Copper‐Catalyzed Direct Arylation of Indoles and Related (Hetero)arenes: A Ligandless and Solvent‐free Approach
作者:Dilip K. Pandey、Anand B. Shabade、Benudhar Punji
DOI:10.1002/adsc.202000312
日期:2020.6.15
A ligandless and solvent‐free copper‐catalyzed method for the regioselective C−H bond arylation of indoles and related heteroarenes is reported. The use of CuCl efficiently catalyzes the direct coupling of diverse heteroarenes with aryl iodides via chelation‐assistance. This reaction could tolerate sensitive and structurally diverse functionalities, including halides, ethers, thioethers, amines, indolyl
据报道,用于吲哚和相关杂芳基的区域选择性CH键芳基化的无配体和无溶剂铜催化方法。CuCl的使用通过螯合辅助有效地催化了各种杂芳烃与芳基碘的直接偶联。该反应可以耐受敏感的和结构上多样化的官能团,包括卤化物,醚,硫醚,胺,吲哚基,吡咯基和咔唑基。指导基团2-吡啶基可被平滑除去,生成C-2芳基化的游离NH吲哚,该芳基化的吲哚可进一步官能化为色胺。初步的机理研究揭示了芳基化反应的根本途径。