1: 95 percent / N-iodosuccinimide / CHCl3 / 8 h / Ambient temperature 2: 95 percent / 2N HCl / methanol / 24 h / Ambient temperature 3: 88 percent / tri-n-butyltin hydride, azobis(isobutyronitrile) / benzene; methanol / 5 h / Heating View Scheme