine compound is used as a phase transfer catalyst, there is a possibility that chlorine is mixed in the epoxy resin as the final product, and the risk of deterioration of the performance of the epoxy resin cannot be excluded. In the methods (6) and (7), diolefins are required in excess relative to the oxidizing agent, and the raw material conversion rate and reaction yield are low. In method (7), bromobenzene or toluene is used as a reaction solvent, which has a large environmental impact. In method (8), although the reaction conversion rate of the diolefin is high, a large amount of a diol compound obtained by hydrolysis of a bifunctional epoxy monomer is produced as a by-product, and the yield of the target monoepoxy compound is low. Moreover, since organic rhenium oxide is very expensive, it is industrially disadvantageous from the viewpoint of cost.

  On the other hand, in the epoxidation reaction of olefins, it has been pointed out that the reaction is greatly hindered by the presence of halogen ions in the reaction system, resulting in a decrease in reaction yield and catalytic activity. In order to improve the yield and catalytic activity, ammonium hydrogen sulfate and methyl sulfate are used without using ammonium halide (see Patent Document 5, Non-Patent Document 9, and Non-Patent Document 10 below). ).

  Therefore, there is a strong demand for the development of a method for producing bifunctional epoxy monomers selectively from diolefins safely and easily with a simple operation without using an organic solvent under mild conditions and in a low cost. Yes.

US Patent 2687406. JP 61-72774 JP 7-242649 A. JP-A-6-343872. Japanese Patent Application 2005-143124. J. Am. Chem. Soc., 1959, 81, 3350. J. Org. Chem., 1993, 58, 6421. Chem. Commun., 1998, 1123. Tetrahedron Lett., 1981, 22, 2089. Journal of Catalysis, 2004, 224, 224. J. Org. Chem., 1988, 53, 1553. J. Org. Chem., 1988, 53, 3587. Angew. Chem. Int. Ed. Engl., 1991, 30, 1638. Organic Process Research & Development, 2004, 8, 524. Chem. Commun., 2003, 16, 1977.

  The present invention provides a novel method for producing a safe and easy bifunctional epoxy monomer by the reaction of diolefins and aqueous hydrogen peroxide without using any organic solvent or halogen compound in the epoxidation reaction under mild conditions. This is the issue.

  As a result of diligent research to solve the above-mentioned problems, the inventors of the present invention did not use an organic solvent, and diolefins using a quaternary ammonium hydrogen sulfate and a group 6 metal compound (molybdenum, tungsten) as a catalyst. When the reaction with an aqueous hydrogen peroxide solution was performed, it was discovered that a bifunctional epoxy monomer containing an epoxy group and a double bond in the molecule was selectively produced in a high yield, and the present invention was completed.

｛式中、nは1〜3の整数を示し、R¹〜R⁵はそれぞれ独立して同一又は相異なり、水素原子、ヒドロキシ基、ハロゲン原子、カルボキシル基、炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、アシル基、アシロキシ基、あるいは、R¹とR²、R¹とR³、R¹とR⁴、R¹とR⁵、R²とR³、R²とR⁴、R²とR⁵、R³とR⁴、R³とR⁵又はR⁴とR⁵が炭素数１〜３の炭素鎖で架橋されたものを示し、これらは独立に炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、カルボキシル基で置換されていてもよい。｝で表されるジオレフィン化合物を酸化することにより、下記一般式(Ｂ)：

｛式中、nは1〜3の整数を示し、R¹〜R⁵はそれぞれ独立して同一又は相異なり、水素原子、ヒドロキシ基、ハロゲン原子、カルボキシル基、炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、アシル基、アシロキシ基、あるいは、R¹とR²、R¹とR³、R¹とR⁴、R¹とR⁵、R²とR³、R²とR⁴、R²とR⁵、R³とR⁴、R³とR⁵又はR⁴とR⁵が炭素数１〜３の炭素鎖で架橋されたものを示し、これらは独立に炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、カルボキシル基で置換されていてもよい。｝で表される二官能性エポキシモノマーを製造する方法。 According to the present invention, the following inventions are provided.
(1) Using an aqueous hydrogen peroxide solution as an oxidizing agent, the following general formula (A):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } By oxidizing the diolefin compound represented by the following general formula (B):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } The manufacturing method of the bifunctional epoxy monomer represented by this.

(2) The method according to (1), wherein a group 6 metal compound (molybdenum, tungsten) and quaternary ammonium hydrogen sulfate are used as a catalyst.

