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Herein, we describe two types of C5 functionalization reactions of chromones with allyl alcohols. Diverse 5‐substituted chromones can be produced by modulating the catalysts in these reactions: Rh(III) results in the formation of 5‐alkylated chromones, and Ru(II) furnishes 5‐alkenylated products. We also achieve further functionalizations of these 5‐substituted chromones, which demonstrates the superiority...
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