1: 99 percent / hydrogen / Pd on activated C / ethanol / 3 h / 20 °C / 760 Torr 2: 98 percent / LiAlH4 / diethyl ether / 1 h / 0 °C 3: 89 percent / PCC; silica gel / CH2Cl2 / 0.5 h / 20 °C 4: 77 percent Turnov. / (Ph3P)3RhCl / benzene / 20 h / 120 - 130 °C View Scheme