反应详情

Step 2 1-(3-((tert-Butyldimethylsilyl)oxy)propyl)-7-(4-chlorobenzyl)-3-methyl-8-(2-morpholinoethoxy)-1H-purine-2,6(3H,7H)-dione (0.27 g, 0.46 mmol) was dissolved in ethanol (5 mL) and 6N aqueous HCl (1 mL) and stirred at room temperature for 1 h. The reaction was evaporated and azeotroped with methanol (3×10 mL). The solid residue was triturated with methanol (5 mL) and filtered. The white solid was washed with diethyl ether (2×10 mL) and high vacuum dried to give 7-(4-chlorobenzyl)-1-(3-hydroxypropyl)-3-methyl-8-(2-morpholinoethoxy)-1H-purine-2,6(3H,7H)-dione hydrochloride (0.14, 57% yield) as a white solid. LCMS retention time=1.908 min and 95% purity, LCMS MH+ 478. 1H NMR (DMSO-d6) δ 11.54 (s, HCl), 7.38 (dd, 4H, J=12 and 28 Hz), 5.33 (2, 2H), 4.82-4.89 (m, 2H), 3.75-3.95 (m, 2H), 3.58-3.64 (m, 2H), 3.33-3.44 (m, 5H), 3.06 (m, 2H), 1.62-1.72 (m, 2H).

1. customThe reaction was evaporated
2. customazeotroped with methanol (3×10 mL)
3. customThe solid residue was triturated with methanol (5 mL)
4. filtrationfiltered
5. washThe white solid was washed with diethyl ether (2×10 mL) and high vacuum
6. customdried