有机化学 ›› 2022, Vol. 42 ›› Issue (7): 2164-2171.DOI: 10.6023/cjoc202201020 上一篇    下一篇

研究论文

新型喹唑啉酮衍生物的设计合成与抗植物病原真菌活性研究

陈伟*(), 雷思敏, 兰雨欣, 许豪键, 余坪槟, 张锐, 吴润, 陈阳   

  1. 西南交通大学生命科学与工程学院 四川省天然药物仿生合成工程研究中心 成都 610031
  • 收稿日期:2022-01-14 修回日期:2022-03-02 发布日期:2022-08-09
  • 通讯作者: 陈伟
  • 基金资助:
    国家自然科学基金(21702173); 四川省科技计划(2021YJ0481)

Design, Synthesis and Antifungal Activities of Novel Quinazolinone Derivatives

Wei Chen(), Simin Lei, Yuxin Lan, Haojian Xu, Pingbin Yu, Rui Zhang, Run Wu, Yang Chen   

  1. Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031
  • Received:2022-01-14 Revised:2022-03-02 Published:2022-08-09
  • Contact: Wei Chen
  • Supported by:
    National Natural Science Foundation of China(21702173); Science Technology Program of Sichuan Province(2021YJ0481)

为寻找新型高效的绿色杀菌剂先导化合物, 以喹唑啉酮为药效母核, 通过活性药效团拼合, 设计合成了19个新颖的1-芳酰基-2-芳基-3-乙基喹唑啉-4(1H)-酮衍生物7. 目标分子经1H NMR、13C NMR和HRMS进行确认, 并评价了其抗植物病原真菌活性. 初步离体抑菌活性显示, 在50 mg/L浓度下, 目标化合物对6种受试真菌均具有较良好的抑制效果. 其中, 7a对小麦赤霉病菌和玉米纹枯病菌的EC50分别为12.727和12.413 mg/L, 优于阳性对照百菌清(14.323和13.339 mg/L). 分子表面静电势研究显示, 7a中酰胺键周围的静电势为负值, 易与受体中带正电的氨基酸残基产生作用. 以上结果为新型喹唑啉酮类杀菌剂先导的开发提供了新的研究思路.

关键词: 喹唑啉酮, 喹唑啉酮生物碱, 酰胺, 抗真菌活性, 分子表面静电势

Plant pathogenic fungi have caused enormous yield and economic losses in agricultural production. In order to discover effective antifungal agents, a series of 19 novel quinazolinone derivatives 7 were designed and synthesized based on molecular splicing approach. The classical pharmacophore of amide was introduced into N-1 of quinazolinone skeleton. The structures were confirmed by 1H NMR, 13C NMR and HRMS. Preliminary in vitro antifungal test showed that the target compounds exhibited moderate to favorable activities against six kind of plant pathogenic fungi at the concentration of 50 mg/L. Compound 7a had significant inhibitory effects on Fusarium graminearum and Rhizoctonia solani with EC50 of 12.727 and 12.413 mg/L, respectively, which were better than chlorothalonil (14.323 and 13.339 mg/L). Molecular electrostatic potential of 7a indicated that the amide moieties located in the negative potential region and might generate hydrogen bond with target amino acid residue. The above results provided an effective strategy for the development of quinazolinone antifungal agents.

Key words: quinazolinone, quinazolinone alkaloids, amide, antifungal activity, molecular electrostatic potential