反应详情

温度

90 °C

To a solution (5 mL) of ethyl 3-{[(4-{[(5-bromo-3-methyl-1-benzofuran-2-yl)(cyclohexyl)methyl]amino}phenyl)carbonyl]methyl)amino}propanoate (0.25 g) synthesized in the above-mentioned (3) in N,N-dimethylacetamide were added (6-methoxypyridin-3-yl)boronic acid (0.14 g), potassium carbonate (0.13 g) and tetrakistriphenylphosphine palladium (0.05 g), and the mixture was stirred at 90° C. for 12 hr under nitrogen atmosphere. The reaction mixture was cooled to room temperature, and filtered-through celite and the residue was washed with diethyl ether. Water was added to the filtrate, and the organic layer was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:1, volume ratio) to give ethyl 3-[{[4-({cyclohexyl[5-(6-methoxypyridin-3-yl)-3-methyl-1-benzofuran-2-yl]methyl}amino)phenyl]carbonyl}(methyl)amino]propanoate (0.15 g, 58%) as a pale-yellow oil. The obtained oil was dissolved in ethanol (1 mL), 1N aqueous sodium hydroxide solution (1.0 mL) was added at room temperature, and the mixture was stirred at room temperature for 0.5 hr. Ethanol was evaporated under reduced pressure, and 1N hydrochloric acid (1.0 mL) was added to the residue. The precipitate was washed with water to give the title object compound (0.12 g, 85%) as a pale-yellow solid.

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationfiltered-through celite
3. washthe residue was washed with diethyl ether
4. additionWater was added to the filtrate
5. concentrationthe organic layer was concentrated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:1, volume ratio)