1
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Synthesis, characterization and electrochemical behavior of new bis(fluoroalkyl) ferrocenylphosphonates and their tin tetrachloride complexes. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Bouchareb F, Berredjem M. Recent progress in the synthesis of phosphoramidate and phosphonamide derivatives: A review. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2021.2012781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Fouzia Bouchareb
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar - Annaba University, Annaba, Algeria
- Faculty of Sciences and Technology, Department of Chemistry, Chadli Bendjedid - EL Tarf University, El Tarf, Algeria
| | - Malika Berredjem
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Faculty of Sciences, Department of Chemistry, Badji-Mokhtar - Annaba University, Annaba, Algeria
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3
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Laribi F, Sanhoury MAK, Mechi H, Merlet D, Chehidi I. Synthesis and characterization of new highly fluorinated phosphoramidates. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1910847] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- F. Laribi
- Laboratory of Structural Organic Chemistry: Synthesis and Physico-Chemical Studies, Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El-Manar, Tunis, Tunisia
- Laboratoire de RMN en Milieu Orienté, Université Paris-Sud 11, ICMMO, UMR CNRS 8182, France
| | - M. A. K. Sanhoury
- Laboratory of Structural Organic Chemistry: Synthesis and Physico-Chemical Studies, Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El-Manar, Tunis, Tunisia
- Materials Chemistry Research Unit, Department of Chemistry, Faculty of Sciences and Techniques, UNA, Nouakchott, Mauritania
| | - H. Mechi
- Laboratory of Structural Organic Chemistry: Synthesis and Physico-Chemical Studies, Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El-Manar, Tunis, Tunisia
| | - D. Merlet
- Laboratoire de RMN en Milieu Orienté, Université Paris-Sud 11, ICMMO, UMR CNRS 8182, France
| | - I. Chehidi
- Laboratory of Structural Organic Chemistry: Synthesis and Physico-Chemical Studies, Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El-Manar, Tunis, Tunisia
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4
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Subratti A, Ramkissoon A, Lalgee LJ, Jalsa NK. Synthesis and evaluation of the antibiotic-adjuvant activity of carbohydrate-based phosphoramidate derivatives. Carbohydr Res 2020; 500:108216. [PMID: 33309230 DOI: 10.1016/j.carres.2020.108216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 11/27/2020] [Accepted: 12/01/2020] [Indexed: 10/22/2022]
Abstract
Phosphoramidates are becoming increasingly recognized as molecular targets for therapeutic development. Their biological functions are significantly influenced by their inherent properties such as reactivity, as well as the P-N backbone which allows for structural diversity. In this study we report the synthesis of novel carbohydrate-based phosphoramidate derivatives via the Staudinger-phosphite reaction; along with an evaluation of their adjuvant activity in combination with popular antibiotics. Our targets involved variation in both the sugar residue as well as the identity of the phosphoramidate. Moderate to excellent yields of these derivatives were obtained. Notable adjuvant activity was observed with the halogenated phosphoramidates. For the fluorinated glucose derivative in particular, a remarkable 32-fold decrease in the MIC of Ampicillin was obtained against Methicillin-resistant S. aureus.
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Affiliation(s)
- Afraz Subratti
- Department of Chemistry, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago
| | - Antonio Ramkissoon
- Department of Life Sciences, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago
| | - Lorale J Lalgee
- Department of Chemistry, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago
| | - Nigel K Jalsa
- Department of Chemistry, The University of the West Indies, St. Augustine Campus, Trinidad and Tobago.
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5
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Synthesis, biological evaluation and molecular docking studies of Combretastatin A-4 phosphoramidates as novel anticancer prodrugs. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02632-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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6
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Itumoh EJ, Data S, Leitao EM. Opening up the Toolbox: Synthesis and Mechanisms of Phosphoramidates. Molecules 2020; 25:E3684. [PMID: 32823507 PMCID: PMC7463754 DOI: 10.3390/molecules25163684] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/05/2020] [Accepted: 08/11/2020] [Indexed: 11/25/2022] Open
Abstract
This review covers the main synthetic routes to and the corresponding mechanisms of phosphoramidate formation. The synthetic routes can be separated into six categories: salt elimination, oxidative cross-coupling, azide, reduction, hydrophosphinylation, and phosphoramidate-aldehyde-dienophile (PAD). Examples of some important compounds synthesized through these routes are provided. As an important class of organophosphorus compounds, the applications of phosphoramidate compounds, are also briefly introduced.
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Affiliation(s)
- Emeka J. Itumoh
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand; (E.J.I.); (S.D.)
- Department of Industrial Chemistry, Ebonyi State University, Abakaliki 480001, Ebonyi State, Nigeria
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - Shailja Data
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand; (E.J.I.); (S.D.)
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - Erin M. Leitao
- School of Chemical Sciences, The University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand; (E.J.I.); (S.D.)
