Zirconium oxide (NP) - ionic liquid as an efficient media for the domino Knoevenagel hetero Diels-Alder reaction with unactivated alkynes - 24/03/12
, Ali Poursaeed a, Malihe Javan Khoshkholgh a, Hamid Reza Bijanzadeh b, Eckardt Wolf c| pages | 7 |
| Iconographies | 4 |
| Vidéos | 0 |
| Autres | 0 |
Graphical abstract |
Abstract |
Immobilized ZrO2-nanopowder (NP) in ionic liquid and different organic solvents was used as a suitable Lewis-acid for the synthesis of polycyclic heterocycles which contains pyran-based skeletons. Reaction of O-propargylated salicylaldehyde with active methylene compounds in the presence of ZrO2-NP in ionic liquid proceeds via domino Knoevenagel hetero Diels-Alder reaction of unactivated alkynes to construct the pyran skeleton. Comparison with different ionic liquids and organic solvents showed that the best results were obtained with 1-butyl-3-methylimidazolium nitrate [bmim][NO3] because of short reaction times and high yields. Carrying out the reaction under these conditions has advantages such as: high yields, short reaction times and easy work-up.
Le texte complet de cet article est disponible en PDF.Keywords : Ionic liquid in synthesis of heterocycles, ZrO2 nanopowder (ZrO2-NP), Domino Knoevenagel hetero-Diels-Alder reaction, Unactivated alkynes, [bmim][NO3]
Plan
Vol 15 - N° 4
P. 283-289 - avril 2012 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’achat d’article à l’unité est indisponible à l’heure actuelle.
Déjà abonné à cette revue ?
