Patent ID: 6339161
Filing Date: 2002-01-15
Classification: C07D,C07F,C08F

Abstract:
A ligand of formula I: wherein W is selected from the group consisting of a sulfur atom, an oxygen atom and a phosphorus atom; Y and Z are independently selected from the group consisting of a carbon atom, a phosphorus atom and a sulfur atom; when Y is phosphorus m is 2, when Y is carbon or sulfur m is 1; when Z is phosphorus n is 2, when Z is carbon or sulfur n is 1; each R is independently selected from the group consisting of a hydrogen atom, and a hydrocarbyl radical or R taken together with Q may form a cyclic hydrocarbyl; R1 and R2 are independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted hydrocarbyl radical which may contain one or more heteroatoms which may be bonded directly or indirectly to the nitrogen atoms and a tri-C1-4 alkyl silyl radical; Q is a divalent unsaturated hydrocarbyl radical or a divalent radical comprising hydrogen, carbon and one or more heteroatoms selected from the group consisting of an oxygen atom, a nitrogen atom, a sulfur atom and a boron atom, and Q when taken together with W forms one or more unsaturated rings, which unsaturated cyclic rings may be unsubstituted or may be fully substituted by one or more substituents independently selected from the group consisting of a halogen atom and an alkyl radical.