Interconversion of (R) and (S)-α-hydroxy esters: precursors of (S) and (R)-o-benzyl-α-hydroxylamino acid esters of high optical purity
作者:R.W. Feenstra、E.H.M. Stokkingreef、R.J.F. Nivard、H.C.J. Ottenheijm
DOI:10.1016/s0040-4020(01)86063-4
日期:1988.1
(R)- and (S)-α-hydroxy esters 5 are interconverted via their triflates 6 in high chemical as well as optical yields by reaction with dimethylformamide. The same triflates are efficiently converted into N-hydroxy-α-amino acid derivatives 7 of high optical purity.
(R)-和(S)-α-羟基酯5通过它们的三氟甲磺酸酯6与二甲基甲酰胺反应以高化学产率和光学产率被转化。相同的三氟甲磺酸酯被有效地转化为高光学纯度的N-羟基-α-氨基酸衍生物7。