4692-94-8Relevant articles and documents
Virtual screening of some heterocyclic structures toward novel antibacterial agents
Hosseini, Zahra S.,Housaindokht, Mohammad Reza,Razzaghi-Asl, Nima,Miri, Ramin
, p. 621 - 628 (2018)
Infectious diseases and their treatment are among the most important issues in global health and economy. Moreover, increasing prevalence of antibiotic-resistant pathogenic bacteria necessitates the considerable need for discovering new drugs. Some heterocyclic structures with dihydropyridine (DHP) scaffold have been reported as antimicrobial agents. Herein, we report a structure-based virtual screening of a pool of 3,5-disubstituted DHPs and a post-analysis of virtual hits through in vitro antibacterial assessment. Four top-ranked DHP structures (6a–d) were found to interact with the relevant target active sites and exhibited superior stereoelectronic features within their enzyme inhibition. Selected compounds were synthesized and assessed for their antibacterial activity via microdilution method. Results of this study represented a significant application of multi-step virtual screening strategy in identifying privileged DHP structures as good starting points for further developments toward more potent antibacterial agents.
3,4-Dihydropyrimidin-2(1H)-one C5 amides as inhibitors of T NFα production: Synthesis, biological evaluation and molecular modeling
Ebadi, Ahmad,Khoshneviszadeh, Mehdi,Javidnia, Katayoun,Ghahremani, Mohammad Hossein,Firuzi, Omidreza,Miri, Ramin
, p. 885 - 897 (2017/08/26)
Background: Regulation of pro-inflammatory cytokines especially TNFα can have therapeutic effects in inflammatory diseases and this approach has attracted much attention for drug discovery for diseases such as rheumatoid arthritis. Objective: In the present contribution, 16 derivatives of 3,4-dihydropyrimidin-2(1H)-one(thione) C5 amide were synthesized and their anti-inflammatory activities were investigated. Methods: We synthesized 3,4-dihydropyrimidin-2(1H)-one(thione) C5 amide derivatives according to Biginelli method. Inhibitory effect of newly synthesized derivatives was evaluated on TNF-α production in lipopolysaccharide-stimulated peripheral blood mononuclear cells (PBMCs). Results: Most of these compounds demonstrated good inhibition of TNF-α production in lipopolysaccharide-stimulated peripheral blood mononuclear cells (PBMCs). Compounds 6k and 6c showed the highest levels of TNFα inhibition (74.9% and 72.2% at 50 μM, respectively). Molecular modeling study revealed that compound 6k formed a stable complex with the active site of p38α MAPK. Conclusion: The common structural feature of two most potent compounds was the presence of 6- ethoxybenzothiazol moiety on the carbamoyl group at position 5 of the DHPM ring. The findings of this study provide evidence that DHPM derivatives might be considered as promising compounds for the discovery of novel anti-cytokine agents. Amino acid decomposition analysis showed that DHPM scaffold had essential pharmacophore components of p38α MAPK inhibitors.
Development of selective DprE1 inhibitors: Design, synthesis, crystal structure and antitubercular activity of benzothiazolylpyrimidine-5-carboxamides
Chikhale, Rupesh,Menghani, Sunil,Babu, Ramavath,Bansode, Ratnadeep,Bhargavi,Karodia, Nazira,Rajasekharan,Paradkar, Anant,Khedekar, Pramod
, p. 30 - 46 (2015/04/22)
Decaprenylphosphoryl-b-d-ribose 20-epimerase (DprE1) is a potential drug target for development of antitubercular agents. Structure based drug discovery approach yielded twenty novel derivatives of benzothiazolylpyrimidine-5-carboxamides (7a-t) which were synthesised by three component one pot reaction involving benzothiazolyl oxobutanamide, thiourea and substituted aromatic benzaldehydes. These derivatives were evaluated for antitubercular activity to determine MIC and compound 7a, 7e, 7f and 7o were found to be potentially active against Mycobacterium tuberculosis (H37Rv). Log P of these compounds was found to be between 2.0 and 3.0 making them suitable for oral dosing. DprE1 selectivity and pharmacokinetic studies were carried out for these compounds of which 7a and 7o were found to be highly selective and bioavailability was found to be above 52% by oral dose. Crystal structure of 7a was studied and molecular packing was determined, it exhibited a triclinic crystal lattice arrangement having hydrogen bonded dimeric arrangement. Drug receptor interactions were studied which exhibited docking in the active site of receptor with hydrogen bonding, hydrophobic interactions, vdW interactions with amino acid residues such as Cys387, Asn385, Lys418, Tyr314, Gln334 and Lys367 respectively. 3D QSAR analysis was carried out by kNN-MFA method to determine and develop theoretical model, best suitable model was found to be based on Simulated Annealing k-Neariest Neighbour Molecular Field Analysis (SA kNN-MFA). The model provided with hydrophobic descriptors in positive side indicating the need of bulky groups, steric and electronegative descriptors in negative coordinates hints with contribution by the electronegative substitutions as favourable and desirable moieties for enhancing the activity. The q2, q2-se and Pred-r2se were found to be 0.5000, 0.6404 and 1.0094 respectively. A pharmacophore model was generated which suggested for necessity of aromatic, aliphatic carbon centre and hydrogen bond donor for development of newer DprE1 selective inhibitors.