(3) The method according to (1) or (2) above, wherein the reaction is carried out without halogen.

(4) The method according to (3) above, wherein the reaction is carried out without a solvent.

  The production method of the bifunctional epoxy monomer provided by the present invention is used as an electrical insulating material (solder-resist material) such as an interlayer insulating film, a raw material for IC and VLSI sealing material, an intermediate for agricultural chemicals and pharmaceuticals, Bifunctional epoxy monomers, which are useful substances widely used in various industrial fields, including chemical industry, as raw materials for various polymers such as plasticizers, adhesives, and coating resins, are used for the corresponding diolefins and aqueous hydrogen peroxide solutions. It can be produced safely and efficiently by the reaction. In addition, since this production method is halogen-free, it can greatly reduce the burden on the environment, and it can be expected that the performance of various polymers will be improved because there is no possibility of halogens being mixed into various final polymers. In addition, since this method does not use organic solvents, acids, or bases except for post-treatment operations, it can be produced at low cost.

｛式中、nは1〜3の整数を示し、R¹〜R⁵はそれぞれ独立して同一又は相異なり、水素原子、ヒドロキシ基、ハロゲン原子、カルボキシル基、炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、アシル基、アシロキシ基、あるいは、R¹とR²、R¹とR³、R¹とR⁴、R¹とR⁵、R²とR³、R²とR⁴、R²とR⁵、R³とR⁴、R³とR⁵又はR⁴とR⁵が炭素数１〜３の炭素鎖で架橋されたものを示し、これらは独立に炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、カルボキシル基で置換されていてもよい。｝で表される化合物である。 The raw diolefin compound in the present invention is, for example, the following general formula (A):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } It is a compound represented.

  Specific examples of the diolefin compound include, for example, 4-vinyl-1-cyclohexene, 1-methyl-4-vinyl-1-cyclohexene, 4-methyl-4-vinyl-1-cyclohexene, and 1-phenyl-4- Vinyl-1-cyclohexene, 1,2-dimethyl-4-vinyl-1-cyclocyclohexene, 3,4-diethyl-4-vinyl-1-cyclohexene, 4-vinyl-1-cycloheptene, 4-methyl-4-vinyl -1-cycloheptene, 1-phenyl-4-vinyl-1-cycloheptene, 1,2-dimethyl-4-vinyl-1-cyclocycloheptene, 3,4-diethyl-4-vinyl-1-cycloheptene 4-vinyl -1-cyclooctene, 1-methyl-4-vinyl-1-cyclooctene, 4-methyl-4-vinyl-1-cyclooctene, 1-phenyl-4-vinyl-1-cyclooctene, 1,2-dimethyl -4-vinyl-1-cyclocyclooctene, 3,4-diethyl-4-vinyl-1-cyclooctene, 5-vinylbicyclo [2.2.1] hept-2-ene, 5-methyl-5-vinylbicyclo [2.2.1] hept-2-ene, 2,3-dimethyl-5-vinylbicyclo [2.2.1] hept-2-ene, 2,3,5-trimethyl-5- And vinyl bicyclo [2.2.1] hept-2-ene.

  The starting diolefin compound in the present invention is preferably 4-vinyl-1-cyclohexene, 1,2-dimethyl-4-vinyl-1-cyclocyclohexene, 4-vinyl-1-cycloheptene, 5-vinylbicyclo [2.2. .1] hept-2-ene, 2,3,5-trimethyl-5-vinylbicyclo [2.2.1] hept-2-ene, and the like.

  The amount of the aqueous hydrogen peroxide solution used in the production method of the present invention is not limited, and the reaction to diolefins occurs depending on the amount used, but generally 0.8 to 5.0 equivalents, preferably 1.0 to 2.0. Selected from a range of equivalents.

  The concentration of the aqueous hydrogen peroxide solution used in the production method of the present invention is not limited, and the reaction to diolefins occurs depending on the concentration, but generally 1 to 80%, preferably 10 to 60%. Selected from a range.

  Examples of the quaternary ammonium hydrogen sulfate include tetrahexyl ammonium hydrogen sulfate, tetraoctyl ammonium hydrogen sulfate, methyl trioctyl ammonium hydrogen sulfate, tetrabutyl ammonium hydrogen sulfate, ethyl trioctyl ammonium hydrogen sulfate, cetylpyridinium hydrogen sulfate, and the like. However, tetrahexyl ammonium hydrogen sulfate, tetraoctyl ammonium hydrogen sulfate, methyl trioctyl ammonium hydrogen sulfate, and the like are preferable. These quaternary ammonium hydrogen sulfates may be used alone or in combination of two or more. The amount to be used is selected from the range of 0.0001 to 10 mol%, preferably 0.01 to 5 mol%, based on the diolefin as a substrate.

