1.1: pyridine; hydroxylamine hydrochloride / ethanol / 2 h / 20 °C / Inert atmosphere 2.1: sodium tetrahydroborate; molybdenum(VI) oxide / methanol / 0.5 h / 20 °C / Inert atmosphere 3.1: triethylsilane; titanium tetrachloride / dichloromethane / 7 h / -78 - -10 °C / Inert atmosphere 3.2: -10 °C / Inert atmosphere 4.1: methanol / 3 h / 20 °C / Inert atmosphere 5.1: pyridine / dichloromethane / 0.5 h / -10 - 0 °C / Inert atmosphere 6.1: sodium azide / water; acetone / 15 h / 20 °C 7.1: 2,6-dimethylpyridine / chloroform / 5 h / Inert atmosphere; Reflux 8.1: trifluoroacetic acid / dichloromethane / 1 h / 20 °C / Inert atmosphere; Cooling with ice 8.2: 55 °C / Inert atmosphere View Scheme