反应详情

温度

60 °C

To a solution of 8-ethoxy-3-ethyl-1-(3-hydroxypropyl)-1H-purine-2,6(3H,7H)-dione (70 mg, 0.248 mmol, intermediate 26) in DMF (3 mL) was added 1-(bromomethyl)-4-chlorobenzene (80 mg, 0.390 mmol), followed by potassium carbonate (60 mg, 0.435 mmol). The mixture was stirred at 60° C. for 4 h, then diluted with ethyl acetate and water, and the phases were separated. The organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated to give a crude product which was purified by preparative HPLC to give 7-(4-chlorobenzyl)-8-ethoxy-3-ethyl-1-(3-hydroxypropyl)-1H-purine-2,6(3H,7H)-dione (15 mg, 14.9% yield) as white solid. 1H-NMR (DMSO-d6) δ 7.43-7.41(d, 2H), 7.34-7.32(d, 2H), 5.21(s, 2H), 4.53-4.44(m, 3H), 3.99-3.88(m, 4H), 3.45-3.39(m, 2H), 1.71-1.64(m, 2H), 1.37-1.33(t, 3H), 1.23-1.19(t, 3H). LCMS retention time 2.654 min; LCMS MH+ 407.

1. customthe phases were separated
2. washThe organic phase was washed with brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. customto give a crude product which
7. customwas purified by preparative HPLC