Metal-Free Oxidative Functionalization of Allylic Sulfones/Allylic Triflones with Water Participation Enabled by Hypervalent Iodine Reagents.

A metal-free, efficient, iodine(III)-promoted oxidative transformation of allylic sulfones/allylic triflones with water participation for accessing sulfonyl ketones and triflyl allylic alcohols is reported. This strategy enables the selective construction of two SO2-containing compounds with chemical and biological significance, and its success mainly relies on the substitution effect of the starting materials. Water serves as an eco-friendly oxygen atom source. This transformation has excellent selectivity, broad substrate scope, mild reaction conditions, and ease of scale-up.