1: Et3N / pyridine; H2O / electrolytic oxidation 2: 31.3 percent / BuLi, diisopropylamine, HMPA / tetrahydrofuran / 1.) -78 deg C, 30 min, 2.) -40 deg C, 90 min 3: 30percent H2O2, HOAc / tetrahydrofuran / 1 h / 0 °C View Scheme

triethylamine in pyridine; water 4 h; Ambient temperatureelectrolyzed, grafite plates, 0.01-0.25 A; Yield given. Yields of byproduct given. Title compound not separated from byproducts;