Hydrochloric Acid → 1-Methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid

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Reaction Conditions

Reaction Steps

A mixture of ethyl 1-methyl-5-(2-(pyridin-3-yl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylate (810 mg, 2.07 mmol) and lithium hydroxide hydrate (434 mg, 10.3 mmol) in methanol (30 ml) and water (5 ml) was stirred for 18 hours at 25° C. The mixture was adjusted to pH=7 using hydrochloric acid (2 molar, 5.15 ml) and then evaporated to dryness under reduced pressure. 1-Methyl-5-(2-pyridin-3-yl-[1,2,4]triazolo[1,5-a]pyridin-6-ylcarbamoyl)-1H-pyrazole-4-carboxylic acid (1.38 g) as light brown solid was used without further purification. MS: m/z=364.1 (M+H+).

Provenance & Evidence