Stereochemistry and mechanism of the asymmetric hydrogenation of unsaturated carboxylic acids catalyzed by binap—-ruthenium(II) dicarboxylate complexes
作者:Tetsuo Ohta、Hidemasa Takaya、Ryoji Noyori
DOI:10.1016/s0040-4039(00)97276-9
日期:1990.1
The stereochemical course and pattern of deuterium incorporation of the hydrogenation of unsaturatedcarboxylicacids catalyzed by Ru(OCOCH3)2(binap) indicate operation of a mechanism involving metal monohydride complexes.
Asymmetric hydrogenation of α,β-unsaturated carboxylic acids in supercritical carbon dioxide
作者:Jianliang Xiao、Sylvia C.A. Nefkens、Philip G. Jessop、Takao Ikariya、Ryoji Noyori
DOI:10.1016/0040-4039(96)00436-4
日期:1996.4
Hydrogenation of tiglic acid in supercritical CO2 catalyzed by a chiral H8-BINAP-Ru(II) complex proceeds cleanly with cis stereochemistry to afford 2-methylbutanoic acid in up to 89% ee and over 99% yield.