| Titre : | CuO Nanoparticles : a simple, effective, ligand free, and reusable heterogeneous catalyst for N-arylation of benzimidazole (2011) |
| Auteurs : | Sundaram Ganesh Babu, Auteur ; Ramasamy Karvembu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 50 N° 16, Août 2011) |
| Article en page(s) : | pp. 9594-9600 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | 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 |
