1: Br2 / CCl4; acetonitrile / Ambient temperature 2: 2) potassium t-butoxide / 1) CCl4-CH3CN, room temperature, 2) THF, room temperature View Scheme

potassium tert-butylate 1) CCl4-CH3CN, room temperature, 2) THF, room temperature; Multistep reaction;

3-chloro-benzenecarboperoxoic acid in methanol; dichloromethane 1) -78 deg C, 2) 6h, room temperature;