反应详情

温度

80 °C

To a mixture of 5-chloro-4-(4-(4-chlorobenzyl)piperazin-1-yl)-3-nitropyridin-2-amine (0.076 g, 0.20 mmol) and EtOH (4.0 mL) was added 1,3-dimethyl-1H-pyrazole-4-carbaldehyde (0.027 g, 0.22 mmol) followed by a freshly prepared aqueous solution of Na2S2O4 (1M; 0.85 mL, 0.85 mmol). The reaction mixture was stirred at 80° C. for 24 h, it was then allowed to cool to room temperature, concentrated in vacuo, and the residue was absorbed on silica gel and placed on a 10 g isolute silica column. Elution with ethyl acetate/dichloromethane (v/v; 1:1), and then 4% methanol in ethyl acetate/dichloromethane (v/v; 1:1) afforded the title compound as a white solid after trituration with diethyl ether (0.023 g, 25%).

1. temperatureto cool to room temperature
2. concentrationconcentrated in vacuo
3. customthe residue was absorbed on silica gel
4. washElution with ethyl acetate/dichloromethane (v/v; 1:1)