利用 P( NEt2 ) 3 与双酰胺类化合物在干馏条件下的环缩合反应合成了一系列含双芳氧乙酰基的新型五元磷杂环 ,对所合成的化合物进行了元素分析和谱学表征 .初步生物活性测定表明 ,部分化合物具有优良的选择性除草活性 .合成中首次发现此类磷杂环的 P Se与 P—Se的转化现象 ,通过 X射线单晶衍射确证了产物的结构 ,并发现产物分子间氢键的存在 A series of novel five-membered phosphorus heterocycles containing bis-aryloxyacetyl were synthesized by ring-closure reaction of bis (N, N) 2 with bisamide compounds under dry distillation. The synthesized compounds were characterized by elemental analysis and spectral analysis The preliminary bioassay showed that some of the compounds exhibited excellent selective herbicidal activities.The transformation of P Se and P-Se was firstly found in the synthesis of these phosphacycles and the structure of the product was confirmed by X-ray single crystal diffraction The existence of hydrogen bonds between the product molecules was found