1.1: hydrogenchloride / methanol; water / 11 h / 50 °C 2.1: 10 palladium on activated carbon; hydrogen / tetrahydrofuran / 3 h / 20 °C / 750.08 Torr 3.1: trifluoroacetic acid / 1.17 h / 0 °C / Inert atmosphere 3.2: 0 - 5 °C / Inert atmosphere 4.1: trifluorormethanesulfonic acid; acetic anhydride; acetic acid / 1 h / 20 °C / Inert atmosphere 5.1: sodium tetrahydroborate / methanol; dichloromethane / 1.33 h / 20 °C / Inert atmosphere View Scheme

2: H2 / Pd-C 3: 25 percent / K3Fe(CN)6 / methanol; triethylamine / 10 h / Heating View Scheme