Asymmetric Synthesis of Ethoxydienamines in Superbasic Medium Mediated by Chiral Sulfinyl Group
作者:Marco Blangetti、Gianluca Croce、Annamaria Deagostino、Eleonora Mussano、Cristina Prandi、Paolo Venturello
DOI:10.1021/jo1024943
日期:2011.3.18
SN-sulfinyl imines) afforded N-sulfinyl alkoxydienyl amines 4 with high diastereoselectivity. Functionalized enantiopure alkoxydienyl amines 5 were then easily obtained upon the selective removal of the chiral auxiliary under mild conditions. Moreover, the further hydrolysis of the alkoxydienyl moiety gave access to protected enantiopure β-keto amines 7.
直接加入的金属化alkoxydiene 2,从α,β不饱和醛缩醇得到1通过LIC-KOR-促进缀合的消除反应,以对映体纯sulfinimines 3(两者ř和小号ñ -亚磺酰基亚胺)得到ñ -亚磺酰基alkoxydienyl胺4与高非对映选择性。然后在温和条件下选择性除去手性助剂后,容易获得官能化对映体纯的烷氧基二烯基胺5。此外,烷氧基二烯基部分的进一步水解获得了受保护的对映纯β-酮胺7。