Synthesis of novel carbohydrate-based chiral P, N ligands and their applications in Cu-catalyzed enantioselective 1, 4-conjugate additions
作者:Haijun Xia、Hua Yan、Chao Shen、Fangyi Shen、Pengfei Zhang
DOI:10.1016/j.catcom.2011.09.021
日期:2011.11
A new type of phosphate-pyridine (P, N) ligand derived from D-glucosamine and BINOL was synthesized and successfully applied in Cu-catalyzed enantioselective conjugate addition of diethylzinc to chalcones for the first time, high yields and enantioselectivities were obtained when the ligand 10a which contains (S)-BINOL was used. The results also showed that the configuration of BINOL at the ligand backbone had remarkable effects on the activities and enantioselectivities. (C) 2011 Elsevier B.V. All rights reserved.