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
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7
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Sivala MR, Chintha V, Potla KM, Chinnam S, Chamarthi NR. In silico docking studies and synthesis of new phosphoramidate derivatives of 6-fluoro-3-(piperidin-4-yl)benzo[d]isoxazole as potential antimicrobial agents. J Recept Signal Transduct Res 2020; 40:486-492. [DOI: 10.1080/10799893.2020.1752719] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Venkataramaiah Chintha
- Division of Molecular Biology, Department of Zoology, Sri Venkateswara University, Tirupati, India
- Department of Zoology, Sri Venkateswara Vedic University, Tirupati, India
| | - Krishna Murthy Potla
- Department of Chemistry, Bapatla Engineering College (Autonomous), Acharya Nagarjuna University Post Graduate Research Centre, Bapatla, India
| | - Sampath Chinnam
- Department of Chemistry, B.M.S. College of Engineering, Bengaluru, India
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8
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Rego YF, Queiroz MP, Brito TO, Carvalho PG, de Queiroz VT, de Fátima Â, Macedo Jr. F. A review on the development of urease inhibitors as antimicrobial agents against pathogenic bacteria. J Adv Res 2018; 13:69-100. [PMID: 30094084 PMCID: PMC6077150 DOI: 10.1016/j.jare.2018.05.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 04/30/2018] [Accepted: 05/01/2018] [Indexed: 01/24/2023] Open
Abstract
Ureases are enzymes that hydrolyze urea into ammonium and carbon dioxide. They have received considerable attention due to their impacts on living organism health, since the urease activity in microorganisms, particularly in bacteria, are potential causes and/or factors contributing to the persistence of some pathogen infections. This review compiles examples of the most potent antiurease organic substances. Emphasis was given to systematic screening studies on the inhibitory activity of rationally designed series of compounds with the corresponding SAR considerations. Ureases of Canavalia ensiformis, the usual model in antiureolytic studies, are emphasized. Although the active site of this class of hydrolases is conserved among bacteria and vegetal ureases, the same is not observerd for allosteric site. Therefore, inhibitors acting by participating in interactions with the allosteric site are more susceptible to a potential lack of association among their inhibitory profile for different ureases. The information about the inhibitory activity of different classes of compounds can be usefull to guide the development of new urease inhibitors that may be used in future in small molecular therapy against pathogenic bacteria.
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Affiliation(s)
- Yuri F. Rego
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marcelo P. Queiroz
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Tiago O. Brito
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | - Priscila G. Carvalho
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | - Vagner T. de Queiroz
- Departamento de Química e Física, Centro de Ciências Exatas, Naturais e da Saúde, Universidade Federal do Espírito Santo, Alegre, ES, Brazil
| | - Ângelo de Fátima
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Fernando Macedo Jr.
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, PR, Brazil
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10
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Nayab Rasool SK, Subramanyam C, Janakiramudu DB, Supraja P, Usha R, Raju CN. Convenient one-pot synthesis and biological evaluation of phosphoramidates and phosphonates containing heterocycles. PHOSPHORUS SULFUR 2018. [DOI: 10.1080/10426507.2018.1452229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- SK. Nayab Rasool
- Department of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
| | - Ch. Subramanyam
- Department of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
| | - D. B. Janakiramudu
- Department of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
| | - P. Supraja
- Department of Biotechnology, Sri Padmavathi Mahila Visvavidyalayam, Tirupati, Andhra Pradesh, India
| | - R. Usha
- Department of Biotechnology, Sri Padmavathi Mahila Visvavidyalayam, Tirupati, Andhra Pradesh, India
| | - C. Naga Raju
- Department of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh, India
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11
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Gao Y, Li J, Li J, Song Z, Shang S, Rao X. High Add Valued Application of Turpentine in Crop Production through Structural Modification and QSAR Analysis. Molecules 2018; 23:molecules23020356. [PMID: 29419733 PMCID: PMC6017721 DOI: 10.3390/molecules23020356] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/03/2018] [Accepted: 02/06/2018] [Indexed: 12/13/2022] Open
Abstract
Turpentine is a volatile component of resin, which is an abundant forest resource in Southern China. As one of the most important components, the integrated application of β-pinene has been studied. The broad-spectrum evaluation of β-pinene and its analogues has, therefore, been necessary. In an attempt to expand the scope of agro-activity trials, the preparation and the evaluation of the herbicidal activity of a series of β-pinene analogues against three agricultural herbs were carried out. In accordance with the overall herbicidal activity, it is noteworthy that compounds 6k, 6l, and 6m demonstrated extreme activity with IC50 values of 0.065, 0.065, and 0.052 mol active ingredients/hectare against E. crus-galli. The preliminary structure-activity relationship (SAR) was analyzed and the compounds with the appropriate volatility and substituent type that had beneficial herbicidal activity were analyzed. Simultaneously, the quantitative structure-activity relationship (QSAR) model was built and the most important structural features were indicated, which was, to a certain extent, in line with the SAR study. The study aimed to study the application of the forest resource turpentine in agriculture as a potential and alternative approach for comprehensive utilization.
