1.1: triethylamine / dichloromethane / 5 h / 0 - 20 °C 2.1: sodium hydride / hexane; tetrahydrofuran; mineral oil / 1 h / 0 - 20 °C 2.2: 20 °C 2.3: 0 °C 3.1: hydrogen / palladium 10 on activated carbon / ethyl acetate / 144 h / 760.05 Torr 4.1: naphthalene; sodium / tetrahydrofuran / 0.08 h / 0 °C View Scheme