反应详情

To a solution of 4,4,5,5-tetramethyl-2-(4-phenylfuran-2-yl)-1,3,2-dioxaborolane (200 mg, crude) in dioxane (5.5 mL) and water (3 drops) was added methyl 2-chloro-3-[methyl(propan-2-yl)amino]quinoxaline-6-carboxylate (72 mg, 0.25 mmol), K3PO4 (156 mg, 0.73 mmol) and Pd(PPh3)4 (14 mg, 0.01 mmol) with stifling for 1 h at 95° C. in an oil bath which was maintained 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 eluting with 2% ethyl acetate in petroleum ether to afford methyl 3-[methyl(propan-2-yl)amino]-2-(5-phenylfuran-2-yl)quinoxaline-6-carboxylate as a light yellow solid (50 mg).

1. temperaturewhich was maintained under an inert atmosphere of nitrogen
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. customto give the residue, which
4. customwas purified by silica gel column chromatography
5. washeluting with 2% ethyl acetate in petroleum ether