Abstract
The dual reactivity of amides fused to 2-(5-phenylisoxazol-3-yl)aniline as a directing group for the formation of urea derivatives via chemospecific cleavage of the C(═O)─C bond and C(sp2)-H amination is reported here. Employing inexpensive copper as the catalyst and O2 in air as the oxidant, this protocol exhibited broad functional group tolerance for both the transformations. Detailed mechanistic studies and DFT calculations were performed to gain insights into a plausible mechanism for the formation of urea derivatives.
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