反应详情

To a solution of N-propyl-4-[4-(trifluoromethyl)phenyl]-1,3-thiazol-2-amine hydrobromide (477 mg) in N,N-dimethylformamide (10 mL) was added sodium hydride (60%, oil, 104 mg) at 0° C., the temperature was raised to room temperature and the mixture was stirred for 30 min. Methyl 3-(4-{[4-(chloromethyl)benzyl]oxy}phenyl)propanoate (318 mg) was added to the reaction mixture at 0° C., the temperature was raised to room temperature and the mixture was stirred for 1 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was concentrated, and the residue was purified by silica gel column chromatography with ethyl acetate-hexane (gradient of 1:19 to 1:1 by volume ratio) to give a pale-yellow oil. This oil was dissolved in methanol (5 mL), 2N aqueous sodium hydroxide solution (5 mL) was added, and the mixture was stirred at room temperature for 3 hr. The reaction mixture was poured into 1N aqueous hydrochloric acid solution, and the precipitated solid was collected by filtration, washed successively with water and isopropyl ether and dried to give the title compound (230 mg, yield 42%) as colorless crystals.

1. temperaturethe temperature was raised to room temperature
2. stirringthe mixture was stirred for 1 hr
3. extractionthe mixture was extracted with ethyl acetate
4. concentrationThe ethyl acetate layer was concentrated
5. customthe residue was purified by silica gel column chromatography with ethyl acetate-hexane (gradient of 1:19 to 1:1 by volume ratio)
6. customto give a pale-yellow oil
7. stirringthe mixture was stirred at room temperature for 3 hr
8. filtrationthe precipitated solid was collected by filtration
9. washwashed successively with water and isopropyl ether
10. customdried