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A novel and efficient procedure was developed for direct preparation of aryl‐substituted lactones from corresponding aryl‐substituted alkanoic acids, catalyzed by the in situ generated hypervalent iodine intermediate from iodobenzene (PhI). In this protocol, aryl‐substituted alkanoic acids were treated with m‐chloroperbenzoic acid (mCPBA) and KBr in the presence of a catalytic amount of PhI in 2,2,2‐trifluoroethanol...
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