Electrochemical Oxidative [4+2] Annulation for the π‐Extension of Unfunctionalized Heterobiaryl Compounds
作者:Xia Hu、Lei Nie、Guoting Zhang、Aiwen Lei
DOI:10.1002/anie.202003656
日期:2020.8.24
biological activities, regioselective access to fused aromatic compounds is significantly important in the field of organic materials and pharmaceutical science. Herein, we developed electrochemical oxidative [4+2] annulationreactions of heterobiaryl compounds with alkynes or alkenes, leading to the formation of several polycyclic heteroaromatic compounds. This electrosynthetic methodology serves for
Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent
作者:Zhanwei Ma、Min Zhou、Lin Ma、Min Zhang
DOI:10.1177/1747519820907244
日期:2020.7
acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare
Visible light enabled [4+2] annulation reactions for anthracenone-furans from 2,3-dibromonaphthoquinone and phenylbenzofurans
作者:Zhimei Mao、Aimin Huang、Lin Ma、Min Zhang
DOI:10.1039/d1ra07314a
日期:——
A facile visible light promoted [4 + 2] annulation reaction from readily available starting materials using an organo-photocatalyst gave anthracenone-furans with up to 95% yield in one-pot.