Diisopropylethylamine → HCID 70664906, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-chloro-2-(4-fluorophenyl)quinoxaline-6-carboxylate (450 mg, 1.42 mmol) in DMSO (5.0 ml) was added 2-(1,2,3,6-tetrahydropyridin-4-yl)pyridine (300 mg, 1.87 mmol) and DIEA (361 mg, 2.79 mmol), and the reaction mixture was stirred overnight at 90° C. The reaction mixture was extracted with ethyl acetate (3×50 ml), and the organic layers combined, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure to give the residue, which was purified by preparative silica gel plate chromatography (dichloromethane:ethyl acetate:petroleum ether (40:1:12)) to afford methyl 2-(4-fluorophenyl)-3-(4-(pyridin-2-yl)-5,6-dihydropyridin-1(2H)-yl)quinoxaline-6-carboxylate as a yellow solid (410 mg).

Provenance & Evidence