反应详情

A solution (20 ml) of 2-(5-hexyloxy-1H-indol-2-yl)thio-2-phenylpropionic acid (2.81 g) in anhydrous tetrahydrofuran was added dropwise to a suspension (10 ml) of lithium aluminum hydride (0.4 g) in anhydrous tetrahydrofuran, and the mixture was heated and refluxed for 30 minutes. The reaction solution was allowed to cool, and was poured into ice water. The mixture was acidified by adding 6N hydrochloric acid, and extracted with ethyl acetate. The organic layer was washed with water, and a saturated aqueous sodium chloride solution, and was dried over anhydrous sodium sulfate. The solvent was evaporated, and the residue was crystallized by adding n-hexane. The crude crystalline matter was recrystallized from ethanol to give 1.66 g (yield: 61 %) of the product compound as a pale green prism crystal. The melting point was 93.5°-95.5° C.

1. temperaturethe mixture was heated
2. temperaturerefluxed for 30 minutes
3. temperatureto cool
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with water
6. dry with materiala saturated aqueous sodium chloride solution, and was dried over anhydrous sodium sulfate
7. customThe solvent was evaporated
8. customthe residue was crystallized
9. additionby adding n-hexane
10. customThe crude crystalline matter was recrystallized from ethanol