3-chloro-benzenecarboperoxoic acid in N,N-dimethyl-formamide T=-50°C; 1 h;

iodine cloride; N,N-dimethyl-formamide 1.) 0 deg C, 10 min, 2.) RT, 2 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;