1.1: pyridine; hydroxylamine hydrochloride / ethanol / 22 h / 0 - 70 °C 2.1: diisobutylaluminium hydride / dichloromethane / 4 h / 0 °C 2.2: 0.33 h / 0 °C 2.3: 0 °C / pH > 9 3.1: potassium carbonate / N,N-dimethyl-formamide / 20 h / 50 °C 4.1: hydrogenchloride; 5 Pd(II)/C(eggshell); hydrogen / methanol / 7 h / 20 °C View Scheme

pyrrolidine in methanol 18 h; Heating;