Process for Preparation of Diphosphine Compounds and Intermediates for the Process

摘要

A production method of a compound represented by the formula wherein R^1a, R^1b, R^1c, R^1d, R^1e, R^1f, R^2a, R^2b, R^2c, R^2d, R^2e and R^2f are the same or different and each is a hydrogen atom and the like, and R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹ and R¹⁰ are the same or different and each is a hydrogen atom and the like, or a salt thereof, which comprises reacting a compound represented by the formula wherein X is a leaving group and other symbols are as defined above, or a salt thereof, with a phosphine-borane complex represented by the formula wherein the symbols are as defined above, or a salt thereof, in a solvent in the presence of an amine and a nickel catalyst, is provided.