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Gadde S, Kleynhans A, Holien JK, Bhadbhade M, Nguyen PLD, Mittra R, Yu TT, Carter DR, Parker MW, Marshall GM, Cheung BB, Kumar N. Pyrimido[1,2-a]benzimidazoles as inhibitors of oncoproteins ubiquitin specific protease 5 and MYCN in the childhood cancer neuroblastoma. Bioorg Chem 2023; 136:106462. [PMID: 37060785 DOI: 10.1016/j.bioorg.2023.106462] [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: 11/11/2022] [Revised: 02/16/2023] [Accepted: 03/07/2023] [Indexed: 03/31/2023]
Abstract
The MYCN oncogene and histone deacetylases (HDACs) are key driver genes in the childhood cancer, neuroblastoma. We recently described a novel pyridobenzimidazole analogue, SE486-11, which enhanced the therapeutic effectiveness of HDAC inhibitors by increasing MYCN ubiquitination through effects on the deubiquitinase, ubiquitin-specific protease 5 (USP5). Here we describe the synthesis of a novel series of pyrimido[1,2-a]benzimidazole derivatives, and an evaluation of their cytopathic effects against non-malignant and human neuroblastoma cell lines. Among the tested analogues, 4-(4-methoxyphenyl)benzo[4,5]imidazo[1,2-a]pyrimidine (3a) was the most active compound against neuroblastoma cells (IC50 ≤ 2 µM), with low cytotoxicity (IC50 ≥ 15 µM) to normal cells. We show compound 3a bound to USP5 protein (Kd = 0.47 µM) in vitro and synergistically enhanced the efficacy of HDAC inhibitors against neuroblastoma cells. Moreover, knockdown of USP5 and MYCN in treated neuroblastoma cells showed that both USP5 and MYCN expression was necessary for the cytopathic activity of compound 3a, thus providing a clinically relevant rationale for further development of this of pyrimido[1,2-a]benzimidazole.
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Affiliation(s)
- Satyanarayana Gadde
- School of Chemistry, UNSW Sydney, NSW 2052, Australia; Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Ane Kleynhans
- Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Jessica K Holien
- School of Science, STEM College, RMIT University, Melbourne, VIC 3001, Australia
| | | | | | - Ritu Mittra
- Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Tsz Tin Yu
- School of Chemistry, UNSW Sydney, NSW 2052, Australia
| | - Daniel R Carter
- Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia; School of Biomedical Engineering, University of Technology Sydney, Australia
| | - Michael W Parker
- School of Science, STEM College, RMIT University, Melbourne, VIC 3001, Australia
| | - Glenn M Marshall
- Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia; Kids Cancer Centre, Sydney Children's Hospital, Randwick, NSW, Australia.
| | - Belamy B Cheung
- Children's Cancer Institute Australia for Medical Research, Lowy Cancer Research Centre, UNSW Sydney, Kensington, NSW 2052, Australia; School of Clinical Medicine, UNSW Medicine & Health, UNSW Sydney, NSW, Australia.
| | - Naresh Kumar
- School of Chemistry, UNSW Sydney, NSW 2052, Australia.
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2
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Moussa A, Rahmati A. One-Pot Synthesis of Benzo[4,5]imidazo[1,2-a]pyrimidin-2-ones Using a Hybrid Catalyst Supported on Magnetic Nanoparticles in Green Solvents. ChemistryOpen 2021; 10:764-774. [PMID: 34351084 PMCID: PMC8340068 DOI: 10.1002/open.202100063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/09/2021] [Indexed: 01/11/2023] Open
Abstract
The conversion of soluble polyoxometalate into insoluble polyoxometalate is considered to be one of the major challenges in synthetic organic chemistry. Here, polyoxometalate was bonded to the salt part of an organic branch immobilized on the silica-coated Fe3 O4 nanoparticle and characterized using various techniques. The fabricated complex was used as a heterogeneous catalyst in a novel one-pot reaction for synthesis of benzo[4,5]imidazo[1,2-a]pyrimidin-2-ones using aromatic amines, dimethyl acetylenedicarboxylate (DMAD), derivatives of benzaldehyde and 2-aminobenzimidazole in water/ethanol as a green solvent. 21 derivatives of benzo[4,5]imidazo[1,2-a]pyrimidin-2-one were synthesized by this method and fully characterized. The high stability of the catalyst showed that it can be reused for 6 times without decreasing in activity. The combination of new synthetic method, new ferromagnetic heterogeneous nano-catalyst, green solvent and simple separation method were presented in this work.
