有机化学 ›› 2021, Vol. 41 ›› Issue (9): 3643-3651.DOI: 10.6023/cjoc202105003 上一篇    下一篇

研究论文

苯并咪唑并氮杂糖的结构修饰及其β-葡萄糖苷酶抑制活性

李丰兴, 卢昕, 刘旭, 苏路路, 李小六, 陈华*   

  1. 河北大学化学与环境科学学院 河北省化学生物学重点实验室 河北保定 071002
  • 收稿日期:2021-05-02 修回日期:2021-05-31 发布日期:2021-06-22
  • 通讯作者: 陈华
  • 基金资助:
    国家自然科学基金(21772031); 河北省自然科学基金(B2019201398)

Structural Modification of Benzimidazole-Iminosugars and Their Inhibitory Activities against β-Glycosidases

Fengxing Li, Xin Lu, Xu Liu, Lulu Su, Xiaoliu Li, Hua Chen   

  1. Key Laboratory of Chemical Biology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding, Hebei 071002
  • Received:2021-05-02 Revised:2021-05-31 Published:2021-06-22
  • Contact: Hua Chen
  • Supported by:
    National Natural Science Foundation of China(21772031); Natural Science Foundation of Hebei Province(B2019201398)

源于D-核糖的苯并咪唑并氮杂糖12具有良好的β-葡萄糖糖苷酶抑制活性, 对其苯环部位结构修饰, 通过Mitsunobu反应合成了30个新型苯环不同位置上含单取代基的苯并咪唑并氮杂糖稠合三环衍生物11a~11g, 12a~12g, 13a~13h14a~14h. 测试了新合成化合物对β-葡萄糖糖苷酶(杏仁)的抑制活性. 结果显示, 化合物13e13f14f的混合物对β-葡萄糖糖苷酶(杏仁)表现出优越的酶抑制活性, IC50值分别为0.49和0.25 μmol/L, 活性高于阳性对照米格列醇的酶抑制活性. 构效分析表明, 稠合三环氮杂糖中的六元氮杂糖环形式有利于此类苯并咪唑并氮杂糖三环衍生物的β-葡萄糖苷酶抑制活性. 苯环上3'或4'位连有给电基团, 如甲基、甲氧基等, 将极大地促进化合物的酶抑制活性.

关键词: 稠合三环氮杂糖, Mitsunobu反应, β-葡萄糖苷酶抑制剂, 苯并咪唑

The benzimidazole-fused tricyclic iminosugars 1 and 2 derived from D-ribose inhibited β-glucosidase significantly. On the basis of the structural modification on the phenyl ring of 1 and 2, thirty novel tricyclic iminosugars 11a~11g, 12a~12g, 13a~13h and 14a~14h bearing mono-substituent on the different positions on phenyl ring were synthesized through Mitsunobu reaction. The inhibitory activities of newly synthesized compounds were tested against β-glucosidase (almonds). The results showed that compound 13e and the mixture of 13f and 14f exhibited significantly β-glucosidase inhibitory activities with IC50 values of 0.49 and 0.25 μmol/L, respectively, higher than that of the positive control, miglitol. The analysis of structure activity relationship (SAR) suggested that six-membered iminosugar ring in such fused tricyclic iminosugars was on the benefit of the compounds against β-glucosidase. The electron donor group on the 3' or 4' positions on the phenyl ring, such as methyl or methoxyl, would greatly promote the β-glucosidase inhibitory activities of the inhibitors.

Key words: fused tricyclic iminosugar, Mitsunobu reaction, β-glucosidase inhibitors, benzimidazole