反应详情

To a stirred solution of trans-4-(1-hydroxymethyl)-cyclohexanecarboxylic acid (1.00 g, 6.32 mmol) and 2,6-lutidine (2.95 mL, 25.29 mmol) in DCM (61 mL) was added drop wise tert-butyldimethylsilyl triflate (4.36 mL, 18.96 mmol). The reaction mixture was stirred at RT for 1.5 hours. The reaction mixture was quenched with water and the organic phase removed. The aqueous phase was extracted with further DCM (×2). The combined organic extracts were combined and washed with brine, dried (magnesium sulfate), filtered and the solvent evaporated at reduced pressure. The residue was dissolved in THF (30 mL) and methanol (90 mL) and 10% aqueous potassium carbonate (30 mL) added. The reaction mixture was stirred at RT for 2 hours. The solvent was evaporated at reduced pressure and the residue partitioned between water and ether. The organic phase was discarded. The aqueous phase was washed with further ether (×2). The pH of the aqueous extract was adjusted to 5 and extracted with ethyl acetate (×3). The combined ethyl acetate extracts were washed with brine, dried (magnesium sulfate), filtered and the solvent evaporated at reduced pressure to afford the title compound (1.59 g, 93%).

1. customThe reaction mixture was quenched with water
2. customthe organic phase removed
3. extractionThe aqueous phase was extracted with further DCM (×2)
4. washwashed with brine
5. dry with materialdried (magnesium sulfate)
6. filtrationfiltered
7. customthe solvent evaporated at reduced pressure
8. dissolutionThe residue was dissolved in THF (30 mL)
9. additionmethanol (90 mL) and 10% aqueous potassium carbonate (30 mL) added
10. stirringThe reaction mixture was stirred at RT for 2 hours
11. customThe solvent was evaporated at reduced pressure
12. customthe residue partitioned between water and ether
13. washThe aqueous phase was washed with further ether (×2)
14. extractionThe pH of the aqueous extract
15. extractionextracted with ethyl acetate (×3)
16. washThe combined ethyl acetate extracts were washed with brine
17. dry with materialdried (magnesium sulfate)
18. filtrationfiltered
19. customthe solvent evaporated at reduced pressure