An efficient Cp*Rh(III)-catalyzed direct acylmethylation of 2H-indazoles with sulfoxonium ylides has been realized under air atmosphere via chelation-assisted strategy. This protocol enables a regioselective access to a variety of ortho-acylmethylated 2-phenylindazole derivatives in moderate to good yield, which has the advantages of broad substrate scope, good functional group tolerance, and operational convenience. The H/D exchange experiment reveals that a reversible cleavage of C–H bond might not be the rate-limiting step in this transformation.

中文翻译：

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Rh（III）催化2 H-吲唑与亚砜基鎓盐的C–H酰基甲基化

通过螯合辅助策略，在空气中实现了高效的Cp * Rh（III）催化2 H-吲唑与亚砜基鎓的直接酰基甲基化反应。该方案使得能够以中等至良好的收率选择性地选择各种邻-酰基甲基化的2-苯基吲唑衍生物，其优点是底物范围宽，官能团耐受性好和操作方便。H / D交换实验表明，C–H键的可逆裂解可能不是此转化过程中的限速步骤。