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 (0.028 g, 0.076 mmol), EtOH (1.3 mL) and DMF (0.18 mL), tert-butyl-4-(4-formylbenzyl)piperazine-1-carboxylate (0.025 g, 0.083 mmol) was added followed by a freshly prepared aqueous solution of Na2S2O4 (1M; 0.23 mL, 0.23 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) to give the title compound as a solid (0.009 g, 18%); 1H-NMR (500 Mz, DMSO-d6): δ 1.39 (s, 9H, C(CH3)3), 2.34 (t, J=5.0 Hz, 4H), 2.62-2.70 (m, 7H), 3.29-3.35 (m, 4H), 3.55 (s, 2H, NCH2), 3.64 (s, 2H, NCH2), 3.67-3.74 (m, 4H), 7.32 (s, 1H, thiazole 5-H), 7.46 (d, J=8.0 Hz, 2H, ArH, C6H4), 8.10 (s, 1H, imidazo[4,5-b]pyridine 5-H), 8.13 (d, J=8.0 Hz, 2H, ArH, C6H4), 13.44 (br s, 1H, imidazo[4,5-b]pyridine N—H); LC (Method B)-MS (ESI, m/z) 2.66 min—623/625 [(M+H)+, Cl isotopic pattern]. ESI-HRMS: Found: 623.2680, calculated for C31H40ClN8O2S (M+H)+: 623.2683.

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