scholarly journals Solvent-free synthesis of novel para-menthane-3,8-diol ester derivatives from citronellal using a polymer-supported scandium triflate catalyst

2016 ◽  
Vol 12 ◽  
pp. 2046-2054 ◽  
Author(s):  
Lubabalo Mafu ◽  
Ben Zeelie ◽  
Paul Watts
Keyword(s):  
Natural Resources ◽  
Simple Procedure ◽  
Solvent Free ◽  
Added Value ◽  
Reaction Conditions ◽  
Polymer Supported ◽  
Acid Anhydrides ◽  
Aqueous Conditions ◽  
Hydroxy Groups ◽  
Solvent Free Synthesis

The use of natural resources as a chemical feedstock for the synthesis of added-value products is gaining interest; as such we report an environmentally friendly method for the synthesis of para-menthane-3,8-diol from natural citronellal oil in 96% yield, under solvent free aqueous conditions. The acylation of para-menthane-3,8-diol with various acid anhydrides over polymer-supported scandium triflate (PS-Sc(OTf)3) catalyst was subsequently developed, where both hydroxy groups of para-menthane-3,8-diol could be simultaneous acylated under mild reaction conditions to form the corresponding diesters in good yields. The advantages of this method include a simple procedure from natural resources, using solvent-free reaction conditions.

Effect of anion type of imidazolium based polymer supported ionic liquids on the solvent free synthesis of cycloaddition of CO2 into epoxide

2016 ◽  
Vol 265 ◽  
pp. 56-67 ◽  
Author(s):  
Arvind H. Jadhav ◽  
Gaurav M. Thorat ◽  
Kyuyoung Lee ◽  
Alan Christian Lim ◽  
Hyo Kang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Solvent Free ◽  
Polymer Supported ◽  
Supported Ionic Liquids ◽  
Solvent Free Synthesis ◽  
Anion Type

Biocatalytic and solvent-free synthesis of a bio-based biscyclocarbonate

2018 ◽  
Vol 20 (20) ◽  
pp. 4738-4745 ◽  
Author(s):  
D. S. Wunschik ◽  
K. N. Ingenbosch ◽  
M. Zähres ◽  
J. Horst ◽  
C. Mayer ◽  
...  
Keyword(s):  
Solvent Free ◽  
Reaction Conditions ◽  
Sustainable Resources ◽  
One Step ◽  
Solvent Free Synthesis

An enzymatically controlled one-step synthesis of a non-isocyanate polyurethane monomer from sustainable resources is feasible under mild reaction conditions.

scholarly journals A Facile One-Pot Solvent-Free Synthesis of 1,2-Dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones Catalyzed by Wet Cyanuric Chloride

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Firouzeh Nemati ◽  
Azam Beyzai
Keyword(s):  
Organic Solvent ◽  
Simple Procedure ◽  
Reaction Times ◽  
Solvent Free ◽  
Cyanuric Chloride ◽  
One Pot ◽  
Free Condition ◽  
Solvent Free Condition ◽  
High Yields ◽  
Solvent Free Synthesis

A novel one-pot synthesis of 1,2-dihydro-1-arylnaphtho[1,2-e][1,3]oxazine-3-ones by condensation of a variety of aldehydes withβ-naphthol and urea or thiourea in the presence of wet cyanuric chloride under solvent-free condition has been described. High yields, simple procedure, easy workup, short reaction times, and avoiding the use of organic solvent are the advantages of this green methodology.

scholarly journals Solvent-free synthesis of enantioenriched β-silyl nitroalkanes under organocatalytic conditions

2021 ◽  
Vol 17 ◽  
pp. 2642-2649
Author(s):  
Akhil K Dubey ◽  
Raghunath Chowdhury
Keyword(s):  
Temperature Control ◽  
Carbonyl Compounds ◽  
Room Temperature ◽  
Conjugate Addition ◽  
High Reactivity ◽  
Solvent Free ◽  
Reaction Conditions ◽  
Silyl Group ◽  
Solvent Free Conditions ◽  
Solvent Free Synthesis

An enantioselective 1,4-conjugate addition of nitromethane to β-silyl α,β-unsaturated carbonyl compounds catalyzed by bifunctional squaramide catalysts has been developed. This methodology offers both enantiomers of β-silyl nitroalkanes in good to excellent yields (up to 92%) and enantioselectivities (up to 97.5% ee) under solvent-free conditions at room temperature. Control experiments reveal that the presence of a β-silyl group in the enones is crucial for high reactivity under the optimized reaction conditions.

Copper(ii) incorporated functionalized polystyrene catalyzed N-arylation of amides under solvent free condition with broad substrate scope

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 109692-109701 ◽  
Author(s):  
Md. Mominul Islam ◽  
Mita Halder ◽  
Anupam Singha Roy ◽  
Sauvik Chatterjee ◽  
Asim Bhaumik ◽  
...  
Keyword(s):  
Solvent Free ◽  
Aryl Halides ◽  
Reaction Conditions ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Polymer Supported

A new polymer supported Cu(ii) catalyst has been reported for N-arylation of various amides with aryl halides under neat reaction conditions.

