反应详情

4-fluorophenethyltriphenylphosphoniumbromide (4.2 g, 9 mmol) was dried and then dissolved in THF (10 ml), followed by stirring under ice cooling, adding potassium-t-butoxide (1.0 g, 9 mmol) slowly to the obtained reaction solution, stirring at room temperature for 2 hours after the completion of dropping, adding a THF (50 ml) solution of 4-(4-pentylcyclohexyl)-cyclohexylacetoaldehyde (2.7 g, 9.7 mmol) and further stirring for 5 hours, adding ether after the completion of reaction, filtering off the obtained white crystals deposited, concentrating the filtrate under reduced pressure, and purifying the obtained brown oil by means of silica gel column chromatography, to obtain a mixture (2.0 g, 5.2 mmol) of 1-(4-fluorophenyl)-4-(4-(4-pentylcyclohexyl)cyclohexyl)-2Z-butene with its E-isomer.

1. customslowly to the obtained reaction solution
2. stirringstirring at room temperature for 2 hours after the completion
3. stirringfurther stirring for 5 hours
4. customafter the completion of reaction
5. filtrationfiltering off the obtained white crystals
6. concentrationconcentrating the filtrate under reduced pressure
7. custompurifying the obtained brown oil by means of silica gel column chromatography