反应详情

A solution of thymidine dT (2.85 g, 11.76 mmol), imidiazole (2.44 g, 35.80 mmol) and TBSCl (1.77 g, 11.76 mmol) in anhydrous CH2Cl2 (20 mL) was stirred at room temperature overnight under a N2 atmosphere. The reaction mixture was then concentrated in vacuo to a viscous oil, followed by the addition of ethyl ether (60 mL) and water (60 mL). The organic layer was separated and washed twice with water (20 mL each), and the combined aqueous layer was extracted with ethyl ether (20 mL). The combined organic layer was dried over Na2SO4, concentrated in vacuo and purified by silica gel column chromatography to give 5′-O-tert-butyldimethylsilyl-thymidine dT.01 (3.44 g, 82%) as a white solid.

1. concentrationThe reaction mixture was then concentrated in vacuo to a viscous oil
2. additionfollowed by the addition of ethyl ether (60 mL) and water (60 mL)
3. customThe organic layer was separated
4. washwashed twice with water (20 mL each)
5. extractionthe combined aqueous layer was extracted with ethyl ether (20 mL)
6. dry with materialThe combined organic layer was dried over Na2SO4
7. concentrationconcentrated in vacuo
8. custompurified by silica gel column chromatography