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Dinuclear Iron Complexes of Iminopyridine-Based Ligands as Selective Cytotoxins for Tumor Cells and Inhibitors of Cancer Cell Migration. Pharmaceutics 2022; 14:pharmaceutics14122801. [PMID: 36559294 PMCID: PMC9781652 DOI: 10.3390/pharmaceutics14122801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/01/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
A family of dinuclear iron (II) compounds with iminopyridine-based ligands displays selective cytotoxic activity against cancer cell lines. All compounds have IC50 values 2-6 fold lower than that of cisplatin, and 30-90 fold lower than that of carboplatin for the tumor cell lines assayed. Comparing the IC50 values between tumor and non-tumor cell lines, the selectivity indexes range from 3.2 to 34, compound 10, [Fe2(4)2(CH3CN)4](BF4)4, showing the highest selectivity. Those compounds carrying substituents on the iminopyridine ring show the same cytotoxicity as those without substituents. However, the electronic effects of the substituents on position 6 may be important for the cytotoxicity of the complexes, and consequently for their selectivity. All compounds act over DNA, promoting cuts on both strands in the presence of reactive oxygen species. Since compound 10 presented the highest selectivity, its cytotoxic effect was further characterized. It induces apoptosis, affects cell cycle phase distribution in a cell-dependent manner, and its cytotoxic effect is linked to reactive oxygen species generation. In addition, it decreases tumor cell migration, showing potential antimetastatic effects. These properties make compound 10 a good lead antitumor agent among all compounds studied here.
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Salem MSH, Takizawa S. New anionic cobalt(III) complexes enable enantioselective synthesis of spiro-fused oxazoline and iodoacetal derivatives. Front Chem 2022; 10:1034291. [PMID: 36311431 PMCID: PMC9606352 DOI: 10.3389/fchem.2022.1034291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 09/20/2022] [Indexed: 11/30/2022] Open
Abstract
Anionic salicylimine-based cobalt (III) complexes featuring chiral ligands derived from isoleucine amino acids were used as efficient bifunctional phase-transfer catalysts for electrophilic iodination of enol ethers. The Brønsted acids of these complexes enabled the enantioselective asymmetric iodocyclization of enol ethers, furnishing spiro-fused oxazoline derivatives in high yields with up to 90:10 er. In addition, chiral cobalt (III) complexes catalyze the asymmetric intermolecular iodoacetalization of enol ethers with various alcohols to afford 3-iodoacetal derivatives in high yields with up to 92:8 er.
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Affiliation(s)
- Mohamed S. H. Salem
- SANKEN, Osaka University, Ibaraki, Japan
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
- *Correspondence: Mohamed S. H. Salem, ; Shinobu Takizawa,
| | - Shinobu Takizawa
- SANKEN, Osaka University, Ibaraki, Japan
- *Correspondence: Mohamed S. H. Salem, ; Shinobu Takizawa,
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Divalent cobalt and copper coordination complexes of κ2-N, O-derivatives of (Z)-1-R-2-(2′-oxazolin-2′-yl)-eth-1-en-1-ates: Structure and reactivity patterns. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Chojnacka MW, Adjei JA, Lough AJ, Sacripante GG, Gossage RA. Transition metal complexes of monodentate 2-oxazolines containing long chain alkyl groups. The crystal structure of trans-PdCl 2( κ
1- N- rac-2-heptadecyl-4,5-dihydro-5-methyl-2-oxazole) 2. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2020. [DOI: 10.1515/znb-2019-0212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The synthesis, characterisation and properties of several divalent metal complexes (Co, Ni, Pd) containing 2-oxazoline ligands L1–L3, appended with long chain alkyl and/or ester groups, is reported. The X-ray crystal structure aspects of one such complex, trans-PdCl2(rac-2-heptadecyl-4,5-dihydro-5-methyl-2-oxazole)2 (i.e. PdCl2(L1)2: 3), is described. This latter material contains one of the longest alkyl chains to be crystallographically characterised appended to an oxazoline ligand. The complexes reported herein represent the first transition metal derivatives of these high molecular weight, long chain and presumably low polarity monodentate oxazoline ligands. A combination of spectral and theoretical calculations (semi-empirical PM6(tm) level of theory) are used to support the proposed structure in the case of the hydrates of NiCl2 and CoBr2 complexes derived from L1. A trio of PdCl2 complexes of the ligand set are likewise detailed. Complex 3 is shown to be a useful pre-catalyst for the promotion of a Heck coupling reaction between bromobenzene and styrene under typical conditions.
