sodium tetrahydroborate in water 24 h;

Hydrogenation;

water T=120°C;

water

hydroxylamine hydrochloride; sodium acetate in ethanol Condensation; 1.5 h;

1: 77 percent / hydroxylamine hydrochloride; sodium acetate / ethanol / 1.5 h 2: 60 percent / pyridine / 24 h / -5 °C 3: 90 percent / hydrogen / Pd(OH)2/C / dioxane; methanol / 4 h / 20 °C 4: 95 percent / ammonia / methanol / 0.5 h / 20 °C View Scheme