A greener approach for the synthesis of pyrido[2,3‐
<i>d</i>
]pyrimidine derivatives in glycerol under microwave heating
作者:Luan A. Martinho、Carlos Kleber Z. Andrade
DOI:10.1002/jhet.4483
日期:2022.8
Herein, we report the multicomponent synthesis of pyrido[2,3-d]pyrimidine derivatives from 6-aminouracil, aromatic aldehydes, and malononitrile in glycerol as a green solvent under microwave heating. This methodology shows several advantages: catalyst-free synthesis, up to 90% yield, operational simplicity, short reaction times, easy work-up procedure, and a greener approach compared with other methods
在此,我们报道了在微波加热下以甘油为绿色溶剂,以 6-氨基尿嘧啶、芳香醛和丙二腈为原料,合成吡啶并[2,3 - d ]嘧啶衍生物的多组分方法。与文献中报道的其他方法相比,该方法显示出几个优点:无催化剂合成、高达 90% 的产率、操作简单、反应时间短、后处理程序简单以及更环保的方法。
An expeditious one-pot synthesis of pyrido[2,3-d]pyrimidines using Fe3O4–ZnO–NH2–PW12O40 nanocatalyst
An efficient protocol for the facile synthesis of a series of pyrido[2,3-d]pyrimidine derivatives has been developed applying Fe3O4–ZnO–NH2–PW12O40 nanocatalyst in water. This novel method has the benefits of operational simplicity, green aspects by avoiding toxic solvents and high to excellent yields of products. Fe3O4–ZnO–NH2–PW12O40 was synthesized and characterized by Fourier transform infrared
使用 Fe3O4–ZnO–NH2–PW12O40 纳米催化剂在水中轻松合成一系列吡啶并 [2,3-d] 嘧啶衍生物的有效方案已被开发。这种新方法具有操作简单、绿色环保、避免使用有毒溶剂以及产品收率高的优点。 –ZnO–NH2–PW12O40 被合成并通过傅里叶变换红外、X 射线衍射、振动样品磁强计、扫描电子显微镜、能量色散 X 射线光谱和透射电子显微镜分析表征。纳米催化剂很容易通过外部磁铁从反应混合物中分离和回收。
KF‐Alumina Catalyzed One‐Pot Synthesis of Pyrido[2,3‐d]Pyrimidine Derivatives
A series of pyrido[2,3-d]pyrimidine derivatives was synthesized by the reaction of arylaldehyde, malononitrile. and 4-amino-2,6-dihydroxylpyrimidine in ethyl alcohol at 80degreesC catalyzed by KF-Al2O3. Compared with other synthetic methods, this new method has the advantage of easier workup, milder reaction conditions, and good yields.