  In the case of molybdenum, the Group 6 metal compound is a compound that generates a molybdate anion in water. For example, molybdic acid, molybdenum trioxide, molybdenum trisulfide, molybdenum hexachloride, phosphomolybdic acid, ammonium molybdate, potassium molybdate Examples thereof include dihydrate and sodium molybdate dihydrate, but molybdic acid, molybdenum trioxide, and phosphomolybdic acid are preferable. In the case of tungsten, it is a compound that produces tungstate anions in water, such as tungstic acid, tungsten trioxide, tungsten trisulfide, tungsten hexachloride, phosphotungstic acid, ammonium tungstate, potassium tungstate dihydrate, tungstic acid Examples thereof include sodium dihydrate, and tungstic acid, tungsten trioxide, phosphotungstic acid, sodium tungstate dihydrate and the like are preferable. These Group 6 metal compounds may be used alone or in combination of two or more. The amount used is selected from the range of 0.0001 to 20 mol%, preferably 0.01 to 10 mol%, based on the diolefins of the substrate. This type of catalyst may be modified by using additives such as phosphoric acid, polyphosphoric acid, aminomethylphosphonic acid, and sodium phosphate.

  In the production method of the present invention, the reaction is usually carried out in the range of 30 to 100 ° C, preferably in the range of 50 to 90 ° C.

  The reaction time in the production method of the present invention depends on the reaction temperature and cannot be generally defined, but is usually in the range of 30 minutes to 12 hours, preferably in the range of 1 to 6 hours.

｛式中、nは1〜3の整数を示し、R¹〜R⁵はそれぞれ独立して同一又は相異なり、水素原子、ヒドロキシ基、ハロゲン原子、カルボキシル基、炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、アシル基、アシロキシ基、あるいは、R¹とR²、R¹とR³、R¹とR⁴、R¹とR⁵、R²とR³、R²とR⁴、R²とR⁵、R³とR⁴、R³とR⁵又はR⁴とR⁵が炭素数１〜３の炭素鎖で架橋されたものを示し、これらは独立に炭素数１〜４のアルキル基、炭素数１〜４のアルコキシ基、炭素数３〜７のシクロアルキル基、アリール基、アラルキル基、カルボキシル基で置換されていてもよい。｝で表される化合物である。 As the bifunctional epoxy monomer thus obtained, the general formula (B):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } It is a compound represented.

Specific examples of the bifunctional epoxy monomer include, for example, 4-vinyl-1,2-epoxycyclohexane, 1-methyl-4-vinyl-1,2-epoxycyclohexane, 4-methyl-4-vinyl-1, 2-epoxycyclohexane, 1-phenyl-4-vinyl-1,2-epoxycyclohexane, 1,2-dimethyl-4-vinyl-1,2-epoxycyclohexane, 3,4-diethyl-4-vinyl-1,2 -Epoxycyclohexane, 4-vinyl-1,2-epoxycycloheptane, 4-methyl-4-vinyl-1,2-epoxycycloheptane, 1-phenyl-4-vinyl-1,2-epoxycycloheptane, 1, 2-dimethyl-4-vinyl-1,2-epoxycycloheptane, 3,4-diethyl-4-vinyl-1,2-epoxycycloheptane, 4-vinyl-1,2-epoxycyclooctane, 1-methyl- 4-vinyl-1,2-epoxycyclooctane, 4-methyl-4-vinyl-1,2-epoxycyclooctane, 1-phenyl-4-vinyl-1,2- Poxycyclooctane, 1,2-dimethyl-4-vinyl-1,2-epoxycyclooctane, 3,4-diethyl-4-vinyl-1,2-epoxycyclooctane, 6-vinyl-3-oxa [3.2. 1.0 ^2,4 ] octane, 6-methyl-6-vinyl-3-oxa [3.2.1.0 ^2,4 ] octane, 2,3-dimethyl-6-vinyl-3-oxa [3.2.1.0 ^2,4 ] octane 2,3,6-trimethyl-6-vinyl-3-oxa [3.2.1.0 ^2,4 ] octane, and the like.

