scholarly journals One-pot synthesis at room temperature of epoxides and linalool derivative pyrans in monolacunary Na7PW11O39-catalyzed oxidation reactions by hydrogen peroxide

RSC Advances ◽  
2020 ◽  
Vol 10 (13) ◽  
pp. 7691-7697 ◽  
Author(s):  
Castelo B. Vilanculo ◽  
Márcio J. Da Silva ◽  
Milena Galdino Teixeira ◽  
Jesus Avendano Villarreal
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Oxidation Reactions ◽  
One Pot ◽  
Synthesis Route ◽  
One Pot Synthesis ◽  
Catalyzed Oxidation

In this work, the catalyst Na7PW11O39 was used in a new one-pot synthesis route to oxidize linalool to valuable derivatives (i.e., vinyltetrahydrofuran, vinyltetrahydropyran, and diepoxide), using a green oxidant (H2O2) at room temperature.

Metal nitrate-catalyzed one-pot oxidative esterification of benzaldehyde with hydrogen peroxide in alcoholic solutions at room temperature

2021 ◽  
Vol 45 (7) ◽  
pp. 3683-3691
Author(s):  
Márcio José da Silva ◽  
Cesar Macedo de Oliveira
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Metal Nitrate ◽  
Ferric Nitrate ◽  
Alkyl Esters ◽  
One Pot ◽  
Oxidative Esterification ◽  
One Pot Synthesis ◽  
The One

The ferric nitrate was the most active and selective metal nitrate catalyst in the one-pot synthesis of alkyl esters from benzaldehyde with hydrogen peroxide at room temperature.

One-pot Synthesis of Pyrazolone Sulfones by Iodine-catalyzed Sulfenylation of Pyrazolones with Aryl Sulfonyl Hydrazides Followed by Oxidation in Water

2018 ◽  
Vol 15 (3) ◽  
pp. 380-387
Author(s):  
Xia Zhao ◽  
Xiaoyu Lu ◽  
Lipeng Zhang ◽  
Tianjiao Li ◽  
Kui Lu
Keyword(s):  
Double Bond ◽  
Efficient Method ◽  
Room Temperature ◽  
Sulfonyl Chloride ◽  
Antibacterial Activities ◽  
Oxidation Reactions ◽  
Reaction Conditions ◽  
One Pot ◽  
X Ray ◽  
Amide Form

Aim and Objective: Pyrazolone sulfones have been reported to exhibit herbicidal and antibacterial activities. In spite of their good bioactivities, only a few methods have been developed to prepare pyrazolone sulfones. However, the substrate scope of these methods is limited. Moreover, the direct sulfonylation of pyrazolone by aryl sulfonyl chloride failed to give pyrazolone sulfones. Thus, developing a more efficient method to synthesize pyrazolone sulfones is very important. Materials and Method: Pyrazolone, aryl sulphonyl hydrazide, iodine, p-toluenesulphonic acid and water were mixed in a sealed tube, which was heated to 100°C for 12 hours. The mixture was cooled to 0°C and m-CPBA was added in batches. The mixture was allowed to stir for 30 min at room temperature. The crude product was purified by silica gel column chromatography to afford sulfuryl pyrazolone. Results: In all cases, the sulfenylation products were formed smoothly under the optimized reaction conditions, and were then oxidized to the corresponding sulfones in good yields by 3-chloroperoxybenzoic acid (m-CPBA) in water. Single crystal X-ray analysis of pyrazolone sulfone 4aa showed that the major tautomer of pyrazolone sulfones was the amide form instead of the enol form observed for pyrazolone thioethers. Moreover, the C=N double bond isomerized to form an α,β-unsaturated C=C double bond. Conclusion: An efficient method to synthesize pyrazolone thioethers by iodine-catalyzed sulfenylation of pyrazolones with aryl sulfonyl hydrazides in water was developed. Moreover, this method was employed to synthesize pyrazolone sulfones in one-pot by subsequent sulfenylation and oxidation reactions.

scholarly journals A Facile Synthesis of Polysubstituted Pyrroles by One-Pot Three-Component Reaction

2012 ◽  
Vol 9 (4) ◽  
pp. 2239-2244 ◽  
Author(s):  
Hossein Anaraki-Ardakani ◽  
Maziar Noei ◽  
Mina Karbalaei-Harofteh ◽  
Shahab Zomorodbakhsh
Keyword(s):  
Room Temperature ◽  
Facile Synthesis ◽  
One Pot ◽  
Pyrrole Derivatives ◽  
Dialkyl Acetylenedicarboxylates ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
High Yields ◽  
Neutral Conditions

A new and efficient one-pot synthesis of polysubstituted pyrrole derivatives by three-component reaction between dialkyl acetylenedicarboxylates, triphenylphosphine, 2-aminopyridin derivatives in the presence of arylglyoxals is described. The reactions were performed in dichloromethane at room temperature and neutral conditions and afforded high yields of products.

One-pot synthesis of chitosan–dehydropregnenolone acetate ketimine nanoparticles and their antifungal bioevaluation

RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 10065-10071 ◽  
Author(s):  
Archana M. Das ◽  
Raju Khan ◽  
Manash P. Hazarika ◽  
Debjani Baruah ◽  
Purnajyoti D. Bhuyan
Keyword(s):  
Room Temperature ◽  
Polymeric Nanoparticles ◽  
Communicable Diseases ◽  
New Method ◽  
One Pot ◽  
One Pot Synthesis ◽  
Dehydropregnenolone Acetate

This paper presents a new method for fabricating biodegradable bio-polymeric nanoparticles via a convenient one-pot strategy at room temperature under stirring conditions for application to communicable diseases.

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