Water in Oil Microemulsions as Reaction Media for a Diels−Alder Reaction betweenN-Ethylmaleimide and Cyclopentadiene

2006 ◽  
Vol 71 (11) ◽  
pp. 4111-4117 ◽  
Author(s):  
J. B. F. N. Engberts ◽  
E. Fernández ◽  
L. García-Río ◽  
J. R. Leis
Keyword(s):  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction ◽  
Reaction Media

scholarly journals N-hexylpyridinium bis(trifluoromethylsulfonyl)imide and Lewis acids — catalytic systems for Diels-Alder reaction

2011 ◽  
Vol 9 (1) ◽  
pp. 192-198 ◽  
Author(s):  
Bożena Bittner ◽  
Ewa Janus ◽  
Eugeniusz Milchert
Keyword(s):  
Ionic Liquid ◽  
Rate Constants ◽  
Lewis Acids ◽  
Reaction Rate ◽  
Alder Reaction ◽  
Diels Alder ◽  
Catalytic Systems ◽  
Reaction Rate Constants ◽  
Diels Alder Reaction ◽  
Reaction Media

AbstractA comparative study of the Diels-Alder reactions between cyclopentadiene (1) and dienophiles (2 a–c) in N-hexylpyridinium bis(trifluoromethylsulfonyl)imide in a temperature range of 20–45°C is reported. The reaction rate constants and activation energies were calculated. Moreover, the catalytic systems based on N-hexylpyridinium bis(trifluoromethylsulfonyl)imide and Lewis acids were tested as a reaction media to perform the Diels-Alder reaction. Yb, Y, Mg, Zn triflates and chlorides (0.005 to 0.1 mmol) were used as catalysts. The recycling of catalytic system consisted of YCl3 and ionic liquid was performed.

scholarly journals Liquid-Crystalline Ionic Liquids as Ordered Reaction Media for the Diels-Alder Reaction

2016 ◽  
Vol 22 (45) ◽  
pp. 16113-16123 ◽  
Author(s):  
Duncan W. Bruce ◽  
Yanan Gao ◽  
José Nuno Canongia Lopes ◽  
Karina Shimizu ◽  
John M. Slattery
Keyword(s):  
Ionic Liquids ◽  
Liquid Crystalline ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction ◽  
Reaction Media

The Diels-Alder Reaction of 2-Ethenyl-1,4-Benzodioxin: A New and Simple Synthesis of Bisaryl Ethers

Synlett ◽  
1989 ◽  
Vol 1989 (01) ◽  
pp. 30-32
Author(s):  
Thomas V. Lee ◽  
Alistair J. Leigh ◽  
Christopher B. Chapleo
Keyword(s):  
Alder Reaction ◽  
Diels Alder ◽  
Simple Synthesis ◽  
Diels Alder Reaction

The intermolecular anthracene-transfer in a regiospecific antipodal C60 difunctionalization

2020 ◽  
Author(s):  
Radu Talmazan ◽  
Klaus R. Liedl ◽  
Bernhard Kräutler ◽  
Maren Podewitz
Keyword(s):  
Noncovalent Interactions ◽  
Interaction Model ◽  
Alder Reaction ◽  
Diels Alder ◽  
Stacking Interactions ◽  
Pi Stacking ◽  
Diels Alder Reaction ◽  
Double Decker ◽  
Anthracene Molecule ◽  
New Strategies

We analyze the mechanism of the topochemically controlled difunctionalization of C60 and anthracene, where an anthracene molecule is transferred from one C60 monoadduct to another one under exclusive formation of equal amounts of C60 and the difficult to make antipodal C60 bisadduct. Our herein disclosed dispersion corrected DFT studies show the anthracene transfer to take place in a synchronous retro Diels-Alder/Diels-Alder reaction: an anthracene molecule dissociates from one fullerene under formation of an intermediate, while already undergoing stabilizing interactions with both neighboring fullerenes, facilitating the reaction kinetically. In the intermediate, a planar anthracene molecule is sandwiched between two neighboring fullerenes and forms equally strong "double-decker" type pi-pi stacking interactions with both of these fullerenes. Analysis with the distorsion interaction model shows that the anthracene unit of the intermediate is almost planar with minimal distorsions. This analysis sheds light on the existence of noncovalent interactions engaging both faces of a planar polyunsaturated ring and two convex fullerene surfaces in an unprecedented 'inverted sandwich' structure. Hence, it sheds light on new strategies to design functional fullerene based materials.<br>

Natural Products Biosynthesis Involving a Putative Diels-Alder Reaction

2016 ◽  
Vol 20 (22) ◽  
pp. 2421-2442 ◽  
Author(s):  
Kévin Cottet ◽  
Maria Kolympadi ◽  
Dean Markovic ◽  
Marie-Christine Lallemand
Keyword(s):  
Natural Products ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction
Sign in / Sign up

Export Citation Format

Share Document