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Affiliation(s)
- Maja W. Chojnacka
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Xerox Research Centre of Canada, Ltd. , 2660 Speakman Drive , Mississauga ON L5K 2L1 , Canada
- Department of Chemistry , University of California at Riverside , Riverside CA , USA
| | - Jeanette A. Adjei
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Department of Chemistry , Western University , London ON , Canada
| | - Alan J. Lough
- Department of Chemistry , University of Toronto , 80 St. George Street , Toronto ON M5S 3H6 , Canada
| | - Guerino G. Sacripante
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
- Xerox Research Centre of Canada, Ltd. , 2660 Speakman Drive , Mississauga ON L5K 2L1 , Canada
| | - Robert A. Gossage
- Department of Chemistry and Biology , Ryerson University , 350 Victoria Street , Toronto ON M5B 2K3 , Canada
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Chiacchio MA, Lanza G, Chiacchio U, Giofrè SV, Romeo R, Iannazzo D, Legnani L. Oxazole-Based Compounds As Anticancer Agents. Curr Med Chem 2020; 26:7337-7371. [PMID: 30501590 DOI: 10.2174/0929867326666181203130402] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/22/2018] [Accepted: 11/15/2018] [Indexed: 11/22/2022]
Abstract
Heterocyclic compounds represent a significant target for anti-cancer research and drug discovery, due to their structural and chemical diversity. Oxazoles, with oxygen and nitrogen atoms present in the core structure, enable various types of interactions with different enzymes and receptors, favoring the discovery of new drugs. Aim of this review is to describe the most recent reports on the use of oxazole-based compounds in anticancer research, with reference to the newly discovered iso/oxazole-based drugs, to their synthesis and to the evaluation of the most biologically active derivatives. The corresponding dehydrogenated derivatives, i.e. iso/oxazolines and iso/oxazolidines, are also reported.
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Affiliation(s)
- Maria A Chiacchio
- Dipartimento di Scienze del Farmaco, University of Catania, V.le Doria 6, 95125 Catania, Italy
| | - Giuseppe Lanza
- Dipartimento di Scienze del Farmaco, University of Catania, V.le Doria 6, 95125 Catania, Italy
| | - Ugo Chiacchio
- Dipartimento di Scienze del Farmaco, University of Catania, V.le Doria 6, 95125 Catania, Italy
| | - Salvatore V Giofrè
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, University of Messina, Via S.S. Annunziata, 98168 Messina, Italy
| | - Roberto Romeo
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche e Ambientali, University of Messina, Via S.S. Annunziata, 98168 Messina, Italy
| | - Daniela Iannazzo
- Dipartimento di Ingegneria, University of Messina, Contrada Di Dio, 98166 Messina, Italy
| | - Laura Legnani
- Dipartimento di Scienze del Farmaco, University of Catania, V.le Doria 6, 95125 Catania, Italy.,Dipartimento di Chimica, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
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Adjei JA, Lough AJ, Gossage RA. Synthesis and characterisation of κ 2- N, O-oxazoline-enolate complexes of nickel(ii): explorations in coordination chemistry and metal-mediated polymerisation. RSC Adv 2019; 9:3956-3964. [PMID: 35518104 PMCID: PMC9060527 DOI: 10.1039/c8ra10304f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 01/10/2019] [Indexed: 11/21/2022] Open
Abstract
The synthesis and characterisation (UV-Vis, IR, X-ray diffraction, etc.) of a series of Ni(ii) complexes derived from both known and novel 2-acylmethyl-2-oxazolines (2a-g: i.e., (Z)-1-R-2-(4,4'-dimethyl-2'-oxazolin-2'-yl)eth-1-en-1-ol; R = -Ph, -2-furanyl, -p-NO2-Ph, -t-Bu, -2-thiofuranyl, p-NC-Ph, -CF3) is reported. These Ni materials (3a-g) represent the first group 10 metal complexes of this ligand class. All derivatives reported are paramagnetic (S = 1) compounds of formulae Ni(κ2-N,O-L)2 where L represents an enolate of structure (Z)-1-R-2-(4',4'-dimethyl-2'-oxazolin-2'-yl)eth-1-en-1-ate formed via proton loss from 2. The air- and moisture-stable metal complexes feature a less typical distorted seesaw-shaped disposition of binding atoms around the metal centre for six structurally characterised (X-ray) examples. Preliminary investigations indicate that 3a (R = -Ph) is a useful catalysts for olefin polymerisation in the presence of alkylaluminum reagents.
