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The tandem oxidation of the enaminone C=C double bond as well as subsequent C‐N bond formation are realized under metal‐free conditions by thermo‐induced free radical transformation. In the presence of benzoyl peroxide (BPO) and N‐iodosuccinimide (NIS), a series of tertiary α‐ketoamides are synthesized practically under aerobic atmosphere. The 18O isotopic experiment confirms that air is the source of oxygen in the newly generated carbonyl group.
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Yang et al. (2019) studied this question.
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