Ligand-Free Copper-Catalyzed Synthesis of Substituted Benzimidazoles, 2-Aminobenzimidazoles, 2-Aminobenzothiazoles, and Benzoxazoles was written by Saha, Prasenjit;Ramana, Tamminana;Purkait, Nibadita;Ali, Ashif Md;Paul, Rajesh;Punniyamurthy, Tharmalingam. And the article was included in Journal of Organic Chemistry in 2009.COA of Formula: C13H8BrNO This article mentions the following:
The synthesis of substituted benzimidazoles, 2-aminobenzimidazoles, 2-aminobenzothiazoles, and benzoxazoles is described via intramol. cyclization of o-bromoaryl derivatives using copper(II) oxide nanoparticles in DMSO under air. E.g., cyclization of o-bromoaryl amidine I gave 95% benzimidazoles II. The procedure is exptl. simple, general, efficient, and free from addition of external chelating ligands. It is a heterogeneous process and the copper(II) oxide nanoparticles can be recovered and recycled without loss of activity. In the experiment, the researchers used many compounds, for example, 2-(3-Bromophenyl)benzo[d]oxazole (cas: 99586-31-9COA of Formula: C13H8BrNO).
2-(3-Bromophenyl)benzo[d]oxazole (cas: 99586-31-9) belongs to benzoxazole derivatives. Benzoxazole nucleus is one of the most important heterocyclic compounds exhibiting remarkable pharmacological activities. Due to its versatile biological properties, benzoxazole has been incorporated as an essential pharmacophore and substructure in many medicinal compounds.COA of Formula: C13H8BrNO
Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem