反应详情

温度

10 °C

A 500 ml three necked round bottom flask was equipped with a mechanical stirrer, addition funnel, thermometer and an argon inlet and outlet. PCl5 (33 g; 0.159 mole) and 8 ml of dry toluene was added to the reaction vessel. 8.5 g (0.151 mole) of alpha-[((1-methylcyclohexyl)methoxy)methyl]-1-pyrrolidineethanol (the compound of Example 7b) was added to the addition funnel along with 5 ml of toluene. Hydrogen chloride gas was bubbled into the addition funnel until the solution was acidic. The PCl5 suspension was cooled to 10° C. and the amino alcohol hydrochloride solution was added dropwise, maintaining the temperature between 10°-15° C. After the addition was complete, the ice bath was removed and the mixture stirred at RT for 1.5 hr. A two liter beaker containing 116 ml of 45% potassium hydroxide and 210 g of ice was cooled in an ice bath. The reaction mixture (a clear yellow solution) was transferred to a separatory funnel and added portionwise at a rate to keep the reaction temperature at 25°-35° C. Stirring was continued for 0.5 hr after the addition. The reaction was transferred to a two liter separatory funnel and diluted with water and ether. The water layer was extracted twice with ether and the combined ether extracts were washed twice with water, once with brine, dried over anhydrous potassium carbonate and concentrated in vacuo to give 29.12 g of the title compound.

1. customHydrogen chloride gas was bubbled into the addition funnel until the solution
2. additionthe amino alcohol hydrochloride solution was added dropwise
3. temperaturemaintaining the temperature between 10°-15° C
4. additionAfter the addition
5. customthe ice bath was removed
6. additionA two liter beaker containing 116 ml of 45% potassium hydroxide and 210 g of ice
7. temperaturewas cooled in an ice bath
8. customThe reaction mixture (a clear yellow solution) was transferred to a separatory funnel
9. additionadded portionwise at a rate
10. customat 25°-35° C
11. stirringStirring
12. waitwas continued for 0.5 hr
13. additionafter the addition
14. customThe reaction was transferred to a two liter separatory funnel
15. additiondiluted with water and ether
16. extractionThe water layer was extracted twice with ether
17. washthe combined ether extracts were washed twice with water, once with brine
18. dry with materialdried over anhydrous potassium carbonate
19. concentrationconcentrated in vacuo