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Mamdouh AA, Ibrahim ABM, Reyad NEHA, Elsayed TR, Santos IC, Paulo A, Mahfouz RM. (NH4)2[Co(H2O)6]2V10O28·4H2O Vs. (NH4)2[Ni(H2O)6]2V10O28·4H2O: Structural, Spectral and Thermal Analyses and Evaluation of Their Antibacterial Activities. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02326-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractThis paper presents the synthesis of two cluster compounds {(NH4)2[Co(H2O)6]2V10O28·4H2O (C1) and (NH4)2[Ni(H2O)6]2V10O28·4H2O (C2)} which were obtained as single crystals suitable for XRD analysis that revealed their crystallization in the monoclinic (C2/c) and triclinic (P-1) space groups, respectively. Additionally, C1 and C2 were characterized using CHN analysis and FT-IR spectroscopy and their thermal decomposition mechanisms were investigated. The antibacterial activities of both compounds were determined against three human pathogenic bacterial strains {Bacillus cereus ATCC 33,018, Escherichia coli O157:H7 and Pseudomonas aeruginosa ATCC 9027} and one phytopathogenic bacterial strain {Ralstonia solanacearum}, while drug standards {chloramphenicol and streptomycin} were used as control. The inhibitory activity and the minimum inhibitory concentration (MIC) values of the tested compounds clearly indicated higher antibacterial activities of the nickel compound against B. cereus ATCC 33,018, E. coli O157 and R. solanacearum with MIC values of 3.150, 3.150 and 6.300 mg/ml, respectively. On the other hand, (NH4)2[Co(H2O)6]2V10O28·4H2O exhibited higher antibacterial activity against P. aeruginosa ATCC 9027 (MIC value of 6.300 mg/ml) in comparison to the nickel analog. In general, the measured activities are lower than that obtained for the standards except for the higher activity given by C2 in comparison to streptomycin against the R. solanacearum strain.
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Houari B, Louhibi S, Tizaoui K, Boukli-hacene L, Benguella B, Roisnel T, Dorcet V. New synthetic material removing heavy metals from aqueous solutions and wastewater. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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3
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Characterizations of crystalline structure and catalytic activity of zwitterionic imidazole derivatives. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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4
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Dhanwe VP, Joshi PG, Kshirsagar AS, Dhapte VV, Khanna PK. Synthesis, Characterization and Nanochemistry of Novel Antibacterial Copper (II) Semicarbazone Complexes. ChemistrySelect 2018. [DOI: 10.1002/slct.201800547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Vaishali P. Dhanwe
- Department of Applied ChemistryDefence Institute of Advanced Technology, Girinagar 411025, Pune India
| | - Prasad G. Joshi
- Department of Applied ChemistryDefence Institute of Advanced Technology, Girinagar 411025, Pune India
| | - Anuraj S. Kshirsagar
- Department of Applied ChemistryDefence Institute of Advanced Technology, Girinagar 411025, Pune India
| | - Vividha V. Dhapte
- Department of PharmaceuticsBharati Vidyapeeth UniversityPoona College of Pharmacy, Erandwane, Pune India
| | - Pawan K. Khanna
- Department of Applied ChemistryDefence Institute of Advanced Technology, Girinagar 411025, Pune India
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Gatti A, Habtemariam A, Romero-Canelón I, Song JI, Heer B, Clarkson GJ, Rogolino D, Sadler PJ, Carcelli M. Half-Sandwich Arene Ruthenium(II) and Osmium(II) Thiosemicarbazone Complexes: Solution Behavior and Antiproliferative Activity. Organometallics 2018; 37:891-899. [PMID: 29681675 PMCID: PMC5908187 DOI: 10.1021/acs.organomet.7b00875] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 11/29/2022]
Abstract
We report the synthesis, characterization, and antiproliferative activity of organo-osmium(II) and organo-ruthenium(II) half-sandwich complexes [(η6-p-cym)Os(L)Cl]Cl (1 and 2) and [(η6-p-cym)Ru(L)Cl]Cl (3 and 4), where L = N-(2-hydroxy)-3-methoxybenzylidenethiosemicarbazide (L1) or N-(2,3-dihydroxybenzylidene)-3-phenylthiosemicarbazide (L2), respectively. X-ray crystallography showed that all four complexes possess half-sandwich pseudo-octahedral "three-legged piano-stool" structures, with a neutral N,S-chelating thiosemicarbazone ligand and a terminal chloride occupying three coordination positions. In methanol, E/Z isomerization of the coordinated thiosemicarbazone ligand was observed, while in an aprotic solvent like acetone, partial dissociation of the ligand occurs, reaching complete displacement in a more coordinating solvent like DMSO. In general, the complexes exhibited good activity toward A2780 ovarian, A2780Cis cisplatin-resistant ovarian, A549 lung, HCT116 colon, and PC3 prostate cancer cells. In particular, ruthenium complex 3 does not present cross-resistance with the clinical drug cisplatin in the A2780 human ovarian cancer cell line. The complexes were more active than the free thiosemicarbazone ligands, especially in A549 and HCT116 cells with potency improvements of up to 20-fold between organic ligand L1 and ruthenium complex 1.
