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