The condensation
of phthalic anhydride afforded structurally modified
isoindoline-1,3-dione derivatives with selected amino-containing compounds.
The title compounds (
2
–
30
) have been
characterized by thin-layer chromatography (TLC), infrared spectroscopy,
1
H and
13
C NMR spectroscopy, and mass spectroscopy.
All of the compounds were assessed for their antimycobacterial activity
toward the H37Rv strain by a dual read-out assay method. Among the
synthesized compounds, compound
27
possessed a significant
IC
50
of 18 μM, making it the most potent compound
of the series. The InhA inhibitory (IC
50
) activity of compound
27
was 8.65 μM in comparison to Triclosan (1.32 μM).
Computational studies like density functional theory (DFT) study,
molecular docking, and dynamic simulation studies illustrated the
reactivity and stability of the synthesized compounds as InhA inhibitors.
A quantum-mechanics-based DFT study was carried out to investigate
the molecular and electronic properties, reactivities, and nature
of bonding present in the synthesized compounds and theoretical vibrational
(IR) and isotropic value (
1
H and
13
C NMR) calculations.