反应详情

1-methyl-3-pentyl-3,7-dihydro-1H-purine-2,6-dione (0.06 g, 0.25 mmol) was dissolved in DMF (2 ml) and N-bromosuccinamide (0.045 g, 0.25 mmol) added. The mixture was stirred for 18 h, concentrated and the crude purified by eluting through an aminopropyl SPE (5 g) with first methanol then 5% acetic acid/methanol to elute product. The product was further purified by mass directed auto prep to yield the title compound as a white solid (0.01 g, 12%). NMR δH (400 MHz, d6-DMSO) 0.86 (t, 3H, J=7 Hz), 1.21-1.35 (m, 4H), 1.59-1.68 (m, 2H), 3.22 (s, 3H), 3.91 (t, 2H, J=7.5 Hz), 14.39 (br. s, 1H); m/z 315, 317 [MH+].

1. concentrationconcentrated
2. customthe crude purified
3. washby eluting through an aminopropyl SPE (5 g) with first methanol
4. wash5% acetic acid/methanol to elute product
5. customThe product was further purified by mass