Process for the preparation of organosilanes containing...

Details Process for the preparation of organosilanes containing... Process for the preparation of organosilanes containing...

C - Chemistry, Metallurgy

07

F

C07F 7/18 (2006.01)

Patent

CA 2054411

23443-460 ABSTRACT A novel process for the preparation of organosilanes containing methacryloyloxy or acryloyloxy groups of the general formula I Image (I) in which R1 represents a hydrogen atom or a methyl group, R2 represents an alkyl radical having 1 to 4 C atoms, R3 represents an alkyl group having 1 to 4 C atoms or an alkoxyalkyl group having a total number of C atoms of 2 to 4, m represents 0, 1 or 2 and n represents 1, 3 or 4, by reacting alkali metal meth- acrylates or acrylates with haloalkylsilanes of the general formula II Image (II) in which R2, R3, m and n are as defined above and Hal represents chlorine or bromine. The process is carried out at a temperature of from 80 to 150°C in the presence of quaternary pyridinium halides as a phase transfer catalyst. Because of the use of the pyridinium salts as phase transfer catalysts, the reaction rate is consideraly increased and the reaction temperature and time considerably reduced, compared with the similar known processes.

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