Compositions comprising certain 2-(substituted anilino)benzoxazoles, such as 2-[4-bromo-3-(trifluoromethyl)-anilino]benzoxazole, and methods for using same as immunosuppressive agents, antifertility agents, for the prophylaxis of Marek's disease in chickens and as herbicides.
Utilization of 2-nitrophenols in annulations with aryl isothiocyanates towards the synthesis of 2-aminobenzoxazoles
作者:Thanh D. Nguyen、Danh T. Tran、Tan N. Huynh、Thang M. Ly、Tung T. Nguyen
DOI:10.1039/d3ra02873a
日期:——
A method for the annulation of 2-nitrophenols with aryl isothiocyanates is reported. The reactions proceeded in the presence of an iron(iii) acetylacetonate catalyst, elemental sulfur, NaOH as a base, and DMSO as a solvent. Derivatives of 2-aminobenzoxazoles bearing nitro, cyano, acetyl, sulfone, secondary amine, and pyrrolyl groups were successfully isolated.
Synthesis of 2-aminobenzoxazoles from elemental sulfur mediated cyclization of 2-aminophenols and aryl isothiocyanates
作者:Danh T. Tran、Tan N. Huynh、Phuc C. Nguyen、Nam T.S. Phan、Tung T. Nguyen
DOI:10.1016/j.tetlet.2023.154510
日期:2023.6
We report a method for cyclization of substituted 2-aminophenols and aryl isothiocyanates to afford 2-aminobenzoxazoles. Reactions proceeded in the presence of elementalsulfur, potassium carbonate base, and DMSO solvent. The conditions were tolerant of useful functionalities including halogen, nitro, and pyridine groups.