反应详情

温度

0 °C

To a suspension of 3-amino-4-(methylamino)-6-(4-(pyridin-3-ylmethoxy)-3-(trifluoromethyl)phenyl)picolinonitrile (1.33 g) in water (15 ml) and 1,4-dioxane (15 ml), 2N hydrochloric acid (2.5 ml) was added at 0° C. and sodium nitrite (0.332 g) in water (3 ml) was added then stirred at 0° C. for 10 min then at 20° C. for 70 h. The reaction mixture was filtered, washed with water, dried in vacuum oven to give 1.14 g brown solid. Purified by Biotage SNAP cartridge KP-Sil column (100 g, heptane:ethyl acetate=1:0, 2:1, 1:1, 1:2 to 0:1 then ethyl acetate:methanol=25:1, 20:1 to 15:1 then dichloromethane:methanol=15:1, 10:1), fractions were passed through Strata SCX column (5 g) to give 560.7 mg light brown solid as 1-methyl-6-(4-(pyridin-3-ylmethoxy)-3-(trifluoromethyl)phenyl)-1H-[1,2,3]triazolo[4,5-c]pyridine-4-carbonitrile (41%).

1. additionwas added at 0° C.
2. waitat 20° C. for 70 h
3. filtrationThe reaction mixture was filtered
4. washwashed with water
5. customdried in vacuum oven