Patent ID: 6440891
Filing Date: 2002-08-27
Classification: B01J,C07C,C07F

Abstract:
A catalyst comprising at least one rhodium complex with a phosphonite ligand of formula I whereinR1 is a C3-C6-chain wherein the carbon atoms are connected through single bonds or through single bonds and from 1 to 3 double bonds, which chain is optionally fused with from 1 to 3 rings selected from the group consisting of aryl and hetaryl, wherein the rings are unsubstituted or carry from 1 to 3 substituents selected from the group consisting of alkyl, cycloalkyl, aryl, alkoxy, cycloalkyloxy, aryloxy, halogen, trifluoromethyl, nitro, cyano, carboxyl and NE1E2, E1 and E2 are identical or different and each is alkyl, cycloalkyl or aryl, m is 0 or 1, and the moieties and are identical or different and denote each a 5- to 8-membered heterocycle which is optionally fused with from 1 to 3 rings selected from the group consisting of cycloalkyl, aryl and hetaryl, wherein the rings are unsubstituted or carry from 1 to 3 substituents selected from the group consisting of alkyl, alkoxy, halogen, nitro, cyano and carboxyl,or a salt thereof.