Patent ID: 6348612
Filing Date: 2002-02-19
Classification: B01J,C07B,C07F

Abstract:
A compound of general formula (I): whereinR1 is C3-8-cycloalkyl, aryl-C1-4-alkyl, or branched C3-8-alkyl, R2 is C1-8-alkyl, C3-8-cycloalkyl, aryl-C1-4-alkyl or aryl, R3 and R4 each independently are C1-8-alkyl, C3-8-cycloalkyl, aryl-C1-4- alkyl, aryl or heteroaryl or R3 and R4 together with a phosphorus atom are a 9-dibenzophospholyl, 9- phosphabicyclononyl or 9- phosphabicyclononyl group, * denotes a chiral center, and each R3 is identical to the other, and each R4 is identical to the other.