Patent ID: 6815518
Filing Date: 2004-11-09
Classification: C07F,C08G,C10M

Abstract:
A method of carrying out a hydrosilylation reaction of synthons with at least one polyorganohydrosiloxane, comprising the step of: reacting the synthons, which are different or identical, and comprise at least one hydrocarbon ring in which is included an oxygen atom, with the polyorganosiloxane, in the presence of a catalytic metal complex of formula I: wherein: M represents a metal in the 0 oxidation state chosen from the metals of group 8 of the Periodic Table as published in Handbook of Chemistry and Physics, 65th edition, 1984-1985; X represents O, NRa or CRfRg; Y1 and Y2, which are identical or different, represent CRbRc or SiRdRe; R1, R2, R5 and R6, which are identical or different, are a hydrogen atom, an alkyl group or an aryl group optionally substituted with alkyl; R3, R4, Ra, Rb, Rc, which are identical or different, are a hydrogen atom; an alkyl group; an acyl group; an aryl group optionally substituted with an alkyl; a cycloalkyl optionally substituted with an alkyl; or an arylalkyl group in which the aryl component is optionally substituted with alkyl; Rd and Re, which are identical or different, are an alkenyl group; an alkynyl group; an alkyl group; an alkoxy group; an acyl group; an aryl group optionally substituted with an alkyl; a cycloalkyl group optionally substituted with an alkyl; or an arylalkyl group in which the aryl component is optionally substituted with alkyl; or else when Y1 and Y2, which are identical or different, represent SiRdRe, two groups Rd linked to two different silicon atoms together form: a chain of formula: â€ƒwherein n is an integer from 1 to 3; X is as defined above; R and Râ€², which are identical or different, take any one of the meanings given above for Re, with the proviso that, when n is 2 or 3, a single silicon atom of said chain is substituted with one or two alkenyl or alkynyl groups; a saturated hydrocarbon chain, the two groups Rd together with said silicon atoms and X forming a 6- to 10-membered ring; or else, when Y1 and Y2, which are identical or different, represent CRbRc, two groups Rb linked to different carbon atoms together form a saturated hydrocarbon chain, the two groups Rb together with the carbon atoms which bear them and X forming a 6- to 10-membered ring; Rf and Rg represent, independently of one another, a hydrogen atom; an alkyl group; an acyl group; an aryl group optionally substituted with alkyl; a cycloalkyl group optionally substituted with alkyl; an arylalkyl group in which the aryl component is optionally substituted with an alkyl; a halogen atom; an alkenyl group; an alkynyl group; or a group SiG1G2G3 wherein G1, G2 and G3 are, independently of one another, an alkyl; an alkoxy; an aryl optionally substituted with an alkyl or an alkoxy; or an arylalkyl wherein the aryl component is optionally substituted with an alkyl or an alkoxy; L represents a carbene of formula II: â€ƒwherein: A and B, which are identical or different, represent C or N, with the proviso that, when A represents N, then T4 represents nothing and when B represents N, then T3 represents nothing; T3 and T4, which are identical or different, represent a hydrogen atom; an alkyl group; a cycloalkyl group optionally substituted with an alkyl or an alkoxy; an aryl group optionally substituted with an alkyl or an alkoxy; an alkenyl group; an alkynyl group; or an arylalkyl group wherein the aryl component is optionally substituted with alkyl or alkoxy; T1 and T2, which are identical or different, represent (i) an alkyl group; (ii) a perfluorinated alkyl group or an alkyl group optionally substituted with a perfluoroalkyl group; (iii) a cycloalkyl group optionally substituted with an alkyl or alkoxy group; (iv) an aryl group optionally substituted with an alkyl or alkoxy group; (v) an alkenyl group; (vi) an alkynyl group; or (vii) an arylalkyl group wherein the aryl component is optionally substituted with an alkyl or alkoxy group; or else T1 and T2, which are identical or different, represent a monovalent radical of formula (V) below: â€”V1â€”V2â€ƒâ€ƒ(V) â€ƒwherein: V1 is a divalent hydrocarbon radical, V2 is a monovalent radical selected from the group consisting of: alkoxy, â€”OR&ugr; with R&ugr; being hydrogen, alkyl, or aryl; and amine, or else alternatively, T1 and T2, independently represent a monovalent radical of formula (W) below: â€”W1&ohgr;â€”W2â€ƒâ€ƒ(W) â€ƒwherein: W1 is a divalent hydrocarbon radical, &ohgr; represents: â€”R&agr;C&boxH;CR&agr;â€”, with R&agr; being H, an alkyl group or â€”C&boxH;Câ€”W2 is a monovalent radical selected from the group consisting of: R&bgr;=alkyl, H; Si-alkyl; Si-alkoxy; alcohol; ketone; carboxy; amide; and acyl; or else alternatively the substituents T1, T2, T3 and T4 form, in pairs, when they are located at two adjacent points in formula II, a saturated or unsaturated hydrocarbon chain.