反应详情

2-(7-(4-Chlorobenzyl)-3-methyl-2,6-dioxo-8-(3-(trifluoromethoxy)phenoxy)-2,3,6,7-tetrahydro-1H-purin-1-yl)acetic acid (0.25 g, 0.48 mmol, Example 361) and CDI (0.93 g, 0.57 mmol) were combined in DMF (4 mL) and stirred at room temperature for 20 min. Propan-1-amine was added and the reaction was stirred at room temperature for 3 h. The reaction was diluted with water (100 mL) and extracted with ethyl acetate (3×75 mL). The combined extracts were washed with 1N lithium chloride (2×75 mL), dried with magnesium sulfate, filtered and evaporated under reduced pressure to a white solid. Solid was purified using a 25 g silica gel flash column eluted with 1% methanol/DCM to give 2-(7-(4-chlorobenzyl)-3-methyl-2,6-dioxo-8-(3-(trifluoromethoxy)phenoxy)-2,3,6,7-tetrahydro-1H-purin-1-yl)-N-propylacetamide (0.13 g, 47% yield) as a white solid. LCMS retention time=4.070 min and 99% purity, LCMS MH+ 566. 1H NMR (DMSO-d6) δ 7.99 (t, NH), 7.60 (t, 1H, J=8 Hz), 7.48-7.52 (m, 1H), 7.39-7.46 (m, 5H), 7.32 (d, 1H, J=8 Hz), 5.42 (s, 2H), 4.42 (s, 2H), 3.31 (s, 3H), 3.00 (dd, 2H, J=8 Hz and 16 Hz), 1.34-1.45 (m, 2H), 0.83 (t, 3H, J=8 Hz).

1. stirringthe reaction was stirred at room temperature for 3 h
2. extractionextracted with ethyl acetate (3×75 mL)
3. washThe combined extracts were washed with 1N lithium chloride (2×75 mL)
4. dry with materialdried with magnesium sulfate
5. filtrationfiltered
6. customevaporated under reduced pressure to a white solid
7. customSolid was purified
8. washeluted with 1% methanol/DCM