1: SOCl2 / CH2Cl2 / 5 h / Heating 2: benzene; methanol / Ambient temperature 3: 1.) n-BuLi / 1.) THF, hexane, 35 deg C, 4 h, 2.) THF, hexane, -20 deg C, 3 h View Scheme

1: benzene; methanol / Ambient temperature 2: 1.) n-BuLi / 1.) THF, hexane, 35 deg C, 4 h, 2.) THF, hexane, -20 deg C, 3 h View Scheme

n-butyllithium 1.) THF, hexane, 35 deg C, 4 h, 2.) THF, hexane, -20 deg C, 3 h; Yield given. Multistep reaction;