Process for preparation of silyl ketene acetals

Details Process for preparation of silyl ketene acetals Process for preparation of silyl ketene acetals

1992-07-13

1993-05-04

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556443, 556444, 556448, C07F 708, C07F 718

Patent

active

052083586

ABSTRACT:
The present invention is a process for preparation of silyl ketene acetals. The process comprises contacting a mixture containing an organosilane having a silicon-bonded hydrogen (organohydrosilane) and a vinylic compound with RhCl(di-tert-butylsulfide).sub.2 as catalyst at a temperature within a range of about 20.degree. C. to 100.degree. C. The RhCl(di-tert-butylsulfide).sub.2 catalyst demonstrates higher activity than that typically described for rhodium catalysts, allowing for lower concentrations of catalyst and lower reaction temperatures to be used while maintaining high conversion to the desired silyl ketene acetals.

REFERENCES:
patent: 4746750 (1988-05-01), Neirs
patent: 4824981 (1989-04-01), Schulz et al.
E. Yoshii et al., Chem. Pharm. Bull. Jap. 22:2767-2769 (1974).
I. Ojima et al., J. Organometallic Chem. 111:43-60 (1976).
J. Howe et al. J. Organometallic Chem. 208:401-406 (1981).

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