Hydrochloric Acid → 2-Phenyl-3-(4-(pyridin-2-yl)piperazin-1-yl)quinoxaline-6-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A solution of methyl 2-phenyl-3-(4-(pyridin-2-yl)piperazin-1-yl)quinoxaline-6-carboxylate (100 mg, 0.24 mmol, 1.00 equiv) and sodium hydroxide (47 mg, 1.18 mmol, 5.00 equiv) in methanol (10 mL) was placed in a 100-mL round bottom flask and stirred for 2 h at 50° C. in an oil bath. The pH of the solution was adjusted to 4-5 with hydrochloric acid (1 M), followed by extractions with 3×10 mL of dichloromethane. The organic layers were combined and concentrated under vacuum yielding 80 mg (83%) of 2-phenyl-3-(4-(pyridin-2-yl)piperazin-1-yl)quinoxaline-6-carboxylic acid as a yellow solid.

Provenance & Evidence