Significant improvement in enantioselectivity and catalyst activity was achieved for the catalytic enantio selective Strecker reaction. Using a catalyst (1-2.5 mol%) prepared from Gd((OPr)-Pr-i)(3) and D-glucose derived ligand 1, and in the presence of 2,6-dimethylphenol as an additive, high enantioselectivity was obtained from a wide range of ketoimines, including heteroaromatic and cyclic ketoimines. The new method was applied to an efficient catalytic asymmetric synthesis of sorbinil, a therapeutic agent for diabetic complications. (C) 2004 Elsevier Ltd. All rights reserved.
HUNCHINS R. O.; ABDEL-MAGID AHMED; STERCHO Y. P.; WAMBSGANS A., J. ORG. CHEM., 52,(1987) N 4, 702-704
作者:HUNCHINS R. O.、 ABDEL-MAGID AHMED、 STERCHO Y. P.、 WAMBSGANS A.