Cascade Claisen Rearrangement: Rapid Synthesis of Polysubstituted Salicylaldehydes and Total Syntheses of Hemigossypol and Gossypol
作者:Tongxiang Cao、Yi Kong、Kui Luo、Lianfen Chen、Shifa Zhu
DOI:10.1002/anie.201801612
日期:2018.7.9
A cascade Claisen rearrangement of a well‐organized maltol propargyl ether for the construction of polysubstituted salicylaldehydes is reported. This reaction features high atom economy (100 %), as well as catalyst‐free and gram‐scale conditions. Based on this novel methodology, the total synthesis of hemigossypol, gossypol, and their analogues has been realized.
据报道,一种结构良好的麦芽酚炔丙基醚的级联克莱森重排用于构建多取代的水杨醛。该反应具有很高的原子经济性(100%),以及无催化剂和克级条件。基于这种新颖的方法,已经实现了半棉酚,棉酚及其类似物的全合成。