1: thionyl chloride / toluene / 1.) 30 deg C, 45 min, 2.) reflux, 3 h 2: 1.) SnCl4, 2.) 6M HCl / 1.) CH2Cl2, RT, 2 h, 2.) RT, 16 h View Scheme

hydrogenchloride; tin(IV) chloride 1.) CH2Cl2, RT, 2 h, 2.) RT, 16 h; Yield given. Multistep reaction;