PROCESS FOR PREPARATION OF DIPHOSPHINE COMPOUNDS AND INTERMEDIATES FOR THE PROCESS

摘要

A process for preparation of compounds represented by the general formula (I) or salts thereof: (I) [wherein R1a, R1b, R1c, R1d, R1e, R1f, R2a, R2b, R2c, R2d, R2e, and R2f are each independently hydrogen or the like; and R3, R4, R5, R6, R7, R8, R9, and R10 are each independently hydrogen or the like], characterized by reacting a compound represented by the general formula (II) or a salt thereof: (II) [wherein X is a leaving group] with a phosphine−borane complex represented by the general formula (III) or a salt thereof: (III) in the presence of an amine and a nickel catalyst in a solvent.