Patent ID: 7923581

Claim:
A process for producing a biarylphosphine compound comprising a step of subjecting a biarylsulfonate compound represented by general formula (1) to coupling reaction with a hydrogen-phosphine compound represented by general formula (2) in the presence of a catalyst and an organic strong base to obtain a biarylphosphine compound represented by general formula (3), wherein Biaryl represents a biaryl group, a substituted biaryl group, a biaryl heterocyclic group or a substituted biaryl heterocyclic group; E represents a sulfonate which is a leaving group, and n is an integer of 1 or more; H—PR 1 R 2 (2) wherein R 1 and R 2 represent a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an aralkyl group, a substituted aralkyl group, an aliphatic heterocyclic group or a substituted aliphatic heterocyclic group, and R 1 and R 2 may be the same or different from each other or may be linked to each other to form a bond; wherein Biaryl, R 1 , R 2 and E are the same as above; m is 1 or more, l is 0 or more, m and 1 each are an integer satisfying m+l=n, and n is the same as above; and wherein the organic strong base has the following structure: