Chinese Journal of Organic Chemistry ›› 2024, Vol. 44 ›› Issue (1): 204-215.DOI: 10.6023/cjoc202307018 Previous Articles     Next Articles

ARTICLES

新型γ-咔啉衍生物的合成及其抑菌活性研究

霍海波a, 李桂霞b, 王世军c, 韩春c, 师宝君d, 李健a,c,*()   

  1. a 长治学院生命科学系 山西长治 046011
    b 长治医学院基础医学部 山西长治 046011
    c 长治学院化学系 山西长治 046011
    d 西北农林科技大学植物保护学院 陕西杨陵 712100
  • 收稿日期:2023-07-17 修回日期:2023-08-31 发布日期:2023-09-15
  • 作者简介:
    共同第一作者.
  • 基金资助:
    国家自然科学基金(82204247); 山西省基础研究计划(202103021223378); 山西省基础研究计划(202103021223382); 山西省基础研究计划(202203021212168); 山西省高校科技创新(2022L510)

Novel γ-Carboline Derivatives as Antibacterial Agents: Synthesis and Antibacterial Evaluation

Haibo Huoa, Guixia Lib, Shijun Wangc, Chun Hanc, Baojun Shid, Jian Lia,c()   

  1. a Department of Life Sciences, Changzhi University, Changzhi, Shanxi 046011
    b Department of Basic Medicine, Changzhi Medical College, Changzhi, Shanxi 046011
    c Department of Chemistry, Changzhi University, Changzhi, Shanxi 046011
    d College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100
  • Received:2023-07-17 Revised:2023-08-31 Published:2023-09-15
  • Contact: *E-mail: lijian3773@163.com
  • About author:
    The authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China(82204247); National Natural Science Foundation of Shanxi Province(202103021223378); National Natural Science Foundation of Shanxi Province(202103021223382); the National Natural Science Foundation of Shanxi Province(202203021212168); Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province(2022L510)

Forty-five novel 8-methoxyl-γ-carboline derivatives were designed and effectively synthesized with commercially available starting materials, 4-methoxyphenylhydrazine hydrochloride 7 and piperidone 8, via Fischer indole synthesis process to prepare key intermediate 9, which underwent oxidation, acylation or alkylation to yield the target derivatives. The antibacterial activities of all compounds were evaluated against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa) and Ralstonia solanacearum (R. solanacearum). The results indicated that (8-methoxy-5H- pyrido[4,3-b]indol-5-yl)(4-methoxyphenyl)methanone (11g), furan-2-yl(8-methoxy-5H-pyrido[4,3-b]indol-5-yl)methanone (11n), 5-(2-bromobenzyl)-8-methoxy-5H-pyrido[4,3-b]indole (12f), 5-(3-bromobenzyl)-8-methoxy-5H-pyrido[4,3-b]indole (12g), 8-methoxy-5-(4-(trifluoromethoxy)benzyl)-5H-pyrido[4,3-b]indole (12h) and 2-(4-chlorobenzyl)-8-methoxy-5H-pyri- do[4,3-b]indol-2-ium bromide (13e) showed a broad spectrum of antibacterial activity. Especially compounds 12f and 12h exhibited comparable antibacterial activity with the positive control (ampicillin sodium) with minimum inhibitory concentration (MIC) value of 8 μg/mL. Moreover, membrane-active mechanism was studied further via fluorescent microscopy, which suggested that derivative 12h exerted its antibacterial effect by damaging the membranes of the bacteria. Some structure-activity relationships among the forty-five derivatives are discussed and several important determinants for the activity of these compounds are identified. This work offers useful instructions for the development of new antibiotics.

Key words: 8-methoxyl-N2 &, N5-substituted γ-carbolines, antibacterial activity, structure-activity relationships, mechanism