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Abstract With 2‐hydroxyphenyl‐functionalized enaminones and thiophenols as the starting materials, the facile synthesis of 3‐sulfenylated chromones has been realized through a KIO 3 ‐catalyzed domino reaction of C−H sulfenylation and subsequent C−N‐cleavage‐based C−O bond formation. The reaction was performed under transition‐metal‐free conditions in ethyl lactate, a bioavailable ecofriendly medium.
Zhong et al. (Mon,) studied this question.