高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (12): 1969.

• 论文 • 上一篇    下一篇

有机磷杂环化合物研究(Ⅷ)──Lawesson试剂与合两个氨基的底物的成环反应

何良年1, 陈茹玉2, 卓仁禧1   

  1. 1. 武汉大学化学系, 武汉 430072;
    2. 南开大学元素有机化学研究所, 天津 300071
  • 收稿日期:1997-01-27 出版日期:1997-12-24 发布日期:1997-12-24
  • 通讯作者: 何良年, 男, 32岁, 博士后.
  • 作者简介:何良年, 男, 32岁, 博士后.
  • 基金资助:

    国家自然科学基金;武汉市青年科技晨光计划资助

Studies on Organophosphorus Heterocycles (Ⅷ)─Cyclization of Lawesson's Reagent with the Bifunctional Substrates Containing Two Amino Groups

HE Liang-Nian1, CHEN Ru-Yu2, ZHOU Ren-Xi1   

  1. 1. Department of Chemistry, Wuhan University, Wuhan 430072;
    2. Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071
  • Received:1997-01-27 Online:1997-12-24 Published:1997-12-24

摘要: 研究Lawesson试剂与含有两个氨基的底物的成环反应,合成了N-P-N型五元、六元磷杂环3a-3b、sa-5b及8a-8b,并讨论了成环机理.初步的生测结果表明,所合成的磷杂环具有一定的除草活性,因此LR的成环反应是合成具有生物活性的磷杂环的新方法.

关键词: Lawesson试剂, 磷杂环, 成环反应, 除草活性

Abstract: The cyclization of Lawesson's reagent with the bifunctional cornpounds containing two amino groups has been studied.Lawesson' s reagent reacted with 1, 2-diamines 2a-2b,1, 2-phosphinodiamides 7a-7b, and 1, 3-diamines 4a-4b in anhydrous toluene at 110℃ togive the "N-P-N" type 5-membered phosphorus heterocycles 3a-3b, 1, 3, 2, 4-di-azadiphospholidines (8a-8b) and 6-membered rings 5a-5b, respectively.In addition, LRwas treated with 1, 2, 4-triazoles at 100℃ in toluene to from cyclic compounds containingphosphorus.However, LRreacted with oximide at refluxing temperature in dry acetonitrileto give dithiooxamide, a O-Sexchange product of carbonyl, instead of the expected productformed as a result of heterocyclization.As to the formation of cyclizational products, one canassume that the electrophilic center of phosphorus of the monmetric part of LRcould attackthe nucleophilic center namely the amino group of the bifunctional substates, to form adithiophosphonamide which looses hydrogen sulfide to yield phosphorus heterocycles.Theresult of preliminary bloassays shows that all heterocycles prepared by cyclization with LRhave selective herbicidal activity.So the cyclization with Lawesson's reagent is a novel routeleading to biological active heterocycles.

Key words: Lawesson's reagent, Phosphorus-heterocycles, Cycllzation, Herbicidal activity

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