反应详情

温度

60 °C

To a solution of 2-(7-(4-chlorobenzyl)-3-methyl-2,6-dioxo-8-(3-(trifluoromethoxy)phenoxy)-2,3,6,7-tetrahydro-1H-purin-1-yl)acetic acid (80 mg, 0.152 mmol, example 9) in NMP (2 mL) was added TEA (0.1 mL, 0.614 mmol), 1-methylpiperazine (0.07 mL, 0.614 mmol) and O-(7-aza-1H-benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (87 mg, 0.231 mmol); then the mixture was stirred at 60° C. for 16 h. Then the mixture was diluted with ethyl acetate and water, the phases were separated. The organic phase was washed with brine, dried over sodium sulfate, filtered and concentrated to give crude product. This crude material was purified by recrystallization from methanol to give 7-(4-chlorobenzyl)-3-methyl-1-(2-(4-methylpiperazin-1-yl)-2-oxoethyl)-8-(3-(trifluoromethoxy)phenoxy)-1H-purine-2,6(3H,7H)-dione (25 mg, 27.5% yield) as white solid. 1H-NMR (DMSO-d6) δ 7.62-7.59(t, 1H), 7.55(s, 1H), 7.49-7.39(m, 5H), 7.36-7.34(d, 1H), 5.43(s, 2H), 4.71(s, 2H), 3.55-3.48(m, 4H), 3.30(s, 3H), 2.46-2.36(m, 4H), 2.21(s, 3H). LCMS retention time 2.298 min; LCMS MH+ 607.

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 crude product
7. customThis crude material was purified by recrystallization from methanol