反应详情

温度

-30 °C

A solution of 2-bromo-3-methoxypyridine (1.65 g, 8.78 mmol) in THF was cooled to −78° C., and 5.23 ml (8.16 mmol) of a 1.57 N solution of n-butyllithium in n-hexane was added dropwise. The resulting mixture was stirred at the same temperature for 45 minutes, and a solution (15 ml) of 3-[2-(3,4-diethoxyphenyl)thiazole-4-yl]propionaldehyde (1.34 g, 4.39 mmol) in THF was added dropwise. After stirring at the same temperature for 30 minutes, the temperature of the mixture was raised to −30° C. over a period of 30 minutes. A saturated aqueous ammonium chloride solution was added to the reaction mixture, followed by extraction with ethyl acetate. The organic layer was washed with a saturated salt solution, and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/1). The solvent was distilled off under reduced pressure, and the residue was purified by preparative thin-layer silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/2). The solvent was distilled off under reduced pressure, to thereby obtain 470 mg (yield: 26%) of 3-[2-(3,4-diethoxyphenyl)thiazole-4-yl]-1-(3-methoxypyridine-2-yl)-1-propanol as a yellow oil.

1. stirringAfter stirring at the same temperature for 30 minutes
2. extractionfollowed by extraction with ethyl acetate
3. washThe organic layer was washed with a saturated salt solution
4. dry with materialdried over anhydrous sodium sulfate
5. distillationThe solvent was distilled off under reduced pressure
6. customthe residue was purified by silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/1)
7. distillationThe solvent was distilled off under reduced pressure
8. customthe residue was purified by preparative thin-layer silica gel column chromatography (eluent: ethyl acetate/n-hexane=1/2)
9. distillationThe solvent was distilled off under reduced pressure