| 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 >an R<2f >are the same or different and each is a hydrogen atom and the like, and R<3>, R<4>, R<5>, R<6>, R<7>, R<8>, R<9 >and R<10 >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.
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