dihydrogen peroxide in acetic acid 1) RT, 2) reflux; m-chloroperbenzoic acid;

N,N,N',N',N'',N''-hexamethylphosphoric triamide; lithium diisopropyl amide 1.) THF, -78 deg C, 15 min, 2.) to room temp., 2.5 h; Yield given. Multistep reaction. Yields of byproduct given;