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El-Saghier AM, Abdul-Baset A, El-Hady OM, El-Raheem WMA, Kadry AM. Synthesis, docking and characterization of some novel 5-(S-alkyl)-1.3.4-thiadiazole-2-carboxamide derivatives as anti-inflammatory and antibacterial agents. BMC Chem 2024; 18:138. [PMID: 39068479 PMCID: PMC11282722 DOI: 10.1186/s13065-024-01237-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 06/28/2024] [Indexed: 07/30/2024] Open
Abstract
Because of the great pharmacological and industrial significance of 1,3,4-thiadiazole and its related compounds, researchers are still very interested in them. For this reason, in this study, we looked at ways to create new hybrid compounds containing carboxamide and 1,3,4-thiadiazole moieties. The thioxoacetamide derivatives used to make these compounds were reacted with various alkylated reagents to produce multiple S-alkyl groups. Additionally, these compounds were reacted with aldehydes to form novel derivatives known as 5-(substituent)-N-phenyl-1,3,4-thiadiazole-2-carboxamide. Here, we used the agar well diffusion method to examine the antibacterial activity of all the produced compounds against a few pathogenic bacteria that were resistant to multiple drugs. Additionally, look into their capacity to lower inflammation through the use of bovine serum albumin in the protein denaturation procedure. The substances were characterized by spectral analysis (IR, 1HNMR, 13CNMR and Elemental Analysis), and efficient as antibacterial agents against all the tested bacterial strains, except for Escherichia coli. Compounds 4a and 8c showed the highest level of inhibition zone against Gram-positive bacteria (Staph. aureus, Bacillus subtilis) at concentration 0.3, 0.4 and 0.5 mg/ml compared with ciprofloxacin at the same concentrations. The results demonstrated that every compound has significant anti-inflammatory activity. At a concentration of 250 µg/ml, compounds 3a, 4c and 8c had the highest percentage inhibition of protein denaturation when (83.24%, 86.44% and 85.14%, respectively) compared to other compounds and diclofenac sodium as reference drug. Comparing compounds 4c and 8c to ciprofloxacin and diclofenac sodium, they showed powerful antibacterial and anti-inflammatory action. Furthermore, an investigation using molecular docking against DHPS from S. aureus (PDB ID: 6CLV) showed a strong connection with the intended protein and an elevated docking score, making it a prime candidate for antibiotics.
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Affiliation(s)
- Ahmed M El-Saghier
- Chemistry Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt.
| | - Asmaa Abdul-Baset
- Chemistry Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Omer M El-Hady
- Chemistry Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Walaa M Abd El-Raheem
- Botany and Microbiology Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt
| | - Asmaa M Kadry
- Chemistry Department, Faculty of Science, Sohag University, Sohag, 82524, Egypt
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2
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Mughal EU, Amjid S, Sadiq A, Naeem N, Nazir Y, Alrafai HA, Hassan AA, Al-Nami SY, Abdel Hafez AA, Ali Shah SW, Ghias M. Design and synthesis of 2-amino-4,6-diarylpyrimidine derivatives as potent α-glucosidase and α-amylase inhibitors: structure-activity relationship, in vitro, QSAR, molecular docking, MD simulations and drug-likeness studies. J Biomol Struct Dyn 2024; 42:244-260. [PMID: 37096830 DOI: 10.1080/07391102.2023.2198609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/10/2023] [Indexed: 04/26/2023]
Abstract
In the present study, a series of 2-amino-4,6-diarylpyrimidine derivatives was designed, synthesized, characterized and evaluated for their in vitro α-glucosidase and α-amylase enzyme inhibition assays. The outcomes proved that this class of compounds exhibit considerable inhibitory activity against both enzymes. Among the target compounds, compounds 4p and 6p demonstrated the most potent dual inhibition with IC50 = 0.087 ± 0.01 μM for α-glucosidase; 0.189 ± 0.02 μM for α-amylase and IC50 = 0.095 ± 0.03 μM for α-glucosidase; 0.214 ± 0.03 μM for α-amylase, respectively as compared to the standard rutin (IC50 = 0.192 ± 0.02 μM for α-glucosidase and 0.224 ± 0.02 μM for α-amylase). Remarkably, the enzyme inhibition results indicate that test compounds have stronger inhibitory effect