反应详情

A mixture of 2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (0.15 g, 0.39 mmol), 1-tert-butylpiperazin-2-one (0.072 g, 0.46 mmol) and 4 Å molecular sieves (0.4 g) in DCE (5 mL) was stirred for 4 h at room temperature. Sodium triacetoxyborohydride (0.163 g, 0.77 mmol) was added and the reaction mixture was stirred for 18 h at room temperature. The reaction mixture was filtered through Celite and the filtrate was concentrated in vacuo. The residue was purified by flash chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 5:95) to give 577 as a white solid (0.178 g, 87%). LCMS (Method I): RT=3.59 min, [M+H]+ 532.2 1H NMR (400 MHz, DMSO-d6): δ 8.03-7.98 (m, 1 H), 7.65-7.60 (m, 1 H), 7.26-7.21 (m, 2 H), 4.50-3.95 (m, 5 H), 3.83-3.79 (m, 6 H), 3.78 (m, 4 H), 3.27 (q, J=7.4 Hz, 2 H), 3.08 (s, 2 H), 2.69-2.64 (m, 2 H), 1.36 (s, 9 H), 1.34 (t, J=7.4 Hz, 3 H)

1. stirringthe reaction mixture was stirred for 18 h at room temperature
2. filtrationThe reaction mixture was filtered through Celite
3. concentrationthe filtrate was concentrated in vacuo
4. customThe residue was purified by flash chromatography (Si—PPC, MeOH:DCM, gradient 0:100 to 5:95)