Hydrochloric Acid → HCID 86600318, compound

Participants

Reaction Steps

0.35 g (0.001 mol) of atropisomer A of methyl 5-chloro-6-(2-chloro-4-cyanophenyl)-7-[(R)-3-methyl-2-butylamino]pyrazolo[1,5-a]pyrimidine-3-carboxylate were dissolved in 4.6 ml of dioxane. 0.37 g (0.009 mol) of potassium hydroxide in 4.6 ml of aqueous solution was added at room temperature, and the reaction mixture was then stirred for 12 hours. The mixture was then poured into water and acidified with hydrochloric acid. 0.15 g of product was filtered off. The product was chromatographed on silica gel using ethyl acetate:cyclohexane:acetic acid=40:10:1, which gave the atropisomer A of 5-chloro-6-(2-chloro-4-cyanophenyl)-7-[(R)-3-methyl-2-butyl-amino]pyrazolo[1,5-a]pyrimidine-3-carboxylic acid.

Provenance & Evidence