with promising biological activities, but have daunting synthetic challenges. Herein, we presented a regio‐ and stereoselective [4+2] annulation of isoindigo derivatives with allenes by bifunctional phosphonium catalysis. This protocol provides a complementary way for accessing complex heterocyclic compounds.
包含4 H-
吡喃核心的结构稠合杂环是具有前途
生物学活性的普遍支架,但在合成方面却面临艰巨挑战。在这里,我们介绍了通过双功能presented催化的
异靛蓝衍
生物与烯丙基的区域和立体选择性[4 + 2]环化反应。该协议为访问复杂的
杂环化合物提供了一种补充方法。