反应详情

温度

100 °C

Step 1 7-(4-Chlorobenzyl)-3-methyl-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (1.0 g, 2.14 mmol, intermediate 9), 2-(3-bromopropyl)isoindoline-1,3-dione (0.63 g, 2.36 mmol), potassium carbonate (0.44 g, 3.21 mmol) and TBAI (0.040 g) were combined in DMF (20 mL) and heated at 100° C. for 3 h. The reaction was cooled to room temperature, diluted with water (200 mL) and extracted with ethyl acetate (3×100 mL). The combined organic extracts were washed with 1N lithium chloride (2×100 mL), dried with magnesium sulfate, filtered and the solvent removed under reduced pressure to give a clear oil. The oil was purified using an 80 g silica gel flash column eluted with a gradient of 25% to 50% ethyl acetate/hexanes to give 7-(4-chlorobenzyl)-1-(3-(1,3-dioxoisoindolin-2-yl)propyl)-3-methyl-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (1.4 g, 100% yield) as a white solid. LCMS retention time=4.660 minutes and 100% purity, LCMS MH+ 654. 1H NMR (CDCl3) δ 7.78-7.83 (m, 2H), 7.65-7.70 (m, 2H), 7.41 (t, 1H, J=8 Hz), 7.32 (dd, 4H, J=12 Hz and 28 Hz), 7.10-7.23 (m, 4H), 5.35 (s, 2H), 4.05-4.14 (m, 2H), 3.76 (t, 2H, J=8 Hz), 3.38 (s, 3H), 2.01-2.11 (m, 2H).

1. temperatureThe reaction was cooled to room temperature
2. extractionextracted with ethyl acetate (3×100 mL)
3. washThe combined organic extracts were washed with 1N lithium chloride (2×100 mL)
4. dry with materialdried with magnesium sulfate
5. filtrationfiltered
6. customthe solvent removed under reduced pressure
7. customto give a clear oil
8. customThe oil was purified
9. washeluted with a gradient of 25% to 50% ethyl acetate/hexanes