scholarly journals Surface functionality analysis by Boehm titration of graphene nanoplatelets functionalizedviaa solvent-free cycloaddition reaction

2019 ◽  
Vol 1 (4) ◽  
pp. 1432-1441 ◽  
Author(s):  
He Ren ◽  
Eunice Cunha ◽  
Quanji Sun ◽  
Zheling Li ◽  
Ian A. Kinloch ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Cycloaddition Reaction ◽  
Graphene Nanoplatelets ◽  
Solvent Free ◽  
Surface Functionality ◽  
Covalently Bonded ◽  
Boehm Titration

Carboxylic acid-terminated pyrrolidine functionalities were covalently bonded to the surface of graphene nanoplateletsviaa solvent-free approach and characterized by Boehm titration.

Chlorosulfonic Acid Supported Piperidine-4-carboxylic Acid (PPCA) Functionalized Fe3O4 Nanoparticles (Fe3O4-PPCA): The Efficient, Green and Reusable Nanocatalyst for the Synthesis of Pyrazolyl Coumarin Derivatives under Solvent-Free Conditions

2019 ◽  
Vol 22 (2) ◽  
pp. 123-128
Author(s):  
Setareh Habibzadeh ◽  
Hassan Ghasemnejad-Bosra ◽  
Mina Haghdadi ◽  
Soheila Heydari-Parastar
Keyword(s):  
Carboxylic Acid ◽  
Fe3o4 Nanoparticles ◽  
High Efficiency ◽  
Reaction Times ◽  
Chlorosulfonic Acid ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Magnetic Nanocatalyst ◽  
One Pot ◽  
Solvent Free Conditions

Background: In this study, we developed a convenient methodology for the synthesis of coumarin linked to pyrazolines and pyrano [2,3-h] coumarins linked to 3-(1,5-diphenyl-4,5- dihydro-1H-pyrazol-3-yl)-chromen-2-one derivatives using Chlorosulfonic acid supported Piperidine-4-carboxylic acid (PPCA) functionalized Fe3O4 nanoparticles (Fe3O4-PPCA) catalyst. Materials and Methods:: Fe3O4-PPCA was investigated as an efficient and magnetically recoverable Nanocatalyst for the one-pot synthesis of substituted coumarins from the reaction of coumarin with a variety of aromatic aldehydes in high to excellent yield at room temperature under solvent-free conditions. The magnetic nanocatalyst can be easily recovered by applying an external magnet device and reused for at least 10 reaction runs without considerable loss of reactivity. Results and Conclusion: The advantages of this protocol are the use of commercially available materials, simple and an inexpensive procedure, easy separation, and an eco-friendly procedure, and it shows good reaction times, good to high yields, inexpensive and practicability procedure, and high efficiency.

ChemInform Abstract: FeCl3/Pyridine: Dual-Activation in Opening of Epoxide with Carboxylic Acid under Solvent Free Condition.

ChemInform ◽  
2014 ◽  
Vol 45 (7) ◽  
pp. no-no
Author(s):  
Yichao Zhao ◽  
Wen Wang ◽  
Jian Li ◽  
Feng Wang ◽  
Xiufang Zheng ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Solvent Free ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Dual Activation

Solvent-free synthesis of pyrrolo [2,1-α]isoquinolines via one-pot four-component reaction

2021 ◽  
Vol 18 ◽  
Author(s):  
Ali Aminkhani ◽  
Sina Sharifi
Keyword(s):  
Cycloaddition Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Solvent Free Synthesis

: An efficient four-component reaction to synthesize pyrrolo[2,1-a]isoquinolines from malononitrile, aromatic aldehydes, isoquinoline, and cyclohexyl isocyanide under solvent-free conditions is described. In a convenient, simple, and efficient one-pot procedure, the domino Knoevenagel-nucleophilic cycloaddition reaction affords excellent yields of products in less than 1 h.

scholarly journals Development of variously functionalized nitrile oxides

2015 ◽  
Vol 11 ◽  
pp. 1241-1245 ◽  
Author(s):  
Haruyasu Asahara ◽  
Keita Arikiyo ◽  
Nagatoshi Nishiwaki
Keyword(s):  
Carboxylic Acid ◽  
Nucleophilic Substitution ◽  
Functional Groups ◽  
Grignard Reagent ◽  
Cycloaddition Reaction ◽  
Chemical Transformations ◽  
Nitrile Oxides ◽  
Weinreb Amide ◽  
Isoxazole Derivatives ◽  
Acid Esters

N-Methylated amides (N,4-dimethylbenzamide and N-methylcyclohexanecarboxamide) were systematically subjected to chemical transformations, namely, N-tosylation followed by nucleophilic substitution. The amide function was converted to the corresponding carboxylic acid, esters, amides, aldehyde, and ketone upon treatment with hydroxide, alkoxide, amine, diisobutylaluminium hydride and Grignard reagent, respectively. In these transformations, N-methyl-N-tosylcarboxamides behave like a Weinreb amide. Similarly, N-methyl-5-phenylisoxazole-3-carboxamide was converted into 3-functionalized isoxazole derivatives. Since the amide was prepared by the cycloaddition reaction of ethynylbenzene and N-methylcarbamoylnitrile oxide, the nitrile oxide served as the equivalent of the nitrile oxides bearing a variety of functional groups such as carboxy, alkoxycarbonyl, carbamoyl, acyl and formyl moieties.

scholarly journals Preparation and Identification of Novel 1, 3-Oxazepine Derivatives by Cycloaddition Reactions [2+5] of Selected Carboxylic Acid Anhydrides with Imines Derived from 4-methyl aniline

2018 ◽  
Vol 29 (2) ◽  
pp. 93 ◽  
Author(s):  
Obaid H. Abid ◽  
Ahmed Khames Ramadan
Keyword(s):  
Carboxylic Acid ◽  
Physical Properties ◽  
Spectral Data ◽  
1H Nmr ◽  
Cycloaddition Reaction ◽  
Absolute Ethanol ◽  
Cycloaddition Reactions ◽  
Thermal Condensation ◽  
Ft Ir ◽  
Acid Anhydrides

Novel 1,3-oxazepine derivatives have been synthesis via (2+5) cycloaddition reaction of imines and selected cyclic carboxylic acid anhydrides by refluxing in dry benzene. Imines have been prepared by thermal condensation of 4-methyl aniline and para substituted benzaldehyde in absolute ethanol under reflux conditions. The structure of the target compounds were Identified by some physical properties and spectral data of FT-IR and 1H-NMR.

Substitution of Cyano Group in Position 5 of 1,2,4-Triazines by Carboxylic Acid Hydrazide Residues under Solvent-Free Conditions

2018 ◽  
Vol 54 (3) ◽  
pp. 509-511 ◽  
Author(s):  
D. S. Kopchuk ◽  
A. P. Krinochkin ◽  
E. S. Starnovskaya ◽  
Ya. K. Shtaitz ◽  
I. S. Kovalev ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Cyano Group ◽  
Acid Hydrazide ◽  
Solvent Free ◽  
Carboxylic Acid Hydrazide ◽  
Solvent Free Conditions
Sign in / Sign up

Export Citation Format

Share Document