1,3-Dipolar cycloaddition reactions of acyl phosphonates with nitrile oxides: synthesis of phosphonate-containing dioxazole derivatives
作者:Sidika Polat-Cakir
DOI:10.1080/10426507.2020.1854259
日期:2021.5.4
1,3-dipolar cycloaddition reactions of nitrile oxides used as dipole with acyl phosphonates under basic conditions. Herein, acyl phosphonates take part in the cyclization process as a dipolarophile to afford the related dioxazole compounds in moderate-to-good yields (49–84%). Substituted aryl nitrile oxides and aroyl phosphonates were employed in the 1,3-dipolar cycloaddition reactions where triethylamine
摘要 新的含膦酸酯的五元杂环二恶唑衍生物是通过在碱性条件下用作偶极的腈氧化物与酰基膦酸酯的1,3-偶极环加成反应合成的。在此,酰基膦酸酯以双极性亲和性参与环化过程,以中等至良好的收率(49-84%)提供相关的二恶唑化合物。取代的芳基腈氧化物和芳酰基膦酸酯用于1,3-偶极环加成反应中,其中三乙胺是有效的叔碱。酰基膦酸酯的烷基形式也提供了预期的环加合物,即5-异丙基-3-苯基-3-苯基-1,4,2-二恶唑-5-基-5-膦酸二甲酯。二/二甲基3,5-芳基-1,4,2-二恶唑-5-基-5-膦酸酯衍生物充分特征在于,使用1 H NMR,13C NMR,31 P-NMR和FT以及高分辨率质谱。