1: 71 percent / NaHCO3, 55percent m-chloroperbenzoic acid / CH2Cl2 / 12 h / Ambient temperature 2: 1.) CuBr / 1.) Et2O, -30 deg C, 30 min, 2.) Et2O, r.t., 12 h View Scheme

copper(I) bromide 1.) Et2O, -30 deg C, 30 min, 2.) Et2O, r.t., 12 h; Yield given. Multistep reaction. Yields of byproduct given;