Synthesis of C3-substituted Indoles in water and their anti-bacterial activities

Thangjam Linda Devi , Mayanglambam Maneeta Devi , Kistu Singh Nongthombam , Thokchom Prasanta Singh , Okram Mukherjee Singh
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引用次数: 0

Abstract

A series of novel C3-substituted indole derivatives containing a pyridine moiety (5a–i) were successfully synthesized through multi-component reactions. The synthesis involved 3-acetylindole, various aldehydes, ethyl cyanoacetate, and ammonium acetate, with water as the solvent and NaOH as the catalyst. This method proved advantageous, offering a straightforward experimental procedure, reduced reaction times, and favorable yields, all while maintaining substrate diversity and operational simplicity under metal-free conditions for forming C–C/C–N bonds. The agar-well diffusion method's anti-bacterial activities were carried out for the synthesized compounds. It was found that 5a has shown the highest anti-bacterial activity with the lowest MIC value of 12.50 µg/mL against Escherichia coli.
水中c3 -取代吲哚的合成及其抑菌活性
通过多组分反应,成功合成了一系列新型的含有吡啶部分(5a-i)的c3取代吲哚衍生物。以水为溶剂,氢氧化钠为催化剂,合成了3-乙酰吲哚、各种醛、氰乙酸乙酯和乙酸铵。事实证明,该方法具有优势,实验过程简单,反应时间短,产率高,同时在无金属条件下形成C-C / C-N键时保持底物多样性和操作简单性。用琼脂孔扩散法对合成的化合物进行抑菌活性测定。结果表明,5a对大肠杆菌的抑菌活性最高,MIC值最低,为12.50 µg/mL。
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