Process for the preparation of alkylsilanes with bulky alkyl radicals

US6169196A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Gilbert Geisberger · Altötting, DE
• Tassilo Lindner · Mehring, DE
• Rudolf Reitmeier · Burghausen, DE

Key dates

• Filing date: Jan 28, 2000
• Grant date: Jan 2, 2001
• Expiry date: Jan 28, 2020

Classification

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

Abstract

A process for the preparation of di- and trialkylsilanes of the general formula (I) EQU R.sub.a R.sup.1.sub.b SiX.sub.c (I), in which mono- or dialkylsilanes of the general formula (II) EQU R.sup.1.sub.b SiH.sub.a X.sub.c (II) are reacted with alkenes A which have at least 3 carbon atoms and are optionally substituted by fluorine, chlorine or bromine atoms or cyano groups, in the presence of a transition metal catalyst and a trihalogenosilane of the general formula (III) EQU R.sup.2 SiY.sub.3 (III) as an activator, wherein, in the above general formulae (I) to (III), PA1 R is a branched or cyclic hydrocarbon radical having at least 3 carbon atoms, optionally substituted by fluorine, chlorine, or bromine, or cyano groups, PA1 R.sup.1 is an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, PA1 R.sup.2 is a hydrogen atom, or an alkyl radical optionally substituted by fluorine, chlorine, or bromine, or cyano groups, PA1 X is fluorine, chlorine, or bromine, or an alkoxy radical having 1 to 18 carbon atoms optionally substituted by fluorine, chlorine, or bromine, or cyano groups, PA1 Y is fluorine, chlorine or bromine, PA1 a is 1 or 2, PA1 b is 1 or…