A mild visible light-induced palladium-catalyzed alkyl Heck reaction of diazo compounds and N-tosylhydrazones is reported. A broad range of vinyl arenes and heteroarenes with high functional group tolerance, as well as a range of different diazo compounds, can efficiently undergo this transformation. This method features Brønsted acidassisted generation of hybrid palladium C(sp 3 )-centered radical intermediate, which allowed for new selective C À H functionalization protocol.Scheme 1. The reactivity of diazo compounds with alkenes.

A mild visible light-induced palladium-catalyzed alkyl Heck reaction of diazo compounds and N-tosylhydrazones is reported. A broad range of vinyl arenes and heteroarenes with high functional group tolerance, as well as a range of different diazo compounds, can efficiently undergo this transformation. This method features Brønsted acidassisted generation of hybrid palladium C(sp 3 )-centered radical intermediate, which allowed for new selective C À H functionalization protocol.Scheme 1. The reactivity of diazo compounds with alkenes.

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