反应详情

Step C (4): Methanolic ammonia (1.0 M, 100 mL, 100 mmol) was added to a flask charged with 1-(2-fluoro-4-isothiocyanatophenyl)-5-methyl-1H-1,2,4-triazole (3.18 g, 13.6 mmol) in a ice-water bath. After the addition was complete, the resulting slurry was stirred for 10 min and then allowed to warm to rt. After 24 h, the reaction mixture was concentrated in vacuo. The resulting solid was dried under high vacuum to afford 1-(3-fluoro-4-(5-methyl-1H-1,2,4-triazol-1-yl)phenyl)thiourea (3.21 g, 94% yield) as an off-white solid. LC-MS (M+H)+ 252.1. 1H NMR (500 MHz, DMSO-d6) δ ppm 8.06 (s, 1 H), 7.93 (dd, J=12.8, 2.1 Hz, 1 H), 7.54 (t, J=8.7 Hz, 1 H), 7.37 (dd, J=8.5, 1.8 Hz, 1 H), 2.32 (s, 3 H)

1. additionAfter the addition
2. waitAfter 24 h
3. concentrationthe reaction mixture was concentrated in vacuo
4. customThe resulting solid was dried under high vacuum