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Mannich反应合成3,6(8)-二取代-2,4-二氢-1,3-苯并噁嗪及其杀菌活性

唐子龙1,2,3*,夏赞稳1,马红伟1,刘汉文1,2,3,欧晓明2,4   

  1. (1.湖南科技大学化学化工学院 湘潭 411201;
    2.湖南科技大学理论化学与分子模拟省部共建教育部重点实验室 湘潭 411201;
    3.湖南科技大学分子构效关系湖南省高校重点实验室 湘潭 411201;
    4.湖南化工研究院国家农药创制工程技术研究中心 长沙 410014)
  • 收稿日期:2012-11-06 修回日期:2013-01-14 出版日期:2013-09-10 发布日期:2013-09-10
  • 通讯作者: 唐子龙,教授; Tel:0731-8290187; Fax:0731-8290509; E-mail:zltang67@yahoo.com.cn; 研究方向:有机合成,农药化学,药物化学
  • 基金资助:
    国家自然科学基金资助项目(21042011),国家科技支撑计划项目子课题(2011BAE06B01),湖南省教育厅重点项目(10A034),理论化学与分子模拟省部共建教育部重点实验室开放基金课题(LKF1103)

Synthesis of 3,6 (8)-Disubstituted -2,4-Dihydro-1,3-benzoxazines via Mannich Reaction and Their Fungicidal Activity

TANG Zilong1,2,3*, XIA Zanwen1, MA Hongwei1, LIU Hanwen1,2,3, OU Xiaoming2,4   

  1. (1.School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;
    2.Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education,
    Hunan University of Science and Technology,Xiangtan 411201,China;
    3.Hunan Provincial University,Key Laboratory of QSAR/QSPR Hunan University of Science and Technology,Xiangtan 411201,China;
    4.National Engineering Research Center for Agrochemicals,Hunan Research Institute of Chemical Industry,Changsha 410014,China)
  • Received:2012-11-06 Revised:2013-01-14 Published:2013-09-10 Online:2013-09-10
  • Contact: Tang

摘要: 以取代苯酚、多聚甲醛和取代苯胺为原料,在无催化剂的条件下,通过Mannich缩合反应合成了一系列新型3,6(8)-二取代-2,4-二氢-1,3-苯并噁嗪类化合物。 结果表明,取代苯酚和取代苯胺的取代基为供电子基时,合成产物的产率高于吸电子取代基的。 产物的结构用1H NMR、13C NMR、IR和MS等进行了表征。 初步测试了目标化合物的杀菌活性,部分化合物具有较好的杀菌活性。 当浓度为25 mg/L时,化合物4j和4d对菌核病菌的抑制率分别为86.1%和81.5%,化合物4i对灰霉病菌的抑制率为81.6%。

关键词: 二取代-二氢-苯并噁嗪, 合成, Mannich反应, 杀菌活性

Abstract: A series of novel 3,6(8)-disubstituted 2,4-dihydro-1,3-benzoxazines was synthesized by Mannich reactions of substituted anilines with paraformaldehyde and substituted phenols in the absence of catalyst. The results show that substituted phenols and anilines with electron-donating groups on the phenyl ring give higher yields than those with electron-withdrawing groups. The structures of the products were characterized by 1H NMR, 13C NMR, IR and MS. The fungicidal activity of the title compounds was preliminarily evaluated. Compounds 4j and 4d show 86.1% and 81.5% activity against Sclerotonia sclerotiorum at the concentration of 25 mg/L, respectively. Compound 4i exhibits 81.6% activity against Botrytis cinerea.

Key words: disubstituted-dihydro-benzoxazines, synthesis, Sterilization Activity

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