Expedited Total Synthesis of (±)-Brevianamide A via the Strategic Use of Gold(I) Catalysis
作者:Ali Mansour、Fabien Gagosz
DOI:10.1021/acs.orglett.2c02971
日期:2022.10.7
Two concise and complementary routes to the polycyclic alkaloid (±)-brevianamide A from readily available amino acid building blocks are presented. Key to the synthesis is the strategic use of a gold(I)-catalyzed cascade process that quickly assembles the characteristic pseudoindoxyl motif of the natural product along with the two adjacent quaternary centers in a single step. This sequence, which exemplifies
介绍了从容易获得的氨基酸结构单元获得多环生物碱 (±)-brevianamide A 的两条简明互补的途径。合成的关键是战略性地使用金 (I) 催化的级联过程,该过程在一个步骤中快速组装天然产物的特征性假吲哚基基序以及两个相邻的季铵中心。该序列体现了金催化可以实现的结构复杂性,允许以最短时间和最高产率合成 (±)-brevianamide A (四步 LLS,总产率 14%)。