on the target enzymes than the positive control, with a significantly lower IC50 value. Moreover, these series of compounds were found to inhibit α-glucosidase activity in a reversible mixed-type manner with IC50 between 0.087 ± 0.01 μM to 1.952 ± 0.26 μM. Furthermore, molecular docking studies were performed to affirm the binding interactions of this scaffold to the active sites of α-glucosidase and α-amylase enzymes. The quantitative structure-activity relationship (QSAR) investigations showed a strong association between 1p-15p structures and their inhibitory actions (IC50) with a correlation value (R2) of 0.999916. Finally, molecular dynamic (MD) simulations were carried out to assess the dynamic behavior, stability of the protein-ligand complex, and binding affinity of the most active inhibitor 4p. The experimental and theoretical results therefore exposed a very good compatibility. Additionally, the drug-likeness assay revealed that some compounds exhibit a linear association with Lipinski's rule of five, indicating good drug-likeness and bioactivity scores for pharmacological targets.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | - Samreen Amjid
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Amina Sadiq
- Department of Chemistry, Govt. College Women University, Sialkot, Pakistan
| | - Nafeesa Naeem
- Department of Chemistry, University of Gujrat, Gujrat, Pakistan
| | - Yasir Nazir
- Department of Chemistry, Allama Iqbal Open University, Islamabad, Pakistan
| | - H A Alrafai
- Department of Chemistry, Faculty of Science, King Khalid University, Abraham, Saudi Arabia
| | - Abeer A Hassan
- Department of Chemistry, Faculty of Science, King Khalid University, Abraham, Saudi Arabia
| | - Samar Y Al-Nami
- Department of Chemistry, Faculty of Science, King Khalid University, Abraham, Saudi Arabia
| | - Amal A Abdel Hafez
- Department of Chemistry, Faculty of Science, King Khalid University, Abraham, Saudi Arabia
| | - Syed Wadood Ali Shah
- Department of Pharmacy, University of Malakand, Chakdara Dir, Khyber Pakhtunkhwa, Pakistan
| | - Mehreen Ghias
- Department of Pharmacy, University of Malakand, Chakdara Dir, Khyber Pakhtunkhwa, Pakistan
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Hassan RM, Abd El-Maksoud MS, Ghannam IAY, El-Azzouny AAS, Aboul-Enein MN. Synthetic non-toxic anti-biofilm agents as a strategy in combating bacterial resistance. Eur J Med Chem 2023; 262:115867. [PMID: 37866335 DOI: 10.1016/j.ejmech.2023.115867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/26/2023] [Accepted: 10/09/2023] [Indexed: 10/24/2023]
Abstract
The tremendous increase in the bacterial resistance to the available antibiotics is a serious problem for the treatment of various infections. Biofilm formation in bacteria significantly contributes to the bacterial survival in host cells, and is considered as an crucial factor, responsible for bacterial resistance. The response of the bacterial cells in the biofilm to antibiotics is completely different from that of the free floating planktonic cells of the same strain. The anti-biofilm agents that could inhibit the biofilm production without affecting the bacterial growth, apply less selective pressure over the bacterial strains than the traditional antibiotics; thus the development of bacterial resistance would be of low incidence. Many attempts have been performed to discover novel agents capable of interfering with the bacterial biofilm life cycle, and several compounds have shown promising activities in suppressing the biofilm production or in dispersing mature existing biofilms. This review describes the different chemical classes that have anti-biofilm effects against different Gram-positive and Gram-negative bacteria without affecting the bacterial growth.
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Affiliation(s)
- Rasha Mohamed Hassan
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt.
| | - Mohamed Samir Abd El-Maksoud
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt
| | - Iman Ahmed Youssef Ghannam
- Chemistry of Natural and Microbial Products Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, Dokki, Cairo, 12622, Egypt
| | - Aida Abdel-Sattar El-Azzouny
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt
| | - Mohamed Nabil Aboul-Enein
- Medicinal and Pharmaceutical Chemistry Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre (ID: 60014618), P.O. 12622, Dokki, Giza, Egypt.
