Zirconocene dichloride catalysed one-pot synthesis of pyrroles through nitroalkene-enamine assembly
作者:Sandeep Goyal、Jatinkumar K. Patel、Mukesh Gangar、Kapil Kumar、Vipin A. Nair
DOI:10.1039/c4ra09873k
日期:——
Zirconocene dichloride was found to be a highly efficient catalyst for the synthesis of multi-substituted pyrroles by a three-component, one-pot reaction.
A series of polysubstituted pyrroles were rapidly synthesized in moderate to good yields via catalyst-free one-pot three-component reaction of 1,3-dicarbonyl compounds with primary amines and nitrostyrenes by using liquid-assisted grinding. This protocol provides several advantages over the conventional chemical synthesis, such as simple work-up procedure, wide substrate scope, short reaction time
采用液体辅助研磨,1,3-二羰基化合物与伯胺和硝基苯乙烯的无催化剂一锅三组分反应快速合成了一系列多取代吡咯,收率适中。该协议比传统的化学合成具有几个优点,例如简单的后处理程序、广泛的底物范围、短的反应时间和环境友好性。通过1 H NMR、13 C NMR 和 ESI-MS 研究证实了多取代吡咯的结构。
β-Cyclodextrin as a recyclable catalyst: aqueous phase one-pot four-component synthesis of polyfunctionalized pyrroles
作者:Karnakar Konkala、Rakhi Chowrasia、Padma S. Manjari、Nelson L. C. Domingues、Ramesh Katla
DOI:10.1039/c6ra08335h
日期:——
straightforward methodology was explored for the first time towards the synthesis of polyfunctionalized pyrroles using β-cyclodextrin as a reusable supramolecular catalyst in aqueous medium. The present method provides various diversely substituted pyrroles from the commercially available synthons in good to excellent yields. The advantages of this novel protocol are use of environmentally benign reaction medium
Efficient and recoverable novel pyranothiazol Pd (II), Cu (II) and Fe(III) catalysts in simple synthesis of polyfunctionalized pyrroles: Under mild conditions using ultrasonic irradiation
作者:Mahmoud Abd El Aleem Ali Ali El‐Remaily、Nashwa M. El‐Metwaly、Tahani M. Bawazeer、Mohamed E. Khalifa、Tarek El‐Dabea、Ahmed M. Abu‐Dief
DOI:10.1002/aoc.6370
日期:2021.11
synthesize polyfunctionalized pyrrole derivatives using ultrasonic irradiation in a one-pot reaction. The catalyst was selected for this application based on the history of Pd (II) complexes and the properties expected theoretically. A condensation reaction for aromatic aldehyde, aromatic amine, acetylacetone, and nitromethane was carried out under mild reaction conditions by ultrasonic irradiation. All
通过双齿螯合模式从噻唑配体制备了三种新型 Pd (II)、Cu (II) 和 Fe (III) 配合物。应用替代光谱和分析工具来阐明它们的结构和分子式。该研究扩展到使用标准方法研究溶液中配合物的稳定性和化学计量。此外,Material Studio Package 通过密度泛函理论 (DFT) 方法获得了结构形式内的最佳原子分布。这项计算研究为我们提供了显着的物理特性以进行区分。此外,使用 Crystal explorer 程序研究了填充系统中的晶体表面特性,以评估表面之间的接触程度。计算数据通过一些物理特征区分 Pd (II)-噻唑 (HYHPd) 配合物,这在催化领域可能是有前途的。选择该配合物以在一锅反应中使用超声波辐射来发挥催化作用来合成多官能化吡咯衍生物。基于 Pd (II) 配合物的历史和理论上预期的性能,为此应用选择了催化剂。芳香醛、芳香胺、乙酰丙酮和硝基甲烷的缩合反应是在温