A DFT study of the role of Lewis acid catalysts in the mechanism of the 1,3-dipolar cycloaddition of nitrile imines towards electron-deficient acryloyl derivatives

2012 ◽  
Vol 986 ◽  
pp. 6-13 ◽  
Author(s):  
Luis R. Domingo ◽  
M. José Aurell ◽  
Rachid Jalal ◽  
M’hamed Esseffar
Keyword(s):  
Lewis Acid ◽  
Dft Study ◽  
Dipolar Cycloaddition ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
Nitrile Imines

A DFT study of the role of the Lewis acid catalysts in the [3 + 2] cycloaddition reaction of the electrophilic nitrone isomer of methyl glyoxylate oxime with nucleophilic cyclopentene

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64098-64105 ◽  
Author(s):  
Abdelmalek Khorief Nacereddine ◽  
Hatem Layeb ◽  
Fouad Chafaa ◽  
Wassila Yahia ◽  
Abdelhafid Djerourou ◽  
...  
Keyword(s):  
Lewis Acid ◽  
Cycloaddition Reaction ◽  
Dft Study ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
Computational Level

The mechanism and stereoselectivity of the BH3-catalysed 32CA reaction between C-methoxycarbonyl nitrone and cyclopentene has been studied using MPWB1K/6-31G(d) computational level.

Hydrothermal synthesis of Sn-Beta zeolites in F−-free medium

2018 ◽  
Vol 5 (11) ◽  
pp. 2763-2771 ◽  
Author(s):  
Hao Xu ◽  
Xudong Wang ◽  
Peng Ji ◽  
Haihong Wu ◽  
Yejun Guan ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Lewis Acid ◽  
Crystal Size ◽  
Acid Catalysts ◽  
Free Medium ◽  
Lewis Acid Catalysts ◽  
Structure Directing Agent ◽  
Highly Active ◽  
Beta Zeolites

Sn-Beta zeolites, with high Sn content and smaller crystal size, hydrothermally synthesized in F−-free medium using N-cyclohexyl-N,N-dimethylcyclohexanaminium hydroxide as the structure-directing agent with the assistance of Na+ and seed, are highly active as Lewis acid catalysts.

Assessment of fluoroalkyltin compounds as fluorous Lewis acid catalysts

2003 ◽  
Vol 17 (10) ◽  
pp. 795-799 ◽  
Author(s):  
Yasuo Imakura ◽  
Satoru Nishiguchi ◽  
Akihiro Orita ◽  
Junzo Otera
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts

ChemInform Abstract: Calcium-Based Lewis Acid Catalysts

ChemInform ◽  
2013 ◽  
Vol 44 (40) ◽  
pp. no-no
Author(s):  
Jeanne-Marie Begouin ◽  
Meike Niggemann
Keyword(s):  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts

Catalyzed Orientation Reversals in Diels–Alder Reactions

1975 ◽  
Vol 53 (4) ◽  
pp. 616-618 ◽  
Author(s):  
Žarko Stojanac ◽  
Robert A. Dickinson ◽  
Nada Stojanac ◽  
Ronald J. Woznow ◽  
Zdenek Valenta
Keyword(s):  
Lewis Acid ◽  
Diels Alder ◽  
Acid Catalysts ◽  
Acid Salt ◽  
Lewis Acid Catalysts ◽  
Preferential Formation ◽  
Orientation Reversal

Lewis acid catalysts cause an orientation reversal in the Diels–Alder additions of 2,6-di-methyl-1,4-quinone (1) and toluquinone (12) to 1-substituted 1,3-butadienes and to 1,2- and 1,3-dialkyl dienes. These results are explained by the preferential formation of one reactive quinone–Lewis acid salt.

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