El-Hamouly, Wageeh S.; El-Khamry, Abdel-Momen A.; Abbas, Eman M. H., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2006, vol. 45, # 9, p. 2091 - 2098
General solvent-free ionic liquid catalyzed C–N/C–C coupled cyclization to diverse dihydropyrimidinones and new organic materials: Langmuir–Blodgett film study
One-Pot Synthesis of 3,4-Dihydro-2(H)-Pyrimidinones Catalyzed by Reusable Acidic Choline-Based Ionic Liquids
作者:Anlian Zhu、Qianqian Li、Lingjun Li、Jianji Wang
DOI:10.1007/s10562-013-0978-6
日期:2013.5
A series of choline-basedionicliquids (CIL) have been synthesized in this work. The results suggested that both the cations and the anions have significant influences on their properties such as thermostabilities, acidities and their performances for the synthesis of 3,4-dihydro-2(H)-pyrimidinones. The optimized catalytic system based on the CIL [DMEA][HSO4] for the Biginelli reactions benefits from
The Biginelli Reaction with an Imidazolium-Tagged Recyclable Iron Catalyst: Kinetics, Mechanism, and Antitumoral Activity
作者:Luciana M. Ramos、Bruna C. Guido、Catharine C. Nobrega、José R. Corrêa、Rafael G. Silva、Heibbe C. B. de Oliveira、Alexandre F. Gomes、Fábio C. Gozzo、Brenno A. D. Neto
DOI:10.1002/chem.201204314
日期:2013.3.25
The present work describes the synthesis, characterization, and application of a new ion‐tagged iron catalyst. The catalyst was employed in the Biginelli reaction with impressive performance. High yields have been achieved when the reaction was carried out in imidazolium‐based ionicliquids (BMI⋅PF6, BMI⋅NTf2, and BMI⋅BF4), thus showing that the ionic‐liquid effects play a role in the reaction. Moreover
In an attempt to explore novel and more potent antileishmanial compounds to diversify the current inhibitors, we pursued a medicinal chemistry-driven strategy to synthesize novel scaffolds with common pharmacophoric features of dihydropyrimidine and chalcone as current investigational antileishmanial compounds. Based on the reported X-ray structure of Pteridine reductase 1 (PTR1) from Leishmania major
Exploiting silver trifluoromethanesulfonate as efficient and reusable catalyst for the synthesis of dihydropyrimidine derivatives under different reaction environments
Different results were generated under different reaction conditions for the multicomponentreactions. Herein, an efficiently improved and mild protocol for the synthesis of dihydropyrimidine derivatives using cheap silver trifluoromethanesulfonate (CF3SO3Ag) as reusable catalyst is explained. With conventional heating and microwave irradiation method, the synthesis of substituted 3,4‐dihydropyrimidine‐2(1H)‐one
在多组分反应的不同反应条件下产生了不同的结果。本文中,解释了使用廉价的三氟甲磺酸银(CF 3 SO 3 Ag)作为可重复使用的催化剂合成二氢嘧啶衍生物的有效改进的温和方法。与传统的加热和微波照射法,合成取代的3,4-二氢嘧啶-2(ħ) -酮和3,4-二氢嘧啶-2(ħ) -硫酮在不同的溶剂环境中,如乙腈,水实现,并在无溶剂的纯净条件下使用。此外,含有CF 3 SO 3的溶剂(CH 3 CN和H 2 O)从所需产物中分离后,银可重复使用几次,而不会损失很多催化活性。因此,该方法为原始Biginelli反应提供了大大改进和有效的替代途径。
Yttria-Zirconia–Based Lewis Acid Catalysis of the Biginelli Reaction: An Efficient One-Pot Synthesis of 3,4-Dihydropyrimidin-2-(1<i>H</i>)-ones
作者:S. Ramalingam、Pradeep Kumar
DOI:10.1080/00397910802519174
日期:2009.3.10
Abstract Yttria-zirconia–based Lewis acid efficiently catalyzes the three-component cyclocondensation reaction of aldehyde, β-keto ester, and urea or thiourea in refluxing acetonitrile to produce the corresponding dihydropyrimidones in high yields.