Hydrochloric Acid → HCID 68153450, compound

Participants

Reaction Steps

To a solution of ethyl 7-chloropyrazolo[1,5-a]pyrimidine-3-carboxylate (68 mg, 0.30 mmol) in CH3CN (1 mL) was added N-methylethanamine (18 mg, 0.30 mmol) and the mixture was stirred at ambient temperature for 16 h. The mixture was evaporated and the residue was purified by column chromatography (0-10% MeOH in dichloromethane) to give a solid. The solid was taken up in EtOH (0.5 mL) and water (0.1 mL) before NaOH (12 mg, 0.30 mmol) was added. The mixture was stirred at 50° C. for 4 h. The pH of the mixture was adjusted to 4 with conc. HCl, and the solvents were removed. The residue was co-evaporated with MeOH (3×) to provide 7-(ethyl(methyl)amino)pyrazolo[1,5-a]pyrimidine-3-carboxylic acid. ESI-MS m/z calc. 220.1, found 221.5 (M+1)+; Retention time: 0.29 minutes (3 min run).

Provenance & Evidence