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Affiliation(s)
- Jeanette A Adjei
- Department of Chemistry & Biology, Ryerson University 350 Victoria Street Toronto ON M5B 2K3 Canada
| | - Alan J Lough
- Department of Chemistry, University of Toronto 80 St. George Street Toronto ON M5S 3H6 Canada
| | - Robert A Gossage
- Department of Chemistry & Biology, Ryerson University 350 Victoria Street Toronto ON M5B 2K3 Canada
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Churusova SG, Aleksanyan DV, Rybalkina EY, Nelyubina YV, Peregudov AS, Klemenkova ZS, Kozlov VA. Non-classical N-metallated Pd(II) pincer complexes featuring amino acid pendant arms: Synthesis and biological activity. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.08.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Castro J, Manrique E, Bravo M, Vilanova M, Benito A, Fontrodona X, Rodríguez M, Romero I. A family of manganese complexes containing heterocyclic-based ligands with cytotoxic properties. J Inorg Biochem 2018; 182:124-132. [PMID: 29459271 DOI: 10.1016/j.jinorgbio.2018.01.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/16/2018] [Accepted: 01/30/2018] [Indexed: 01/09/2023]
Abstract
We describe the synthesis of three new manganese (II) complexes containing the bidentate ligands 2-(1-methyl-3-pyrazolyl)pyridine (pypz-Me) and ethyl 2-(3-(pyridine-2-yl)-1H-pyrazol-1-yl)acetate (pypz-CH2COOEt), with formula [MnX2(pypz-Me)2] (X = Cl-1, CF3SO3-2) and [Mn(CF3SO3)2(pypz-CH2COOEt)2] 3. Complexes 1-3 have been characterized through analytical, spectroscopic and electrochemical techniques, as well as by monocrystal X-ray diffraction analysis. The complexes show a six-coordinated Mn(II) ion though different stereoisomers have been isolated for the three compounds. Complexes 1-3, together with the previously described compounds [MnCl2(pypz-H)2] 4, [Mn(CF3SO3)2(pypz-H)2] 5, [Mn(NO3)2(pypz-H)2] 6, [MnCl2(H2O)2(pypz-H)2] 7 (pypz-H = 2-(3-pyrazolyl)pyridine) and ([Mn(CF3SO3)2((-)-L)2] 8, ((-)-L = (-)-pinene[5,6]bipyridine), were tested in vitro for cytotoxic activity against NCI-H460 and OVCAR-8 cancer cell lines. The geometry of a specific compound does not seem to influence its activity in a significant extent. However, among the tested compounds those that display hydrophobic substituents on the pyrazole ring and triflate ions as labile ligands show the best antiproliferative properties. Specifically, compound 8 containing the pinene-bipyridine ligand presents an antiproliferative activity similar to that of cisplatin and higher than that of carboplatin, and displays selectivity for tumour cells. Its antiproliferative effect is due to the generation of ROS species that allow the compound to interact with DNA.
