作者:Li, Min、Tan, Qiujian、Lyu, Xiang、Guo, Xiaoyu、Wang, Hui、Hu, Zhongyan、Xu, Xianxiu
DOI:10.1021/acs.orglett.4c01977
日期:——
photoinduced radical cascade cyclization of alkynes with sulfinates via a novel EDA complex for the synthesis of various 3-sulfonylindoles and vinyl sulfone oxindoles, which are crucial motifs in medicinal and biological chemistry. The reaction proceeds under mild, photocatalyst- and transition-metal-free conditions, featuring operational simplicity, broad substrate scope, and easy scalability. Mechanistic
在此,我们公开了通过新型EDA复合物对炔烃与亚磺酸盐进行光诱导自由基级联环化,用于合成各种3-磺酰吲哚和乙烯基砜羟吲哚,这些是药物和生物化学中的关键基序。该反应在温和、无光催化剂和过渡金属的条件下进行,具有操作简单、底物范围广、易于扩展的特点。机理研究表明,该反应是通过光诱导的从亚磺酸盐到N-磺酰胺的分子间电荷转移引发的,产生磺酰基自由基,然后产生N-中心自由基,从而实现级联环化过程。