Patent ID: 7112710
Filing Date: 2006-09-26
Classification: C07F

Abstract:
1. A process for preparing a disilyl ketene acetal of the general formula (7), comprising the step of reacting a silyl ketene acetal of the general formula (6) with a hydrosilane or hydrosiloxane of the general formula (2) in the presence of a catalytic amount of tris(pentafluorophenyl)borane, wherein R 9 and R 10 are each independently hydrogen or a substituted or unsubstituted monovalent hydrocarbon group of 1 to 60 carbon atoms, or a pair of R 9 and R 10 may bond together to form a ring of 3 to 20 carbon atoms with the carbon atom to which they are attached, R 11 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 40 carbon atoms, R d , R e and R f are independently selected from a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, an organoxy group of 1 to 20 carbon atoms, an organo(poly)siloxy group of 1 to 1,000 silicon atoms, and a halogen atom, or a pair of R d and R e , R d and R f , or R e and R f may bond together to form a siloxane ring of 3 to 50 silicon atoms or a silicon-containing ring of 1 to 20 carbon atoms with the silicon atom to which they are attached, or R d , R e and R f may bond together to form a cage siloxane of 6 to 50 silicon atoms with the silicon atom to which they are attached, wherein R a , R b and R c are independently selected from a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, an organoxy group of 1 to 20 carbon atoms, an organo(poly)siloxy group of 1 to 1,000 silicon atoms, and a halogen atom, or a pair of R a and R b , R a and R c , or R b and R c may bond together to form a siloxane ring of 3 to 50 silicon atoms or a silicon-containing ring of 1 to 20 carbon atoms with the silicon atom to which they are attached, or R a , R b and R c may bond together to form a cage siloxane of 6 to 50 silicon atoms with the silicon atom to which they are attached, wherein R 9 , R 10 , R a , R b , R c , R d , R e and R f are as defined in formulae (6) and (2).