Patent ID: 6815554
Filing Date: 2004-11-09
Classification: C07F

Abstract:
A process for preparing unsaturated organosilanes containing organic carbonyloxy groups and having the formula(R1O)3âˆ’nR2nSiâ€”Xâ€”OC(O)C(R3)&boxH;CR32â€ƒâ€ƒ(I), whereR1 may be identical or different and are each a monovalent, substituted or unsubstituted hydrocarbon radical which has from 1 to 10 carbon atoms optionally interrupted by oxygen atoms, R2 may be identical or different and are each a monovalent, SiC-bonded, substituted or unsubstituted hydrocarbon radical which has from 1 to 10 carbon atoms optionally interrupted by oxygen atoms, or a sil(oxan)yl radical, X is a divalent, substituted or unsubstituted hydrocarbon radical which has from 1 to 40 carbon atoms optionally interrupted by oxygen atoms, R3 may be identical or different and are each a hydrogen atom or a monovalent, substituted or unsubstituted hydrocarbon radical which has from 1 to 40 carbon atoms optionally interrupted by oxygen atoms, and n is 0, 1, 2 or 3, by reacting haloorganofunctional silicon compounds of the formula (R1O)3âˆ’nR2nSiâ€”Xâ€”Yâ€ƒâ€ƒ(II), where R1, R2, X and n are as defined above and Y is a halogen atom, with a salt of an unsaturated organic carboxylic acid of the formula M+[âˆ’OC(O)C(R3)&boxH;CR32]oâ€ƒâ€ƒ(III), whereR3 is as defined above, M is an alkali metal or alkaline earth metal and o can be 1 or 2 depending on the valence of M, in the presence of a phosphonium salt as phase transfer catalyst, and in the presence of a polar, aprotic solvent.