13617-28-2Relevant academic research and scientific papers
Effect of the substituents at the silicon of (ω-chloroalkyl)silanes on the alkylation to benzene
Yoo, Bok Ryul,Hyun Kim, Jeong,Lee, Ho-Jin,Lee, Kang-Bong,Nam Jung, Il
, p. 239 - 245 (2007/10/03)
(ω-Chloroalkyl)silanes [Cl3-mMemSi(CH2)n-Cl: m=0-3, n=1-3] underwent Friedel-Crafts alkylation with benzene in the presence of aluminum chloride to give alkylated products. Such alkylation reactions took place at temperatures ranging from room temperature (m=0-1, n=2, 3; m=3, n=1) to 80 (m=1, 2; n=1) and 200°C (m=0; n=1), depending on the substituent(s) of the silicon and the alkylene-chain spacer between the silicon and C-Cl bond of (ω-chloroalkyl)silanes. In the alkylation to benzene, the reactivities of (ω-chloroalkyl)silanes increase as the number (m) of methyl-group(s) at the silicon and the alkylene length between the silicon and C-Cl bond increases. While decomposition of alkylation products was observed at two more methyl groups substituted at silicon in the cases of (chloromethyl)silanes such as (chloromethyl)dimethylchlorosilane and (chloromethyl)trimethylsilane. The reaction with (chloromethyl)trimethylsilane occurred at room temperature to give trimethylchlorosilane, toluene and xylene via a decomposition reaction of the products. No (trimethylsilylmethyl)benzene was formed. In the alkylation to benzene, the reactivity of (ω-chloroalkyl)silanes decreases in the following order: m=3>2>1>0; n=3>2?1. The results are consistent with the stability of the carbocation generated by the complexation of (ω-chloroalkyl)silanes with aluminum chloride.
Hydrosilylation of 2-Phenylpropene with dichloromethylsilane and transformations of the resulting adduct
Yarosh
, p. 1555 - 1556 (2007/10/03)
2-Phenylpropene was hydrosilylated with dichloromethylsilane in the presence of H2PtCl6 to synthesize dichloromethyl(2-phenylpropyl)silane. The latter was reacted with methanol in the presence of carbamide to obtain dimethoxymethyl(2-phenylpropyl)silane, whose reaction with methylmagnesium iodide gave methoxydimethyl(2-phenylpropyl)silane. Treatment of the latter with 40% HF gave fluorodimethyl(2-phenylpropyl)silane which was reacted with BrMgC≡CH to obtain dimethylethynyl(2-phenylpropyl)silane.
Process for the preparation of organosilicon compounds
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, (2008/06/13)
This invention relates to the preparation of organosilicon compounds by the addition of a silicon compound containing Si-bonded hydrogen to a compound having an aliphatic multiple bond in the presence of a catalyst which promotes the addition of Si-bonded hydrogen to compounds containing an aliphatic multiple bond. In this process the reactants and the catalyst are continuously introduced into a pipe-shaped reactor while the contents of the reactor, which are maintained in a liquid phase by the application of pressure are circulated in the reactor at a rate of at least 1,000 cm per minute and while the reaction mixture is continuously being removed from the reactor.