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Affiliation(s)
- Jessica Castro
- Laboratori d'Enginyeria de Proteïnes, Departament de Biologia, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 40, E-17003 Girona, Spain; Institut d'Investigació Biomèdica de Girona Dr. Josep Trueta, Girona, Spain
| | - Ester Manrique
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Spain
| | - Marlon Bravo
- Laboratori d'Enginyeria de Proteïnes, Departament de Biologia, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 40, E-17003 Girona, Spain; Institut d'Investigació Biomèdica de Girona Dr. Josep Trueta, Girona, Spain
| | - Maria Vilanova
- Laboratori d'Enginyeria de Proteïnes, Departament de Biologia, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 40, E-17003 Girona, Spain; Institut d'Investigació Biomèdica de Girona Dr. Josep Trueta, Girona, Spain.
| | - Antoni Benito
- Laboratori d'Enginyeria de Proteïnes, Departament de Biologia, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 40, E-17003 Girona, Spain; Institut d'Investigació Biomèdica de Girona Dr. Josep Trueta, Girona, Spain
| | - Xavier Fontrodona
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Spain
| | - Montserrat Rodríguez
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Spain.
| | - Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, Campus de Montilivi, C/Maria Aurèlia Capmany, 69, E-17003 Girona, Spain.
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Lunagariya MV, Thakor KP, Varma RR, Waghela BN, Pathak C, Patel MN. Synthesis, characterization and biological application of 5-quinoline 1,3,5-trisubstituted pyrazole based platinum(ii) complexes. MEDCHEMCOMM 2017; 9:282-298. [PMID: 30108922 DOI: 10.1039/c7md00472a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/11/2017] [Indexed: 02/03/2023]
Abstract
Square planar mononuclear platinum(ii) complexes were synthesized in the presence of neutral bidentate heterocyclic (5-quinoline 1,3,5-tri-substituted pyrazole scaffold) ligands and K2PtCl4 salt. The synthesized compounds were characterized by micro-elemental analysis, FT-IR, UV-vis, 1H NMR, 13C NMR, TGA, mass spectrometry and molar conductivity. Their biological activities were investigated by in vitro brine shrimp lethality bioassay, in vitro antimicrobial study against five different pathogens, in vivo cellular level cytotoxicity against Schizosaccharomyces pombe cells, and in vitro anti-proliferation assay. The binding constant Ksv, Kb, Ka values of the complexes were determined by DNA interaction studies. The gel electrophoresis assay was carried out to examine the effect of the complexes on the DNA nuclease of pUC19 plasmid DNA. The docking energies of the ligands (L1-L5 ) and complexes (I-V) were observed in the range of -265.14 to -284.33 kJ mol-1. The synthesized Pt(ii) complexes (I-V) were screened against the MCF-7 (human breast adenocarcinoma) and HCT-116 (human colon carcinoma) cancer cell lines.
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Affiliation(s)
- Miral V Lunagariya
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Khyati P Thakor
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Reena R Varma
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
| | - Bhargav N Waghela
- Department of Cell Biology , School of Biological Sciences and Biotechnology , Indian Institute of Advanced Research , Koba Institutional Area , Gandhinagar-382007 , Gujarat , India . Tel: +91 79 30514245
| | - Chandramani Pathak
- Department of Cell Biology , School of Biological Sciences and Biotechnology , Indian Institute of Advanced Research , Koba Institutional Area , Gandhinagar-382007 , Gujarat , India . Tel: +91 79 30514245
| | - Mohan N Patel
- Department of Chemistry , Sardar Patel University , Vallabh Vidyanagar-388 120 , Gujarat , India . ; Tel: (+912692) 226856 218
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Amido-pincer complexes of Cu(II): Synthesis, coordination chemistry and applications in catalysis. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Hassani R, Kacem Y, Ben Mansour H, Ben Ammar H, Ben Hassine B. New chiral 4-substituted 2-cyanoethyl-oxazolines: synthesis and assessment of some biological activities. Chem Biol Interact 2014; 217:41-8. [PMID: 24727558 DOI: 10.1016/j.cbi.2014.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 03/12/2014] [Accepted: 04/02/2014] [Indexed: 11/28/2022]
Abstract
