Highly Regioselective Synthesis of 2,3,4-Trisubstituted 1<i>H</i>-Pyrroles: A Formal Total Synthesis of Lukianol A<sup>,</sup><sup>1</sup>
作者:Jian-Hui Liu、Qing-Chuan Yang、Thomas C. W. Mak、Henry N. C. Wong
DOI:10.1021/jo9915224
日期:2000.6.1
led to several 2-substituted 3, 4-bis(trimethylsilyl)-1H-pyrrole-1-sulfonamides. Utilizing the beta-effect of a trimethylsilyl group, a highly regioselective synthesis of 2,3,4-trisubstituted 1H-pyrroles 23 and 34 was accomplished. The marine natural product lukianol A (3) was prepared utilizing this strategy.
N,N-二甲基3,4-双(三甲基甲硅烷基)-1H-吡咯-1-磺酰胺8c的alpha锂化和亲核取代的组合使用可导致多个2取代的3,4-双(三甲基甲硅烷基)-1H-吡咯-1-磺酰胺。利用三甲基甲硅烷基的β效应,完成了2,3,4-三取代的1H-吡咯23和34的高区域选择性合成。利用该策略制备了海洋天然产物卢卡醇A(3)。