sodium dithionite; sodium hydrogencarbonate in water; acetonitrile T=40°C; 4 h;

percarbonate de O,O-t-butyl et O-cyclohexyl; iodine cloride 1.) irradiation, 2.) 55 deg C, 1 h; Yield givenMultistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

zinc in ethylene glycol T=130 - 140°C;