1: 1) copper bromide dimethylsulfide complex, (CH3)2S / 1) THF, -40 deg C, 10 min, 2) THF, -15 deg C, 15 min 2: 97 percent / LiOH*H2O / tetrahydrofuran; H2O / 1) 0 deg C, 1 h, 2) 0 deg C to room temperature View Scheme