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Novel method synthesizes 2-indolylbenzoxazinones in indole derivatives, indicating an efficient oxidation approach.
A novel and concise method for the oxidation of unprotected indole derivatives to synthesize 2-indolylbenzoxazinones in the presence of AIBN under open air has been successfully demonstrated. This metal-free reaction is both atom- and step-efficient and is applicable to a broad scope of substrates. This new methodology provides a facile pathway for oxidative C2-C3 bond cleavage and recyclization of 1H-indoles.
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Liu et al. (2017) studied this question.
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