scholarly journals Borenium ionic liquids as catalysts for Diels–Alder reaction: tuneable Lewis superacids for catalytic applications

2017 ◽  
Vol 7 (5) ◽  
pp. 1045-1049 ◽  
Author(s):  
K. Matuszek ◽  
S. Coffie ◽  
A. Chrobok ◽  
M. Swadźba-Kwaśny
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Alder Reaction ◽  
Diels Alder ◽  
Lewis Acidity ◽  
High Catalytic Activity ◽  
Acceptor Number ◽  
Diels Alder Reaction ◽  
Catalytic Applications

Ionic liquids with Lewis superacidic borenium cations were used as catalysts in solvent-less Diels–Alder cycloaddition. The extremely high catalytic activity correlated with the Lewis acidity, expressed as the Gutmann acceptor number.

scholarly journals Ionic liquids - deanol derivatives as the Diels-Alder reaction solvents

2010 ◽  
Vol 8 (5) ◽  
pp. 1140-1146 ◽  
Author(s):  
Ewa Janus ◽  
Anna Syguda ◽  
Katarzyna Materna
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Acid Catalyst ◽  
Alder Reaction ◽  
Diels Alder ◽  
Reaction Yield ◽  
Catalytic Systems ◽  
Diels Alder Reaction ◽  
Lewis Acid Catalyst ◽  
Metal Triflates

AbstractThe Diels-Alder reaction between cyclopentadiene and dienophiles in deanol derivatives containing bis(trifluoromethylsulfonyl)imide anion as media have been studied. The effect of the substituents attached to the cation on the endo:exo selectivity as well as the reaction yield have been evaluated in the absence and presence of Lewis acid catalyst - Y(OTf)3. Catalytic activity of metal triflates and the recycling of chosen catalytic systems have also been investigated

Chiral Cationic Pd-Phosphinooxazolidine Catalysts for a Highly Efficient Asymmetric Diels-Alder Reaction in Ionic Liquids

Heterocycles ◽  
2008 ◽  
Vol 76 (1) ◽  
pp. 381 ◽  
Author(s):  
Hiroto Nakano ◽  
Mitsuhiro Takeshita ◽  
Yasuhiro Nishiuchi ◽  
Kouichi Takahashi ◽  
Reiko Fujita ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Alder Reaction ◽  
Diels Alder ◽  
Highly Efficient ◽  
Diels Alder Reaction

scholarly journals Ionic-Liquid-Mediated MacMillan’s Catalyst for Diels-Alder Reaction

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Vivek Srivastava
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction

Ionic liquids were used to enhance as well as recycle the MacMillan's catalyst1for the Diels-Alder reaction. Using our developed protocol, Diels-Alder adducts were obtained in good yields and selectivities along the 6 times recycling of MacMillan's imidazolidinone catalyst1. Synthesis of steroid4is the major outcome of our developed protocol.

A Theoretical Analysis of a Diels−Alder Reaction in Ionic Liquids

2009 ◽  
Vol 113 (24) ◽  
pp. 8227-8230 ◽  
Author(s):  
Seigo Hayaki ◽  
Kentaro Kido ◽  
Daisuke Yokogawa ◽  
Hirofumi Sato ◽  
Shigeyoshi Sakaki
Keyword(s):  
Ionic Liquids ◽  
Theoretical Analysis ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction

Lanthanide catalysts for the hetero Diels–Alder reaction: effect of ligand structure and acidity

1997 ◽  
Vol 75 (8) ◽  
pp. 1047-1054 ◽  
Author(s):  
Claude Spino ◽  
Laurel L. Clouston ◽  
David J. Berg
Keyword(s):  
Catalytic Activity ◽  
Vinyl Ether ◽  
Alder Reaction ◽  
Diels Alder ◽  
Ethyl Vinyl Ether ◽  
Ethyl Vinyl ◽  
Catalytic Activities ◽  
Ligand Structure ◽  
Bite Angle ◽  
Diels Alder Reaction

A series of yttrium, ytterbium, and lanthanum hexa-or heptacoordinate complexes were prepared and their catalytic activities tested in the hetero Diels–Alder reaction between crotonaldehyde and ethyl vinyl ether. It was found that a pKa below 7 of the ligand was necessary but not sufficient for catalytic activity. It was determined that the ligand should possess a perfluoromethyl-β-diketonate functionality. Other factors such as bite angle and hinging motion may also play a determining role. Keywords: lanthanide, catalyst, hetero Dielsis–Alder, yttrium, ytterbium, lanthanum.

Photo-controlled Lewis Acidity: Chiral (ON)Ru-Salen Catalyzed Hetero Diels-Alder Reaction and Kinetic Resolution of Racemic Epoxides

Synlett ◽  
1999 ◽  
Vol 1999 (7) ◽  
pp. 1160-1162 ◽  
Author(s):  
Jun Mihara ◽  
Tetsuya Hamada ◽  
Tsuyoshi Takeda ◽  
Ryo Irie ◽  
Tsutomu Katsuki
Keyword(s):  
Kinetic Resolution ◽  
Alder Reaction ◽  
Diels Alder ◽  
Lewis Acidity ◽  
Diels Alder Reaction
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