1.1: 60 percent / hydrogen chloride / methanol; dimethylformamide / 1 h / 20 °C 2.1: 72 percent / sodium hydride / dimethylformamide / 0.5 h 3.1: acetonitrile / Heating 3.2: 81 percent / tetrabutylammonium fluoride / acetonitrile; tetrahydrofuran / 1.5 h / Heating 4.1: LiAlH4 / diethyl ether / 1 h 5.1: 1.52 g / triethylamine / CHCl3 6.1: 1.30 g / pyridinium p-toluenesulfonate / methanol; CHCl3 / 1 h / Heating 7.1: trifluoroacetic acid / 0.08 h / 20 °C 8.1: H2 / 10 percent Pd/C / acetic acid; methanol / 760 Torr 8.2: 1 M hydrochloric acid View Scheme