Solvent-free synthesis of 6-unsubstituted dihydropyrimidinones using 2-pyrrolidonium bisulphate as efficient catalyst

2016 ◽  
Vol 70 (8) ◽  
Author(s):  
Heshmatollah Alinezhad ◽  
Mahmood Tajbakhsh ◽  
Mahboobeh Zare ◽  
Mahbooeh Mousavi
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Organic Solvents ◽  
Simple Procedure ◽  
Solvent Free ◽  
One Pot ◽  
Efficient Catalyst ◽  
Short Reaction Time ◽  
Acidic Ionic Liquid ◽  
Solvent Free Synthesis

AbstractA one-pot three-component Biginelli-like reaction of enaminones, aldehydes with urea/thiourea in the presence of 2-pyrrolidonium bisulphate as an acidic ionic liquid catalyst for the preparation of 6-unsubstituted dihydropyrimidinones is described. The excellent yield, short reaction time, simple procedure and avoidance of the use of organic solvents are some advantages of this method.

A metal-free and a solvent-free synthesis of thio-amides and amides: an efficient Friedel–Crafts arylation of isothiocyanates and isocyanates

RSC Advances ◽  
2014 ◽  
Vol 4 (105) ◽  
pp. 60798-60807 ◽  
Author(s):  
Begur Vasanthkumar Varun ◽  
Ankush Sood ◽  
Kandikere Ramaiah Prabhu
Keyword(s):  
Solvent Free ◽  
Triflic Acid ◽  
Reaction Conditions ◽  
Metal Free ◽  
Super Acid ◽  
Solvent Free Synthesis

A rapid, metal-free and solvent-free (very low loading of solvent in few cases) reaction conditions for synthesizing thioamides and amides using a Bronsted super acid such as triflic acid has been developed.

Solvent-Free Synthesis of Diazocine

Synthesis ◽  
2017 ◽  
Vol 49 (15) ◽  
pp. 3471-3475 ◽  
Author(s):  
Widukind Moormann ◽  
Daniel Langbehn ◽  
Rainer Herges
Keyword(s):  
Solvent Free ◽  
Second Step ◽  
Oxidative Dimerization ◽  
Reaction Conditions ◽  
Reducing Conditions ◽  
Lead Powder ◽  
Potential Applications ◽  
The Stability ◽  
Solvent Free Synthesis ◽  
Solvent Free Reaction

A convenient two-step synthesis of diazocine starting from 2-nitrotoluene is described. The first step, the oxidative dimerization of 2-nitrotoluene, is improved to 95% yield. The second step, the reductive azo cyclization, is performed as a solvent-free reaction with lead powder in a ball mill (51% yield). As a reference, the previously described azo cyclization with Zn/Ba(OH)2 is investigated in detail. The results explain why in previous experiments the yields are low and extremely dependent on the reaction conditions. In view of potential applications in photopharmacology, we checked the stability under reducing conditions. Diazocine does not react with glutathione, indicating intracellular stability.

Microwave Accelerated Solvent-Free Synthesis of 1,3,4-Oxadiazoles Using Polymer Supported Dehydration Reagent.

ChemInform ◽  
2005 ◽  
Vol 36 (2) ◽  
Author(s):  
Zheng Li ◽  
Jinlan Yu ◽  
Runbo Ding ◽  
Zhiyuan Wang ◽  
Xicun Wang
Keyword(s):  
Solvent Free ◽  
Polymer Supported ◽  
Solvent Free Synthesis

Solvent-free Synthesis of 1,2-Disubstituted Derivatives of 1,2- Dihydroisoquinoline, 1,2-Dihydroquinoline and 1,2-Dihydropyridine

2013 ◽  
Vol 68 (7) ◽  
pp. 818-822 ◽  
Author(s):  
Rahimeh Hajinasiri ◽  
Sobhan Rezayati
Keyword(s):  
Room Temperature ◽  
Solvent Free ◽  
Reaction Conditions ◽  
One Pot ◽  
Efficient Approach ◽  
Dialkyl Acetylenedicarboxylates ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
Derivatives Of ◽  
Solvent Free Synthesis

A one-pot and efficient approach to the synthesis of dialkyl 2-[1-[(alkoxycarbonyl)anilino]-2(1H)- (isoquinolin-2-yl) (or -quinolin-1-yl or -pyridin-1-yl)]-2-butenedioates is described. This method involves a three-component reaction between isoquinoline, quinoline or pyridine, dialkyl acetylenedicarboxylates and N-phenylcarbamates under solvent-free conditions, without using any catalyst and at room temperature. The mild reaction conditions and good yields of the products exhibit the synthetic advantage of this method.

Sign in / Sign up

Export Citation Format

Share Document