Chemical and Pharmaceutical Bulletin p. 481 - 488 (1994)
Update date:2022-08-05
Topics:
Morimoto
Takahashi
Achiwa
Chiral pyrrolidinebisphosphine ligands, (2S-cis)-BCPM and (2S-cis)-BCPP, bearing two different types of phosphino groups, a dicyclohexylphosphino group and a diphenylphosphino group, were designed and prepared on the basis of our design concept for developing highly efficient ligands. The validity of the concept was confirmed experimentally in the asymmetric hydrogenation of ketopantolactone using neutral rhodium(I) complexes of BCPM. BCPP, BPPM, and BCCP. The rhodium(I) complex of (2S-cis)-BCPM was found to be the most effective catalyst (substrate/catalyst >ca. 104, >90% ee (R)).
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