Stereochemistry of cycloaddition of (S)-N-(1-phenylethyl)-C-diethoxyphosphorylated nitrone with vinyl acetate. Studies on mutarotation of 3-(O,O-diethylphosphoryl)-5-hydroxyisoxazolidines
作者:Dorota G. Piotrowska
DOI:10.1016/j.tetasy.2008.01.009
日期:2008.2
Three enantiomericallypure diethyl 5-acetoxy-2-[(S)-1-phenylethyl]isoxazolidinyl-3-phosphonates were obtained by 1,3-dipolarcycloaddition of the title nitrone and vinyl acetate. Each of them was subsequently transformed into the respective 5-hydroxy derivatives, which exist as equilibrium mixtures of C5-anomers. Detailed mutarotation studies on a 3-(O,O-diethylphosphoryl)-5-hydroxyisoxazolidine system