process for the production of silanen with a tertiary hydrocarbon group in the alpha position of the silicon atom

摘要

The invention relates to a process for the preparation of silanes of the general formula 1RmR1nSiX4-m-n(1)by reaction of Grignard reagents of the general formula 2R1MgX1(2)with silanes of the general formula 3RmSiX4-m(3)wherein R denotes C1- to C10-hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals, R1, in the alpha -position relative to the silicon atom, denotes tertiary C4- to C30-hydrocarbon radicals optionally substituted by fluorine, chlorine or cyano radicals, X and X1 each denote chlorine, bromine or iodine, m denotes the values 2 or 3 and n denotes the values 1 or 2, in the presence of a transition metal catalyst and an inert, aprotic, and chelating compound.