Process for preparing alkylsilanes having bulky alkyl radicals

US5663400A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Rudolf Reitmeier · Burghausen, DE
• Hermann Braunling · Munich, DE
• Tassilo Lindner · Mehring, DE
• Hartmut Menzel · Munich, DE

Key dates

• Filing date: Mar 6, 1996
• Grant date: Sep 2, 1997
• Expiry date: Mar 6, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Di- and trialkylsilanes of the formula EQU R.sub.a R.sup.1 R.sup.2.sub.b SiX.sub.c (I), which comprises reacting mono- and dialkylsilanes of the formula EQU R.sup.1 R.sup.2.sub.b SiH.sub.a X.sub.c (II), with alkenes A having at least 4 carbon atoms, which alkenes are unsubstituted or substituted by fluorine, chlorine or bromine atoms or cyano groups, in the presence of a transition metal catalyst and a hydrocarbon as activator, which hydrocarbon has at least one functional group selected from among aldehyde, keto and epoxy groups or halogen atoms, where in the above formulae (I) and (II), PA1 R is a branched or cyclic hydrocarbon radical having at least 4 carbon atoms, which radical is unsubstituted or substituted by fluorine, chlorine or bromine atoms or cyano groups, PA1 R.sup.1 is an alkyl radical having at least 2 carbon atoms, which radical is unsubstituted or substituted by fluorine, chlorine or bromine atoms or cyano groups, PA1 R.sup.2 is a hydrocarbon radical having at least 2 carbon atoms, which radical is unsubstituted or substituted by fluorine, chlorine, or bromine atoms or cyano groups, PA1 X is a fluorine, chlorine or bromine atom or an alkoxy radical having from 1 t…