反应详情

温度

85 °C

To a mixture of 5-chloro-4-(4-((2-methylthiazol-4-yl)methyl)piperazin-1-yl)-3-nitropyridin-2-amine (0.060 g, 0.19 mmol), EtOH (3.3 mL) and DMF (0.44 mL), 4-(1H-pyrazol-1-ylmethyl)-benzaldehyde (0.039 g, 0.21 mmol) was added followed by a freshly prepared aqueous solution of Na2S2O4 (1M; 0.57 mL, 0.57 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; 92:8). The title compound was obtained after trituration with diethyl ether as a off-white solid (0.036 g, 37%); 1H-NMR (500 Mz, DMSO-d6): δ 2.62-2.69 (m, 7H), 3.63 (s, 2H, NCH2), 3.66-3.74 (m, 4H), 5.42 (s, 2H, NCH2), 6.30 (t, J=2.0 Hz, 1H), 7.31 (s, 1H, thiazole 5-H), 7.34 (d, J=8.0 Hz, 2H, ArH), 7.48-7.51 (m, 1H), 7.86 (m, 1H), 8.08-8.15 (m, 3H, 2ArH and imidazo[4,5-b]pyridine 5-H), 13.46 (br s, 1H, imidazo[4,5-b]pyridine N—H); LC (Method B)-MS (ESI, m/z) 3.16 min—505/507 [(M+H)+, Cl isotopic pattern]. ESI-HRMS: Found: 505.1687, calculated for C25H26N8SCl (M+H)+: 505.1690.

1. additionwas added
2. temperatureto cool to room temperature
3. washeluted with DCM/MeOH (v/v; 92:8)