1: 81 percent / ammonium acetate / acetic acid / 2 h / Heating 2: 60 percent / Raney Ni / ethanol / 6 h / Heating View Scheme

1: ammonium acetate / acetic acid; tetrahydrofuran / 4 h / Heating 2: 80 percent / 1.) bis(triphenylphosphino)nickel(II) dichloride / diethyl ether / 1.) rt, 15 min 2.) reflux, 48 h View Scheme

1: 81 percent / ammonium acetate / acetic acid / 2 h / Heating 2: 79 percent / 85percent m-chloroperbenzoic acid (MCPBA) / CH2Cl2 / 4 h / Ambient temperature View Scheme

ammonium acetate in acetic acid 2 h; Heating;