Chiral VAPOL Imidodiphosphoric Acid-Catalyzed Asymmetric Vinylogous Mannich Reaction for the Synthesis of Butenolides
作者:Suoqin Zhang、Guangliang Zhang、Tianyun Zhou、Jigang Gao、Guofeng Liu、Xukai Guan、Dong An
DOI:10.1055/s-0037-1610232
日期:2018.9
Chiral butenolides were synthesized by the enantioselective vinylogous Mannich reaction. Chiral (VAPOL)-type imidodiphosphoric acids are efficient catalysts for the asymmetric vinylogous Mannich (AVM) reaction of aldimines and trimethylsiloxyfuran in toluene. Under the optimized conditions, a series of butenolides were obtained with high yields (up to 98%) and enantioselectivities (up to 97% ee) as
手性丁烯内酯是通过对映选择性乙烯基曼尼希反应合成的。手性 (VAPOL) 型亚胺二磷酸是醛亚胺和三甲基甲硅烷氧基呋喃在甲苯中进行不对称乙烯基曼尼希 (AVM) 反应的有效催化剂。在优化的条件下,获得了一系列具有高产率(高达 98%)和对映选择性(高达 97% ee)以及优异的非对映选择性(高达 99:1 dr)的丁烯内酯。