1: 1) AgCO3; 2) triethylamine / 1) H2O, dioxane, r.t., 48 h; 2) H2O, dioxane, r.t., 36 h 2: 94 percent / K acetate, Pd/C / H2O; methanol 3: 71 percent / chromic anhydride-pyridine complex / 24 h / 40 °C 4: NH2OH / ethanol 5: 1) acetic anhydride, pyridine; 2) conc. ammonia / 2) CH3OH 6: CF3COOH / 2 h / 60 °C 7: cc. NH3 / dioxane / 2 h / 60 °C View Scheme