An efficient asymmetric synthesis of 3S, 4S-3-acylamino-4-hydroxymethylazetidin-2-ones
作者:Richard C. Thomas
DOI:10.1016/s0040-4039(01)93751-7
日期:1989.1
An efficient method for the synthesis of azetidinones 1 and 2 from readily available precursors is presented. [2 + 2]-Cycloaddition gives enantiomerically pure azetidinone 5 in 46% isolated yield after a single crystallization. Olefin cleavage and N-1-deprotection afford the desired products in high yield via crystalline intermediates.
提出了一种从容易获得的前体合成氮杂环丁酮1和2的有效方法。单结晶后,[2 + 2]-环加成反应以对映体纯净的形式,以46%的分离产率得到氮杂环丁酮5。烯烃裂解和N-1-脱保护通过结晶中间体以高收率提供所需产物。