Stereoselective Synthesis of the Published Structure of Feigrisolide A. Structural Revision of Feigrisolides A and B
作者:Paula Álvarez-Bercedo、Juan Murga、Miguel Carda、J. Alberto Marco
DOI:10.1021/jo060314q
日期:2006.7.1
The total synthesis of the proposed structure of feigrisolide A is reported. Ethyl (S)-3-hydroxybutyrate was the chiral starting material. A Brown asymmetric allylation and an Evans aldol reaction were key steps of the synthesis. The NMR data of the synthetic product are different from those of the natural product. The published structure of feigrisolide A is therefore erroneous. A subsequent comparison
报告了拟合成的粉煤灰A的结构的全合成。(S)-3-羟基丁酸乙酯是手性原料。布朗不对称烯丙基化反应和埃文斯羟醛反应是合成的关键步骤。合成产物的NMR数据与天然产物的NMR数据不同。因此,feigrisolide A的已发布结构是错误的。光谱数据的后续比较有力地表明,粉煤灰固体A和B分别与(-)-非乳酸和(+)-纯乳酸相同。