Novel organosilicon compound and process for producing organosilicon compound

Abstract: An organosilicon compound having a Si-C-C-Si bond, a C=C-Si bond and/or a CH-CH-Si bond is prepared by reacting an olefin or a substituted olefin with a disilane in the presence of a platinum-containing catalyst. The resulting compound can be further treated with an alkyl lithium, an aryl lithium or a Grignard reagent.

Description: The present invention relates to a process for the preparation of organosilicon compounds. Alkenylsilanes may be converted into silanes having various structures. They are also extremely useful as intermediates for organic synthesis or as raw materials for physiologically active substances. Alkylsilanes are also useful as intermediate substances for organic synthesis and raw materials for synthesis of physiologically active substances. Their uses are disclosed in Synthesis, 1979, 761; E. W. Colvin: "Silicon in Organic Synthesis", Butterworths (1981); W. P. Weber: "Silicon Reagents for Organic Synthesis", Springer (1983), etc. Further, bis(silyl)alkanes are used as intermediate substances for organic synthesis and for synthesis of physiologically active substances and they are polymerized into polycarbosilanes which are useful as photo-degradable polymers, resist materials having a high resistance to oxygen plasma, precursors for silicon carbide, and so on. The alkenylsilanes are conventionally prepared as follows: (1) by hydrosilylating an acetylene with a hydrosilane in the presence of a catalyst; (2) by converting an acetylene into a metal acetylide and reacting the metal acetylide with a halosilane followed by reducing the resulting silyl acetylene; (3) converting an alkenyl halide into an alkenyl metal compound which, in turn, is reacted with a halosilane; and (4) reacting an alkenyl halide with a silyl alkali metal. The alkylsilanes may be prepared by the following conventional procedures: (5) by hydrosilylating olefins with a hydrosilane in the presence of a catalyst; and (6) by reacting an alkali metal compound with a halosilane. Furthermore, the bis(silyl)alkanes may be conventionally prepared as follows: (7) by reacting a compound having an acetylenic, unsaturated bond, C≡C, with a compound having a Si-Si bond in the presence of a catalyst to thereby give a compound having a Si-C=C-Si bond which, in turn, is hydrogenated; and (8) by reacting the vinylsilane prepared in the procedures (1) to (4) above with a hydrosilane in the presence of a catalyst. These conventional procedures present various disadvantages and are said to be insufficient in various respects. The conventional processes as referred to as (1), (2) and (7) above use an acetylene as a raw material, which is expensive and also apt to be explosive that the processes are difficult to accomplish on an industrial scale. The processes (1), (5) and (8) use a hydrosilane which is also expensive so that they too are industrially disadvantageous. For the processes (2), (3), (4) and (6), there are used alkali metal compounds or magnesium reagents which also are expensive and may be dangerous in use and also so highly reactive that they may present the problem of having to protect functional groups of the resulting compounds. Furthermore, the processes (2), (3), (4), (6), (7) and (8) are each a multi-step process which is remote from the end step. Therefore, the present invention has the object to provide a process for the preparation of organosilicon compounds in which there are used an olefin or a substituted olefin as well as a disilane, which are easy to handle and, further, which can be accomplished in one step. More particularly, the present invention provides a process for preparing an organosilicon compound having a Si-C-C-Si bond and/or organosilicon compound