Process for the carbonylation of a conjugated diene

摘要

A process for the carbonylation of a conjugated diene, comprising reacting the conjugated diene with carbon monoxide and a co-reactant having an active hydrogen atom in the presence of a catalyst system including: (a) a source of palladium; and (b) a bidentate diphosphine ligand of formula (II): R<1> > P<1> -R- P<2> < R<2>R<3> wherein P<1> and represent phosphorus atoms; R<1> represents an optionally substituted divalent organic group linked to the phosphorus atom by two tertiary carbon atoms; and R<2> and R<3> independently represent univalent groups of from 1 to 20 atoms containing a tertiary carbon atom through which each group is linked to the phosphorus atom, or R<2> and R<3> jointly form an optionally substituted divalent organic group containing at least 2 tertiary carbon atoms through which the group is linked to the phosphorus atom; and R represents a divalent bridging group comprising 3 atoms through which P<1> is linearly connected to P<2>;and (c) a source of an anion.