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.
报道了一种用异硫氰酸芳基酯环化 2-硝基苯酚的方法。反应在乙酰丙酮铁(iii)催化剂、元素硫、作为碱的NaOH和作为溶剂的DMSO的存在下进行。成功分离出带有硝基、氰基、乙酰基、砜、仲胺和吡咯基的2-氨基苯并恶唑衍生物。