Patent ID: 6852661

Claim:
A catalyst comprising at least one complex of a metal of transition group VIII comprising at least one monodentate, bidentate or multidentate phosphinamidite ligand of the formulae I.1, I.2 and/or I. 3 where A 1 represents carbon ring members which, together with the phosphorus atom and the oxygen atom to which it is bound, form a 5- to 8-membered heterocycle which optionally has one, two or three fused-on cycloalkyl, aryl and/or heteroaryl groups, where each of the fused-on groups optionally carries, independently of one another, one, two or three substituents selected from the group consisting of alkyl, alkoxy, halogen, nitro, cyano, carboxyl and carboxylate, A 2 and A 3 are, independently of one another, carbon ring members which are part of a heterocycle as defined for A 1 which is substituted by B, X 1 is a 5- to 8-membered heterocycle which contains a nitrogen atom bound directly to the phosphorus atom, where the heterocycle optionally contains one or two additional heteroatom(s) selected from the group consisting of N, O and S, and/or has one, two or three fused-on cycloalkyl, aryl and/or heteroaryl groups, where the heterocycle and/or each of the fused-on groups optionally carries, independently of one another, one, two or three substituents selected from the group consisting of alkyl, cycloalkyl, aryl, alkoxy, cycloalkoxy, aryloxy, acyl, halogen, trifluoromethyl nitro, cyano, carboxyl, carboxylate, alkoxycarbonyl and NE 1 E 2 , where E 1 and E 2 are identical or different and are each alkyl, cycloalkyl or aryl, X 2 and X 3 are, independently of one another, a heterocycle as defined for X 1 which is substituted by B, B is either a carbon-carbon single bond or a divalent bridging group, or salts or mixtures thereof.