反应详情

6-amino-2-butylamino-9H-purine, intermediate 1 (9.93 g, 48.2 mmol) and Cs2CO3 (15.69 g, 48.2 mmol) were suspended in DMF (200 mL). 4-nitrobenzyl bromide (12.48 mg, 57.8 mmol) was added thereto and the mixture was stirred at rt for 18 h. After condensing the suspension in vacuo, to the residue was added brine and the mixture was extracted with ethyl acetate. The organic layer was washed the mixture was with brine, dried on MgSO4, filtered and the solvent was evaporated in vacuo. The residue was purified on column of silica gel (5% MeOH/DCM) to give the subject compound (11.51 g, yield 70%). Intermediate 59 was characterized by the following spectroscopic data: 1H NMR (DMSO-d6, 300 MHz) δ (ppm) 8.19 (d, 2H), 7.83 (s, 1H), 7.49 (d, 2H), 6.69 (sl, 2H), 6.25 (t, 1H), 5.34 (s, 2H), 3.17 (m, 2H), 1.41 (m, 2H), 1.25 (q, 2H), 0.83 (t, 3H).

1. customAfter condensing the suspension in vacuo
2. extractionthe mixture was extracted with ethyl acetate
3. washThe organic layer was washed the mixture
4. customdried on MgSO4
5. filtrationfiltered
6. customthe solvent was evaporated in vacuo
7. customThe residue was purified on column of silica gel (5% MeOH/DCM)