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Onion (Allium cepa L.) Extract: A Green and Eco-friendly Catalyst for MW-Assisted Solvent-Free Synthesis of Pyrroles via Paal–Knorr Reaction
AbstractAn environmentally friendly and highly efficient method for onion extract-catalyzed microwave-assisted solvent- free synthesis of pyrroles...
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Ascorbic acid as a multifunctional hydrogen bonding catalyst for Paal–Knorr synthesis of N-substituted mono- and bis-pyrroles: experimental and theoretical aspects
Ascorbic acid could be applied as a recyclable organocatalyst for the preparation of pyrroles via Paal–Knorr condensation of hexane-2,5-dione with...
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Preparation, Characterization of Sulfonyl Tetrazoles/ HY Zeolite Hybrids as a Catalyst in the Synthesis of Pyrrole via Paal-Knorr Reaction
Nowadays, heterogeneous ionic liquid catalysts are used for control of environmental pollution. Because, the heterogeneous catalysts are easily...
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Crystalline salicylic acid as an efficient catalyst for ultrafast Paal–Knorr pyrrole synthesis under microwave induction
AbstractIn this study, the viability of a wide range of crystalline aromatic and aliphatic carboxylic acids as organocatalysts has been investigated...
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Amidosulfonic acid supported on graphitic carbon nitride: novel and straightforward catalyst for Paal–Knorr pyrrole reaction under mild conditions
A novel heterogeneous acidic catalyst was prepared by in situ immobilization of amidosulfonic acid (NH 2 SO 3 H) on graphitic carbon nitride (g-C 3 N 4 )...
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Naturally occurring organic acids for organocatalytic synthesis of pyrroles via Paal–Knorr reaction
AbstractIn this study, common naturally occurring organic acids, namely oxalic, malonic, succinic, tartaric and citric acid (as safe, inexpensive,...
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Synthesis of Polyketone Anion Ion Exchange Fibers by Paal-Knorr Reaction and Its Physico-Chemical Properties
In this study, polyketone anion exchange fibers were synthesized by the amination of polyketone via a Paal-Knorr reaction and a quaternization...
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Paal–Knorr Pyrrole Synthesis
Reaction between 1,4-diketones and primary amines (or ammonia) to give pyrroles. A variation of the Knorr pyrazole synthesis.
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Knorr Pyrazole Synthesis
Also known as Knorr reaction. Reaction of hydrazine or substituted hydrazine with 1,3-dicarbonyl compounds to provide the pyrazole or pyrazolone ring...
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Recent advances in the construction of axially chiral arylpyrroles
Catalytic enantioselective preparation of axially chiral molecules has gained considerable interest over the past decades, due to their numerous...
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An efficient synthesis of polyfunctionalized pyrroles by three-component reaction of arylglyoxals, Meldrum’s acid and ethyl 2-chloro-3-(arylamino)but-2-enoates
A fast and convenient method for synthesis of some new functionalized pyrrole derivatives have been described via a three-component reaction between...
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Multicomponent synthesis of 1,5,6,7-tetrahydro-4H-indol-4-one derivatives
The data on multicomponent methods of tetrahydro-4 H -indol-4-one synthesis published over the past ten years are summarized in this review. Three main...
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Functional of Multi-walled Carbon Nanotubes on ZSM-5 Zeolite a New Nano Catalyst for Organic Reaction
Multi-walled carbon nanotubes (MWNTs) were modified with carboxylic acid functional groups (MWCNTs-(COOH) n), and in the next step ZSM-5 type zeolite...
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A facile and efficient synthesis of highly functionalized pyrroles via a four-component one-pot reaction in the presence of Ni(II) Schiff base/SBA-15 heterogeneous catalyst
AbstractIn this study, the Ni(II) Schiff base/SBA-15 catalyst was successfully synthesized and characterized by employing FT-IR, XRD, TGA, EDX,...
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Dialkyl (2-oxopropyl)phosphonates in the synthesis of phosphorylated heterocycles
This minireview summarizes data on the use of dialkyl (2-oxopropyl)phosphonates in the synthesis of phosphorylated heterocycles. Convenient methods...
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Synthesis of Heterocycles via Microwave-Assisted Cycloadditions and Cyclocondensations
Controlled microwave heating has found many important applications in the synthesis of heterocycles. Almost all kinds of heterocycles have been...
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Meisenheimer Complex
Also known as Knorr reaction. Reaction of hydrazine or substituted hydrazine with 1,3-dicarbonyl compounds to provide the pyrazole or pyrazolone ring...
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Strategies for sustainable organic synthesis
Organic Synthesis is a branch of chemical synthesis which concerns with preparation of new organic molecules through organic reactions. These...
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Phosphorus Pentasulfide in Heterocycle Synthesis
The presence of heterocyclic compounds in all types of organic molecules of interest in pharmacology, biology, electronics, optics, material...
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Nitroquinolines in the Synthesis of Heterocyclic Compounds (microreview)
This microreview presents data on the synthesis of polynuclear heterocyclic compounds based on quinoline nitro derivatives published over the past 10...
