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Studies on the rhodium- and ruthenium-catalyzed asymmetric hydrogenation of α-dehydroamino acids using a family of chiral dipyridylphosphine ligand (P-Phos)

✍ Scribed by Jing Wu; Cheng Chao Pai; Wai Him Kwok; Rong Wei Guo; Terry T.L. Au-Yeung; Chi Hung Yeung; Albert S.C. Chan

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 180 KB
Volume: 14
Category: Article
ISSN: 0957-4166
DOI: 10.1016/s0957-4166(03)00098-3

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✦ Synopsis

The applications of the chiral dipyridylphosphine ligand P-Phos and its derivatives Tol-P-Phos and Xyl-P-Phos in Ruand Rh-catalyzed hydrogenations of the methyl esters of a variety of (Z)-2-acetamido-3-arylacrylic acids have been studied systematically. The results show that the electronic and steric properties of these ligands have significant influences on the enantioselectivity of the reduction. Rh and Ru complexes of the same dipyridylphosphine ligand family exhibit different trends in enantioselectivity toward the same substrate.

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