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Affiliation(s)
| | - Abbas Rahmati
- Department of ChemistryUniversity of IsfahanP. O. Box81746-73441IsfahanIran
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3
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D'Aria F, D'Amore VM, Di Leva FS, Amato J, Caterino M, Russomanno P, Salerno S, Barresi E, De Leo M, Marini AM, Taliani S, Da Settimo F, Salgado GF, Pompili L, Zizza P, Shirasawa S, Novellino E, Biroccio A, Marinelli L, Giancola C. Targeting the KRAS oncogene: Synthesis, physicochemical and biological evaluation of novel G-Quadruplex DNA binders. Eur J Pharm Sci 2020; 149:105337. [PMID: 32311457 DOI: 10.1016/j.ejps.2020.105337] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 03/30/2020] [Accepted: 04/01/2020] [Indexed: 02/07/2023]
Abstract
The oncogene KRAS is involved in the pathogenesis of many tumors such as pancreatic, lung and colorectal cancers, thereby representing a relevant target for the treatment of these diseases. The KRAS P1 promoter contains a nuclease hypersensitive, guanine-rich sequence able to fold into a G-quadruplex motif (G4). The stabilization of this G4 structure by small molecules is emerging as a feasible approach to downregulate KRAS expression. Here, a set of novel stabilizing molecules was identified through a virtual screening campaign on the NMR structure of the 22-mer KRAS G4. The most promising hits were then submitted to structure-activity relationships studies which allowed improving their binding affinity and selectivity over double helix DNA and different G4 topologies. The best derivative (19) underwent fluorescence titration experiments and further computational studies to disclose its binding mechanism to KRAS G4. Finally, biological assays showed that this compound is capable to reduce the viability of colorectal cancer cells in which mutated KRAS acts as a driver oncogene. Thus, 19 might represent the prototype of a new class of drugs for the treatment of tumors that, expressing mutated forms of KRAS, are refractory to current therapeutic regimens.
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Affiliation(s)
- Federica D'Aria
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Vincenzo Maria D'Amore
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | | | - Jussara Amato
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Marco Caterino
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Pasquale Russomanno
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Silvia Salerno
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Elisabetta Barresi
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Marinella De Leo
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Anna Maria Marini
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Sabrina Taliani
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Federico Da Settimo
- Department of Pharmacy, University of Pisa, via Bonanno 6, 56126 Pisa, Italy
| | - Gilmar F Salgado
- ARNA Laboratory, IECB, University of Bordeaux, Inserm U1212, CNRS UMR 5320, F-33600 Pessac, France
| | - Luca Pompili
- Oncogenomic and Epigenetic Unit, IRCCS - Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Pasquale Zizza
- Oncogenomic and Epigenetic Unit, IRCCS - Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Senji Shirasawa
- Central Research Institute for Advanced Molecular Medicine, Fukuoka University, Fukuoka, Japan
| | - Ettore Novellino
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Annamaria Biroccio
- Oncogenomic and Epigenetic Unit, IRCCS - Regina Elena National Cancer Institute, Via Elio Chianesi 53, 00144 Rome, Italy
| | - Luciana Marinelli
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy
| | - Concetta Giancola
- Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy.
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4
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Green, effective and chromatography free synthesis of benzoimidazo[1,2-a]pyrimidine and tetrahydrobenzo [4,5]imidazo [1,2-d]quinazolin-1(2H)-one and their pyrazolyl moiety using Fe3O4@SiO2@ -proline reusable catalyst in aqueous media. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.05.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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5
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Salerno S, Barresi E, Amendola G, Berrino E, Milite C, Marini AM, Da Settimo F, Novellino E, Supuran CT, Cosconati S, Taliani S. 4-Substituted Benzenesulfonamides Incorporating Bi/Tricyclic Moieties Act as Potent and Isoform-Selective Carbonic Anhydrase II/IX Inhibitors. J Med Chem 2018; 61:5765-5770. [PMID: 29912561 DOI: 10.1021/acs.jmedchem.8b00670] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
As a part of our efforts to expand chemical diversity in the carbonic anhydrases inhibitors (CAIs), three small series of polyheterocyclic compounds (4-6) featuring the primary benzenesulfonamide moiety linked to bi/tricyclic scaffolds were investigated. Highly effective inhibitors against the target tumor-associated hCA IX (low nanomolar/subnanomolar potency levels) showing significant functional selectivity profile toward hCA I, II, and IV isozymes were identified. Molecular docking studies clarified the reasons behind the activity and selectivity of the new compounds.
