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CuO Nanoparticles / Sundaram Ganesh Babu in Industrial & engineering chemistry research, Vol. 50 N° 16 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9594-9600 Titre : CuO Nanoparticles : a simple, effective, ligand free, and reusable heterogeneous catalyst for N-arylation of benzimidazole Type de document : texte imprimé Auteurs : Sundaram Ganesh Babu, Auteur ; Ramasamy Karvembu, Auteur Année de publication : 2011 Article en page(s) : pp. 9594-9600 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Heterogeneous  catalysis  Ligand  Nanoparticle Résumé : Copper(II) oxide (CuO) nanoparticles have been synthesized from copper acetate by simple precipitation method and were found to be an efficient and inexpensive catalyst for C―N cross-coupling reactions of benzimidazole with various aryl halides. The catalyst was characterized by scanning electron microscope, transmission electron microscope, Brunauer―Emmett―Teller—surface area, and X-ray diffraction analysis. Benzimidazole undergoes reaction with aryl bromides, aryl chlorides, or aryl fluorides in the presence of K2CO3 at moderate temperature. The yield of N-arylated benzimidazole is ranging from 55 to 92%. The effect of the particle size of the catalyst on N-arylation of benzimidazole with 4-chlorobenzonitrile was studied. Reusability of the CuO nanoparticles was also carried out, and the results were found to be good. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425202 [article] CuO Nanoparticles : a simple, effective, ligand free, and reusable heterogeneous catalyst for N-arylation of benzimidazole [texte imprimé] / Sundaram Ganesh Babu, Auteur ; Ramasamy Karvembu, Auteur . - 2011 . - pp. 9594-9600. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 16 (Août 2011) . - pp. 9594-9600 Mots-clés : Heterogeneous  catalysis  Ligand  Nanoparticle Résumé : Copper(II) oxide (CuO) nanoparticles have been synthesized from copper acetate by simple precipitation method and were found to be an efficient and inexpensive catalyst for C―N cross-coupling reactions of benzimidazole with various aryl halides. The catalyst was characterized by scanning electron microscope, transmission electron microscope, Brunauer―Emmett―Teller—surface area, and X-ray diffraction analysis. Benzimidazole undergoes reaction with aryl bromides, aryl chlorides, or aryl fluorides in the presence of K2CO3 at moderate temperature. The yield of N-arylated benzimidazole is ranging from 55 to 92%. The effect of the particle size of the catalyst on N-arylation of benzimidazole with 4-chlorobenzonitrile was studied. Reusability of the CuO nanoparticles was also carried out, and the results were found to be good. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24425202