having a C=C-Si bond and/or an organosilicon compound having a CH-CH-Si bond, comprising the step of (a) reacting an olefin compound represented by the following general formula (I): R¹R²C=CHR³ (I) wherein R¹, R² and R³ are each hydrogen atom, an alkyl group, a cycloalkyl group, an aliphatic heterocyclic group, an aralkyl group, an aryl group, an aromatic heterocyclic group, an alkoxycarbonyl group, a cyano group, an N,N-dialkylaminocarbonyl group, an alkoxy group, an N,N-dialkylamino group, an N-alkyl-N-acylamino group or an N,N-diacylamino group, and may link with each other to form a cyclic structure, with a disilane represented by the following general formula (II): R⁴R⁵R⁶Si-SiR⁷R⁸R⁹ (II) wherein R⁴, R⁵, R⁶, R⁷, R⁸ and R⁹ are each an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an acyloxy group, an N,N-dialkylamino group, fluorine atom, bromine atom or chlorine atom, and may link with each other to form a cyclic structure, in the presence of a platinum-containing catalyst. In one embodiment of the present invention, the product obtained in step (a) is treated with an alkyl lithium, an aryl lithium or Grignard reagent. As already mentioned, in the process for the preparation of organosilicon compounds of the present invention, an olefin compound is reacted with a disilane in the presence of the platinum-containing catalyst. The olefin compound to be used as one of the starting materials is a compound of an ethylene series represented by the following general formula (I): R¹R²C=CHR³ (I) wherein R¹, R² and R³ are each hydrogen atom, an alkyl group, a cycloalkyl group, an aliphatic heterocyclic group, an aralkyl group, an aryl group, an aromatic heterocyclic group, an alkoxycarbonyl group, a cyano group, an N,N-dialkylaminocarbonyl group, an alkoxy group, an N,N-dialkylamino group, an N-alkyl-N-acylamino group or an N,N-diacylamino group, and may link with each other to form a cyclic structure. Examples of suitable olefin compounds include ethylene, propylene, cis-2-butene, 1-hexene, t-butylethylene, cyclopentene, norbornene, vinylcyclohexane, 2-vinyltetrahydropyrane, α-methylene-γ-butyrolactone, allylbenzene, styrene, 4-vinylpyridine, ethyl acrylate, acrylonitrile, N,N-dimethylacrylamide, methylvinyl ether, N-(1-cyclohexenyl)pyrrolidine, N-methyl-N-vinylacetamide and N-vinylphthalimide. The disilane to be used as the second starting material in the process is a compound represented by the following formula (II): R⁴R⁵R⁶Si-SiR⁷R⁸R⁹ (II) wherein R⁴, R⁵, R⁶, R⁷, R⁸ and R⁹ are each an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an acyloxy group, an N,N-dialkylamino group, fluorine atom, bromine atom or chlorine atom, and may link with each other to form a cyclic structure. Illustrative of suitable disilanes are hexamethyldisilane, hexaethyldisilane, tetramethyldiphenyldisilane, tetraphenyldimethyldisilane, difluorotetramethyldisilane, dichlorotetramethyldisilane, trichlorotrimethyldisilane, tetrachlorodimethyldisilane, dimethoxytetramethyldisilane, hexachlorodisilane, tetramethoxydisilane, tetrafluorodimethyldisilane and 1,1,2,2-tetramethyl-1,2-disilacyclopentane. These compounds may be used singly or in combination of one or more thereof. The olefin compound and the disilane are generally used in amounts providing a molar ratio of the former to the latter ranging from approximately 100 to 1 to 1 to 10, although there is no substantial limit upon the ratio. The platinum-containing catalyst to be used may be chosen from any known ones and may be a platinum complex with a ligand, a platinum salt or platinum supported on a carrier such as active carbon. Suitable platinum catalysts include, for