Copper-Catalyzed Direct Oxidative C-H Amination of Benzoxazoles with Formamides or Secondary Amines under Mild Conditions

[摘要]：A facile, efficient, and practical method for copper-catalyzed direct C-H amination of benzoxazoles with formamides or secondary amines has been developed. The system can be performed in the absence of external base and only requires O-2 or even air as oxidant. A variety of substituted benzoxazol-2-amines were synthesized with moderate to excellent yield.

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