Cascade Claisen and Meinwald Rearrangement for One-Pot Divergent Synthesis of Benzofurans and 2<i>H</i>-Chromenes
作者:Liyan Song、Qian Su、Xi Lin、Zhihui Du、Huiyou Xu、Ming-An Ouyang、Hongliang Yao、Rongbiao Tong
DOI:10.1021/acs.orglett.0c00770
日期:2020.4.17
A new cascade approach has been developed for the one-pot four-step divergent synthesis of polysubstituted benzofurans and 2H-chromenes, featuring a novel cascade aromatic Claisen rearrangement/Meinwald rearrangement/dehydrative or oxidative cyclization. This new method was demonstrated with 39 examples tolerating different substitutions at an epoxide, allylic ether, and aromatic ring, and we showcased
已开发出一种新的级联方法,用于一锅四步发散合成多取代的苯并呋喃和2 H-色烯,其特征在于新颖的级联芳烃克莱森重排/梅恩瓦尔德重排/脱水或氧化环化。通过39个在环氧化物,烯丙基醚和芳环上具有不同取代的实例证明了这种新方法,并且我们在七个步骤中首次完全合成天然产物柠檬酸A展示了其实用性。