example, tetrakis(triphenylphosphine)platinum, tetrakis(dimethylphenylphosphine)platinum, dichlorobis(triphenylphosphine)platinum, ethylenebis(triphenylphosphine)platinum, chlorohydrobis(triethylphosphine)platinum, dichloro(tetramethylethylenediamine)platinum, dibromobis(trimethylphosphite)platinum, dichlorobis(benzonitrile)platinum, bis(cyclooctadiene)platinum, dichloro(cyclooctadiene)platinum, bis(benzylideneacetone)platinum, Zeise salt, platinum chloride, chloroplatinic acid or its salt, platinum black, platinum carbon, and so on. These platinum complexes and salts may be present with a ligand. The catalyst may be used in a stoichiometric amount and generally in an amount of 0.00001 to 0.5 mole per mole of the disilane to be used as the starting compound. The process according to the present invention may be carried out at a temperature ranging usually from 0°C to elevated temperatures, preferably from 50°C to 250°C. Further, it may be carried out usually in the presence or absence of a solvent. When a solvent is used, it may include, for example, a customarily used solvent such as an organic solvent, i.e., benzene, toluene, hexane or the like. When the disilane used as a starting material has an alkoxy group, fluorine atom, bromine atom or chlorine atom bonded to the silicon atom thereof, the organosilicon compound resulting from the above process may be further treated with an alkyl lithium, an aryl lithium or Grignard reagent, thereby yielding corresponding alkylated or arylated organosilicon compound. The alkyl lithium and the aryl lithium are preferably methyl lithium and phenyl lithium, respectively. The Grignard reagent may include, for example, a compound represented by the following general formula: RMgX in which reference symbol R may be any residue which varies with the group to be added or inserted into the resulting organosilicon compound and may be chosen from any per se known group, and reference symbol X may be any halogen atom which also can be chosen depending upon reactivity and other influences on the reaction system. The resulting compound may be separated and purified in conventional manner, as by distillation or chromatography. When ethylene is used as the olefin compound, the above processes according to the present invention, in either case, may provide an organosilicon compound represented by the following general formula (A): The organosilicon compounds as represented by the general formula (A) may include, for example, 1,2-bis(trimethylsilyl)ethane, 1,2-bis(triethylsilyl)ethane, 1,2-bis(dimethylphenyl)ethane, 1,2-bis(methyldiphenylsilyl)ethane, 1,2-bis(fluorodimethylsilyl)ethane, 1,2-bis(chlorodimethylsilyl)ethane, 1-(chlorodimethylsilyl)-2-(dichloromethylsilyl)ethane, 1,2-bis(dichloromethylsilyl)ethane, 1,2-bis(methoxydimethylsilyl)ethane, 1,2-bis(trichlorosilyl)ethane, 1,2-bis(dimethoxymethylsilyl)ethane, 1,2-bis(difluoromethylsilyl)ethane, 1,1,4,4-tetramethyl-1,4-disilacycloheptane, or the like. When a substituted olefin is used, the processes according to the present invention provides the organosilicon compounds represented by the following general formula (B): R¹R²C=CR³(SiR⁴R⁵R⁶) (B) wherein R¹, R² and R³ are each hydrogen atom, an alkyl group, a cycloalkyl group, an aliphatic heterocyclic group, an aralkyl group, an aryl group, an aromatic heterocyclic group, an alkoxycarbonyl group, a cyano group, an N,N-dialkylaminocarbonyl group, an alkoxy group, an N,N-dialkylamino group, an N-alkyl-N-acylamino group or an N,N-diacylamino group, and may link with each other to form a cyclic structure; and R⁴, R⁵ and R⁶ are each an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an acyloxy group, an N,N-dialkylamino group, fluorine atom, bromine atom or chlorine atom. Further, the processes according to the present invention can provide organosilicon compounds represented by the following general formula (C): R¹R²CHCHR³(SiR⁴R⁵R⁶) (C) wherein R¹, R², R³, R⁴, R⁵ and R⁶ have