represents the quintessential scaffold of many natural products. While C-3 alkylation is easily achievable, effective greener strategies for C-4 alkylation have been less forthcoming. Herein, we report a metal-free photoinduced deaminative strategy for C-4 alkylation of coumarins using redox activated secondary and benzylic amine derived Katritzky pyridinium salts.
香豆素核心代表了许多天然产品的典型支架。虽然 C-3 烷基化很容易实现,但 C-4 烷基化的有效绿色策略却不太容易实现。在此,我们报告了一种使用氧化还原活化的仲胺和
苄胺衍生的 Katritzky
吡啶鎓盐对
香豆素进行 C-4 烷基化的无
金属光诱导脱
氨基策略。