1: 97 percent / thionyl chloride / toluene / 4 h / Heating 2: 1.) TiCl4 / 1.) chloroform, 0 deg C, 60 min, 2.) chloroform, overnight View Scheme

1: 97 percent / diethyl ether / 2 h / Ambient temperature 2: 97 percent / thionyl chloride / toluene / 4 h / Heating 3: 1.) TiCl4 / 1.) chloroform, 0 deg C, 60 min, 2.) chloroform, overnight View Scheme

titanium tetrachloride 1.) chloroform, 0 deg C, 60 min, 2.) chloroform, overnight; Yield given. Multistep reaction;