Pyridine → HCID 86670033, compound

Participants

Reaction Steps

Trifluoromethanesulfonic anhydride (315.6 mg, 1.12 mmol) was added to a solution of methyl 3-(3, 4-dihydroquinolin-1(2H)-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (200.0 mg, crude) and pyridine (176.8 mg, 2.24 mmol) in dichloromethane (50 ml). After stirring overnight at room temperature, the reaction was quenched with water (50 ml) and extracted with dichloromethane (3×80 ml). Then the organic layers were combined dried over anhydrous magnesium sulfate, and concentrated in vacuo to afford methyl 3-(3,4-dihydroquinolin-1(2H)-yl)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate as red oil (300 mg, crude), which was used directly in the next step.

Provenance & Evidence