A simple, efficient, and environmentally benign method for the direct C-3-alkoxycarbonylation of 2H-indazoles using alkyl carbazates has been developed under metal-free conditions at room temperature. This current protocol represents a facile access to C-3-carboxylic ester derived 2H-indazoles with wide functional group tolerance in good to excellent yields. The mechanistic studies suggest that the
开发了一种简单、有效且环境友好的方法,用于在室温、无
金属条件下使用
肼基
甲酸烷基酯直接对 2 H-
吲唑进行 C-3-烷氧基羰基化。目前的方案代表了以良好至优异的产率轻松获得具有广泛官能团耐受性的 C-3-
羧酸酯衍生的 2 H-
吲唑。机理研究表明该反应通过自由基途径进行。