n-butyllithium; N,N,N',N,-tetramethylethylenediamine; dihydrogen peroxide; acetic acid 1.) Et2O, hexane, r.t., 2 h, 2.) r.t. to 70 deg C, 0.5 h; Yield given. Multistep reaction;

in tetrahydrofuran; benzene 18 h; Heating;