6824-60-8Relevant articles and documents
Polyelectrolyte-catalyzed Diels–Alder reactions
Pothanagandhi, Nellepalli,Sivaramakrishna, Akella,Vijayakrishna, Kari
, p. 132 - 136 (2016/08/05)
Imidazolium-based poly(ionic liquids) bearing bromide and bis(trifluoromethane)sulfonimide as counteranions [poly(ViEIm)Br and poly(ViEIm)NTf2] derived from reversible addition fragmentation chain transfer (RAFT) polymerization techniques are u
Diels-Alder reactions in pyridinium based ionic liquids
Xiao, Ying,Malhotra, Sanjay V.
, p. 8339 - 8342 (2007/10/03)
Diels-Alder reactions have been investigated in pyridinium based ionic liquids. These solvents are found to be more effective compared to the organic solvent studied, in enhancing the reaction rate and product yields. Recycled ionic liquids also gave exce
Solvent effects on Diels-Alder reactions. the use of aqueous mixtures of fluorinated alcohols and the study of reactions of acrylonitrile
Cativiela, Carlos,Garcia, Jose I.,Gil,Martinez, Rosa M.,Mayoral, Jose A.,Salvatella, Luis,Urieta, Jose S.,Mainar,Abraham, Michael H.
, p. 653 - 660 (2007/10/03)
Rate, endolexo, regio- and diastereo-facial selectivities of several Diels-Alder reactions were measured in a series of fluorinated alcohol-water mixtures, whose solvophobicity has been determined by means of the solvophobic power (Sp) parameter. Solvophobicity is the main factor influencing the reaction rate, although in some reactions hydrogen bond donating (HBD) ability may also play a role. Both solvophobicity and HBD ability are important to account for changes in endolexo selectivity. HBD ability is the main factor responsible for the changes in regio- and diastereo-facial selectivities, induced by the reaction medium. On the other hand, the kinetic rate constants and endolexo selectivity of the reaction of acrylonitrile with cyclopentadiene, as well as the regioselectivity of the reaction of acrylonitrile with isoprene, have been determined in 23 reaction media. The analysis of the results using empirical solvent parameters show that the reaction rate depends on solvophobic, HBD and dipolarity interactions, whereas endolexo selectivity is influenced by solvophobic and dipolarity interactions, and the regioselectivity only by HBD effects.