1.1: potassium carbonate / N,N-dimethyl-formamide / 0.83 h / 0 °C / Inert atmosphere 1.2: 200 h / 0 - 80 °C / Inert atmosphere 1.3: pH 1 2.1: acetic acid / 1 h / 100 °C 2.2: 2 h / Reflux 3.1: hydrogen / Raney Ni / methanol / 6 h / 50 °C / 2206.72 Torr 4.1: acetic acid / ethanol / 4 h / Reflux 5.1: diethyl ether; tetrahydrofuran / 2.5 h / 25 °C 5.2: 3 h / Reflux 6.1: hydrogen / palladium 10 on activated carbon / methanol / 5 h / 70 °C / 3677.86 Torr View Scheme