One‐pot synthesis of substituted chromeno[3,4‐b]quinoline derivatives was developed by three‐component reaction of aldehydes, dimedone or 1,3‐cyclohexadione, and 4‐aminocoumarin in the presence of nicotinic acid‐supported cobalt ferrite [CoFe2O4@SiO2@Si(CH2)3Cl@NA] as a novel magnetic catalyst in chloroform at reflux conditions. Nicotinic acid‐supported cobalt ferrite was characterized via Fourier
在烟酸支持的钴铁氧体[CoFe]存在下,通过醛,二甲酮或1,3-环己二酮和4-氨基香豆素的三组分反应,开发了取代的铬诺[3,4- b ]喹啉衍生物的一锅法合成方法。2 O 4 @SiO 2 @Si(CH 2)3Cl @ NA]作为一种新型的磁性催化剂在氯仿中回流条件下。烟酸负载的钴铁氧体通过傅里叶变换红外光谱,X射线衍射,热重分析,扫描电子显微镜,高分辨率透射电子显微镜,能量色散X射线光谱和振动样品磁强分析进行了表征。而且,该催化剂可以容易地通过磁分离回收并循环多达五次而不会显着降低其催化活性。在环境友好的条件下,经过适当的反应时间,生成的产品产率极高。该方法的显着优点是具有高效率,并且通过简单的磁引力容易将催化剂从产物中分离出来。
Facile one-pot synthesis of chromeno[4,3-<i>b</i>]quinoline derivatives catalyzed by Cu(II)-Schiff base/SBA-15
Abstract A novel, one-pot, simple, environmentally benign and efficient protocol has been employed for the synthesis of chromeno[4,3-b]quinolinederivatives in the presence of catalytic amounts of Cu(II)-Schiff base/SBA-15 under solvent-free conditions in excellent yields and rates.