An unexpected aziridination/rearrangement/oxidation tandem reaction leading to the total synthesis of (−)-mersicarpine
作者:Yun Zhang、Yibin Xue、Tuoping Luo
DOI:10.1016/j.tet.2016.11.049
日期:2017.7
indole, followed by rearrangement to furnish the featured tetracyclic framework. During the reaction condition screening, we accidentally encountered a tandem [3+2] cycloaddition/rearrangement/oxidation reaction, which enabled the synthesis of another alkaloid, (−)-mersicarpine, in four steps with 35% overall yield from a reported intermediate. The tandem [3+2] cycloaddition/rearrangement reaction disclosed
为了合成抗有丝分裂的天然产物(-)-鼠李,我们提出了一种基于叠氮化物与吲哚之间脱芳香分子内[3 + 2]环加成的策略,然后进行重排以提供特征性的四环骨架。在反应条件筛选过程中,我们意外地遇到了串联[3 + 2]环加成/重排/氧化反应,该反应可在四个步骤中合成另一种生物碱(-)-美卡西平,从报道的中间体中可得到35%的总收率。本文公开的串联[3 + 2]环加成/重排反应可以提供用于合成其他结构有趣的生物碱的方法。