1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione; 1,8-diazabicyclo[5.4.0]undec-7-ene 1) ethyl acetate, room temp., 30 min, 2) 20 - 25 deg C (ice-water bath), 90 min; Yield given. Multistep reaction;

N-chloro-succinimide; sodium hexamethyldisilazane 1) THF, 0 deg C, 15 min, 2) THF, r.t., 2 h; Yield given. Multistep reaction. Yields of byproduct given;

N-chloro-succinimide; sodium hexamethyldisilazane 1) THF, -78 deg C, 1.5 h, 2) THF, a) -78 deg C, 2 h, b) warming to 0 deg C; Yield given. Multistep reaction. Yields of byproduct given;

potassium carbonate; 3-chloro-benzenecarboperoxoic acid in dichloromethane 18 h;