Preparation of γ oxo-α-amino acids from silyl enol ethers and glycine cation equivalents; a facile synthesis of (±)-5-hydroxy.4.Oxonorvaline (HON)
作者:Hendrik H. Mooiweer、Kirsten W.A. Ettema、Henk Hiemstra、W. Nico Speckamp
DOI:10.1016/s0040-4020(01)88390-3
日期:1990.1
The synthesis of a series of N-methoxycarbonyl γ-oxo-α-amino acid methyl esters through Lewis acid-induced coupling of the corresponding chloroglycine derivative with different silyl enol ethers is described. The products can be easily converted into the free α-amino acids, as is illustrated for the synthesis of 5-hydroxy-4-oxonorvaline (HON), a natural product with antitubercular and antifungal properties
描述了通过路易斯酸诱导的相应的氯甘氨酸衍生物与不同的甲硅烷基烯醇醚的偶联,合成一系列的N-甲氧基羰基γ-氧代-α-氨基酸甲酯。该产物可以很容易地转化为游离的α-氨基酸,如合成5-羟基-4-氧杂缬氨酸(HON)所示,这是一种具有抗结核和抗真菌特性的天然产物。