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Becerra D, Abonia R, Castillo JC. Recent Applications of the Multicomponent Synthesis for Bioactive Pyrazole Derivatives. Molecules 2022; 27:molecules27154723. [PMID: 35897899 PMCID: PMC9331265 DOI: 10.3390/molecules27154723] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 12/04/2022] Open
Abstract
Pyrazole and its derivatives are considered a privileged N-heterocycle with immense therapeutic potential. Over the last few decades, the pot, atom, and step economy (PASE) synthesis of pyrazole derivatives by multicomponent reactions (MCRs) has gained increasing popularity in pharmaceutical and medicinal chemistry. The present review summarizes the recent developments of multicomponent reactions for the synthesis of biologically active molecules containing the pyrazole moiety. Particularly, it covers the articles published from 2015 to date related to antibacterial, anticancer, antifungal, antioxidant, α-glucosidase and α-amylase inhibitory, anti-inflammatory, antimycobacterial, antimalarial, and miscellaneous activities of pyrazole derivatives obtained exclusively via an MCR. The reported analytical and activity data, plausible synthetic mechanisms, and molecular docking simulations are organized in concise tables, schemes, and figures to facilitate comparison and underscore the key points of this review. We hope that this review will be helpful in the quest for developing more biologically active molecules and marketed drugs containing the pyrazole moiety.
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Affiliation(s)
- Diana Becerra
- Escuela de Ciencias Química, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia, Avenida Central del Norte, Tunja 150003, Colombia;
| | - Rodrigo Abonia
- Research Group of Heterocyclic Compounds, Department of Chemistry, Universidad del Valle, A.A. 25360, Cali 76001, Colombia;
| | - Juan-Carlos Castillo
- Escuela de Ciencias Química, Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia, Avenida Central del Norte, Tunja 150003, Colombia;
- Correspondence: ; Tel.: +57-8-740-5626 (ext. 2425)
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Tan YM, Li D, Li FF, Fawad Ansari M, Fang B, Zhou CH. Pyrimidine-conjugated fluoroquinolones as new potential broad-spectrum antibacterial agents. Bioorg Med Chem Lett 2022; 73:128885. [PMID: 35835379 DOI: 10.1016/j.bmcl.2022.128885] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/26/2022] [Accepted: 07/07/2022] [Indexed: 12/24/2022]
Abstract
Pyrimidine-conjugated fluoroquinolones were constructed to cope with the dreadful resistance. Most of the target pyrimidine derivatives effectively suppressed the growth of the tested strains, especially, 4-aminopyrimidinyl compound 1c showed a broad antibacterial spectrum and low cytotoxicity and exhibited superior antibacterial potency against Enterococcus faecalis with a low MIC of 0.25 μg/mL to norfloxacin and ciprofloxacin. The active compound 1c with fast bactericidal potency could inhibit the formation of biofilms and showed much lower trend for the development of drug-resistance than norfloxacin and ciprofloxacin. Further exploration revealed that compound 1c could prompt ROS accumulations in bacterial cells and interact with DNA to form a DNA-1c complex, thus facilitating bacterial death. ADME analysis indicated that compound 1c possessed favorable drug-likeness and promising pharmacokinetic properties. These results demonstrated that pyrimidine-conjugated fluoroquinolones held hope as potential antibacterial candidates and deserve further study.
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Affiliation(s)
- Yi-Min Tan
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Di Li
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Fen-Fen Li
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Mohammad Fawad Ansari
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Bo Fang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, PR China.
