Base-catalyzed O-vinylation of tertiary propargylic alcohols with acetylene: First examples

1-Ethynylcyclohexanol and 1-ethynylcycloheptanol are O-vinylated with acetylene in KOH/DMSO superbase system (90°C, autoclave, initial acetylene pressure of 14 atm, 1h) to afford the corresponding vinyl ethers in 40 and 34% yields, respectively.