反应详情

温度

85 °C

To a mixture of 5-bromo-4-(4-((2-isopropylthiazol-4-yl)methyl)piperazin-1-yl)-3-nitropyridin-2-amine (0.066 g, 0.15 mmol), EtOH (2.6 mL) and DMF (0.35 mL), p-anisaldehyde (0.023 g, 0.165 mmol) was added followed by a freshly prepared aqueous solution of Na2S2O4 (1M; 0.45 mL, 0.45 mmol). The reaction mixture was heated at 85° C. for 24 h, then allowed to cool to room temperature and diluted with DCM and a few drops of aqueous NH3 until complete dissolution was observed. This solution was deposited on two preparative silica TLC plates and eluted with DCM/MeOH (v/v; 96:4) to give the title compound as a solid (0.019 g, 24%); 1H-NMR (500 Mz, DMSO-d6): δ 1.33 (d, J=7.0 Hz, 6H, iPr—CH3), 2.68 (m, 4H, piperazine N(CH2)2), 3.22-3.34 (m, 1H), 3.62-3.70 (m, 6H, piperazine N(CH2)2 and NCH2), 3.84 (s, 3H, OMe), 7.10 (d, J=9.0 Hz, 2H, ArH, C6H4—OMe), 7.35 (s, 1H, thiazole 5-H), 8.14 (d, J=9.0 Hz, 2H, ArH, C6H4—OMe), 8.20 (s, 1H, imidazo[4,5-b]pyridine 5-H), 13.33 (br s, 1H, imidazo[4,5-b]pyridine N—H); LC (Method B)-MS (ESI, m/z) 3.71 min—527/529 [(M+H)+, Br isotopic pattern]. ESI-HRMS: Found: 527.1232, calculated for C24H28BrN6OS (M+H)+: 527.1229.

1. additionwas added
2. temperatureto cool to room temperature
3. washeluted with DCM/MeOH (v/v; 96:4)