研究了乙烯基膦酸酯与硝酮的环加成反应,发现该反应有三个产物,主产物为4-膦酰基-3-芳基-四氢异噁唑,其结构经核磁和元素分析确证;另两个产物的含量经高效液相确定,通过质谱、氢谱比较确定了它们的结构.
Cycloaddition reactions of vinylphosphonates with nitrones were studied. Three products were ob- tained. 4-phosphonyl-3-arylisoxazolidine is main product and its structure was confirmed by 1H NMR and ele- ment analysis. Yield of other products is analysed by HPLC, and their structures are confirmed by 1H NMR and MS.