1: 82 percent / thionyl chloride / toluene / 1.) room temp., 1 h; 2.) reflux, 1.5 h 2: K2CO3 / butan-2-one / 16 h / Heating View Scheme

With  thionyl chloride in  toluene  1.) room temp., 1 h; 2.) reflux, 1.5 h;