1,1'-Thiocarbonyldi-2(1H)-pyridone → 1-(4-isothiocyanato-2-methoxyphenyl)-3-methyl-1H-1,2,4-triazole

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Reaction Steps

Step F (3): Dichloromethane (125 mL) was added to a flask charged with 3-methoxy-4-(3-methyl-1H-1,2,4-triazol-1-yl)aniline (4.00 g, 19.59 mmol) and 1,1′-thiocarbonyldipyridin-2(1H)-one (4.55 g, 19.59 mmol). The resulting mixture was stirred for 24 h at rt. The crude reaction mixture was concentrated and the crude products were purified using silica gel chromatography (0-5% EtOAc/chloroform) linear gradient to afford 1-(4-isothiocyanato-2-methoxyphenyl)-3-methyl-1H-1,2,4-triazole (3.91 g, 15.88 mmol, 81% yield) as a white solid. LC-MS (M+H)+ 247.0. 1H NMR (500 MHz, chloroform-d) δ ppm 8.64 (s, 1 H) 7.78 (d, J=8.55 Hz, 1 H) 6.96 (dd, J=8.55, 2.14 Hz, 1 H) 6.90 (d, J=2.14 Hz, 1 H) 3.94 (s, 3 H) 2.48 (s, 3 H).

Provenance & Evidence