KUAN-MIAO LIU2026-10-162026-10-162025-01-07Pure ID: 14932177Pure UUID: 0fc1ee9c-8d8d-4ff6-8bea-cab7ded6511510.1002/adsc.202400756https://www.scopus.com/pages/publications/85206876470https://scholars.csmu.edu.tw/handle/123456789/23167A Rh(III)-catalyzed redox-neutral C−H activation/[3+3] cyclization of 2-benzyl-2H-indazole-6-carboxylic acids with iodonium ylides under microwave irradiation for the synthesis of indazole-fused chromenes has been reported. The critical feature of this method is that the C−H activation of the C7−H bond of 2-benzyl-2H-indazole-6-carboxylic acid proceeds regioselectively in the presence of the proximate C5−H bond without the need of external oxidant. Microwave irradiation reduced the reaction time as compared to conventional heating. The detailed mechanistic study disclosed the mechanistic pathway of the reaction.enjournal article