1.1: 79 percent / sodium hydride / tetrahydrofuran / 0.75 h / cooling 2.1: BuLi; i-Pr2NH / hexane; tetrahydrofuran / 1 h / -78 °C 2.2: 68 percent / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 3.1: 66 percent / lithium aluminum hydride / tetrahydrofuran / 0.5 h / cooling 4.2: 84 percent / H2 / Pd/C View Scheme

1.1: 79 percent / sodium hydride / tetrahydrofuran / 0.75 h / cooling 2.1: BuLi; i-Pr2NH / hexane; tetrahydrofuran / 1 h / -78 °C 2.2: 68 percent / hexane; tetrahydrofuran / 2 h / -78 - 20 °C 3.1: 66 percent / lithium aluminum hydride / tetrahydrofuran / 0.5 h / cooling View Scheme