C-3 functionalization of 2H-indazoles was developed under aerobic conditions using carboxylic acid and DMSO as the combined source of the carboxylic acid ester group and DMSO as the formylating agent. A series of formylated indazoles and carboxylic acid esters of indazole derivatives were produced in moderate to excellent yields. The mechanistic studies suggest that the reactions probably proceed through
在有氧条件下,使用
羧酸和
DMSO 作为
羧酸酯基团的组合来源和
DMSO 作为甲酰化剂,开发了一种简便、高效且无过渡
金属的
化学发散 C-3 官能化 2 H-
吲唑。以中等至极好的收率生产了一系列甲酰化
吲唑和
吲唑衍
生物的
羧酸酯。机理研究表明,这些反应可能是通过自由基途径进行的。