Process for preparation of .beta.-cyanoalkylsilanes using ruthenium catalyst
AssigneeDow Corning Corporation
InventorHoward M. Bank
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Abstract
The present invention is a process for the preparation of hydrolyzable .beta.-cyanoalkylsilanes. More particularly, this invention relates to the catalytic addition of organohydrosilane to .alpha.,.beta.-unsaturated olefinic nitriles to form B-cyanoalkylsilanes. The present process employs a catalyst comprising a ruthenium compound. The preferred catalyst for the present process is a ruthenium compound having at least one tertiary phosphine ligand. The process is conducted at a temperature within a range of about 50.degree. C. to 300.degree. C.
Claims18
A process for preparation of .beta.-cyanoalkylsilanes described by formula ##STR3## the process comprising:
- contacting a mixture comprising an organohydrosilane described by formula
- R.sub.a X.sub.b SiH.sub.4-a-b
- and an olefinic nitrile described by formula ##STR4## with an effective concentration of a ruthenium compound catalyst at a temperature within a range of about 50.degree. C. to 300.degree. C.;
- where each Y is independently selected from a group consisting of hydrogen and alkyl radicals comprising one to eight carbon atoms;
- each R is a radical independently selected from a group consisting of alkyls comprising one to 12 carbon atoms, cycloalkyls comprising one to eight carbon atoms, aryls, alkoxys comprising one to 12 carbon atoms, and aryloxys;
- X is a halogen;
- a=1 or 2;
- b=1 or 2;
- and a +b=2 or 3.
Dependencies are inferred from the claim text.