Enantioselective hydrogenation of the C:N group: a catalytic asymmetric reductive amination procedure
作者:Mark J. Burk、John E. Feaster
DOI:10.1021/ja00041a067
日期:1992.7
substituents on phosphorus-linked aryl groups dramatically enhance the enantioselectivity. Such electronic effects of ligands on the enantioselectivity are rare, and as in the welldocumented case of Mn(II1)-mediated epoxidation reactions,' these may play an important role in the design of new catalysts. The highest enantioselectivities are obtained in nonpolar solvents (C6F6 = hexane > benzene > THF),