A facile one-pot synthesis of 3-unsubstituted-2,4-oxazolidinediones via in situ generation of carbamates from α-hydroxyesters using trichloroacetyl isocyanate
作者:Yue H. Li、Li Zhang、Pei-San Tseng、Yongliang Zhang、Yu Jin、Jingkang Shen、Jian Jin
DOI:10.1016/j.tetlet.2008.11.124
日期:2009.2
methodology for the synthesis of pharmaceutically interesting 3-unsubstituted-2,4-oxazolidinediones from α-hydroxyesters is described. A primary carbamate was generated in situ from the corresponding α-hydroxyester and trichloroacetyl isocyanate, then converted to the desired 3-unsubstituted 2,4-oxazolidinedione via intramolecular ring closure. This method is amenable to scale-up and requires no chromatographic
描述了一种方便,高产率的一锅法,用于从α-羟基酯合成可药用的3-un取代的2,4-恶唑烷二酮。由相应的α-羟基酯和三氯乙酰基异氰酸酯原位生成伯氨基甲酸酯,然后通过分子内闭环将其转化为所需的3-未取代的2,4-恶唑烷二酮。该方法适合扩大规模,无需色谱纯化。