反应详情

温度

100 °C

A mixture of 5-chloro-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (250 mg), 3-bromo-5-nitrophenol (170 mg), potassium carbonate (138 mg), and N-methylpyrrolidone (5 mL) was stirred at 100° C. for 4 hours. To the reactant was added water, followed by extraction with ethyl acetate. The organic phase was washed with water and saturated brine, and dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent; chloroform:methanol=1:0-9:1) to obtain 5-(3-bromo-5-nitrophenoxy)-6-ethyl-3-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrazine-2-carboxamide (336 mg) as a yellow solid.

1. extractionfollowed by extraction with ethyl acetate
2. washThe organic phase was washed with water and saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customthe solvent was evaporated under reduced pressure
5. customThe obtained residue was purified by silica gel column chromatography (eluent; chloroform:methanol=1:0-9:1)