Design, Synthesis and Proposed Antibacterial–Antifungal Evaluation of Novel Indole-Based Heterocyclic Derivatives

Abstract

The growing incidence of antimicrobial resistance has created an urgent need for the development of new 
antibacterial and antifungal agents. Indole is a privileged heterocyclic scaffold that exhibits diverse 
biological activities and serves as an important building block in medicinal chemistry. In this   study, a series 
of    indole-based heterocyclic derivatives were designed by molecular hybridization with biologically active 
heterocyclic rings such as triazole, oxadiazole and thiazole. Standard synthetic routes involving Schiff base 
formation, cyclization and functional group modification are described as an example methodology. The 
proposed compounds would be characterized using Fourier Transform Infrared Spectroscopy (FTIR), Proton 
Nuclear Magnetic Resonance (¹H NMR), Carbon-13 Nuclear Magnetic Resonance (¹³C NMR), Mass 
Spectrometry and elemental analysis. Their antimicrobial potential would be evaluated against 
representative Gram-positive bacteria, Gram-negative bacteria and pathogenic fungi using broth 
microdilution and agar diffusion methods. Molecular docking against bacterial DNA gyrase and fungal 
CYP51 is proposed to investigate ligand–protein interactions. This example demonstrates the structure and 
presentation of a medicinal chemistry research article while emphasizing the importance of experimental 
validation.