Syntheses of Benzofuranoquinolines and Analogues via Photoinduced Acceptorless Dehydrogenative Annulation of <i>o</i>-Phenylfuranylpyridines
作者:Jinming Fan、Wei Zhang、Wangxi Gao、Tao Wang、Wei-Liang Duan、Yong Liang、Zunting Zhang
DOI:10.1021/acs.orglett.9b03556
日期:2019.11.15
strategy for the syntheses of benzofuranoquinolines and its analogues via the irradiation of o-phenylfuranyl/thienylpyridines/pyrimidines in DCM with UV light at rt under an argon atmosphere is described. The mechanism of this reaction through the process of 6π-electrocyclization, [1,5]-hydrogen shift, and 1,3-eneamine tautomerism leading to H2 evolution was elucidated. Notably, the syntheses of cis-8b-methyl-8b
描述了通过在氩气气氛下在室温下用UV光在DCM中用邻苯呋喃基/噻吩基吡啶/嘧啶进行辐照来合成苯并呋喃喹啉及其类似物的策略。阐明了该反应通过6π-电环化,[1,5]-氢转移和1,3-烯胺互变异构导致H2析出的机理。值得注意的是,通过光诱导的2-(3-甲基苯并呋喃-2-基)-3-苯基吡啶的光致重排合成了顺式-8b-甲基-8b,13a-二氢苯并[f]苯并呋喃[3,2-h]喹诺酮这种反应的机制凸显了开发方法的重要性。