反应详情

Step B (3): Dichloromethane (125 mL) was added to a flask charged with 2-fluoro-5-methoxy-4-(3-methyl-1H-1,2,4-triazol-1-yl)aniline (1.07 g, 4.82 mmol) and 1,1′-thiocarbonyldipyridin-2(1H)-one (1.12 g, 4.82 mmol). The resulting mixture was stirred for 24 h at rt and concentrated in vacuo. The crude residue was purified using silica gel chromatography (0-5% EtOAc/chloroform, linear gradient over 36 min, flow 25 mL/min) to afford 1-(5-fluoro-4-isothiocyanato-2-methoxyphenyl)-3-methyl-1H-1,2,4-triazole (950 mg, 75% yield) as a yellow solid. LC-MS (M+H)+ 265.1. 1H NMR (500 MHz, chloroform-d) δ ppm 8.74 (s, 1 H) 7.75 (d, J=10.07 Hz, 1 H) 6.84 (d, J=6.41 Hz, 1 H) 3.94 (s, 3 H) 2.48 (s, 3 H).

1. concentrationconcentrated in vacuo
2. customThe crude residue was purified
3. customsilica gel chromatography (0-5% EtOAc/chloroform, linear gradient over 36 min, flow 25 mL/min)