反应详情

4-[({3-[(3,5-dimethoxyphenyl)amino]quinoxalin-2-yl}amino)sulfonyl]benzoic acid (162 mg; 0.34 mmol; 1 eq.), EDC-HCl (71.10 mg; 0.37 mmol; 1.10 eq.) and HOBT (50.11 mg; 0.37 mmol; 1.10 eq.) were taken up in DCM (6 ml) then DIEA (84.89 μl; 0.51 mmol; 1.50 eq.) and 1-methylpiperazine (37.52 μl; 0.34 mmol; 1 eq.) were added. The mixture was stirred at rt for 5 h. The solution was washed successively with a saturated solution of NaHCO3, NH4Cl and NaCl. The organic phase was dried over MgSO4 and concentrated to near dryness to afford 171 mg (90%) of the title compound as a yellow powder. 1H NMR (DMSO-d6) δ 10.06 (br s, 1H), 8.80 (s, 1H), 8.13 (d, J=8.3 Hz, 2H), 7.47 (d, J=8.3 Hz, 2H), 7.44-7.41 (m, 1H), 7.39-7.34 (m, 1H), 7.31 (br d, 2H), 7.21-7.14 (m, 2H), 6.15 (t, J=2.3 Hz, 1H), 3.76 (s, 6H), 3.65-3.35 (m, 4H), 3.10-2.85 (m, 4H), 2.63 (s, 3H). HPLC (max plot) 97.1%; Rt 3.55 min. LC/MS: (ES+): 563.4, (ES−): 561.2.

1. washThe solution was washed successively with a saturated solution of NaHCO3, NH4Cl and NaCl
2. dry with materialThe organic phase was dried over MgSO4
3. concentrationconcentrated