S-functionalized internal olefins, that is, α-oxo ketene dithioacetals, was efficiently achieved with alcohols as the alkoxylating agents, (diacetoxyiodo)benzene (PhI(OAc)2) as the oxidant, and benzoquinone (BQ) as the co-oxidant. The alkoxylated olefins were thus constructed and applied for the synthesis of alkoxylated N-heterocycles. Polarization of the olefinic carbon-carbon doublebond by the electron-donating
CuCl2 and CuBr2-mediated intramolecular oxidative C–H/N–H cross-coupling/halogenation of β-thioalkyl-α-alkenoyl ketene N,S-acetals provides a new concise synthetic route to pyrrolones.