Metal-free hydroacyloxylation and hydration reactions of ynamides: synthesis of α-acyloxyenamides and N-acylsulfonamides

Two types of highly efficient and operationally simple reactions of ynamides under metal-free conditions are developed, including hydroacyloxylation and hydration, which afforded highly functionalized α-acyloxyenamides and pharmaceutically important N -acylsulfonamides in good to excellent yields.