Reactivity and selectivity under microwaves in organic chemistry. Relation with medium effects and reaction mechanisms

2001 ◽  
Vol 73 (1) ◽  
pp. 161-166 ◽  
Author(s):  
André Loupy ◽  
Laurence Perreux ◽  
Marion Liagre ◽  
Karine Burle ◽  
Michel Moneuse
Keyword(s):  
Organic Chemistry ◽  
Reaction Mechanisms ◽  
Reaction Medium ◽  
Solvent Free ◽  
Microwave Activation ◽  
Medium Effects ◽  
Specific Effects ◽  
Solvent Free Conditions

Typical applications of solvent-free conditions and microwave activation are described. Non-purely thermal specific effects are evidenced and discussed in terms of reaction medium and mechanisms, taking into account the variations in polarity of the systems.

Withdrawal Notice: Recent Advances in Sonogashira Cross-Coupling Reactions Under Solvent-Free Conditions

2020 ◽  
Vol 24 ◽  
Author(s):  
Teng Wang ◽  
Zongrui Liu ◽  
Songlin Wang ◽  
Esmail Vessally
Keyword(s):  
Organic Chemistry ◽  
Editorial Policy ◽  
Cross Coupling ◽  
Solvent Free ◽  
Coupling Reactions ◽  
Editorial Policies ◽  
Cross Coupling Reactions ◽  
Recent Advances ◽  
Solvent Free Conditions ◽  
Copyright Permission

The article has been withdrawn at the request of editor of the journal Current Organic Chemistry: Bentham Science apologizes to the readers of the journal for any inconvenience this may have caused. The Bentham Editorial Policy on Article Withdrawal can be found at https://benthamscience.com/editorial-policies-main.php BENTHAM SCIENCE DISCLAIMER: It is a condition of publication that manuscripts submitted to this journal have not been published and will not be simultaneously submitted or published elsewhere. Furthermore, any data, illustration, structure or table that has been published elsewhere must be reported, and copyright permission for reproduction must be obtained. Plagiarism is strictly forbidden, and by submitting the article for publication the authors agree that the publishers have the legal right to take appropriate action against the authors, if plagiarism or fabricated information is discovered. By submitting a manuscript, the authors agree that the copyright of their article is transferred to the publishers if and when the article is accepted for publication.

ChemInform Abstract: Reactivity and Selectivity under Microwaves in Organic Chemistry. Relation with Medium Effects and Reaction Mechanisms

ChemInform ◽  
2010 ◽  
Vol 32 (38) ◽  
pp. no-no
Author(s):  
Andre Loupy ◽  
Laurence Perreux ◽  
Marion Liagre ◽  
Karine Burle ◽  
Michel Moneuse
Keyword(s):  
Organic Chemistry ◽  
Reaction Mechanisms ◽  
Medium Effects

scholarly journals The Reaction of Aza Michael Catalyzed by Zeolite Cu-ZSM-5 under Solvent-Free Conditions

2018 ◽  
pp. 1-7
Author(s):  
Elmeliani M’hammed ◽  
Djafri Fatiha ◽  
Djafri Ayada
Keyword(s):  
Organic Chemistry ◽  
Room Temperature ◽  
Zeolite Catalyst ◽  
Catalytic Efficiency ◽  
Solvent Free ◽  
High Yield ◽  
Chiral Auxiliaries ◽  
Amino Esters ◽  
New Synthesis ◽  
Solvent Free Conditions

The study is carried out to test the catalytic efficiency of Cu-ZSM-5 zeolite catalyst on the reaction of Aza Michael under solvent-free conditions, at room temperature this reaction is most exploited in organic chemistry, b-amino -esters, ketones, nitriles are useful for the preparation of several natural bioactive products, antibiotics, and chiral auxiliaries, through the use of the porous material catalyst (zeolite Cu-ZSM-5), and the reaction of Aza Michael addition a series of amines on α, β-unsaturated methyl acrylate, we have synthesized new cc or c-heteroatom products, these compounds is an attractive area of researchers in synthetic organic chemistry, and we have developed new synthesis methodologies for the preparation of these products. The reaction was carried out with favourable conditions: ambient temperature, and without solvent, that the products, which are synthesized, gave us a high yield, and excellent chemoselectivity.

Synthesis of phosphonium salts under microwave activation — Leaving group and phosphine substituents effects

2004 ◽  
Vol 82 (9) ◽  
pp. 1365-1371 ◽  
Author(s):  
Ján Cvengros ◽  
Stefan Toma ◽  
Sylvain Marque ◽  
André Loupy
Keyword(s):  
Microwave Irradiation ◽  
Thermal Effects ◽  
Alkylating Agents ◽  
Microwave Activation ◽  
Phosphonium Salts ◽  
Specific Effects ◽  
Solvent Free Conditions ◽  
Leaving Group ◽  
Mw Irradiation ◽  
Leaving Groups

The specific nonpurely thermal effects of microwaves were evidenced according to neutral or charged leaving groups during nucleophilic substitution of benzylic electrophiles with triphenylphosphine and tributylphosphine. Microwave (MW) irradiation considerably enhanced the reactions with charged alkylating agents, especially under solvent-free conditions. Results are interpreted considering the magnitude of MW effects according to the position of the transition state along the reaction coordinates.Key words: microwave irradiation, specific effects, phosphonium salts, leaving group effects.

Sign in / Sign up

Export Citation Format

Share Document