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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6
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Recent Strategies to Combat Biofilms Using Antimicrobial Agents and Therapeutic Approaches. Pathogens 2022; 11:pathogens11030292. [PMID: 35335616 PMCID: PMC8955104 DOI: 10.3390/pathogens11030292] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 02/01/2023] Open
Abstract
Biofilms are intricate bacterial assemblages that attach to diverse surfaces using an extracellular polymeric substance that protects them from the host immune system and conventional antibiotics. Biofilms cause chronic infections that result in millions of deaths around the world every year. Since the antibiotic tolerance mechanism in biofilm is different than that of the planktonic cells due to its multicellular structure, the currently available antibiotics are inadequate to treat biofilm-associated infections which have led to an immense need to find newer treatment options. Over the years, various novel antibiofilm compounds able to fight biofilms have been discovered. In this review, we have focused on the recent and intensively researched therapeutic techniques and antibiofilm agents used for biofilm treatment and grouped them according to their type and mode of action. We also discuss some therapeutic approaches that have the potential for future advancement.
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Ziarani GM, Rad M, Mohajer F, Sehrawat H, Tomar R. Synthesis of Heterocyclic Compounds through Multicomponent Reactions Using 6-Aminouracil as Starting Reagent. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825666210303112858] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The analogs of 6-Amino uracil are essential components due to their biological
activities. The uracil is used as an important component for the synthesis of heterocyclic compounds
like pyrrolo-, pyrido-, pyrimidine-pyrimido scaffolds. Herein, the application of this
compound is reviewed as a precursor in the synthesis of many heterocyclic cores from 2016 to
2020.
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Affiliation(s)
| | - Marzieh Rad
- Department of Chemistry, Faculty of Physics and Chemistry, University of Alzahra, Tehran,Iran
| | - Fatemeh Mohajer
- Department of Chemistry, Faculty of Physics and Chemistry, University of Alzahra, Tehran,Iran
| | - Hitesh Sehrawat
- Department of Chemistry, University of Delhi, Delhi-110007,India
| | - Ravi Tomar
- Department of Chemistry, Faculty of Science, SGT University, Gurugram, Haryana-122505,India
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Novel Potent and Selective DPP-4 Inhibitors: Design, Synthesis and Molecular Docking Study of Dihydropyrimidine Phthalimide Hybrids. Pharmaceuticals (Basel) 2021; 14:ph14020144. [PMID: 33670273 PMCID: PMC7918823 DOI: 10.3390/ph14020144] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 02/06/2021] [Accepted: 02/07/2021] [Indexed: 01/05/2023] Open
Abstract
Background: Dipeptidyl peptidase-4 (DPP-4) inhibitors have emerged as anti-hyperglycemic agents that improve glycemic control in type 2 diabetic patients, either as monotherapy or in combination with other antidiabetic drugs. Methods: A novel series of dihydropyrimidine phthalimide hybrids was synthesized and evaluated for their in vitro and in vivo DPP-4 inhibition activity and selectivity using alogliptin as reference. Oral glucose tolerance test was assessed in type 2 diabetic rats after chronic treatment with the synthesized hybrids ± metformin. Cytotoxicity and antioxidant assays were performed. Additionally, molecular docking study with DPP-4 and structure activity relationship of the novel hybrids were also studied. Results: Among the synthesized hybrids, 10g, 10i, 10e, 10d and 10b had stronger in vitro DPP-4 inhibitory activity than alogliptin. Moreover, an in vivo DPP-4 inhibition assay revealed that 10g and 10i have the strongest and the most extended blood DPP-4 inhibitory activity compared to alogliptin. In type 2 diabetic rats, hybrids 10g, 10i and 10e exhibited better glycemic control than alogliptin, an effect that further supported by metformin combination. Finally, 10j, 10e, 10h and 10d had the highest radical scavenging activity in DPPH assay. Conclusions: Hybrids 10g, 10i and 10e are potent DPP-4 inhibitors which may be beneficial for T2DM treatment.
