反应详情

This was prepared using the same procedure as for 4-(6-bromo-2-(4-(dimethylamino)phenyl)-3H-imidazo[4,5-b]pyridin-7-yl)-N-phenylpiperazine-1-carboxamide, but here using 1-(2-(4-(2-amino-5-bromo-3-nitropyridin-4-yl)piperazin-1-yl)ethyl)-3-phenylurea (100 mg, 0.22 mmol), DMF (1.25 mL), 1M Na2S2O4 (3 eq, 0.66 mmol, 0.66 mL) and 4-(N,N-dimethylamino)benzaldehyde (1.05 eq, 0.23 mmol, 34 mg). After filtration, a small sample of the solid product was further purified by semi-preparative hplc to give the pure product as an off-white solid; 1H-NMR (500 MHz, DMSO-d6) 2.50 (2H, obscured by DMSO peak, NCH2), 2.53-2.57 (m, 4H, piperazine N(CH2)2), 3.00 (s, 6H, N(CH3)2), 3.27 (q, J=5.7 Hz, 2H, NHCH2), 3.67 (t, J=4.6 Hz, 4H, piperazine N(CH2)2), 6.13 (t, br, J=5.0 Hz, 1H, NHCH2), 6.82 (d, J=9.0 Hz, 2H, N,N-dimethylaminophenyl), 6.88 (tt, J=7.4, 1.0 Hz, 1H, phenyl H-4), 7.22 (dd, J=8.4, 7.5 Hz, 2H, phenyl H-3 & H-5), 7.40 (dd, J=8.5, 1.0 Hz, 2H, phenyl H-3 & H-5), 8.01 (d, J=8.9 Hz, 2H, N,N-dimethylaminophenyl), 8.16 (s, 1H, imidazo[4,5-b]pyridine H-5), 8.64 (br s, 1H, PhNH), 13.13 (br s, 1H, imidazo[4,5-b]pyridine NH);

1. customThis was prepared
2. filtrationAfter filtration
3. customa small sample of the solid product was further purified by semi-preparative hplc