Tetraethylammonium 2-(carbamoyl)benzoate as a bifunctional organocatalyst for one-pot synthesis of Hantzsch 1,4-dihydropyridine and polyhydroquinoline derivatives
作者:Mahsa Yarhosseini、Shahrzad Javanshir、Mohammad G. Dekamin、Mohammad Farhadnia
DOI:10.1007/s00706-016-1666-1
日期:2016.10
environment-friendly approach for the synthesis of biologically active Hantzsch1,4-dihydropyridine and polyhydroquinoline derivatives in the presence of tetraethylammonium 2-(carbamoyl)benzoate, as an effective bifunctional metal-free catalyst, has been developed via a one-pot multicomponent reaction of various aldehydes, ethyl acetoacetate or cyclic 1,3-dicarbonyl compounds, and ammonium acetate in EtOH
Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions
After the characterization of this reagent, it was efficiently used for the promotion of the one-potsynthesis of hexahydroquinolines via one-potfour-component condensation of aryl aldehydes, 1,3-cyclohexadione derivatives, β-ketoesters and ammonium acetate under solvent-free conditions. The procedure gave the products in excellent yields in short reaction times and good to high yields. Also this catalyst
在这项研究中,4,4'-(1-丁烷1,4-丁二)双(1-磺基-1,4-二氮杂双环[2.2.2]辛烷-1,4-二鎓)四氯化物(NS-C 4(DABCO-使用不同类型的方法,包括FT-IR,1 H NMR,13 C NMR,质量,XRD,TGA,SEM和AFM分析,制备并表征了作为新型纳米级N-磺酸的SO 3 H)2)·4Cl)。该试剂的特征后,将其有效地用于促进一锅合成hexahydroquinolines的经由在无溶剂条件下,一锅四组分缩合芳基醛,1,3-环己二酮衍生物,β-酮酸酯和乙酸铵。该程序在短的反应时间内以优异的产率获得了产物,并且从良好的产率到高的产率。同样,该催化剂可以重复使用几次而不会损失其催化活性。
Magnetic Fe3O4 nanoparticles: Efficient and recoverable nanocatalyst for the synthesis of polyhydroquinolines and Hantzsch 1,4-dihydropyridines under solvent-free conditions
A green approach for efficient and rapid synthesis of biologically active substituted Hantzsch 1,4-dihydropyridine and polyhydroquinolinederivatives using magneticFe3O4 nanoparticles (Fe3O4 MNPs) as a recyclable catalyst undersolvent-freeconditions was reported. The catalyst was characterized by FT-IR, XRD, and TEM analysis. Compared to the classical reactions, this method consistently has the
报道了在无溶剂条件下使用磁性Fe 3 O 4纳米颗粒(Fe 3 O 4 MNPs)作为可循环利用催化剂高效,快速合成生物活性取代的Hantzsch 1,4-二氢吡啶和聚氢喹啉衍生物的绿色方法。通过FT-IR,XRD和TEM分析对催化剂进行了表征。与经典反应相比,该方法始终具有反应时间短,催化剂负载少,收率高,易于磁分离和催化剂可重复使用的优点。
1, 3-Disulfonic acid imidazolium hydrogen sulphate as an efficient and reusable ionic liquid for the multicomponent synthesis of polyhydroquinoline derivatives under solvent-free conditions
A facile and highlyeffective one-pot synthesis of polyhydroquinoline derivatives is reported via Hantzsch condensation of aldehydes, 1,3-dicarbonyl compounds, ethyl acetoacetate, and ammonium acetate in the presence of 1,3-disulfonic acid imidazolium hydrogensulfate as an efficient and recyclable ionicliquid under solvent-free conditions. This methodology offers several advantages such as short