Sustainable approach to tandem catalysis: Expedient access to quinoxalines and pyrido[2,3-b]pyrazines from ⍺-hydroxyketones via microwave-induced [(NH4)6Mo7O24·4H2O – PEG 300] polar paste catalyst system - 17/09/12
![](/templates/common/images/mail.png)
![](/templates/common/images/mail.png)
![](/templates/common/images/entites/204e.gif)
pages | 4 |
Iconographies | 2 |
Vidéos | 0 |
Autres | 0 |
Abstract |
[(NH4)6Mo7O24·4H2O–PEG 300] is introduced as a polar paste catalyst system for tandem synthesis of quinoxalines and pyrido[2,3-b]pyrazines under open-vessel focused microwave irradiation. Low conversions were obtained when catalyst or PEG was used individually. Accordingly, a convenient combination of catalyst and PEG mostly led to quantitative yield of products within 15min microwave irradiation with good turnover frequency values (11–20h−1) taking a tandem process into consideration. The salient features of this environmentally benign method are fast conversions, high product selectivity and the use of a low-cost, readily available, nontoxic, catalyst and medium.
Le texte complet de cet article est disponible en PDF.Keywords : [(NH4)6Mo7O24·4H2O–PEG 300], Tandem oxidation process, Benzo[N,N]-heterocycle, ⍺-Hydroxy ketone, Open-vessel microwave irradiation
Plan
Vol 15 - N° 9
P. 764-767 - septembre 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 ?