| abstract |
A production method of a compound represented by the formula n nwherein 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 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 formulan n nwherein X is a leaving group and other symbols are as defined above, or a salt thereof, with a phosphine-borane complex represented by the formulan n nwherein 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. |