反应详情

To a solution of 1-[(2-acetoxyethoxy)methyl]thymine (4 g, 16 mmol) in CH3OH (100 mL) was added NaOCH3 in CH3OH (20 mL, 1N). After 2 hours of stirring at room temperature, 1N HCl was added to adjust the pH to 4.0. Methanol and water were removed under vacuum to obtain a solid. The solid was dissolved in CH3OH and crystallized by dropwise addition of CHCl3; it was used in the next reaction without further purification. Yield 76%; Wt. 2.5 g; mp 154°-156° C.; 1H NMR (DMSO-d6) 1.75 (s, CH3 C5 thymine), 3.55-3.75 (A2B2 pattern, O CH2 CH2 O), 5.10 (s, O CH2 N), 7.55 (s, H C6 thymine), 11.3 (s, HN thymine).

1. customMethanol and water were removed under vacuum
2. customto obtain a solid
3. customcrystallized by dropwise addition of CHCl3
4. customit was used in the next reaction without further purification