反应详情

温度

0 °C

Methanesulfonyl chloride (19.3 mL) was slowly added dropwise to a solution of cis-4-methylcyclohexanol (14.2 g) and triethylamine (34.5 mL) in methylene chloride (250 mL) with stirring at 0° C. The mixture was heated to room temperature, stirred for 3 hours, and then separated into aqueous and organic layers by the addition of water, followed by extraction with methylene chloride. The organic layer was washed with saturated sodium bicarbonate and saturated sodium chloride solution and then dried over anhydrous sodium sulfate. After filtration and concentration under reduced pressure, the obtained crude product of cis-4-methylcyclohexyl methanesulfonate (approximately 24 g) was used without further purification in the next reaction. Cesium carbonate (60.1 g) and cis-4-methylcyclohexyl methanesulfonate (approximately 24 g) were added to a solution of ethyl 1H-imidazol-4-ylacetate (9.48 g) in N,N-dimethylformamide (120 mL). The mixture was stirred at 110° C. for 9 hours and then separated into aqueous and organic layers by the addition of water, followed by extraction with ethyl acetate. The organic layer was washed with saturated sodium chloride solution and then dried over anhydrous sodium sulfate. After filtration and concentration under reduced pressure, the obtained crude product was purified by silica gel column chromatography to obtain the title compound (1.77 g).

1. temperatureThe mixture was heated to room temperature
2. stirringstirred for 3 hours
3. customseparated into aqueous and organic layers
4. additionby the addition of water
5. extractionfollowed by extraction with methylene chloride
6. washThe organic layer was washed with saturated sodium bicarbonate and saturated sodium chloride solution
7. dry with materialdried over anhydrous sodium sulfate
8. filtrationAfter filtration and concentration under reduced pressure