sodium carbonate; 3-chloro-benzenecarboperoxoic acid in chloroform 1.) -15 deg C, 1.5 h, 2.) -15 deg C to 0 deg C, 3 h;

1: 92 percent / molecular sieves (Serva 4a) / 24 h / Ambient temperature 2: 60 percent / m-chloroperoxybenzoic acid, Na2CO3 / CHCl3 / 1.) -15 deg C, 1.5 h, 2.) -15 deg C to 0 deg C, 3 h View Scheme