Patent ID: 7619108

Claim:
A process for preparing unsaturated organosilanes containing organic carbonyloxy groups and having the formula (R 1 O) 3-n R 2 n Si—X—OC(O)C(R 3 )═CR 3 2 (I), where R 1 are identical or different monovalent, substituted or unsubstituted C 1-10 hydrocarbon radicals optionally interrupted by oxygen atoms, R 2 are identical or different monovalent, SiC-bonded, substituted or unsubstituted C 1-10 hydrocarbon radicals optionally interrupted by oxygen atoms or a sil(oxan)yl radical, X each are divalent, substituted or unsubstituted C 1-40 hydrocarbon radicals optionally interrupted by oxygen atoms, R 3 are identical or different and are a hydrogen atom or a monovalent, substituted or unsubstituted C 1-40 hydrocarbon radical optionally interrupted by oxygen atoms, and n is 0, 1, 2 or 3, comprising reacting haloorganofunctional silicon compounds of the formula (R 1 O) 3-n R 2 n Si—X—Y (II), where Y is a halogen atom, with a salt of an unsaturated organic carboxylic acid of the formula M[OC(O)C(R 3 )═CR 3 2 ] o (III), where R 3 is as defined above, M is an alkali metal atom or alkaline earth metal atom and o is 1 or 2 depending on the valence of M, in the presence of at least one tertiary phosphine of the formula IV R 4 3 P (IV) where the radicals R 4 are identical or different monovalent C 1-20 hydrocarbon radicals.