Abstract
AbstractHerein, we report a copper‐catalyzed intramolecular benzylic C(sp3)−H oxidation of unprotected aniline derivatives under aerobic conditions, which enables the preparation of phenanthridine compounds. To the best of our knowledge, this is the pioneering reaction of dehydrogenative C(sp3)−N bond formation from unprotected anilines under a Cu/O2 system. Notably, various anilines possessing alkyl, methoxy, halogen (fluoride, chloride, bromide, and iodide), trifluoromethyl, trifluoromethoxy, cyano, ester, and acetal groups can also participate in the reaction.
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