A solvent-free protocol for the green synthesis of

A solvent-free protocol for the green synthesis of

Atom-Efficient Solvent-Free Green Synthesis of Chalcones by and aromatic aldehydes can be achieved by grinding at room temperature in the Keywords Chalcones ClaisenSchmidt condensation green chemistry grinding Several methods have been developed for the preparation of chalcone

Atom-Efficient Solvent-Free Green Synthesis of Chalcones

Atom-Efficient Solvent-Free Green Synthesis of Chalcones

Abstract An improved green Knoevenagel condensation of various aromatic aldehydes with 4-thiazolidinones in the presence of anhydrous ammonium acetate can be achieved by grinding at room temperature in the absence of solvents This process is simple efficient economical and environmentally benign compared to classical reactions

A simplified green chemistry approach to the Biginelli

A simplified green chemistry approach to the Biginelli

An efficient grinding protocol for the synthesis of dihydropyrano 2 3-c pyrazole derivatives from acetylene ester hydrazine hydrate aryl aldehydes and malononitrile under solvent free conditions has been achieved with excellent yields The structures of the synthesized compounds were deduced by spectroscopic techniques and the compounds were further evaluated for their in vitro antioxidant

Green synthesis and antimicrobial evaluation of some new

Green synthesis and antimicrobial evaluation of some new

and their derivatives relate to the green approach i e reactions using microwave irradiation sonication grinding techniques solvent-free conditions nanoparticles ionic liquids etc are presented in this review The reagents used for the synthesis are ferric chloride cesium carbonates

 PDF Green approach for synthesis of nano catalyst and

PDF Green approach for synthesis of nano catalyst and

Green chemistry also called sustainable chemistry is an area of chemistry and chemical engineering focused on the designing of products and processes that minimize the use and generation of hazardous substances While environmental chemistry focuses on the effects of polluting chemicals on nature green chemistry focuses on the environmental impact of chemistry including technological

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

A green and simple synthesis of N-alkyl-2 CH2Ph 4 by reaction with thiourea by physical grinding or by using green solvents like ethanol PEG-600 etc or by using micro-wave irradiation technique Keywords Green synthesis grinding microwave N-alkyl-2-chlorobenzimidazole benzimidazole N-alkyl-2-mercapto

Green Synthesis of Nanomaterials A Necessity for

Green Synthesis of Nanomaterials A Necessity for

Green synthesis and antimicrobial evaluation of some new trifluoromethyl-substituted hexahydropyrimidines by grinding Grinding the mixture for about 3 5 min led to a yellow colored semi-solid mass which solidified in 4 6 min Grinding continued for another 5 10 min

Research Article ISSN 0975-7384 CODEN USA JCPRC5

Research Article ISSN 0975-7384 CODEN USA JCPRC5

PDF A green synthesis of hydrotalcite double layered catalyst by grinding method using Al Mg molar ratios of 1 0-3 0 at room temperature is described Prepared double layered catalyst

A simple and green procedure for the synthesis of 5

A simple and green procedure for the synthesis of 5

Nov 01 2011· Read Green synthesis and antimicrobial evaluation of some new trifluoromethyl-substituted hexahydropyrimidines by grinding European Journal of Medicinal Chemistry on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

Keywords grinding aldehyde ketone chalcone green synthesis INTRODUCTION The term Green chemistry means the design and development of chemical process to reduce or eliminate the use and generation of chemicals hazardous to the environment Solvents used …

grinding method in green chemistry - africar-hire co za

grinding method in green chemistry - africar-hire co za

A simplified green chemistry approach to the Biginelli reaction using Grindstone Chemistry Ajay K Bose a Suhas Pednekar a Subhendu N Ganguly a Goutam Chakrabortyb and Maghar S Manhasa aGeorge Barasch Bioorganic Research Laboratory Department of Chemistry and Chemical Biology Stevens Institute of Technology Hoboken NJ 07030 USA

