1: 66 percent / 1.) N-chlorosuccinimide, dimethyl sulfide, 2.) triethylamine / toluene / 1.) -25 deg C, 2 h, 2.) -25 deg C, 5 min 2: 75 percent / 2 percent ethanolic sodium hydroxide / ethanol / 2 h / Ambient temperature 3: 80 percent / potassium carbonate / ethanol; H2O / 8 h / Ambient temperature View Scheme