Potassium Carbonate → Methyl 2-(4-(4-chlorophenyl)piperidin-1-yl)-3-(4-fluorophenyl)quinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

Into a 10-mL sealed tube, was placed a solution of methyl 2-chloro-3-(4-fluorophenyl)quinoxaline-6-carboxylate (150 mg, 0.47 mmol, 1.00 equiv) in N,N-dimethylformamide (5 mL), 4-(4-chlorophenyl)piperidine hydrochloride (219 mg, 0.94 mmol, 2.00 equiv), potassium carbonate (326 mg, 2.36 mmol, 5.00 equiv). The resulting solution was stirred overnight at 100° C. in an oil bath. The reaction was then quenched by the addition of 20 mL of water. The resulting solution was extracted with dichloromethane/methanol (10:1) and the organic layers were combined. The resulting mixture was concentrated under vacuum. The residue was applied onto a silica gel column with ethyl acetate/petroleum ether (1:10). This resulted in 200 mg (89%) of methyl 2-(4-(4-chlorophenyl)piperidin-1-yl)-3-(4-fluorophenyl)quinoxaline-6-carboxylate as a yellow solid.

Provenance & Evidence