Photoinduced tandem radical cyclization/heteroarylation of <i>N</i>-allylbromodifluoroacetamides with quinoxalin-2(1<i>H</i>)-ones or coumarins under metal- and photocatalyst-free conditions
作者:Wei Zhao、Liangming Xuan、Yang Liu、Jiayi Yin、Haifeng Wang、Qiongjiao Yan、Wei Wang、Jin Huang、Fener Chen
DOI:10.1039/d3nj01329d
日期:——
intramolecular 5-exo-trig cyclization/heteroarylation between N-allyl-2-bromo-2,2-difluoroacetamides and quinoxalin-2(1H)-ones or coumarins has been developed without an external photocatalyst. By applying this new approach, a broad range of valuable α,α-difluoro-γ-lactam-fused quinoxalin-2(1H)-ones and coumarins (49 examples) can be facilely obtained at room temperature, thus showing the wide utility
N -allyl-2-bromo-2,2-difluoroacetamides 和 quinoxalin-2(1 H )-ones 或香豆素之间的可见光促进的串联自由基 5- exo -trig 环化/杂芳基化已在没有外部光催化剂的情况下开发. 通过应用这种新方法,可以在室温下轻松获得各种有价值的 α,α-二氟-γ-内酰胺-稠合喹喔啉-2(1 H )-酮和香豆素(49 个实例),从而显示出广泛的实用性该协议的。此外,机械实验揭示了电子供体-受体 (EDA) 复合体参与了这种转化。