Potassium Phosphate, Tribasic → Methyl 3-[methyl(propan-2-yl)amino]-2-(5-phenylfuran-2-yl)quinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 4,4,5,5-tetramethyl-2-(5-phenylfuran-2-yl)-1,3,2-dioxaborolane (553 mg, 2.05 mmol) in dioxane (5.5 mL) and water (3 drops) was methyl 2-chloro-3-[methyl(propan-2-yl)amino]quinoxaline-6-carboxylate (200 mg, 0.68 mmol), K3PO4 (430 mg, 2.03 mmol) and Pd(PPh3)4 (39.3 mg, 0.03 mmol) with stirring for 1 h at 95° C. in an oil bath under an inert atmosphere of nitrogen. The reaction mixture was concentrated under reduced pressure to give the residue, which was purified by silica gel column chromatography (2% ethyl acetate in petroleum ether) to afford methyl 3-[methyl(propan-2-yl)amino]-2-(5-phenylfuran-2-yl)quinoxaline-6-carboxylate as light yellow solid (150 mg, 55%).

Provenance & Evidence