反应详情

To a solution of 9-cyclopentyl-N-(5,6,7,8-tetrahydro-1,6-naphthyridin-2-yl)-9H-pyrido[4′,3′:4,5]pyrrolo[2,3-d]pyrimidin-2-amine (21) (145 mg, 0.367 mmol) in DMF (10 mL) were added 2-hydroxyacetic acid (34.3 mg, 0.451 mmol), EDC (191.7 mg, 0.451 mmol), N-hydroxybenzotriazole (61 mg, 0.451 mmol), and N,N-diisopropylethylamine (157 uL, 0.903 mmol). The mixture thus obtained was stirred at room temperature for 2 hours. The reaction mixture was concentrated, and the residue was purified by flash chromatography on silica gel eluting with 20% to 75% solvent A (DCM:MeOH:NH4OH, 100:10:1) to give the title compound as an off-white solid (117 mg, 70% yield). 1H NMR (500 MHz, DMSO-d6) δ 1.77-1.80 (2H, m), 2.07-2.10 (4H, m), 2.42-2.44 (2H, m), 2.82-2.91 (2H, m), 3.66-3.82 (2H, m), 4.18-4.20 (2H, m), 4.57-4.66 (2H, m), 5.36 (1H, m), 7.68 (1H, d, J=10.0 Hz), 8.06 (1H, d, J=5.0 Hz), 8.19 (1H, d, J=10.0 Hz), 8.48 (1H, d, J=5.0 Hz), 9.03 (1H, s), 9.31 (1H, s) 9.98 (1H, br. s) ppm; LCMS m/z: 444 (M+1).

1. customThe mixture thus obtained
2. concentrationThe reaction mixture was concentrated
3. customthe residue was purified by flash chromatography on silica gel eluting with 20% to 75% solvent A (DCM:MeOH:NH4OH, 100:10:1)