A comparative study of the catalytic activity of Co- and CoFe2O4-NPs in C-N and C-O bond formation: synthesis of benzimidazoles and benzoxazoles from o-haloanilides

作者：Hajipour Abdol R; Khorsandi Zahra

来源：New Journal of Chemistry, 2016, 40(12): 10474-10481.

DOI：10.1039/c6nj02293f

Nanoparticles of cobalt ferrite (CoFe2O4-NPs) and pure cobalt (Co-NPs) were synthesized, and after characterization, their catalytic activities for dehalogenative intramolecular C-O and C-N bond formation reactions were investigated and compared. These inexpensive and efficient catalysts enabled creation of new methods for the synthesis of benzimidazoles and benzoxazoles in green media, with ligand-free and mild reaction conditions. All the reactions resulted in moderate to excellent yields under the optimized reaction conditions; however, the reactions using Co-NPs as the catalyst were completed in relatively shorter reaction times. Furthermore, analysis showed that the reusability of the two catalytic systems is approximately comparable.

• 出版日期2016-12