potassium hydroxide; water in methanol 1 h;

1: 38.0 g / KOH, H2O / methanol / 1 h 2: 1.) methanesulphonyl chloride, 2.) sodium iodide / 1.) pyridine, 0.5 h, room temperature, 2.) acetone, 0.5 h, reflux View Scheme

1: 38.0 g / KOH, H2O / methanol / 1 h 2: PBr3 View Scheme