The bifunctional epoxy monomer in the present invention is preferably -vinyl-1,2-epoxycyclohexane, 1,2-dimethyl-4-vinyl-1,2-epoxycyclohexane, 4-vinyl-1,2-epoxycyclohexane. Heptane, 6-vinyl-3-oxa [3.2.1.0 ^2,4 ] octane, 2,3,6-trimethyl-6-vinyl-3-oxa [3.2.1.0 ^2,4 ] octane, and the like.

  The target bifunctional epoxy monomer thus produced can be extracted by a usual method such as distillation after concentrating the mixed solution after completion of the reaction.

Next, the present invention will be described in detail with reference to examples.
Examples described below are examples of typical compounds for facilitating the understanding of the present invention, and the present invention is not limited thereto.

Example 1
In a test tube equipped with a magnetic stir bar, sodium tungstate dihydrate (26.4 mg, 0.08 mmol), methyl trioctylammonium hydrogen sulfate (14.1 mg, 0.031 mmol), 30% aqueous hydrogen peroxide (504 mg, 4.4 mmol) ) And stirred for 15 minutes at room temperature until a uniform solution was obtained (stirring speed: 1000 rpm). 4-vinyl-1-cyclohexene (432 mg, 4 mmol) was added to this solution, and the mixture was stirred at room temperature for 15 minutes (stirring speed: 1000 rpm), then heated to 65 ° C. and reacted for 3.5 hours. The reaction solution was cooled to room temperature and then stirred for about 15 minutes while slowly dropping a saturated aqueous solution of sodium thiosulfate (1 ml) to completely stop the reaction. Thereafter, organic substances were extracted with ethyl acetate (2 ml × 3 times). When the obtained solution was measured by gas chromatography, the conversion rate of 4-vinyl-1-cyclohexene as a raw material was 46% and 4-vinyl-1,2-epoxycyclohexane as a bifunctional epoxy monomer was found. Was 40%, and trace amount of 4-vinyl-1,2-dihydroxycyclohexane as a by-product was confirmed. No other diepoxide compounds were produced and the monoepoxy selectivity was 91%.

Example 2
In a test tube equipped with a magnetic stir bar, sodium tungstate dihydrate (26.4 mg, 0.08 mmol), methyl trioctylammonium hydrogen sulfate (12.7 mg, 0.027 mmol), aminomethylphosphonic acid (4.2 mg, 0.038 mmol), 30 % Hydrogen peroxide aqueous solution (480 mg, 4.2 mmol) was added, and the mixture was stirred at room temperature for 15 minutes until it became a homogeneous solution (stirring speed: 1000 rpm). 4-vinyl-1-cyclohexene (432 mg, 4 mmol) was added to this solution, and the mixture was stirred at room temperature for 15 minutes (stirring speed: 1000 rpm), then heated to 65 ° C. and reacted for 3.5 hours. The reaction solution was cooled to room temperature and then stirred for about 15 minutes while slowly dropping a saturated aqueous solution of sodium thiosulfate (2 ml) to completely stop the reaction. Thereafter, organic substances were extracted with ethyl acetate (2 ml × 3 times). When the obtained solution was measured by gas chromatography, the conversion rate of 4-vinyl-1-cyclohexene, which is a raw material, was 75%, and 4-vinyl-1,2-epoxycyclohexane, which is a bifunctional epoxy monomer. Of 68% and 4-vinyl-1,2-dihydroxycyclohexane as a by-product of 6%. No other diepoxide compounds were produced and the monoepoxy selectivity was 91%.

Example 3
In a test tube equipped with a magnetic stirrer, phosphotungstic acid n-hydrate (16.5 mg), methyl trioctylammonium hydrogen sulfate (19.8 mg, 0.043 mmol), aminomethylphosphonic acid (3.5 mg, 0.032 mmol), dihydrogen phosphate Sodium (60.4 mg, 0.043 mmol) and 30% aqueous hydrogen peroxide solution (560 mg, 4.9 mmol) were added, and the mixture was stirred at room temperature for 15 minutes until it became a homogeneous solution (stirring speed: 1000 rpm). 4-vinyl-1-cyclohexene (432 mg, 4 mmol) was added to this solution, and the mixture was stirred at room temperature for 15 minutes (stirring speed: 1000 rpm), then heated to 65 ° C. and reacted for 3.5 hours. The reaction solution was cooled to room temperature and then stirred for about 15 minutes while slowly dropping a saturated aqueous solution of sodium thiosulfate (2 ml) to completely stop the reaction. Thereafter, organic substances were extracted with ethyl acetate (2 ml × 4 times). When the obtained solution was measured by gas chromatography, the conversion rate of 4-vinyl-1-cyclohexene as a raw material was 85%, and 4-vinyl-1,2-epoxycyclohexane as a bifunctional epoxy monomer was obtained. Of 71% and 4-vinyl-1,2-dihydroxycyclohexane as a by-product of 7%. No other diepoxide compounds were produced, and the monoepoxy selectivity was 83%.

