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2‐Aminoaryl‐3,5‐diaryl pyrazines: Synthesis, biological evaluation against Mycobacterium tuberculosis and docking studies
Author(s) -
Gangarapu Nagaraja Reddy,
Ranganatham Archakam,
Reddy Eeda Koti,
Yellappa Shivaraj,
Chandrasekhar Kothapalli Bannoth
Publication year - 2020
Publication title -
archiv der pharmazie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.468
H-Index - 61
eISSN - 1521-4184
pISSN - 0365-6233
DOI - 10.1002/ardp.201900368
Subject(s) - mycobacterium tuberculosis , chemistry , docking (animal) , stereochemistry , potency , hydrogen bond , enzyme , cytotoxicity , ic50 , in vitro , combinatorial chemistry , biochemistry , tuberculosis , organic chemistry , medicine , nursing , pathology , molecule
Rationally designed Mycobacterium tuberculosis (Mtb) inhibitors were synthesized under Buchwald conditions using Pd 2 (dba) 3 /xantphos and the compounds were investigated for their biological activity against the Mtb standard strain H37Rv and two other clinically isolated multidrug‐resistant strains with different drug resistance patterns. Compounds 5e , 6e , 7e , and 8e exhibited excellent antituberculosis activity against H37Rv with a minimum inhibitory concentration (MIC) value of 15 μg/ml. Compounds 5a , 6c , 7b , 8a , 8b , and 8d also displayed their potency with a MIC value in the range of 15–25 μg/ml. In addition to the Mtb studies, compounds 4e , 5e , 7e , and 8e were tested for cytotoxicity on HEK‐293 cells and compounds 7e and 8e were identified to have low toxicities of up to 200 and 300 μM, respectively. The synthesized compounds docked with the 2FUM protein of Mtb and the docking studies revealed that compounds 5e , 6e , 7e , and 8e can bind strongly in the active site of the enzyme and showed binding energies of −9.62, −10.7, −11.48, and −12.06 kcal/mol, respectively. Compound 7e forms four hydrogen bonds, whereas compound 8e forms five hydrogen bonds with amino acids, respectively. Based on these results, compounds 7e and 8e might be considered potential lead compounds with good anti‐Mtb potency.