DFT studies on structure, electronics, bonding nature, NBO analysis, thermodynamic properties, molecular docking, and MM-GBSA evaluation of 4-methyl-3-[2-(4-nitrophenyl)-1,3-dioxo-2,3-dihydro-1H-isoindole-5-amido]benzoic acid: a potent inhibitor of Graves’ disease

Abstract

A calculation analysis on the molecular structure and energy of 4-methyl-3-[2-(4-nitrophenyl)-1,3-dioxo-2,3-dihydro-1H-isoindole-5-amido]benzoic acid (COD30) is carried out with the 6-311G (d,p) basis set by the DFT/RB3LYP method as an anti-graves' disease treatment. The calculated FT-IR spectrum is strongly correlated with the vibrational spectra reported in the literature. To evaluate the entire electron density and organic reactive sites of COD30, molecular electrostatic potential (MEP) and frontier molecular orbitals (FMO) were analyzed. The density of states analysis is used to determine the orbital molecular contributions (DOS and PDOS). In comparison to methimazole (MMI) and propylthiouracil, COD30 showed more encouraging docking results, and it also offered golden binding contacts in addition to an improvement in docking energy (PTU). The outcomes of bioactivity prediction and MD simulation indicate that COD30 could be further developed into an inhibitor of Graves' disease.