ammonia in methanol Ambient temperature;

1: 1) (NH4)2SO4, hexamethyldisilazane 2) trimethylsilyl trifluoromethanesulfonate / 1) reflux, 3h 2) CH3CN, 0-5 deg C, 1h 2: 75 percent / NH3 / methanol / Ambient temperature View Scheme

1: 60 percent / 1N HCl / 0.5 h / Heating 2: 1) (NH4)2SO4, hexamethyldisilazane 2) trimethylsilyl trifluoromethanesulfonate / 1) reflux, 3h 2) CH3CN, 0-5 deg C, 1h 3: 75 percent / NH3 / methanol / Ambient temperature View Scheme