hydrogen bromide; acetic acid 75 h; Reflux;

hydrogenchloride in ethanol; water

1: 97 percent / POCl3 / 2 h / 120 °C 2: 98 percent / N2H4*H2O / 5percent Pd/C / ethanol / Heating 3: 74 percent / NaCNBH3, conc. HCl / ethanol / 1) RT, 1 h, 2) 60 deg C, 2 h, 3) RT, overnight 4: 93 percent / conc. HCl, glacial HOAc / Heating 5: 17 percent / 20percent Pd-C / various solvent(s) / 150 °C View Scheme

hydrogenchloride; sodium cyanoborohydride in ethanol; water

nitric acid in acetic anhydride

nitric acid in acetic anhydride

hydrazine hydrate; palladium on activated charcoal in ethanol Heating;