有机化学 ›› 2019, Vol. 39 ›› Issue (7): 2026-2034.DOI: 10.6023/cjoc201812019 上一篇    下一篇

研究论文

基于Strecker反应的含氰基多取代吡唑的合成及生物活性研究

苏诗淼a, 朱墨b, 张大强a, 袁德凯a   

  1. a 中国农业大学理学院应用化学系 北京 100193;
    b 首都师范大学化学系 北京 100048
  • 收稿日期:2018-12-11 修回日期:2019-02-28 发布日期:2019-03-21
  • 通讯作者: 袁德凯 E-mail:yuandekai@cau.edu.cn,yuandekai@aliyun.com
  • 基金资助:

    国家自然科学基金(No.20902107)资助项目.

Synthesis and Biological Activity Study of Novel Cyano-containing Multi-substituted Pyrazoles Obtained via Strecker Reaction

Su Shimiaoa, Zhu Mob, Zhang Daqianga, Yuan Dekaia   

  1. a Department of Applied Chemistry, Science College, China Agricultural University, Beijing 100193;
    b Department of Chemistry, Capital Normal University, Beijing 100048
  • Received:2018-12-11 Revised:2019-02-28 Published:2019-03-21
  • Contact: 10.6023/cjoc201812019 E-mail:yuandekai@cau.edu.cn,yuandekai@aliyun.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 20902107).

为探索多取代吡唑胺的Strecker反应及含氰基吡唑化合物的生物活性,首次实现了ZnI2催化下多取代吡唑胺、三甲基硅腈(TMSCN)和醛的Strecker反应,初步探索了反应条件及醛底物的范围.共获得20个全新含氰基多取代吡唑目标物,最高收率为93.5%,并通过核磁共振氢谱(1H NMR)、碳谱(13C NMR)和高分辨质谱(HRMS)确证了其结构.活性测试表明,10×10-3 g/L浓度下,13个化合物对蚊幼虫活性为100%,5×10-3 g/L浓度下4个化合物活性高于40%;在500×10-3 g/L浓度下10个化合物对黏虫体现一定活性.在500×10-3 g/L浓度下5个化合物对烟草花叶病毒具有一定钝化活性,最高活性为31.8%,4个化合物则具有保护活性,最高活性为28.3%.在50×10-3 mg/mL浓度下,3个化合物对瓜果腐霉菌、芦笋茎枯菌、辣椒疫霉菌、水稻纹枯菌等显示一定抑制活性,其中4-[(1-氰基十二烷基)氨基]-5-乙基-N-甲基-1H-吡唑-3-甲酰胺(3t)对辣椒疫霉活性达62.3%.这表明氨基邻位具有大位阻基团的吡唑胺底物能顺利发生Strecker反应,含氰基吡唑类目标物显示多样的生物活性,具有一定的研究价值.

关键词: 多取代吡唑-4-胺, Strecker反应, ZnI2, 含氰基多取代吡唑, 杀虫活性, 抗烟草花叶病毒活性, 杀菌活性

In order to study the Strecker reaction of multi-substituted amino armorotic heterocycles and the biological activity of the target compounds, the reaction of 3,5-disubstituted pyrazole-4-amine, TMSCN and aldehydes was realized for the first time by the catalysis of anhydrous ZnI2 with 4Å molecular seive. The reaction condition was preliminarily optimized and the substrate scop of aldehydes was studied. 20 target compounds of cyano-containing multi-substituted pyrazoles were obtained with the highest yield of 93.5%, and the sturctures of the compounds were confirmed via 1H NMR, 13C NMR and HRMS methods. Priliminary bioassay of the target compounds showed that 13 target compounds possessed 100% larvicidal activity against mosquito at a concentration of 10×10-3 g/L, and four compounds possessed over 40% larvicidal activity at 5×10-3 g/L, and 10 compounds poccessed weak larvicidal activity against army worm at 500×10-3 g/L with the highest activity of 40%; five compounds were confirmed poccessed good inactivation activity against tobacco mosaic virus (TMV) in vivo with the highest inhibition rate of 31.8%, and four compounds possessed moderate host-protection activity against TMV in vivo with the highest rate of 28.3%; in addition, at a concentration of 50×10-3 g/L, three compounds showed moderate fungicidal activity against Pythium aphanidermatum, Phomopsis asparagi, Phytophora capsic and Rhizoctonia solani in vitro. 4-((1-cyanododecyl)amino)-5-ethyl-N-methyl-1H-pyrazole-3-carboxamide (3t) possessed the highest activity against Phytophora capsic of 62.3%. All the results showed that 3,5-disubstitued pyrazole-4-amine could undergo Strecker reaction smoothly, and this study gave a useful example to explore the Strecker reaction of other multi-substituted aromatic hetreocyclic amines. Additionally, the larvicidal and anti-TMV activity of the target compounds gave some clues in design cyano-containing biological heterocycles.

Key words: multi-substituted pyrazole-4-amine, Strecker reaction, anhydrous ZnI2, cyano-containing pyrazoles, larvicidal activity, anti-TMV activity, fungicidal activity