1: 1.) SOCl2 / 1.) CHCl3, 45 deg C, 4 h, 2.) 1,2-dichloroethane, reflux, 5 h 2: 89 percent / lithium bis(trimethylsilyl)amide / tetrahydrofuran; hexane / 0.25 h / 0 °C 3: 80 percent / aq. HCl / methanol / 3.5 h / 60 - 80 °C View Scheme