A new and straightforward protocol for the synthesis of quinoline N‐oxides from the annulation of arylnitrones and alkynes is described. For the first time, a [4+2] cyclization of nitrone and alkynes has been achieved by cobalt catalysis via a nitrone‐assisted dual C–H cleavage under relatively mild conditions.
描述了一种从芳基硝酮和
炔烃的环合反应合成
喹啉N-氧化物的新的直接方法。首次,硝酮和
炔烃的[4 + 2]环化已经由
钴催化实现经由相对温和的条件下硝酮辅助双C-H裂解。