1: With 2,2'-azo-bisisobutyronitrile in tetrahydrofuran 24 h; Heating; 2: With dihydrogen peroxide in tetrahydrofuran; water T=0°C;

sodium hydroxide 1.) 200 deg C, 6 h, 2.) reflux, 3 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;