Chemical and Pharmaceutical Bulletin p. 1085 - 1087 (1991)
Update date:2022-07-31
Topics:
Yamamoto
Murata
Morimoto
Achiwa
Axially dissymmetric biphenylbisphosphine ligands, BIMOP (1a) and p-MeO-BIMOP (1b) have been newly designed and prepared. The ruthenium (II) complexes of (R)-1a and 1b proved to be excellent catalysts in asymmetric hydrogenations of methyl 3-oxobutanoate and tiglic acid affording (R)-methyl 3-hydroxybutanoate of 95-99 % ee and (R)-2-methylbutyric acid of 86-91 % ee, respectively.
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Doi:10.1016/S0040-4020(01)82570-9
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