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Mangasuli SN. Synthesis of novel coumarin-thiazolidine-2,4-dione derivatives: An approach to computational studies and biological evaluation. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2021.100105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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10
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Yao Y, Ren C, Chen L, Zhong L, Xu T, Tan C. Synthesis and Insecticidal Activity of 3-Ethyl Sulfone Pyridine Substituted Aryl Triazole Compounds. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202009042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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11
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Antibacterial activities with the structure-activity relationship of coumarin derivatives. Eur J Med Chem 2020; 207:112832. [DOI: 10.1016/j.ejmech.2020.112832] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 09/04/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
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12
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Structure and interaction properties of MBIL [Bmim][FeCl4] and methanol: A combined FTIR and simulation study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113061] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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13
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Monier M, Abdel-Latif D, El-Mekabaty A, Elattar KM. Bicyclic 6 + 6 systems: the chemistry of pyrimido[4,5- d]pyrimidines and pyrimido[5,4- d]pyrimidines. RSC Adv 2019; 9:30835-30867. [PMID: 35558733 PMCID: PMC9092567 DOI: 10.1039/c9ra05687d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/17/2019] [Indexed: 12/25/2022] Open
Abstract
The present study provides an overview of the chemistry and biological significance of pyrimido[4,5-d]pyrimidine and pyrimido[5,4-d]pyrimidine analogs as types of bicyclic [6 + 6] systems. The main sections include: (1) synthesis methods; (2) the reactivities of the substituents linked to the ring carbon and nitrogen atoms; and (3) biological applications. A discussion demonstrating the proposed mechanisms of unexpected synthetic routes is intended. The aim of this study is to discuss the synthetic significance of the titled compounds and to establish the biological characteristics of this class of compounds as studied to date, where the compounds have been applied on a large scale in the medical and pharmaceutical fields. This survey will help researchers in the fields of synthetic organic and medicinal chemistry to undertake and improve new approaches for the construction of new standard biological components.
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Affiliation(s)
- M Monier
- Chemistry Department, Faculty of Science, Taibah University Yanbu Al-Bahr Kingdom of Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt +201010655354
| | - Doaa Abdel-Latif
- Chemistry Department, Faculty of Science, Taibah University Yanbu Al-Bahr Kingdom of Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt +201010655354
| | - Ahmed El-Mekabaty
- Chemistry Department, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt +201010655354
| | - Khaled M Elattar
- Chemistry Department, Faculty of Science, Mansoura University El-Gomhoria Street Mansoura 35516 Egypt +201010655354
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Zhang T, Zhang Y, Wang Y, Huo F, Li Z, Zeng Q, He H, Li X. Theoretical Insights Into the Depolymerization Mechanism of Lignin to Methyl p-hydroxycinnamate by [Bmim][FeCl 4] Ionic Liquid. Front Chem 2019; 7:446. [PMID: 31275927 PMCID: PMC6591258 DOI: 10.3389/fchem.2019.00446] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 05/31/2019] [Indexed: 11/30/2022] Open
Abstract
Depolymerization of lignin into valuable aromatic compounds is an important starting point for its valorization strategies, which requires the cleavage of C-O and C-C bonds between lignin monomer units. The catalytic cleavage of these bonds is still difficult and challenging. Our previous experimental investigation (Green Chem., 2018, 20: 3743) has shown that methyl p-hydroxycinnamate (MPC) can be produced from molecular tailoring of H unit in lignin by the cleavage of the γ-O ester bond. In this study, the mechanism of [Bmim][FeCl4]-catalyzed depolymerization of lignin was investigated by using the density functional theory (DFT) method. The results reveal that [FeCl4]- anion of the catalyst plays a decisive role in the whole catalytic process, where two possible activation modes including three different potential reaction pathways can realize the depolymerization of lignin model compound. The calculated overall barriers of the catalytic conversion along these potential routes show that the third potential pathway, i.e., methanol firstly activated by [Bmim][FeCl4], has the most probability with the lowest energy barrier, while the second pathway is excluded because the energy barrier is too high. Also, the results illustrate that the solvent effect is beneficial to the reduction of the relative energy for the reaction to form the transition states. Hence, the obtained molecular level information can identify the favorable conversion process catalyzed by metallic ionic liquids to a certain extent, and it is desirable to enhance the utilization of biomass as a ubiquitous feedstock.
