Photocatalyzed Reverse Polarity Oxidative Povarov Reaction of Glycine Derivatives with Maleimides
作者:Yongxin Zhang、Wei Jiang、Xiazhen Bao、Yifeng Qiu、Yong Yuan、Caixia Yang、Congde Huo
DOI:10.1002/cjoc.202100401
日期:2021.12
An oxidative tandem (4+2)-cyclization/aromatization of N-aryl glycine derivatives with electron-deficient alkenes was first achieved using Ru(bpy)3Cl2 as a photocatalyst and TBHP as an oxidant in combination with visible-light irradiation by blue LEDs. One-electron oxidation and the following α-deprotonation of glycine derivatives afford α-amino alkyl radicals, which were then trapped by electrophilic
使用 Ru(bpy) 3 Cl 2作为光催化剂和 TBHP 作为氧化剂,结合可见光照射,首次实现了N-芳基甘氨酸衍生物与缺电子烯烃的氧化串联 (4+2)-环化/芳构化蓝色 LED。单电子氧化和随后的甘氨酸衍生物的 α-去质子化得到 α-氨基烷基自由基,然后被亲电马来酰亚胺捕获。作为一种原子经济高效的方法,在温和的反应条件下,以良好的收率获得了多种吡咯并[3,4- c ]喹啉-1,3-二酮。