Copper-Mediated and Palladium-Catalyzed Cross-Coupling of Indoles and <i>N</i>-Methylpyridinium Salts: A Practical Way to Prepare 3-(Pyridin-2-yl)indoles
作者:Juan Tang、Shun Li、Jing Zhang、Mei-xin Yan、Yong-lin Shi、Xue-li Zheng、Mao-lin Yuan、Hai-yan Fu、Rui-xiang Li、Hua Chen
DOI:10.1021/acs.orglett.3c01624
日期:2023.7.21
the corresponding 3-(pyridin-2-yl)indoles in moderate to good yields, wherein related electron-rich heterocycles (e.g., indole, 1-methylpyrrole, benzofuran, benzo[b]thiophene) are also applicable. Streamlined operation, good functional group tolerance, and late-stage modifications make this twofold C–H activation protocol an attractive route for the synthesis of 3-(pyridin-2-yl)indole derivatives.
在此,描述了通过无痕保护基策略的 Pd/Cu 双金属催化吡啶的直接 C-H 杂芳基化。一系列N-甲基活化的吡啶和1-甲基吲哚以高区域选择性偶联,以中等至良好的收率生成相应的3-(吡啶-2-基)吲哚,其中相关的富电子杂环(例如吲哚、1 -甲基吡咯、苯并呋喃、苯并[ b ]噻吩)也是适用的。简化的操作、良好的官能团耐受性和后期修饰使这种双重 C-H 激活方案成为合成 3-(吡啶-2-基)吲哚衍生物的有吸引力的途径。