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Commercial zinc oxide / Reza Tayebee in Industrial & engineering chemistry research, Vol. 51 N° 44 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14577-14582 Titre : Commercial zinc oxide : A facile, efficient, and Eco-friendly catalyst for the one-pot three-component synthesis of multisubstituted 2-aminothiophenes via the gewald reaction Type de document : texte imprimé Auteurs : Reza Tayebee, Auteur ; S. Javad Ahmadi, Auteur ; Esmaeil Rezaei Seresht, Auteur Année de publication : 2013 Article en page(s) : pp. 14577-14582 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst Résumé : An eco-friendly, simple, and effective protocol is developed for the synthesis of various multisubstituted 2-aminothiophenes. In the presence of a catalytic amount of ZnO (5 mol %), ketones or aldehydes, malononitrile and elemental sulfur were converted to the corresponding 2-aminothiophene derivatives in moderate to high yields (27%―70%) under solvent-free conditions at 100 °C. Zinc oxide as an efficient, readily available, and reusable catalyst, showed very good catalytic activity for the synthesis of 2-aminothiophene derivatives. Thus far, little research has been reported on the Gewald reaction under solventfree conditions; to the best of our knowledge, this is the first time that it has been proposed as an inexpensive and readily available catalyst for use in the target synthetic route. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620372 [article] Commercial zinc oxide : A facile, efficient, and Eco-friendly catalyst for the one-pot three-component synthesis of multisubstituted 2-aminothiophenes via the gewald reaction [texte imprimé] / Reza Tayebee, Auteur ; S. Javad Ahmadi, Auteur ; Esmaeil Rezaei Seresht, Auteur . - 2013 . - pp. 14577-14582. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14577-14582 Mots-clés : Catalyst Résumé : An eco-friendly, simple, and effective protocol is developed for the synthesis of various multisubstituted 2-aminothiophenes. In the presence of a catalytic amount of ZnO (5 mol %), ketones or aldehydes, malononitrile and elemental sulfur were converted to the corresponding 2-aminothiophene derivatives in moderate to high yields (27%―70%) under solvent-free conditions at 100 °C. Zinc oxide as an efficient, readily available, and reusable catalyst, showed very good catalytic activity for the synthesis of 2-aminothiophene derivatives. Thus far, little research has been reported on the Gewald reaction under solventfree conditions; to the best of our knowledge, this is the first time that it has been proposed as an inexpensive and readily available catalyst for use in the target synthetic route. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620372