Pentanidium-Catalyzed Enantioselective Phase-Transfer Conjugate Addition Reactions
作者:Ting Ma、Xiao Fu、Choon Wee Kee、Lili Zong、Yuanhang Pan、Kuo-Wei Huang、Choon-Hong Tan
DOI:10.1021/ja1098353
日期:2011.3.9
A new chiral entity, pentanidium, has been shown to be an excellent chiral phase-transfer catalyst. The enantioselective Michael addition reactions of tert-butyl glycinate-benzophenone Schiff base with various α,β-unsaturated acceptors provide adducts with high enantioselectivities. A successful gram-scale experiment at a low catalyst loading of 0.05 mol % indicates the potential for practical applications
一种新的手性实体戊烷已被证明是一种出色的手性相转移催化剂。甘氨酸叔丁酯-二苯甲酮席夫碱与各种α,β-不饱和受体的对映选择性迈克尔加成反应提供了具有高对映选择性的加合物。在 0.05 mol% 的低催化剂负载下成功的克级实验表明该方法具有实际应用的潜力。磷酸甘氨酸酯类似物也可用作迈克尔供体,提供富含对映体的 α-氨基膦酸衍生物和 (S)-脯氨酸的膦酸类似物。