Ultrasound promotes one-pot synthesis of 1,4-dihydropyridine and imidazo[1,2-a]quinoline derivatives, catalyzed by ZnO nanoparticles
作者:Mehdi Abaszadeh、Mohammad Seifi、Ali Asadipour
DOI:10.1007/s11164-014-1624-7
日期:2015.8
Ultrasonic irradiation is being considered not only as a green approach but also as a powerful technique for the synthesis of 1,4-dihydropyridine and imidazo[1,2-a]quinoline derivatives. It can be carried out by using multicomponent reaction of cyclic enaminoketones, malononitrile, and aromatic aldehydes, in the presence of catalytic amounts of zinc oxide nanoparticles, in EtOH, at 80 °C. The preponderance of such a catalyst is due to its inexpensiveness, stability, and the potential of being easily obtained. Furthermore, high conversions, short reaction times, and cleaner reaction profiles are some of the advantages of this method.
超声波辐照不仅被认为是一种绿色方法,而且还是一种合成 1,4-二氢吡啶和咪唑并[1,2-a]喹啉衍生物的强大技术。它可以在催化氧化锌纳米颗粒的存在下,在 80 ℃ 的乙醇中,通过环状烯酮酮、丙二腈和芳香醛的多组分反应来实现。这种催化剂的优势在于其低敏性、稳定性和易于获得的潜力。此外,高转化率、短反应时间和更清洁的反应曲线也是这种方法的一些优点。