Water → Methyl 2-(4-amino-3-nitrophenyl)-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-(isopropyl(methyl)amino)-2-(trifluoromethylsulfonyloxy)quinoxaline-6-carboxylate (1.0 g, 2.46 mmol) in DME (10 mL) was added 2-nitro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline (0.97 g, 3.69 mmol), Pd(PPh3)4 (90 mg, 0.12 mmol), Na2CO3 (781 mg, 7.38 mmol) and water (2 mL) with stirring for 40 minutes at 90° C. under an inert atmosphere of nitrogen in an oil bath. The reaction mixture was concentrated under vacuum to give the residue, which was purified via silica gel chromatography (1% to 5% ethyl acetate in petroleum ether) to afford methyl 2-(4-amino-3-nitrophenyl)-3-(isopropyl(methyl)amino)quinoxaline-6-carboxylate as a yellow solid (900 mg, 93%).

Provenance & Evidence