the same meanings as defined hereinabove. Furthermore, the processes according to the present invention can provide organosilicon compounds represented by the following general formula (D): R¹R²C(SiR⁷R⁸R⁹)CHR³(SiR⁴R⁵R⁶) (D) wherein R¹, R², R³, R⁴, R⁵ and R⁶ have the same meanings as defined hereinabove; R⁷, R⁸ and R⁹ are each an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an acyloxy group, an N,N-dialkylamino group, fluorine atom, bromine atom or chlorine atom, and may link with R⁴, R⁵ or R⁶ to form a cyclic structure. The organosilicon compounds represented by the general formulae (B), (C) and (D) may specifically include, for example, 1-propenylfluorodimethylsilane, 1-hexenylfluorodimethylsilane, 3,3-dimethyl-1-butenyltrimethylsilane, 2-cyclohexylvinyltrimethylsilane, 2-[2-{tri(N,N-dimethylamino)silyl}ethyl]tetrahydropyrane, α-trimethylsilylmethylidene-γ-butyrolactone, styryltrimethylsilane, 4-pyridylethenyltriethylsilane, methyl 2-(phenyldimethylsilyl)acrylate, 2-(phenyldimethylsilyl)acrylonitrile, 2-trimethylsilyl-N,N-dimethylacrylamide, propyltrimethoxysilane, n-hexylfluorodimethylsilane, 2-cyclohexylethyltrimethylsilane, 3-phenylpropyltriacetoxysilane, 3,3-dimethylbutyltrimethylsilane, methyl(2-trimethoxysilylethyl) ether, N-(2-trimethylsilyl-1-cyclohexenyl)pyrrolidine, N(2-trimethylsilylethyl)acetamide, N-(2-phenyldimethylsilylethenyl)phthalimide, 1,2-bis(trimethoxysilyl)propane, 2,3-bis(chlorodimethylsilyl)butane, 1,2-bis(chlorodimethylsilyl)cyclopentane, and 2,3-bis(chlorophenylmethylsilyl)norbornane. In the definitions of the general formulae given above, alkyl and alkoxy groups and relevant terms preferably include those having from 1 to 8 carbon atoms; and the aryl group and relevant terms are meant to include particularly a phenyl group, a substituted phenyl group, and a naphthyl group and the like. The present invention is illustrated by the Examples which follow. Example 1: An autoclave was charged with a mmole of 1,1,2,2,-tetramethyl-1,2-diphenyldisilane, 0.04 mmole of tetrakis(triphenylphosphine)platinum and 3 ml of benzene, and ethylene was then compressed into the autoclave at 5 atmospheric pressures. The autoclave was placed in an oil bath at 150°C and the content was reacted for 22 hours with magnetically stirring. Thereafter, the autoclave was allowed to cool and unreacted ethylene was discharged. The reaction mixture was analyzed by means of gas chromatography, thereby confirming the production of 0.22 mmole of 1,2-bis(dimethylphenylsilyl)ethane. The reaction mixture was then distilled under reduced pressures to give 0.13 mmole of 1,2-bis(dimethylphenylsilyl)ethane. The physical properties of this compound are as follows: b.p. 90°C/0.1 torr ²HNMR (CDCl₃): δ 0.23 (s, 12H, SiCH₃), 0.65 (s, 4H, CH₂), 7.2-7.6 ppm (m, 10H, C₆H₅) MS (70 eV): m/Z (relative intensity) 298 (M+, 7.2), 283 (17.6), 197 (10.8), 135 (100) Elemental analysis (C₁₈H₂₆Si₂): Calculated: C, 72.41%; H, 8.78% Found: C, 72.53%; H, 8.82%, Example 2: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out at 165°C for 21 hours, thereby yielding 0.38 mmole of 1,2-bis(dimethylphenylsilyl)ethane. Example 3: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out at 170°C using tetrakis(methyldiphenylphosphine)platinum as a catalyst, thereby yielding 0.29 mmole of 1,2-bis(dimethylphenylsilyl)ethane. Example 4: The procedure of Example 3 was repeated in the same manner with the exception that the reaction was carried out at 200°C, thereby yielding 0.60 mmole of 1,2-bis(dimethylphenylsilyl)ethane. Example 5: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of 1,2-dimethoxy-1,1,2,2-tetramethyldisilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.63 mmole of 1,2-bis(dimethoxydimethylsilyl)ethane by distillation of the reaction mixture. This compound has the