Access to Chromenopyrrolidines Enabled by Organophotocatalyzed [2 + 2 + 1] Annulation of Chromones with <i>N</i>-Arylglycines
作者:Xin Zhou、Biwei Zhang、Ping Wu、Wei Xu、Renqi Wang、Jingbai Li、Hongbin Zhai、Bin Cheng、Taimin Wang
DOI:10.1021/acs.orglett.3c02801
日期:2023.10.20
conditions via organophotocatalyzed aerobic decarboxylative [2 + 2 + 1] annulation of chromones with N-arylglycines, in which N-arylglycines perform dual roles (i.e., radical precursor and methylene provider). Mechanistic studies suggested that a Giese-type radical addition and consequent Mannich pathway were likely responsible for the annulation reaction.
在温和条件下,通过有机光催化色酮与N-芳基甘氨酸的需氧脱羧 [2 + 2 + 1] 环化,实现了色并吡咯烷的简便方法,其中N -芳基甘氨酸发挥双重作用(即自由基前体和亚甲基提供者)。机理研究表明吉斯型自由基加成和随后的曼尼希途径可能是环化反应的原因。