Herein, a novel and facile organic photosensitizer (thioxanthone)-mediated energy-transfer-enabled (EnT-enabled) dearomative [2+2] cycloaddition of aromatic heterocycles/maleimides for green synthesis of cyclobutane-fused polycyclic skeletons is reported. Mechanistic investigations revealed that different EnT pathways by triplet thioxanthone were initiated when different aromatic heterocycles participated
在此,报道了一种新颖且简便的有机光敏剂(
噻吨酮)介导的能量转移(EnT-enabled)芳香杂环/马来
酰亚胺的脱芳香[2+2]环加成反应,用于
环丁烷稠合多环骨架的绿色合成。机理研究表明,当不同的芳香杂环参与反应时,三重态
噻吨酮会引发不同的EnT途径,产生相应的激发中间体,然后进行分子间[2+2]环加成反应,得到所需的高功能化
环丁烷稠合多环骨架。