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Affiliation(s)
- Anna Gatti
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
and CIRCMSB (Consorzio Interuniversitario di Ricerca in Chimica dei
Metalli nei Sistemi Biologici), University
of Parma, Parco Area
delle Scienze 11/A, 43124 Parma, Italy
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Abraha Habtemariam
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Isolda Romero-Canelón
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
- School
of Pharmacy, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Ji-Inn Song
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Bindy Heer
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Guy J. Clarkson
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Dominga Rogolino
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
and CIRCMSB (Consorzio Interuniversitario di Ricerca in Chimica dei
Metalli nei Sistemi Biologici), University
of Parma, Parco Area
delle Scienze 11/A, 43124 Parma, Italy
| | - Peter J. Sadler
- Department
of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom
| | - Mauro Carcelli
- Dipartimento
di Scienze Chimiche, della Vita e della Sostenibilità Ambientale
and CIRCMSB (Consorzio Interuniversitario di Ricerca in Chimica dei
Metalli nei Sistemi Biologici), University
of Parma, Parco Area
delle Scienze 11/A, 43124 Parma, Italy
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6
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Synthesis, structural and biological studies of two new Co(III) complexes with tridentate hydrazone ligand derived from the antihypertensive drug hydralazine. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.05.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Shalash AM, Abu Ali HI. Synthesis, crystallographic, spectroscopic studies and biological activity of new cobalt(II) complexes with bioactive mixed sulindac and nitrogen-donor ligands. Chem Cent J 2017; 11:40. [PMID: 29086831 PMCID: PMC5423883 DOI: 10.1186/s13065-017-0268-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 05/03/2017] [Indexed: 01/09/2023] Open
Abstract
Four novel complexes [Co(H2O)4(sul)2] 1, [Co(2-ampy)2(sul)2] 2, [Co(H2O)2(1,10-phen) (sul)2] 3 and [Co(2,9-dimephen)(sul)2] 4 (sul = sulindac, 2-ampy = 2-amino pyridine, 1,10-phen = 1,10-phenanthroline and 2,9-dimeph = 2,9-dimethyl-1,10-phenanthroline) were prepared and characterized by IR, UV-Visible spectroscopy and magnetic properties. The crystal structures of complexes 1 and 4 were determined by single-crystal X-ray diffraction. In-vitro anti-bacterial activity for the prepared complexes against Gram-positive (Staphylococcus epidermidis, Staphylococcus aureus) and Gram-negative (Bordetella, Escherichia coli) bacteria and Yeast species (Saccharomyces and Candida) were performed using agar well-diffusion method. Only complex 4 showed reasonable activity against yeast. All compounds showed more anti-bacterial activity against Gram-positive bacteria than Gram-negative. Graphical abstract This work reports synthesis, crystallographic, spectroscopic studies and biological activity of new cobalt(II) complexes with bioactive mixed sulindac and nitrogen-donor ligands. The crystal structures of complexes 1 and 4 were determined using single-crystal X-ray diffraction. In-vitro anti-bacterial activity of the prepared complexes and their parent ligands were investigated against different Gram-positive and Gram-negative bacteria using agar diffusion method.
