反应详情

Trimethylsilylacetic acid (0.1 mmole) and N-hydroxyphthalimide (0.1 mmole) were weighed under N2 and placed in a conical flask with 2 side arms (flask A). Dry THF/dioxane (0.5 mL) was added and removed carefully under vacuum to dry the substrates. THF (0.4 mL) was added and mixed to dissolve the substrates. DCC (95 μL, 1 M solution in methylene chloride) dried on activated molecular sieves was added and mixed. The reaction was stirred 3 hours, and a precipitate formed after 10 minutes. THF was removed under vacuum to dryness. Dry ether was added (1 mL) and mixed to dissolve the product of coupling, the reaction was left for 5 minutes for the by-product dicyclohexylurea to settle. The upper layer was transferred and filtered into the second flask. Dry ether (0.5 mL) was added, mixed and the upper layer was again transferred as above. The ether was removed under vacuum to leave the TMS-acetoxyphthalimide as a white solid.

1. customplaced in a conical flask with 2 side arms
2. customremoved carefully under vacuum
3. customto dry the substrates
4. additionTHF (0.4 mL) was added
5. additionmixed
6. dissolutionto dissolve the substrates
7. dry with materialDCC (95 μL, 1 M solution in methylene chloride) dried on activated molecular sieves
8. additionwas added
9. additionmixed
10. customa precipitate formed after 10 minutes
11. customTHF was removed under vacuum to dryness
12. additionDry ether was added (1 mL)
13. additionmixed
14. dissolutionto dissolve the product of coupling
15. waitthe reaction was left for 5 minutes for the by-product dicyclohexylurea
16. filtrationfiltered into the second flask
17. additionDry ether (0.5 mL) was added
18. additionmixed
19. customThe ether was removed under vacuum