Asymmetric Formal Synthesis of (-)-Swainsonine by a Highly Regioselective and Diastereoselective Allylic Amination Using Chlorosulfonyl Isocyanate
作者:Qing Ri Li、Guang Ri Dong、Sook Jin Park、Yong Rae Hong、In Su Kim、Young Hoon Jung
DOI:10.1002/ejoc.201300308
日期:2013.7
A concise asymmetric formal synthesis of (–)-swainsonine from readily available D-erythronolactone is described. The key steps include a highly diastereoselective amination of a chiral benzylic ether, which occurs with the retention of stereochemistry using chlorosulfonyl isocyanate, and a palladium-catalyzed decarboxylative N-allylation of an allyl carbamate.
描述了从现成的 D-赤藓酮内酯中 (-)-swainsonine 的简洁不对称形式合成。关键步骤包括手性苄醚的高度非对映选择性胺化,该胺化与使用氯磺酰基异氰酸酯保留立体化学一起发生,以及钯催化的氨基甲酸烯丙酯的脱羧 N-烯丙基化。