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Affiliation(s)
- Yanqing Gao
- Research & Development Center of Biorational Pesticide, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Jingjing Li
- Shaanxi Province Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Jian Li
- Shaanxi Province Key Laboratory of Economic Plant Resources Development and Utilization, College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Zhanqian Song
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu, China.
| | - Shibin Shang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu, China.
| | - Xiaoping Rao
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu, China.
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12
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Hamzehee F, Pourayoubi M, Farhadipour A, Choquesillo-Lazarte D. Two new phosphinic amides: Synthesis, crystal structure, and theoretical study of hydrogen bonding. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1239200] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Farahnaz Hamzehee
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mehrdad Pourayoubi
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-Universidad de Granada, Armilla, Granada, Spain
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13
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Oliveira FM, Barbosa LC, Fernandes SA, Lage MR, Carneiro JWDM, Kabeshov MA. Evaluation of some density functional methods for the estimation of hydrogen and carbon chemical shifts of phosphoramidates. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.06.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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14
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Dorosti N, Delfan B, Gholivand K, Valmoozi AAE. Synthesis, crystal structure, biological evaluation, electronic aspects of hydrogen bonds, and QSAR studies of some new N-(substituted phenylurea) diazaphosphore derivatives as anticancer agents. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1527-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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15
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In Silico Designing and Analysis of Inhibitors against Target Protein Identified through Host-Pathogen Protein Interactions in Malaria. INTERNATIONAL JOURNAL OF MEDICINAL CHEMISTRY 2016; 2016:2741038. [PMID: 27057354 PMCID: PMC4739458 DOI: 10.1155/2016/2741038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/13/2015] [Accepted: 11/17/2015] [Indexed: 01/20/2023]
Abstract
Malaria, a life-threatening blood disease, has been a major concern in the field of healthcare. One of the severe forms of malaria is caused by the parasite Plasmodium falciparum which is initiated through protein interactions of pathogen with the host proteins. It is essential to analyse the protein-protein interactions among the host and pathogen for better understanding of the process and characterizing specific molecular mechanisms involved in pathogen persistence and survival. In this study, a complete protein-protein interaction network of human host and Plasmodium falciparum has been generated by integration of the experimental data and computationally predicting interactions using the interolog method. The interacting proteins were filtered according to their biological significance and functional roles. α-tubulin was identified as a potential protein target and inhibitors were designed against it by modification of amiprophos methyl. Docking and binding affinity analysis showed two modified inhibitors exhibiting better docking scores of −10.5 kcal/mol and −10.43 kcal/mol and an improved binding affinity of −83.80 kJ/mol and −98.16 kJ/mol with the target. These inhibitors can further be tested and validated in vivo for their properties as an antimalarial drug.
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16
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Jiao Y, Ma Z, Ewing CP, Guerry P, Monteiro MA. Synthesis and immunodetection of 6-O-methyl-phosphoramidyl-α-D-galactose: a Campylobacter jejuni antigenic determinant. Carbohydr Res 2015; 418:9-12. [DOI: 10.1016/j.carres.2015.09.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 09/22/2015] [Accepted: 09/24/2015] [Indexed: 11/27/2022]
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18
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Synthesis, molecular properties and DFT studies of new phosphoramidates as potential urease inhibitors. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1113-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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19
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Tautomerism and multiple modelling enhance the efficacy of QSAR: antimalarial activity of phosphoramidate and phosphorothioamidate analogues of amiprophos methyl. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1043-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Affiliation(s)
- Roger A. Ashmus
- Alberta
Glycomics Centre
and Department of Chemistry, The University of Alberta, Gunning−Lumieux Chemistry Centre, Edmonton, Alberta T6G 2G2, Canada
| | - Todd L. Lowary
- Alberta
Glycomics Centre
and Department of Chemistry, The University of Alberta, Gunning−Lumieux Chemistry Centre, Edmonton, Alberta T6G 2G2, Canada
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21
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Liu W, Zhang L, Zhou H, Yang C, Miao Z, Zhao Y. Synthesis of novel nucleoside analogue phosphorothioamidate prodrugs and in vitro anticancer evaluation against RKO human colon carcinoma cells. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2014; 32:161-73. [PMID: 24001190 DOI: 10.1080/15257770.2013.770523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Novel phosphorothioamidates of pyrimidine nucleoside analogues have been prepared and evaluated in vitro against RKO human colon cancer cell by the MTT cytotoxicity assay. The parent nucleoside analogues were inactive in this assay, while the phosphorothioamidate prodrugs were active at low uM levels in some cases. The O-isopropyl phosphorothioamidate of 2 ',3 '-O-isopropylidene-uridine containing the L-phenylalanine ethyl ester 6f was the most active at 148 uM, a 10-fold enhancement in anticancer activity compared with the parent nucleoside 2 with no increase in cytotoxicity.
