1: 92 percent / Na, NH3(liq.) / diethyl ether 2: toluene / 48 h / Heating 3: 0.1 N HCl / Ambient temperature 4: toluene / pH = 8.4; buffer: LiOH, 85percent aq. H3PO4, CH3COOH, B(OH)3 5: 70 percent / Red-Al, CuBr / tetrahydrofuran; benzene / 1.) -78 deg C -> -20 deg C, 10 min., 2.) -20 deg C, 1.5 h View Scheme