反应详情

To a suspension of 0.08 g (2.1 mmol)of lithium aluminium hydride in dry diethyl ether was added dropwise in nitrogen gas a solution of 0.766 g (2.05 mmol)of methyl [5-(3,5-dichlorophenylthio)-4-isopropyl-1-methyl-1H-imidazol-2-yl]acetate (33)in diethyl ether (10 ml)under ice-cooling over 10 minutes with stirring. The reaction mixture was stirred at the same temperature for 0.5 hours and at room temperature for 1 hour, and then, there was added ice-water. The ether layer was separated by decantation, and the aqueous layer was extracted with diethyl ether. The ether extracts were combined, dried over magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was recrystallized from isopropyl ether, and filtered to give 0.58 g of 2-[5-(3,5-dichlorophenylthio)-4-isopropyl-1-methyl-1H-imidazol-2-yl]ethanol (Compound I-81a)(yield 82%).

1. temperaturecooling over 10 minutes
2. stirringThe reaction mixture was stirred at the same temperature for 0.5 hours and at room temperature for 1 hour
3. customThe ether layer was separated by decantation
4. extractionthe aqueous layer was extracted with diethyl ether
5. dry with materialdried over magnesium sulfate
6. distillationthe solvent was distilled off under reduced pressure
7. customThe residue was recrystallized from isopropyl ether
8. filtrationfiltered