Iridium-Catalyzed Asymmetric Hydrogenation of Unfunctionalized Enamines
作者:Alejandro Baeza、Andreas Pfaltz
DOI:10.1002/chem.200802576
日期:2009.2.23
Optically active tertiary amines are readily prepared by iridium‐catalyzed asymmetrichydrogenation of unfunctionalizedenamines (see scheme). The best enantioselectivities with >90 % ee were obtained with N‐aryl‐ and N‐benzyl‐substituted enamines with a terminal double bond. The hydrogenation of enamines derived from cyclic ketones, which has not been reported yet with other catalysts, gave enantiomeric