Comparative Example 1
In a test tube equipped with a magnetic stir bar, add sodium tungstate dihydrate (26.4 mg, 0.080 mmol), aminomethylphosphonic acid (4.5 mg, 0.040 mmol), and 30% aqueous hydrogen peroxide (504 mg, 4.4 mmol). The mixture was stirred for 15 minutes at room temperature until a homogeneous solution was obtained (stirring speed: 1000 rpm). 4-vinyl-1-cyclohexene (432 mg, 4.0 mmol) was added to this solution, and the mixture was stirred at room temperature for 15 minutes (stirring speed: 1000 rpm), then heated to 65 ° C. and reacted for 3.5 hours. The reaction solution was cooled to room temperature and then stirred for about 15 minutes while slowly dropping a saturated aqueous solution of sodium thiosulfate (2 ml) to completely stop the reaction. Thereafter, organic substances were extracted with ethyl acetate (2 ml × 3 times). When the obtained solution was measured by gas chromatography, the conversion rate of 4-vinyl-1-cyclohexene, which is a raw material, was almost 0%, and 4-vinyl-1,2-epoxy, which is a bifunctional epoxy monomer, was obtained. Cyclohexane and 4-vinyl-1,2-dihydroxycyclohexane could not be confirmed at all.

Comparative Example 2
In a test tube equipped with a magnetic stir bar, sodium tungstate dihydrate (26.4 mg, 0.080 mmol), methyl trioctyl ammonium chloride (16.1 mg, 0.040 mmol), aminomethylphosphonic acid (4.5 mg, 0.040 mmol), 30% Aqueous hydrogen peroxide solution (504 mg, 4.4 mmol) was added, and the mixture was stirred at room temperature for 15 minutes until it became a homogeneous solution (stirring speed: 1000 rpm). 4-vinyl-1-cyclohexene (432 mg, 4.0 mmol) was added to this solution, and the mixture was stirred at room temperature for 15 minutes (stirring speed: 1000 rpm), then heated to 65 ° C. and reacted for 3.5 hours. The reaction solution was cooled to room temperature and then stirred for about 15 minutes while slowly dropping a saturated aqueous solution of sodium thiosulfate (2 ml) to completely stop the reaction. Thereafter, organic substances were extracted with ethyl acetate (2 ml × 3 times). The obtained solution was measured by gas chromatography. As a result, the conversion rate of 4-vinyl-1-cyclohexene as a raw material was 58%, and 4-vinyl-1,2-epoxycyclohexane as a bifunctional epoxy monomer was obtained. Was 47%, and trace amount of 4-vinyl-1,2-dihydroxycyclohexane as a by-product was confirmed. No other diepoxide compounds were produced and the monoepoxy selectivity was 81%.

Claims (4)

Using an aqueous hydrogen peroxide solution as the oxidizing agent, the following general formula (A):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } By oxidizing the diolefin compound represented by the following general formula (B):

{In the formula, n represents an integer of 1 to 3, and R ^{1 to} R ⁵ are each independently the same or different, a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group having 1 to 4 carbon atoms, alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, an acyl group, an acyloxy group or,, R ¹ and R ^2, R ¹ and R ^3, R ¹ and R ⁴ , R ¹ and R ⁵ , R ² and R ³ , R ² and R ⁴ , R ² and R ⁵ , R ³ and R ⁴ , R ³ and R ⁵ or R ⁴ and R ⁵ are carbons having 1 to 3 carbon atoms These are crosslinked with a chain, and these are independently an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, an aryl group, an aralkyl group, and a carboxyl group. May be substituted. } The manufacturing method of the bifunctional epoxy monomer represented by this.   The process according to claim 1, characterized in that a Group 6 metal compound (molybdenum, tungsten) and quaternary ammonium hydrogen sulfate are used as catalysts.   The process according to claim 1 or 2, wherein the reaction is carried out in a halogen-free manner.   The process according to claim 3, wherein the reaction is carried out without solvent.