1.1: 97 percent / pyridinium chlorochromate; silica gel / CH2Cl2 / 3 h / 20 °C 2.1: magnesium / tetrahydrofuran 2.2: 70 percent / tetrahydrofuran / 4 h / 20 °C 3.1: 83 percent / pyridinium chlorochromate; silica gel / CH2Cl2 / 30 h / 20 °C 4.1: 70 percent / sodium borohydride / methanol / 2 h / cooling 5.1: 47 percent / propionic acid / 48 h / 180 °C 6.1: 98 percent / PhCH=RhCl2(PCy3)2 / CH2Cl2 / 4 h / 20 °C 7.1: hydrogen / Pd/C / ethanol / 3 h / 20 °C / 760 Torr 8.1: 84 mg / LiAlH4 / diethyl ether / 0.75 h / 0 - 20 °C 9.1: pyridinium chlorochromate; silica gel / CH2Cl2 / 0.5 h / 20 °C 10.1: 14 mg / (PPh3)3RhCl / benzene / 48 h / 120 - 130 °C 11.1: lithium; liq. ammonia / ethanol; tetrahydrofuran / 2.5 h 12.1: 147 mg / sulphuric acid / tetrahydrofuran; H2O / 0.83 h / 20 °C View Scheme