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
Synthesis of tetra-substituted pyrroles, a potential phosphodiesterase 4B inhibitor, through nickel(II) chloride hexahydrate catalyzed one-pot four-component reaction
作者:Abu T. Khan、Mohan Lal、Prasanta Ray Bagdi、R. Sidick Basha、Parameswaran Saravanan、Sanjukta Patra
DOI:10.1016/j.tetlet.2012.05.133
日期:2012.8
variety of tetra-substituted pyrrole derivatives were synthesized through one-pot four-component condensation reaction of aromatic aldehydes, benzylamines, β-ketoesters, and nitroalkanes in the presence of 10 mol % NiCl2·6H2O in good yields. Some of them exhibit properties as potential inhibitors of phosphodiesterase 4B (PDE4B) through docking studies.
Iron(III)-Catalyzed Four-Component Coupling Reaction of 1,3-Dicarbonyl Compounds, Amines, Aldehydes, and Nitroalkanes: A Simple and Direct Synthesis of Functionalized Pyrroles
作者:Sukhendu Maiti、Srijit Biswas、Umasish Jana
DOI:10.1021/jo902661y
日期:2010.3.5
A simple, convenient, and multicomponent coupling strategy for the synthesis of highly functionalized pyrroles catalyzed by iron(III) salts has been developed. This strategy demonstrated four-component coupling reactions of 1,3-dicarbonyl compounds, amines, aromatic aldehydes, and nitroalkanes without an inert atmosphere. This methodology provides an alternative approach for easy access of highly substituted
AIMS AND OBJECTIVE Ionic liquids are a suitable medium for stabilization and preparation of catalytic systems. MATERIALS AND METHODS The two-dimensional (2D) ZnO/Fe3O4 nanocomposites were synthesized using ionic liquid [OMIM]Br as a stabilizer and soft template. The nanocomposites were characterized via FTIR, XRD, VSM and SEM analysis. RESULT The catalytic activity of these composites was evaluated
FeCl<sub>3</sub> mediated dimerization of dihydropyrrolo[2,1-<i>a</i>]isoquinolines and chlorination of tetrasubstituted pyrroles
作者:Xue-Fei Jiang、Hao Tan、Hai-Lei Cui
DOI:10.1039/c9ob02607j
日期:——
We have developed a mild and direct dimerization of dihydropyrrolo[2,1-a]isoquinolines through FeCl3-mediated oxidative homocoupling. A series of dimeric dihydropyrroloisoquinoline derivatives were obtained in acceptable to excellent yields (up to >99%). Attempts to expand this dimerization system to the synthesis of dimeric pyrroles failed and chlorination products were obtained in most cases instead