为了阐明它们的行为,在气相中在电子电离(EI)条件下研究了一些3-糖基-5-芳基-2-异恶唑啉。这些衍生物显示出有趣的重排,涉及杂环的开环和同时的闭环以提供新的异恶唑啉衍生物。该反应的第一步是较不常见的杂环C(5)-O键裂解。5-芳基取代基负责新异恶唑啉衍生物的假苄基稳定作用。EI串联质谱和EI高分辨率质谱可以阐明碎裂途径。版权所有1999 John Wiley&Sons,Ltd.
Synthesis of 3-glycosyl-5-substituted-2-isoxazolines
作者:Mirta L. Fascio、Norma B. D'Accorso
DOI:10.1002/jhet.5570330604
日期:1996.11
The synthesis of eight 3-glycosyl-5-substituted-2-isoxazolines is described. They are obtained by 1,3-dipolar cycloaddition from some 2-deoxy-sugar oximes. A side product was isolated. The physical and spectroscopycal characterization of all compounds are reported.
behavior. These derivatives showed an interesting rearrangement involving opening of the heterocyclic ring with a concomitant ring closing to afford a new isoxazoline derivative. The first step of this reaction was the less common cleavage of the heterocyclic C(5)-O bond. The 5-aryl substituent was responsible for the pseudobenzylic stabilization of the new isoxazoline derivative. EI tandem mass spectrometry
为了阐明它们的行为,在气相中在电子电离(EI)条件下研究了一些3-糖基-5-芳基-2-异恶唑啉。这些衍生物显示出有趣的重排,涉及杂环的开环和同时的闭环以提供新的异恶唑啉衍生物。该反应的第一步是较不常见的杂环C(5)-O键裂解。5-芳基取代基负责新异恶唑啉衍生物的假苄基稳定作用。EI串联质谱和EI高分辨率质谱可以阐明碎裂途径。版权所有1999 John Wiley&Sons,Ltd.