following physical properties: b.p. 70°C/12 torr ²HNMR (CDCl₃): δ 0.02 (s, 12H, SiCH₃), 0.45 (s, 4H, CH₂), 3.33 (s, 6H, OCH₃) MS (70 eV): m/Z (relative intensity) 206 (M+, 1.5), 191 (22.9), 163 (21.5), 105 (15.4), 89 (100), 59 (56.1) Elemental analysis (C₈H₂₂Si₂): Calculated: C, 46.55%; H, 10.74% Found: C, 46.63%; H, 10.79% Example 6: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of 1,2-difluoro-1,1,2,2-tetramethyldisilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.93 mmole of 1,2-bis(fluorodimethylsilyl)ethane. Example 7: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of a mixture of 1,1,2-trichloro-1,2,2-trimethyldisilane and 1,1,2,2-tetrachloro-1,2-dimethyldisilane (3:7) in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.69 mmole of a mixture of 1-(chlorodimethylsilyl)-2-(dichloromethylsilyl)ethane and 1,2-bis(dichloromethylsilyl)ethane (4:6). Example 8: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of hexamethyldisilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.18 mmole of 1,2-bis(trimethylsilyl)ethane. Example 9: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of 1,2-dichloro-1,1,2,2-tetramethyldisilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.60 mmole of 1,2-bis(chlorodimethylsilyl)ethane. Example 10: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 0.04 mmole of tetrakis(triethylphosphine)platinum in place of tetrakis(triphenylphosphine)platinum, thereby yielding 0.12 mmole of 1,2-bis(dimethylphenylsilyl)ethane, 0.10 mmole of dimethylphenylvinylsilane, and 0.10 mmole of ethyldimethylphenylsilane. Example 11: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 0.04 mmole of tetrakis(dimethylphosphine)platinum in place of tetrakis(triphenylphosphine)platinum, thereby yielding 0.30 mmole of 1,2-bis(dimethylphenylsilyl)ethane, 0.21 mmole of dimethylphenylvinylsilane, and 0.16 mmole of ethyldimethylphenylsilane. Example 12: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 0.04 mmole of tetrakis(trimethylphosphine)platinum in place of tetrakis(triphenylphosphine)platinum, thereby yielding 0.33 mmole of 1,2-bis(dimethylphenylsilyl)ethane, 0.67 mmole of dimethylphenylvinylsilane, and 0.65 mmole of ethyldimethylphenylsilane. Example 13: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 0.04 mmole of ethylenebis(triphenylphosphine)platinum in place of tetrakis(triphenylphosphine)platinum, thereby yielding 0.03 mmole of 1,2-bis(dimethylphenylsilyl)ethane. Example 14: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of 1,1,2,2-tetramethyl-1,2-bis(p-trifluoromethylphenyl)disilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.16 mmole of 1,2-bis[dimethyl(p-trifluoromethylphenyl)silyl]ethane. This compound has the following physical properties: m.p. 58-59 °C ²HNMR (CDCl₃): δ 0.20 (s, 12H, SiCH₃), 0.58 (s, 4H, CH₂CH₂), 7.51 (s, 8H, C₆H₄) MS (70 eV): m/Z (relative intensity) 434 (M+, 6), 419 (13), 415 (8), 333 (4), 329 (2), 203 (100), 184 (55) Elemental analysis (C₈H₂₂Si₂): Calculated: C, 55.28%; H, 5.57% Found: C, 55.04%; H, 5.58% Example 15: The procedure of Example 1 was repeated in the same manner with the exception that the reaction was carried out using 1 mmole of 1,1,2,2-tetramethyl-1,2-bis(p-tolyl)disilane in place of 1,1,2,2-tetramethyl-1,2-diphenyldisilane, thereby yielding 0.04 mmole of 1,2-bis[dimetyl(p-tolyl)silyl]ethane. This compound has the following physical properties: MS (70 eV): m/Z (relative intensity) 326 (M+, 5), 312 (6), 311 (19), 225 (10), 162 (11), 150 (16), 149 (100) Example 16: The procedure of Example 6 was repeated in the same manner with the exception that the reaction was carried out at 100°C, thereby yielding 0.98 mmole of 1,2-bis(fluorodimethylsilyl)ethane. Example 17: The procedure of Example 6 was repeated in the same manner with the exception that 8.9 