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Affiliation(s)
- Wei Liu
- College of Sciences, Tianjin University of Science and Technology, Tianjin, China.
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22
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Oliveira FM, Barbosa LCA, Ismail FMD. The diverse pharmacology and medicinal chemistry of phosphoramidates – a review. RSC Adv 2014. [DOI: 10.1039/c4ra01454e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Promising examples of the phosphoramidates, which possess antiviral, antitumor, antibacterial, antimalarial and anti-protozoal as well as enzyme inhibitor activity are reviewed.
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Affiliation(s)
| | - Luiz C. A. Barbosa
- Department of Chemistry
- Universidade Federal de Viçosa
- Viçosa, Brazil
- Department of Chemistry
- Universidade Federal de Minas Gerais
| | - Fyaz M. D. Ismail
- Medicinal Chemistry Research Group
- Institute for Health Research
- School of Pharmacy & Biomolecular Sciences
- Liverpool John Moores University
- Liverpool, UK
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23
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Masand VH, Mahajan DT, Ben Hadda T, Jawarkar RD, Alafeefy AM, Rastija V, Ali MA. Does tautomerism influence the outcome of QSAR modeling? Med Chem Res 2013. [DOI: 10.1007/s00044-013-0776-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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24
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Oliveira F, Barbosa L, Demuner A, Maltha C, Fernandes S, Carneiro JM, Corrêa R, Doriguetto A. Spectroscopic and dynamic NMR study, X-ray crystallography and DFT calculations of two phosphoramidates: (C4H3O2)P(O)(Cl)C6H14N and (C4H3O2)P(O)(C6H11NH)2. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.04.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Khalladi K, Touil S. Unexpected synthesis of novelO-ethyl-P-aryl-N-(thiophen-2-yl) phosphonamidothioates from ethyl 2-aminothiophene- 3-carboxylates and Lawesson's reagent. J Sulphur Chem 2013. [DOI: 10.1080/17415993.2013.815750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Mara C, Dempsey E, Bell A, Barlow JW. Synthesis and evaluation of phenoxyoxazaphospholidine, phenoxyoxazaphosphinane, and benzodioxaphosphininamine sulfides and related compounds as potential anti-malarial agents. Bioorg Med Chem Lett 2013; 23:3580-3. [DOI: 10.1016/j.bmcl.2013.04.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/08/2013] [Accepted: 04/09/2013] [Indexed: 11/15/2022]
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27
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Dempsey E, Prudêncio M, Fennell BJ, Gomes-Santos CS, Barlow JW, Bell A. Antimitotic herbicides bind to an unidentified site on malarial parasite tubulin and block development of liver-stage Plasmodium parasites. Mol Biochem Parasitol 2013; 188:116-27. [PMID: 23523992 DOI: 10.1016/j.molbiopara.2013.03.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 03/07/2013] [Accepted: 03/14/2013] [Indexed: 02/04/2023]
Abstract
Malarial parasites are exquisitely susceptible to a number of microtubule inhibitors but most of these compounds also affect human microtubules. Herbicides of the dinitroaniline and phosphorothioamidate classes however affect some plant and protozoal cells but not mammalian ones. We have previously shown that these herbicides block schizogony in erythrocytic parasites of the most lethal human malaria, Plasmodium falciparum, disrupt their mitotic spindles, and bind selectively to parasite tubulin. Here we show for the first time that the antimitotic herbicides also block the development of malarial parasites in the liver stage. Structure-based design of novel antimalarial agents binding to tubulin at the herbicide site, which presumably exists on (some) parasite and plant tubulins but not mammalian ones, can therefore constitute an important transmission blocking approach. The nature of this binding site is controversial, with three overlapping but non-identical locations on α-tubulin proposed in the literature. We tested the validity of the three sites by (i) using site-directed mutagenesis to introduce six amino acid changes designed to occlude them, (ii) producing the resulting tubulins recombinantly in Escherichia coli and (iii) measuring the affinity of the herbicides amiprophosmethyl and oryzalin for these proteins in comparison with wild-type tubulins by fluorescence quenching. The changes had little or no effect, with dissociation constants (Kd) no more than 1.3-fold (amiprophosmethyl) or 1.6-fold (oryzalin) higher than wild-type. We conclude that the herbicides impair Plasmodium liver stage as well as blood stage development but that the location of their binding site on malarial parasite tubulin remains to be proven.
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Affiliation(s)
- Enda Dempsey
- Department of Microbiology, School of Genetics & Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin, Dublin 2, Ireland
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