This paper describes the synthesis of new enantiomerically pure 2-cyanoethyl-oxazolines in one step starting from a wide range of amino alcohols and 4-ethoxy-4-iminobutanenitrile with high to good yields (73-96%) via an appropriate procedure which can be used for a selective synthesis of mono-oxazolines. A simple operation as well as a practical separation is additional eco-friendly attributes of this method. All the synthesized compounds were identified and characterized with their physicochemical features and their spectral data ((1)H NMR, (13)C NMR and TOFMS ES(+)). Among the prepared mono-oxazolines, the mono-oxazoline (3a) [3-[(4S)-4-benzyl-4,5-dihydro-1,3-oxazol-2-yl] propanenitrile] was tested to detect some biological activities. This compound was studied in vitro given the various types of pharmacological properties characterizing these compounds such as antioxidant, antimicrobial and analgesic activities. The antioxidant activity and mechanism of (3a) were identified using various in vitro antioxidant assays including 1,1-diphenyl-2-picryl-hydrazyl (DPPH), and superoxide anion radicals (O2(-)) scavenging activity. In addition, compared to Quercetin, the tested synthetic product reveals a relatively-strong antiradical activity towards the DPPH (activity percentage of 81.22%) free radicals and significantly decreased the reactive oxygen species such as (O2(-)) formation evaluated by the non-enzymatic (nitroblue tetrazolium/riboflavine) and the enzymatic (xanthine/xanthine oxidase) systems. Related activity values were, respectively, 66% and 60.30%. The oxazoline (3a) showed a high ability to reduce the O2(-) generation and proved to be a very potent radical scavenger. On the other hand, the analgesic property of the 3[(4S)-benzyl-4,5-dihydro-1,3-oxazol-2-yl] propanenitrile (3a) was demonstrated. The subcutaneous administration of (3a) produced a significant reduction in the number of abdominal constrictions amounting to 73.81% in the acetic acid writhing test in mice. In addition to these advances, the oxazoline (3a) has been investigated as an antimicrobial agent. Our results showed that this molecule exhibited various levels of antibacterial effect against all the tested bacterial strains.
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Affiliation(s)
- Rym Hassani
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène (UR11ES56), Faculté des Sciences, Avenue de l'environnement, 5019 Monastir, Tunisia
| | - Yakdhane Kacem
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène (UR11ES56), Faculté des Sciences, Avenue de l'environnement, 5019 Monastir, Tunisia
| | - Hedi Ben Mansour
- Laboratoire de biotechnologie et Valorisation de Bio Géo Ressources (LBVBGR), Institut Supérieur de Biotechnologie, ISBST BioTechPole Sidi Thabet Université Manouba, Ariana 2020, Tunisia
| | - Hamed Ben Ammar
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène (UR11ES56), Faculté des Sciences, Avenue de l'environnement, 5019 Monastir, Tunisia
| | - Béchir Ben Hassine
- Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène (UR11ES56), Faculté des Sciences, Avenue de l'environnement, 5019 Monastir, Tunisia.
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Alexandru MG, Cirkovic Velickovic T, Krstic M, Hrubaru MM, Draghici C. Two complexes of Co(II) and Pd(II) formed in reaction with a mono-oxazoline derivative. Spectroscopic characterization and cytotoxic evaluation. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.02.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Talancón D, López C, Font-Bardía M, Calvet T, Quirante J, Calvis C, Messeguer R, Cortés R, Cascante M, Baldomà L, Badia J. Diastereomerically pure platinum(II) complexes as antitumoral agents. J Inorg Biochem 2013; 118:1-12. [DOI: 10.1016/j.jinorgbio.2012.09.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 09/03/2012] [Accepted: 09/03/2012] [Indexed: 01/08/2023]
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Zibinsky M, Fokin VV. Sulfonyl-1,2,3-Triazoles: Convenient Synthones for Heterocyclic Compounds. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206388] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Zibinsky M, Fokin VV. Sulfonyl-1,2,3-Triazoles: Convenient Synthones for Heterocyclic Compounds. Angew Chem Int Ed Engl 2012; 52:1507-10. [DOI: 10.1002/anie.201206388] [Citation(s) in RCA: 205] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Indexed: 11/10/2022]
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Chen B, Wang N, Fan W, Ma S. Efficient synthesis of N-(buta-2,3-dienyl) amides from terminal N-propargyl amides and their synthetic potential towards oxazoline derivatives. Org Biomol Chem 2012; 10:8465-70. [DOI: 10.1039/c2ob26291f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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