Ambient stable naphthalenediimide radical ions synthesis

Ambient stable naphthalenediimide radical ions synthesis

Oct 07 2014· A convenient environmentally friendly and mild green synthesis of imidazolidine-2-thiones hy-dantoin and thiohydantoin derivatives was developed by the one-pot reaction of benzils urea or thiourea derivatives and strong base at with grinding The key advantages are the short reaction times excellent yields simple workup and easy purification in the solvent-free condition

Radical ion synthesis finally embraces green chemistry

Radical ion synthesis finally embraces green chemistry

Solvent-Free Aldol Condensation Reactions Synthesis of Chalcone Derivatives problem solving and highlights green chemistry principles as the synthesis minimizes waste production no reaction solvent and proceeds with high atom economy carrying out the grinding technique The results can be found in Scheme SM 4 2 2 1 1

Mechanochemical Ring‐Opening Polymerization of Lactide

Mechanochemical Ring‐Opening Polymerization of Lactide

A convenient environmentally friendly and mild green synthesis of imidazolidine-thiones h-2 y-dantoin and thiohydantoin derivatives was developed by the one-pot reaction of benzils urea or thiourea derivatives and strong base at with grinding The key advantages are the short reaction Synthesis of 3a-c and 4a-y by grinding

A Green Synthesis of Chalcones As an Antioxidant and

A Green Synthesis of Chalcones As an Antioxidant and

Mechanochemical Ring-Opening Polymerization of Lactide Liquid-Assisted Grinding for the Green Synthesis of Poly lactic acid with High Molecular Weight Authors Nuri Ohn and liquid-assisted grinding Liquid-assisted grinding was found to be an especially important factor for achieving a high degree of mechanochemical polymerization

Green synthesis and antimicrobial evaluation of some new

Green synthesis and antimicrobial evaluation of some new

Ecofriendly grinding synthesis of a doublelayered nanomaterial Ecofriendly grinding synthesis of a doublelayered nanomaterial and the correlation between its basicity calcination and alytic activity in the green synthesis of novel fused pyrimidines Pramod K Sahu a Author affiliations

A green and efficient protocol for the synthesis of

A green and efficient protocol for the synthesis of

A novel efficient method for the synthesis of 4-amino-5- substituted-1 2 4- triazole -3-thione was developed in which substituted aromatic aliphatic acids with symmetrical dithiocarbohydrazones were used as starting materials and phosphorus pentachloride was used as catalyst The structures of these products were confirmed by melting point determination IR 1H NMR and elemental analysis

green synthesis grinding - supremewheels co za

green synthesis grinding - supremewheels co za

Jun 11 2016· Eco-Friendly Synthesis of Quinoxaline Derivatives by Grinding Under Solvent-Free Conditions Jun Li a Dan-Na Jiang a Jiu-Xi Chen a Miao-Chang Liu a Jin-Chang Ding a b and

Mechanically Induced Solid-State Generation of Phosphorus

Mechanically Induced Solid-State Generation of Phosphorus

An improved green Knoevenagel condensation ofvarious aromatic aldehydes with 4-thiazolidinones in the presence ofanhydrous ammonium acetate can be achieved by grinding at room temperature in the absence of solvents This process is simple efficient economical and environmentally benign compared to classical reactions

Azo Dyes Preparation Via Environmentally Benign Way

Azo Dyes Preparation Via Environmentally Benign Way

Jun 14 2017· Mechanochemical Ring‐Opening Polymerization of Lactide Liquid‐Assisted Grinding for the Green Synthesis of Poly lactic acid with High Molecular Weight Nuri Ohn Department of Chemistry and Institute of Physical Science Chonbuk National University Jeon-Ju Jeollabuk-do 54869 Korea

