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Visible-Light-Driven Transition-Metal-Free Site-Selective Access to Isonicotinamides
Chunhua Ma1, Yu Tian1, Junyan Wang1
1Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China.
Abstract:
The greener synthesis of N-substituted isonicotinamides is of high importance and remains a significant challenge to the chemistry community. Herein we delineated a visible-light-driven, transition-metal-free, external-oxidant-free radical-radical cross-coupling reaction to access the N-substituted isonicotinamides via consecutive photoinduced electron transfer (ConPET). The utility of this protocol is highlighted through the N-terminal modification of peptides and late-stage modification of drugs.
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