An intramolecular C(sp(3))-O bond formation has been achieved via PhI(OAc)2/NaN3-mediated oxygenation of N,N-diaryl tertiary amines. The appealing features of this method include mild reaction conditions, absence of heavy-metal catalysts, and the direct intramolecular functionalization of sp(3) C-H bonds adjacent to nitrogen.
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Zhang et al. (2014) studied this question.
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