Solvent-Free Aldol Condensation Reactions Synthesis of

Solvent-Free Aldol Condensation Reactions Synthesis of

Green Synthesis of Nanomaterials A Necessity for Sustainability ball milling or planetary grinding Gas phase synthesis These include plasma vaporization chemical vapor synthesis and laser ablation Wet chemistry Karn B Wong S S Green Chemistry 2011 13 3 482-519

grinding method in green chemistry - africar-hire co za

grinding method in green chemistry - africar-hire co za

A convenient environmentally friendly and mild green synthesis of imidazolidine-2-thiones hydantoin and thiohydantoin derivatives was developed by the one-pot reaction of benzils urea or thiourea derivatives and strong base at with grinding The key ad

Eco-Friendly Synthesis of Pyrazoline Derivatives

Eco-Friendly Synthesis of Pyrazoline Derivatives

Moreover the green organic synthesis via grinding at room temperature represents a benign way towards the green and sustainable context of Chemistry 35-37 In this work we report a new and environmentally benign synthesis of azo dyes via grinding under solvent free condition at …

A facile and green three-component synthesis of 2-amino-3

A facile and green three-component synthesis of 2-amino-3

This paper reports for the first time the green synthesis of the polymorphs I and II of new pharmaceutical co-crystals lamivudine theophylline in solid-phase through the mixture between lamivudine and theophylline both active pharmaceutical ingredients-APIs in the proportion of 1 1 by neat grinding and liquid assisted grinding 10 μL ethanol

Solvent-free green and efficient synthesis - SpringerLink

Solvent-free green and efficient synthesis - SpringerLink

Research Article ISSN 0975-7384 CODEN USA JCPRC5 1167 Green Synthesis 1D and 2D NMR spectral characterization of imidazole fused with pyrimidine nucleus by using grinding techniques The grinding was continued for 15-20 minutes and the progress of reaction was monitored

Solvent-Free Green Synthesis of 4-amino-5-substituted-1 2

Solvent-Free Green Synthesis of 4-amino-5-substituted-1 2

A facile and green three-component synthesis of 2-amino-3-cyano-7-hydroxy-4H-chromenes on grinding Sh Javanshir M Safari and M G Dekamin Department of Chemistry Iran University of Science and Technology Tehran P O Box 16846-13114 Iran

Mechanochemical Ring-Opening Polymerization of Lactide

Mechanochemical Ring-Opening Polymerization of Lactide

Mar 26 2013· Abstract A facile green and efficient method has been developed for the synthesis of pyrano 4 3-b pyrans via a one-pot reaction of aromatic aldehydes malononitrile and 4-hydroxy-6-methyl-pyran-2-one in the presence of ammonium acetate under solvent-free conditions using grinding method The experimental simplicity short reaction time easy work-up avoidance of organic solvents …

Bioactive Thiazine and Benzothiazine Derivatives Green

Bioactive Thiazine and Benzothiazine Derivatives Green

Mechanically Induced Solid-State Generation of Phosphorus Ylides and the Solvent-Free Wittig Reaction Solvent-Free Wittig Reaction A Green Organic Chemistry Laboratory Experiment protic ionic liquid-substrate tuned green synthesis of 1 2-disubstituted and 2-substituted benzimidazoles with outstanding selectivity

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

Green Organocatalytic Oxidation of Sulfides to Sulfoxides and Sulfones E Voutyritsa I Triandafillidi C G Kokotos Synthesis 2017 49 917-924 A 2 2 2-trifluoroacetophenone-catalyzed oxidation of allyloximes enables a green and efficient synthesis of isoxazolines utilizing H 2 O 2 as the oxidant A variety of substitution patterns both

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

One-Pot Synthesis of Imidazolidine-2-Thiones Hydantoins

Oct 07 2014· A convenient environmentally friendly and mild green synthesis of imidazolidine-2-thiones hy-dantoin and thiohydantoin derivatives was developed by the one-pot reaction of benzils urea or thiourea derivatives and strong base at with grinding The key advantages are the short reaction times excellent yields simple workup and easy purification in the solvent-free condition