Lithium hydroxide, monohydrate → 5-(2-isopropyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1-methyl-1H-pyrazole-4-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 5-(2-isopropyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1-methyl-1H-pyrazole-4-carboxylate (330 mg, 926 μmol) and lithium hydroxide monohydrate (155 mg, 3.7 mmol) in methanol (6 ml) and water (2 ml) is stirred for 18 hours at 25° C. The solvents are evaporated, the white residue is dissolved in water and acidified with 37% aqueous hydrochloric acid. The precipitated white solid is collected by filtration, washed with water and dried affording 5-(2-isopropyl-[1,2,4]triazolo[1,5-a]pyridin-7-ylcarbamoyl)-1-methyl-1H-pyrazole-4-carboxylic acid (285 mg, 93.7%) as a white solid. Mp.: >250° C. MS: m/z=327.3 (M−H+).

Provenance & Evidence