Rencent Advances in Asymmetric Michael Addition Catalyzed by Chiral Bifunctional Thioureas
Hou Xuehui, Ma Zhiwei, Wang Jianling, Liu Hongmin
Chin. J. Org. Chem. . 2014, (8): 1509 -1522 .  DOI: 10.6023/cjoc201402029