Highly Efficient Synthesis of Multisubstituted 2‐Acyl Furans via PIFA/I2‐Mediated Oxidative Cycloisomerization of cis‐2‐En‐4‐yn‐1‐ols.

Combination of a hypervalent iodine(III) reagent, molecular iodine, and a base gives rise to an oxidative cycloisomerization of cis-enynols, enabling the synthesis of 2-acyl furans with diverse substitution patterns in a regioselective manner under mild conditions.