A facile one-pot synthesis of 3-benzoxazol-2-yl-chromen-2-ones (4) by the condensation of chromen-2-one-3-carboxylates (1) with o-hydroxy aniline (3) is being reported in this paper. Alternatively 3-benzoxazol-2-yl-chromen-2-ones are prepared from chromen-2-one-3-carboxylic acids (2). The structures of all the products have been established by their spectral and analytical data.
本文报告了一种通过
铬烯-2-酮-3-
羧酸(1)与邻羟基
苯胺(3)缩合,一步合成 3-
苯并恶唑-2-基苯并
吡喃-2-酮(4)的简便方法。另外,3-
苯并恶唑-2-基色烯-2-酮也是由
铬烯-2-酮-3-
羧酸(2)制备的。所有产物的结构均已通过光谱和分析数据确定。