In this study, the interaction between human immunodeficiency virus reverse transcriptase and methyldiarylpyrimidines containing a hydroxyimino, hydrazine, hydroxyl, cyclopropylamino, cyano or chloro etc. substituent was studied by molecular docking simulation, molecular docking was accomplished with AutoDock4.2 and absorption, distribution, metabolism, excretion and toxicity-structure-activity relationship and Swiss absorption, distribution, metabolism and excretion servers were used to predict the pharmacokinetics and absorption, distribution, metabolism, excretion and toxicity properties of all compounds. As a result, molecular docking analysis revealed that there are extensive interactions between the diarylpyrimidine derivatives and Lys101, Tyr188, Val179, Lys103, Glu138, Leu234, Phe227 and Trp229 residues in the active site of human immunodeficiency virus-1 reverse transcriptase. The formation of hydrogen bonds between diarylpyrimidines and the residues Lys101 and Glu138 play important roles in inhibiting the activity of human immunodeficiency virus. All compounds respect the conditions mentioned in Lipinski's rule and have acceptable absorption, distribution, metabolism, excretion and toxicity properties. The preliminary structure-activity relationship was also investigated. A preliminary structureactivity relationship analysis of these target molecules highlighted a preference for the smaller or more flexible group's substitution in the linker between the left ring and the pyrimidine skeleton for enhancing the anti-human immunodeficiency virus-1 activity. The acrylonitrile C 4 -substituent substantially improved the potency against wild-type human immunodeficiency virus-1 and several mutant strains, and the 2 nd position is the most preferred position to improve antiviral activity. This information might be helpful for further diarylpyrimidine optimizations.
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