mmole of 1,2-difluoro1,1,2,2-tetramethyldisilane was used without a solvent, ethylene was charged at the pressure of 50 atmospheric pressures, and the reaction time was 18 hours, thereby distilling and yielding 6.0 mmole of 1,2-bis(fluorodimethylsilyl)ethane. Example 18: The procedure of Example 9 was repeated in the same manner with the exception that the reaction was carried out at 120°C, thereby yielding 0.87 mmole of 1,2-bis(chlorodimethylsilyl)ethane. Example 19: The procedure of Example 9 was repeated in the same manner with the exception that the reaction was carried out at 100°C, thereby yielding 0.79 mmole of 1,2-bis(chlorodimethylsilyl)ethane. Example 20: The procedure of Example 16 was repeated in the same manner with the exception that a flask equipped with a balloon of an atmospheric pressure of ethylene was used in place of the autoclave. The resulting mixture was stirred with a 0.6M etheric solution of phenyllithium for 2 hours, thereby yielding 0.74 mmole of 1,2-bis(dimethylphenylsilyl)ethane. Example 21: A pressure reactor was charged with 1 mmole of 1,2-difluorotetramethyldisilane, 5 mmole of styrene, 0.04 mmole of tetrakis(triphenylphosphine)platinum, and 3 ml of benzene, and the reactor was placed in an oil bath at 150 °C. The content was stirred magnetically for 22 hours. After the reactor was allowed to cool, it was opened. The reaction mixture was then analyzed by means of gas chromatography, thereby confirming the formation of β-E-(fluorodimethylsilyl)styrene, β-Z-(fluorodimethylsilyl)styrene, β-(fluorodimethylsilyl)ethylbenzene, and α,β-bis(fluorodimethylsilyl)ethylbenzene, the latter having the following physical properties: MS (EI): m/Z (relative intensity) 258 (M+, 4), 181 (11), 165 (5), 162 (25), 147 (36), 139 (4), 135 (6), 77 (100), 49 (14), 47 (10) The resulting reaction mixture was treated with a 0.6M etheric solution of phenyl lithium for 2 hours, thereby yielding 0.80 mmole of β-E-(dimethylphenylsilyl)styrene, 0.11 mmole of β-Z-(dimethylphenylsilyl)styrene, 0.10 mmole of β-(dimethylphenylsilyl)ethylbenzene, and 0.04 mmole of α,β-bis(dimethylphenylsilyl)ethylbenzene. α,β-Bis(dimethylphenylsilyl)ethylbenzene has the following physical property: MS (EI): m/Z (relative intensity) 374 (M+, 2), 224 (11), 209 (3), 197 (5), 162 (26), 147 (4), 146 (5), 135 (100), 107 (5), 105 (6), 43 (9) Example 22: The procedure has been followed in the same manner as in Example 21 with the exception that 1-hexene was used in place of styrene and thereafter the resulting mixture was stirred with a 0.6M etheric solution of phenyl lithium for 2 hours, thereby yielding 0.55 mmole of 1-(dimethylphenylsilyl)-1-hexene, 0.38 mmole of 1-E-(dimethylphenylsilyl)-1-hexene, 0.18 mmole of 1-Z-(dimethylphenylsilyl)-1-hexene, and 0.09 mmole of 1,1-bis(dimetylphenylsilyl)hexene. 1,1-Bis(dimethylphenylsilyl)hexene has the following physical property: MS (EI): m/Z (relative intensity) 339 (M-15+, 21), 276 (9), 203 (14), 197 (21), 189 (9), 135 (100), 121 (18), 114 (11) Example 23: The procedure has been followed in the same manner as in Example 21 with the exception that the reaction was carried out at 100°C, and then the product was treated with phenyl lithium in the same manner, thereby yielding 0.48 mmole of β-E-(dimethylphenylsilyl)styrene, 0.3 mmole of β-Z-(dimethylphenylsilyl)styrene, 0.15 mmole of β-(dimethylphenylsilyl)ethylbenzene, and 0.04 mmole of α, β-bis(dimethylphenylsilyl)ethylbenzene. Example 24: The procedure has been followed in the same manner as in Example 21 with the exception that norbornene was used in place of styrene, thereby yielding 0.26 mmole of 2-exo-3-exo-bis(fluorodimethylsilyl)norbornane. This compound has the following physical property: MS (EI): m/Z (relative intensity) 233 (M-15+, 5), 171 (6), 152 (25), 1 37 (7), 124 (61), 109 (23), 105 (13), 93 (13), 77 (100) This compound was then treated with methyl lithium, thereby yielding 0.19 mmole of 2-exo-3-exo-bis(trimethylsilyl)norbornane. This compound has the following physical properties: b.p. 80 - 90°C/28mm High-Resolving Power MS: M⁺ 240.1736 Calculated (as C₁₃H₂₈Si₂): 240.1729 MS (EI): m/Z (relative intensity) 240 (M+, 2), 167 (11), 151 (3), 131 (6), 124 (5), 109 (3), 101 (2), 73 (100) ¹H-NMR (200MHz, C₆D₆): δ 0.14 (s, 18H, SiCH₃) 0.89 (d, J=1.7 Hz, 2H, SiCH) 1.05-1.38 (m, 4H, methylene CH₂, ethylene CH (endo)) 1.61-1.73 (m, 2H, ethylene CH(exo)) 2.25-2.33 (m, 2H, bridge head CH) ppm ¹³CNMR (C₆D₆): δ 0.5 (SiCH₃), 34.3, 36.0, 38.4, 40.1 (norbornane) ppm Example 25: The procedure has been followed in the same manner as in Example 21 with the exception that cyclopentene was used, thereby yielding 0.19 mmole of 1,2-bis(fluorodimethylsilyl)cyclopentane. This compound has the following physical property: MS (EI): m/Z (relative intensity) 207 (M-15⁺, 5), 144 (2), 129 (13), 126 (28) 118 (11), 111 (11), 98 (13), 85 (23), 77 (100), 66 (93), 59 (36), 49 (21), 47 (14) Example 26: The procedure has been followed in the same manner as in Example 21 with the exception that ethyl acrylate was used in place of styrene, thereby yielding 0.33 mmole of ethyl fluorodimethylsilylacrylate and 0.19 mmole of ethyl fluorodimethylsilylpropionate. Example 27: The procedure has been followed in the same manner as in Example 21 with the exception that acrylonitrile was used in place of styrene, thereby yielding 0.19 mmole of fluorodimethylsilylacrylonitrile. Example 28: The procedure has been followed in the same manner as in Example 21 with the exception that propylene was used in place of styrene, thereby yielding 0.04 mmole of trans-1-propenylfluorodimethylsilane, 0.06 mmole of propylfluorodimethylsilane, and 0.06 mmole of 1,2-bis(fluorodimethylsilyl)propane.

Claims: A process for preparing an organosilicon compound having a Si-C-C-Si bond, a C=C-Si bond and/or a CH-CH-Si bond, comprising the step of (a) reacting an olefin compound represented by the following general formula (I): R¹R²C=CHR³ (I) wherein R¹, R² and R³ are each hydrogen atom, an alkyl group, a cycloalkyl group, an aliphatic heterocyclic group, an aralkyl group, an aryl group, an aromatic heterocyclic group, an alkoxycarbonyl group, a cyano group, an N,N-dialkylaminocarbonyl group, an alkoxy group, an N,N-dialkylamino group, an N-alkyl-N-acylamino group or an N,N-diacylamino group, and may link with each other to form a cyclic structure, with a disilane represented by the following general formula (II): R⁴R⁵R⁶Si-SiR⁷R⁸R⁹ (II) wherein R⁴, R⁵, R⁶, R⁷, R⁸ and R⁹ are each an alkyl group, a cycloalkyl group, an aryl group, an aralkyl group, an alkoxy group, an acyloxy group, an N,N-dialkylamino group, fluorine atom, bromine atom or chlorine atom, and may link with each other to form a cyclic structure, in the presence of a platinum-containing catalyst. A process as claimed in claim 1, wherein the olefin compound and the disilane are used in amounts providing a molar ratio of the former to the latter ranging from 100:1 to 1:10. A process as claimed in claim 1 or claim 2, wherein the platinum-containing catalyst is used in an amount ranging from 0.00001 to 0.5 mole per mole of the disilane used. A process as claimed in any preceding claim, further comprising the step of (b) treating the product obtained in step (a) with an alkyl lithium, an aryl lithium or Grignard reagent.

Inventors: HAYASHI TERUYUKI, KOBAYASHI TOSHIAKI, TANAKA MASATO, HAYASHI, TERUYUKI, KOBAYASHI, TOSHIAKI, TANAKA, MASATO
Applicants: AGENCY IND SCIENCE TECHN, DIRECTOR-GENERAL OF THE AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY
Application year: 1990
Main classification: C07F7
IPC codes: C07B61, B01J31, C07F7