1: 69 percent / LiAlH4, 18-crown-6 / pentane / 5 h / 60 °C 2: 68 percent / 5percent Pd/Al2O3 / hexane / 6 h / Ambient temperature View Scheme

lithium aluminium tetrahydride; 18-crown-6 ether in pentane T=60°C; 5 h;