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Affiliation(s)
- Silvia Salerno
- Dipartimento di Farmacia , Università di Pisa , Via Bonanno 6 , 56126 Pisa , Italy
| | - Elisabetta Barresi
- Dipartimento di Farmacia , Università di Pisa , Via Bonanno 6 , 56126 Pisa , Italy
| | - Giorgio Amendola
- DiSTABiF , Università della Campania Luigi Vanvitelli , Via Vivaldi 43 , 81100 Caserta , Italy
| | - Emanuela Berrino
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , Via Ugo Schiff 6 , 50019 Sesto Fiorentino Florence , Italy
| | - Ciro Milite
- Dipartimento di Farmacia , Università di Salerno , Via Giovanni Paolo II 132 , 84084 Fisciano , Salerno , Italy
| | - Anna Maria Marini
- Dipartimento di Farmacia , Università di Pisa , Via Bonanno 6 , 56126 Pisa , Italy
| | - Federico Da Settimo
- Dipartimento di Farmacia , Università di Pisa , Via Bonanno 6 , 56126 Pisa , Italy
| | - Ettore Novellino
- Dipartimento di Farmacia , Università di Napoli "Federico II" , Via D. Montesano 49 , 80131 Napoli , Italy
| | - Claudiu T Supuran
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , Via Ugo Schiff 6 , 50019 Sesto Fiorentino Florence , Italy
| | - Sandro Cosconati
- DiSTABiF , Università della Campania Luigi Vanvitelli , Via Vivaldi 43 , 81100 Caserta , Italy
| | - Sabrina Taliani
- Dipartimento di Farmacia , Università di Pisa , Via Bonanno 6 , 56126 Pisa , Italy
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6
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Fedotov VV, Ulomskiy EN, Gorbunov EB, Eltsov OS, Voinkov EK, Savateev KV, Drokin RA, Kotovskaya SK, Rusinov VL. 3-Nitropyrimido[1,2-a]benzimidazol-4-ones: synthesis and study of alkylation reaction. Chem Heterocycl Compd (N Y) 2017. [DOI: 10.1007/s10593-017-2095-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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Campos PT, Rodrigues LV, Belladona AL, Bender CR, Bitencurt JS, Rosa FA, Back DF, Bonacorso HG, Zanatta N, Frizzo CP, Martins MAP. Regiochemistry of cyclocondensation reactions in the synthesis of polyazaheterocycles. Beilstein J Org Chem 2017; 13:257-266. [PMID: 28326135 PMCID: PMC5331339 DOI: 10.3762/bjoc.13.29] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 01/30/2017] [Indexed: 11/23/2022] Open
Abstract
The syntheses of several polyazaheterocycles are demonstrated. The cyclocondensation reactions between β-enaminodiketones [CCl3C(O)C(=CNMe2)C(O)-CO2Et] and aromatic amidines resulted in glyoxalate-substituted pyrido[1,2-a]pyrimidinone, thiazolo[3,2-a]pyrimidinone and pyrimido[1,2-a]benzimidazole. Pyrazinones and quinoxalinones were obtained through the reaction of these glyoxalates with ethylenediamine and 1,2-phenylenediamine derivatives. On the other hand, the reaction of glyoxalates with amidines did not lead to the formation of imidazolones, but rather N-acylated products were obtained. All the products were isolated in good yields. DFT-B3LYP calculations provided HOMO/LUMO coefficients, charge densities, and the stability energies of the intermediates, and from these data it was possible to explain the regiochemistry of the products obtained. Additionally, the data were a useful tool for elucidating the reaction mechanisms.
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Affiliation(s)
- Patrick T Campos
- IFSul Campus de Pelotas, Instituto Federal de Educação, Ciência e Tecnologia Sul-Rio-Grandense, 96.015-360, Pelotas, RS, Brazil
| | - Leticia V Rodrigues
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Andrei L Belladona
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Caroline R Bender
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Juliana S Bitencurt
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Fernanda A Rosa
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Maringá, 87020-900,Maringa, PR, Brazil
| | - Davi F Back
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
| | - Helio G Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Clarissa P Frizzo
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
| | - Marcos A P Martins
- Núcleo de Química de Heterociclos (NUQUIMHE), Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97.105-900, Santa Maria, RS, Brazil
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8
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9
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Li YL, Cai G, Liu XJ, Wang K, Du BX. 1-Benzyl-3-methylimidazolium Tetrafluoroborate as an Efficient and Green Reaction Medium for the Synthesis of Pyrimido[1,2-a]benzimidazoles. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751913x13637768014150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of pyrimido[1,2- a]benzimidazole derivatives has been synthesised in high yields in the ionic liquid [bmim]+ BF4-. The structures of the products were characterised by IR, 1H NMR, and HRMS spectroscopy. The reaction work-up is simple and the ionic liquid is easily separated from the products for reuse.
