Synthesis, characterization and application of Fe
<sub>3</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
@CPTMO@DEA‐SO
<sub>3</sub>
H nanoparticles supported on bentonite nanoclay as a magnetic catalyst for the synthesis of 1,4‐dihydropyrano[2,3‐c]pyrazoles
作者:Behrouz Eftekhari far、Masoud Nasr‐Esfahani
DOI:10.1002/aoc.5406
日期:2020.3
thermal gravimetric analysis. The new catalyst benefits from a simple preparation method, and environmentally friendly and high magnetic properties of the nanocatalyst, Accordingly, we used it for the synthesis of dihydropyrano[2,3c]pyrazole derivatives in water and ethanol mixture as a green solvent under reflux conditions. Use of mild conditions, easy catalyst separation, cost‐effectiveness, short
制备Fe 3 O 4纳米颗粒,并将其装饰在纳米膨润土(NB)的表面上,然后通过有机和无机连接基进行改性,然后将磺酸固定在纳米颗粒上。NB‐Fe 3 O 4 @SiO 2 @ CPTMO @ DEA‐SO 3H催化剂通过傅立叶变换红外光谱,扫描电子显微镜,能量色散X射线光谱,振动样品磁力计,X射线衍射图,Brunauer-Emmett-Teller和热重分析进行了表征。这种新型催化剂得益于简单的制备方法,环保和高磁性的纳米催化剂,因此,我们将其用于水和乙醇混合物中作为绿色溶剂在回流条件下合成二氢吡喃并[2,3c]吡唑衍生物。 。使用温和的条件,易于分离催化剂,成本效益,反应时间短,催化剂的可重复使用性,优异的收率和易于后处理是本方法的主要优点。