1: 1.) ether, RT, 24 h, 2.) ethanol, reflux, 2 h 2: K2CO3 / methanol; H2O / 2 h / Heating 3: dimethylformamide / 2 h / Ambient temperature 4: NH3 / CHCl3 / Ambient temperature 5: triethylamine, trifluoroacetic anhydride / CH2Cl2 / 0.33 h / Ambient temperature 6: hydroxylamine hydrochloride, KOH / ethanol / 4.5 h / Heating 7: 1 h / 100 °C View Scheme

T=100°C; 1 h;