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Affiliation(s)
- Yu-Ling Li
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Gan Cai
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Xiao-Jun Liu
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Kai Wang
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
| | - Bai-Xiang Du
- School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou Jiangsu 221116, P. R. China
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10
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Wang Y, Liu L, Wang D, Chen YJ. Tandem reaction of Morita–Baylis–Hillman alcohols derived from acrylic nitrile with 2-aminobenzimidazole in ionic liquid [BMIM]Cl/H2O. CAN J CHEM 2012. [DOI: 10.1139/v11-095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The tandem reaction of Morita–Baylis–Hillman (MBH) alcohols 1a–1l derived from acrylic nitrile with 2-aminobenzimidazole (2) in ionic iquid (IL) [BMIM]Cl/H2O without additional catalyst was developed for the efficient synthesis of benzimidazol[1,2-a]pyrimidin-7(8H)-imine compounds. The tandem reaction included aza-Michael addition and intramolecular addition of an amino group to the cyano group in one pot. The combination of ionic liquid and water was found to be the best reaction medium, which played a role for accelerating the tandem reaction.
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Affiliation(s)
- Yan Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. Yan Wang Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Li Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. Yan Wang Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. Yan Wang Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yong-Jun Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. Yan Wang Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China
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11
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Hajri A, Abderrahim R. Synthesis and Characterization of [1,2,4,6]Thiatriazino[2,3-a][1,3]benzimidazol-1(2H)-one and [1,3,5]Thiadiazino[3,4-a][1,3]benzimidazol-2-imine. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.506453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. Hajri
- a Laboratory of Physics of Lamellaires Materials and Hybrids Nanomaterials, Faculty of Sciences of Bizerte , University of Carthage , Bizerte , Tunisia
| | - R. Abderrahim
- a Laboratory of Physics of Lamellaires Materials and Hybrids Nanomaterials, Faculty of Sciences of Bizerte , University of Carthage , Bizerte , Tunisia
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12
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Ren C, Wang Y, Wang D, Chen Y, Liu L. Catalyst-free tandem Michael addition-cyclization reactions in aqueous media for the synthesis of benzimidazo[1,2-a]pyrimidinone derivatives. Sci China Chem 2010. [DOI: 10.1007/s11426-010-4033-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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CALISKAN A, KARADENIZ H, MERIC A, ERDEM A. Electrochemical Investigation of Interactions between Potential DNA Targeted Compounds, 2,4-Di- and 2,3,4-Trisubstituted Benzimidazo[1,2-a]pyrimidines and Nucleic Acid. ANAL SCI 2010; 26:117-20. [DOI: 10.2116/analsci.26.117] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Ayfer CALISKAN
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University
| | - Hakan KARADENIZ
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University
| | - Asiye MERIC
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Anadolu University
| | - Arzum ERDEM
- Department of Analytical Chemistry, Faculty of Pharmacy, Ege University
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14
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Wang Y, Shafiq Z, Liu L, Wang D, Chen YJ. Efficient synthesis of benzimidazo[1,2- a]pyrimidinone derivatives viacatalyst-free reactions of Baylis-Hillman acetates, alcohols, and amines with 2-aminobenzimidazole. J Heterocycl Chem 2010. [DOI: 10.1002/jhet.324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Comparative studies on conventional and microwave-assisted synthesis of a series of 2,4-di and 2,3,4-trisubstituted benzimidazo[1,2-a] pyrimidines and their antimicrobial activities. OPEN CHEM 2009. [DOI: 10.2478/s11532-009-0023-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractComparative studies were performed on a series of 2,4-di and 2,3,4-trisubstituted benzimidazo[1,2-a]pyrimidines, which were synthesized with conventional and microwave heating methods. In microwave irradiation method, approximately, 95–97.5% of the reaction time was increased and 1–45% yield increase was obtained. All compounds were able to inhibit the growth of the screened microorganisms in vitro with MIC values between 3.9–250 μg mL−1. The highest activity was expressed by compound IIId (2,4-diphenyl-benzo[4,5]imidazo[1,2-a] pyrimidine), which has the MIC value of 3.9 μg mL−1 and 31.2 μg mL-1 for Penicillium natatum ATCC 24791 and E. faecalis ATCC 29212, respectively.
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16
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Esparza-Ruiz A, Peña-Hueso A, Ramos-García I, Vásquez-Badillo A, Flores-Parra A, Contreras R. Hypervalent triphenyl and diphenyl tin coordination compounds derived from 2-(1H-benzimidazol-2-yl)phenol. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2008.10.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Triphenyl lead, tin and germanium coordination compounds derived from 9H-3-thia-1,4a,9-triaza-fluorene-2,4-dithione. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2007.11.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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