A Convenient Synthesis of Phosphorines and Phospholidins by <Emphasis Type="Italic">Lawesson</Emphasis>’s Reagent and Microwave Irradiation

Summary. A new and simple method for the synthesis of 1,3,2-diazaphosphorines and 1,3,2-oxazaphosphorine was developed based on the reactions of Lawessons reagent with -aminopropionitriles and -hydroxypropionitrile. In addition, a rapid and facile synthesis of 1,3,2-diazaphospholidin-4-ones by the reaction of P(NEt₂)₃ with hindered diamino substrates under microwave irradiation was also achieved. The prepared phosphorines show herbicidal activity to some extent in the preliminary bioassays.     

1,4—二苯基—2—苯氧基—1,4,2—二氮磷杂环戊—5—酮的合成及其除草活性研究

利用１，３－二苯基脲与亚磷酸三苯酯和取代苯甲醛进行的类Ｍａｎｎｉｃｈ反应合成了１，４－二苯基－２－苯氧基－１，４，２－二氮磷杂环戊－５－酮（２），所有新化合物的结构均经元素分析、ＮＭＲ、ＭＳ证实。对目标化合物进行的除草活性测试结果表明，２对阔叶杂草具有较好的选择性除草活性。     

1-芳基-2-苯基-3-甲基-3-异丙基-2-氧代-1,4,2-二氮磷杂环戊-5-酮的合成及除草活性

利用取代苯基脲与苯基二氯化膦和3-甲基-2-丁酮进行的类Mannich反应合成了15种新的1,4,2-二氮磷杂环戊-5-酮类化合物(2a_2o), 其结构经