反应详情

温度

70 °C

A mixture of 2-(pyridin-3-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylamine (480 mg, 2.27 mmol), 4-(ethoxycarbonyl)-1-methyl-1H-pyrazole-5-carboxylic acid (495 mg, 2.5 mmol), propylphosphonic anhydride in ethyl acetate 50% (3.62 g, 3.35 ml, 5.68 mmol) and N,N-diisopropylethylamine (1.17 g, 1.55 ml, 9.09 mmol) in tetrahydrofuran (10 ml) was stirred for 18 hours at 70° C. The solvent was evaporated under reduced pressure, the residue was triturated with saturated aqueous sodium hydrogencarbonate. The precipitated solid was filtered off, washed with water and dried in vacuo, affording 1-methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid ethyl ester (825 mg, 93%) as light brown solid. Mp.: 217° C. MS: m/z=392.1 (M+H+).

1. customThe solvent was evaporated under reduced pressure
2. customthe residue was triturated with saturated aqueous sodium hydrogencarbonate
3. filtrationThe precipitated solid was filtered off
4. washwashed with water
5. customdried in vacuo