Patent ID: 6156918
Filing Date: 2000-12-05
Classification: C07F

Abstract:
A process for the preparation of a silane of the general formula 1R.sub.m R.sup.1.sub.n SiX.sub.4-m-n ( 1)by reaction of a Grignard reagent of the general formula 2R.sup.1 MgX.sup.1 ( 2)with a silane of the general formula 3R.sub.m SiX.sub.4-m ( 3)whereinR denotes C.sub.1 - to C.sub.10 -hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals,R.sup.1, in the .alpha.-position relative to the silicon atom, denotes tertiary C.sub.4 - to C.sub.30 -hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals,X and X.sup.1 each denote chlorine, bromine or iodine,m denotes the values 2 or 3 andn denotes the values 1 or 2,in the presence of a transition metal catalyst and an inert, aprotic, and chelating compound.