反应详情

A mixture of 2-(2-ethylbenzoimidazol-1-yl)-9-methyl-6-morpholin-4-yl-9H-purine-8-carbaldehyde (0.207 g, 0.53 mmol), 1-azetidin-3-yl-4-methylpiperidin-4-ol (0.108 g, 0.63 mmol) and 4 Å molecular sieves (0.5 g) in DCE (5 mL)was stirred for 3 h at room temperature. Sodium triacetoxyborohydride (0.224 g, 1.06 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:EtOAc, gradient 0:100 to 30:70) to give 551 as a white solid (0.247 g, 86%). LCMS (Method I): RT=2.35 min, [M+H]+ 546.3. 1H NMR (400 MHz, DMSO-d6): δ 8.04-7.98 (m, 1 H); 7.65-7.60 (m, 1 H); 7.27-7.20 (m, 2 H); 4.34-3.83 (m, 4 H); 3.85 (s, 2 H); 3.79-3.75 (m, 7 H); 3.43 (t, J=7.4 Hz, 2 H); 3.31-3.20 (q, J=7.4 Hz, 2 H); 2.96-2.93 (m, 2 H); 2.92-2.83 (m, 1 H); 2.27-2.23 (m, 2 H); 2.18-2.14 (m, 2 H); 1.48-1.36 (m, 4 H); 1.33 (t, J=7.4 Hz, 3 H); 1.12-1.06 (s, 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:EtOAc, gradient 0:100 to 30:70)