Direct synthesis of 5-methyl-3-aryl-1,2,4-oxadiazoles from aryl aldehydes, nitroethane, and ammonium acetate

1985 ◽  
Vol 50 (8) ◽  
pp. 1182-1186 ◽  
Author(s):  
Thomas E. Young ◽  
William Thomas Beidler
Keyword(s):  
Ammonium Acetate ◽  
Direct Synthesis ◽  
Aryl Aldehydes

Solvent-free, one-pot synthesis of 2,4,6-triarylpyridines using trichloroisocyanuric acid or N-bromosuccinimide as a novel and neutral catalyst

2011 ◽  
Vol 76 (11) ◽  
pp. 1307-1315 ◽  
Author(s):  
Behrooz Maleki ◽  
Hafezeh Salehabadi ◽  
Zeinalabedin Sepehr ◽  
Mina Kermanian
Keyword(s):  
Ammonium Acetate ◽  
Solvent Free ◽  
One Pot ◽  
Aryl Aldehydes ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Trichloroisocyanuric Acid

A simple and benign protocol has been explored for the preparation of 2,4,6-triarylpyridines by a one-pot reaction between aryl aldehydes, enolizable ketones and ammonium acetate in the presence of N-bromosuccinimide or trichloroisocyanuric acid as green and neutral catalysts. The reactions proceed smoothly at 130 °C under solvent-free conditions to provide 2,4,6-triarylpyridines in good yields.

Fe3O4@chitosan nanoparticles: a valuable heterogeneous nanocatalyst for the synthesis of 2,4,5-trisubstituted imidazoles

RSC Advances ◽  
2014 ◽  
Vol 4 (40) ◽  
pp. 20932-20939 ◽  
Author(s):  
Zohre Zarnegar ◽  
Javad Safari
Keyword(s):  
Aqueous Solution ◽  
Catalytic Activity ◽  
Ammonium Acetate ◽  
Chitosan Nanoparticles ◽  
One Pot ◽  
Heterogeneous Nanocatalyst ◽  
Aryl Aldehydes ◽  
One Pot Condensation ◽  
Co Precipitation

Chitosan-coated Fe3O4 nanoparticles (Fe3O4@CS) were prepared simply through in situ co-precipitation of Fe2+ and Fe3+ ions via NH4OH in an aqueous solution of chitosan and their catalytic activity was investigated in the synthesis of 2,4,5-trisubstituted imidazoles by a one-pot condensation of benzil derivatives, aryl aldehydes and ammonium acetate in EtOH.

scholarly journals ZnO Nanoparticles: An Efficient Reagent, Simple and One-Pot Procedure for Synthesis of Highly Functionalized Dihydropyridine Derivatives

2012 ◽  
Vol 9 (2) ◽  
pp. 615-620 ◽  
Author(s):  
Marziyeh Khazaei ◽  
Mohammad Anary-Abbasinejad ◽  
Alireza Hassanabadi ◽  
Bahareh Sadeghi
Keyword(s):  
Zno Nanoparticles ◽  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
One Pot ◽  
Nano Zno ◽  
Aryl Aldehydes ◽  
One Pot Synthesis ◽  
Dihydropyridine Derivatives ◽  
Efficient Reagent

A new and efficient one-pot synthesis of dihydropyridones derivatives by four-component reaction between cyanoacetamide, aryl aldehydes, and ethyl acetoacetate with ammonium acetate using nano ZnO is described. The reaction was performed in ethanol under reflux conditions and afforded good yields of products.

scholarly journals A practical iodine-catalyzed oxidative conversion of aldehydes to nitriles

RSC Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 1484-1489 ◽  
Author(s):  
Chaojie Fang ◽  
Meichao Li ◽  
Xinquan Hu ◽  
Weimin Mo ◽  
Baoxiang Hu ◽  
...  
Keyword(s):  
Nitrogen Source ◽  
Efficient Method ◽  
Ammonium Acetate ◽  
Direct Synthesis ◽  
Oxidative Conversion ◽  
Butyl Hydroperoxide

A simple and efficient method for the direct synthesis of nitriles from aldehydes using ammonium acetate as the nitrogen source, iodine as the catalyst, and tert-butyl hydroperoxide (TBHP) as the oxidant was developed.

scholarly journals An Efficient One-Pot Synthesis of 1,8-Dioxodecahydroacridines Using Silica-Supported Polyphosphoric Acid (PPA-SiO2) under Solvent-Free Conditions

2012 ◽  
Vol 9 (2) ◽  
pp. 504-509 ◽  
Author(s):  
Farid Moeinpour ◽  
Amir Khojastehnezhad
Keyword(s):  
Polyphosphoric Acid ◽  
Ammonium Acetate ◽  
Significant Loss ◽  
One Pot ◽  
Efficient Catalyst ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions ◽  
Short Period ◽  
Simple Filtration ◽  
High Yields

Silica gel–supported polyphosphoric acid (PPA-SiO2) was found to be an efficient catalyst for the synthesis of 1,8-dioxodecahydroacridines via one-pot three-component condensation of aryl aldehydes, dimedone, and ammonium acetate or 4-methyl aniline in high yields, easy workup procedure and short period of times. The catalyst was separated by simple filtration and used in the reaction three times without any significant loss of its activity.

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