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Affiliation(s)
- Tian Zhang
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Yaqin Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Yanlei Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Feng Huo
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Zhangmin Li
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Qiang Zeng
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
| | - Xuehui Li
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
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15
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Nagargoje AA, Akolkar SV, Siddiqui MM, Bagade AV, Kodam KM, Sangshetti JN, Damale MG, Shingate BB. Synthesis and evaluation of pyrazole‐incorporated monocarbonyl curcumin analogues as antiproliferative and antioxidant agents. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Amol A. Nagargoje
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Satish V. Akolkar
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Madiha M. Siddiqui
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Aditi V. Bagade
- Department of ChemistrySavitribai Phule Pune University Pune India
| | - Kisan M. Kodam
- Department of ChemistrySavitribai Phule Pune University Pune India
| | | | - Manoj G. Damale
- Department of Pharmaceutical ChemistrySrinath College of Pharnacy Aurangabad India
| | - Bapurao B. Shingate
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
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16
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Chate AV, Redlawar AA, Bondle GM, Sarkate AP, Tiwari SV, Lokwani DK. A new efficient domino approach for the synthesis of coumarin-pyrazolines as antimicrobial agents targeting bacteriald-alanine-d-alanine ligase. NEW J CHEM 2019. [DOI: 10.1039/c9nj00703b] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inhibition ofd-alanine-d-alanine ligase (Ddl) prevents bacterial growth, which makes this enzyme an attractive and viable target in the urgent search for novel effective antimicrobial drugs.
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Affiliation(s)
- Asha V. Chate
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Ankita A. Redlawar
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Giribala M. Bondle
- Department of Chemistry, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431 004
- India
| | - Aniket P. Sarkate
- Department of Chemical Technology, Dr Babasaheb Ambedkar Marathwada University
- Aurangabad-431004
- India
| | - Shailee V. Tiwari
- Department of Pharmaceutical Chemistry, Durgamata Institute of Pharmacy
- Parbhani-431401
- India
| | - Deepak K. Lokwani
- R. C. Patel Institute of Pharmaceutical Education & Research
- Shirpur-425405
- India
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Thirumurugan K, Lakshmanan S, Govindaraj D, Daniel Prabu DS, Ramalakshmi N, Arul Antony S. Design, synthesis and anti-inflammatory activity of pyrimidine scaffold benzamide derivatives as epidermal growth factor receptor tyrosine kinase inhibitors. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Synthetic small molecules as anti-biofilm agents in the struggle against antibiotic resistance. Eur J Med Chem 2018; 161:154-178. [PMID: 30347328 DOI: 10.1016/j.ejmech.2018.10.036] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 01/24/2023]
Abstract
Biofilm formation significantly contributes to microbial survival in hostile environments and it is currently considered a key virulence factor for pathogens responsible for serious chronic infections. In the last decade many efforts have been made to identify new agents able to modulate bacterial biofilm life cycle, and many compounds have shown interesting activities in inhibiting biofilm formation or in dispersing pre-formed biofilms. However, only a few of these compounds were tested using in vivo models for their clinical significance. Contrary to conventional antibiotics, most of the anti-biofilm compounds act as anti-virulence agents as they do not affect bacterial growth. In this review we selected the most relevant literature of the last decade, focusing on the development of synthetic small molecules able to prevent bacterial biofilm formation or to eradicate pre-existing biofilms of clinically relevant Gram-positive and Gram-negative pathogens. In addition, we provide a comprehensive list of the possible targets to counteract biofilm formation and development, as well as a detailed discussion the advantages and disadvantages of the different current biofilm-targeting strategies.
