Copper (II) and indium (III) triflate catalyzes the Rupe rearrangement of propargylic alcohols in liquid sulfur dioxide as the reaction medium. 1-Ethynylcyclohexanol and 1-(phenylethynyl) cyclohexan-1-ol were used as the model substrates and the expected 1-(cyclohex-1-en-1-yl) ethanone and 1-(cyclohex-1-en-1-yl)-2-phenylethanone were obtained in average yields.