1.1: 4-(N,N-dimethlyamino)pyridine; N-ethyl-N,N-diisopropylamine / 1-methyl-pyrrolidin-2-one / 33 h / 20 - 100 °C / Inert atmosphere 2.1: hydrogenchloride; hydrogen / palladium on activated charcoal / methanol / 5 h / 20 °C / 3450.35 - 4875.49 Torr 2.2: 120 h View Scheme