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Chavan RR, Hosamani KM. Microwave-assisted synthesis, computational studies and antibacterial/ anti-inflammatory activities of compounds based on coumarin-pyrazole hybrid. ROYAL SOCIETY OPEN SCIENCE 2018; 5:172435. [PMID: 29892430 PMCID: PMC5990750 DOI: 10.1098/rsos.172435] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 03/20/2018] [Indexed: 06/08/2023]
Abstract
An efficient, high-yield and rapid synthesis of (E)-1,5-dimethyl-4-((2-((substituted-2-oxo-2H-chromen-4-yl)methoxy)naphthalen-1-yl)methyleneamino)-2-phenyl-1,2-dihydropyrazol-3-one derivatives (3a-3i) containing Schiff base structures under microwave-irradiation has been described. Schiff base is a potential target to discover anti-inflammatory chemotherapeutics, material science, catalysis and molecular magnetism. All the newly synthesized compounds (3a-3i) have been characterized by elemental analysis and spectroscopic techniques. The synthesized compounds (3a-3i) were evaluated for their antibacterial activity by agar-well diffusion method and anti-inflammatory activity by egg albumin denaturation method. The compounds (3e) and (3i) exhibit antibacterial effect with minimum inhibitory concentration (MIC) 0.78 µg ml-1 and MIC 1.562 µg ml-1 against Gram-positive Staphylococcus aureus bacterial strain compared with standard ciprofloxacin drug (MIC 6.25 µg ml-1). The compounds (3c) and (3f) exhibited an inhibition of heat-induced protein denaturation at the concentration (31.25 µg ml-1) as 53.65% and 67.27%, respectively, and these compounds are more active than standard aceclofenac drug (5.50%). Molecular docking study has been performed for all the synthesized compounds with S. aureus dihydropteroate synthetase and results obtained are quite promising.
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Gong Z, Xie Z, Qiu J, Wang G. Synthesis, Biological Evaluation and Molecular Docking Study of 2-Substituted-4,6-Diarylpyrimidines as α-Glucosidase Inhibitors. Molecules 2017; 22:molecules22111865. [PMID: 29084182 PMCID: PMC6150375 DOI: 10.3390/molecules22111865] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 10/27/2017] [Accepted: 10/27/2017] [Indexed: 11/24/2022] Open
Abstract
A novel series of 2-substituted-4,6-diarylpyrimidines 6a–6t has been synthesized, characterized by 1H-NMR, 13C-NMR and HRMS, and screened for in vitro α-glucosidase inhibitory activity. The majority of the screened compounds possessed significant α-glucosidase inhibitory activity with IC50 values ranging from 19.6 ± 0.21 to 38.9 ± 0.35 μM, which is more potent than the positive control α-glucosidase inhibitor acarbose (IC50 = 817.38 ± 6.27 μM). Among them, 6j was found to be the most active compound against α-glucosidase with an IC50 of 19.6 ± 0.21 μM. In addition, molecular docking studies were carried out to explore the binding interactions of 2-substituted-4,6-diarylpyrimidine derivatives with α-glucosidase.
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Affiliation(s)
- Zipeng Gong
- Provincial Key Laboratory of Pharmaceutics in Guizhou Province, Guizhou Medical University, Beijing Road, Guiyang 550004, China.
- School of Pharmacy, Guizhou Medical University, 4 Beijing Road, Guiyang 550004, China.
- National Engineering Research Center of Miao's Medicines, 4 Beijing Road, Guiyang 550004, China.
| | - Zhenzhen Xie
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.
| | - Jie Qiu
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.
| | - Guangcheng Wang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China.
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21
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Khan SA, Asiri AM, Rahman RM, Elroby SA, Aqlan FMS, Wani MY, Sharma K. Multistep Synthesis of Fluorine-Substituted Pyrazolopyrimidine Derivatives With Higher Antibacterial Efficacy Based on In Vitro
Molecular Docking and Density Functional Theory. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2923] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Salman A. Khan
- Chemistry Department, Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - Abdullah M. Asiri
- Chemistry Department, Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR); King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - R. M. Rahman
- Chemistry Department, Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
| | - Shaaban A. Elroby
- Chemistry Department, Faculty of Science; King Abdulaziz University; P.O. Box 80203 Jeddah 21589 Saudi Arabia
- Chemistry Department, Faculty of Science; Beni-Suef University; Beni-Suef Egypt
| | - Faisal M. S. Aqlan
- Chemistry Department, Faculty of Science; Jeddah University; Jeddah Saudi Arabia
| | - Mohmmad Y. Wani
- Texas Therapeutics Institute, Brown Foundation Institute of Molecular Medicine; The University of Texas Health Science Center at Houston; 1881 East Road 77054 Texas USA
| | - Kamlesh Sharma
- Department of Applied Science, School of Engineering and Technology; The NorthCap University; Gurgaon Haryana India
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