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Affiliation(s)
- Asia M. Shalash
- Department of Chemistry, Birzeit University, P.O. Box 14, West Bank, Palestine
| | - Hijazi I. Abu Ali
- Department of Chemistry, Birzeit University, P.O. Box 14, West Bank, Palestine
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Synthesis, characterization and in vitro biological activities of new water-soluble copper(II), zinc(II), and nickel(II) complexes with sulfonato-substituted Schiff base ligand. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.01.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Saito R, Tamura M, Kawano S, Yoshikawa Y, Kato A, Sasaki K, Yasui H. Synthesis and biological evaluation of 4-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-3-carboxamides and their zinc(ii) complexes as candidate antidiabetic agents. NEW J CHEM 2017. [DOI: 10.1039/c7nj00970d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five new zinc(ii) complexes with 4-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-3-carboxamides were synthesized, and four of them exhibited insulin-mimetic activity in vitro.
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Affiliation(s)
- Ryota Saito
- Department of Chemistry
- Toho University
- Chiba 274-8510
- Japan
- Research Center for Materials with Integrated Properties
| | - Moe Tamura
- Department of Chemistry
- Toho University
- Chiba 274-8510
- Japan
| | - Saya Kawano
- Department of Chemistry
- Toho University
- Chiba 274-8510
- Japan
| | - Yutaka Yoshikawa
- Department of Health
- Sports and Nutrition
- Kobe Women's University
- Kobe 650-0046
- Japan
| | - Akihiro Kato
- Department of Chemistry
- Toho University
- Chiba 274-8510
- Japan
| | - Kaname Sasaki
- Department of Chemistry
- Toho University
- Chiba 274-8510
- Japan
| | - Hiroyuki Yasui
- Department of Analytical and Bioinorganic Chemistry
- Kyoto Pharmaceutical University
- Kyoto 607-8414
- Japan
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Chen H, Ma XQ, Lv YY, Jia L, Xu J, Wang Y, Ge ZJ. Four transition metal complexes with a semicarbazone ligand bearing pyrazine unit. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.12.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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11
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Al-Khodir FAI, Refat MS. Synthesis, spectroscopic, thermal analyses, and anti-cancer studies of metalloantibiotic complexes of Ca(II), Zn(II), Pt(II), Pd(II), and Au(III) with albendazole drug. RUSS J GEN CHEM+ 2015. [DOI: 10.1134/s1070363215070270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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12
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Yildirim H, Guler E, Yavuz M, Ozturk N, Kose Yaman P, Subasi E, Sahin E, Timur S. Ruthenium (II) complexes of thiosemicarbazone: Synthesis, biosensor applications and evaluation as antimicrobial agents. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 44:1-8. [DOI: 10.1016/j.msec.2014.08.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 07/03/2014] [Accepted: 08/01/2014] [Indexed: 10/24/2022]
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13
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Das M, Ghosh BN, Rissanen K, Chattopadhyay S. Anion modulated structural variations in copper(II) complexes with a semicarbazone Schiff base: Synthesis, characterization and self assembly. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.03.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Ranjith PK, Pakkath R, Haridas KR, Kumari SN. Synthesis and characterization of new N-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenyl)amide/sulfonamide derivatives as possible antimicrobial and antitubercular agents. Eur J Med Chem 2013; 71:354-65. [PMID: 24361479 DOI: 10.1016/j.ejmech.2013.11.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 09/28/2013] [Accepted: 11/03/2013] [Indexed: 11/19/2022]
Abstract
In this paper we report the SAR studies of a series of N-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenyl)amide and N-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenyl)sulfonamide derivatives 6(a-o) and 7(a-o), were synthesized in good yields and characterized by (1)H NMR, (13)C NMR and mass spectral analyses. The preparation of the key intermediate highlights an optimized palladium catalyzed (Pd₂(dba)₃/RuPhos) Buchwald cross-coupling of intermediate 2 and 3. The newly synthesized compounds were evaluated for their in vitro antibacterial activity against Staphylococcus aureus, (Gram-positive), Escherichia coli and Klebsiella pneumoniae (Gram-negative), antifungal activity against Candida albicans, Aspergillus flavus and Rhizopus sp. and antitubercular activity against Mycobacterium tuberculosis H37Rv, Mycobacterium smegmatis, Mycobacterium fortuitum and MDR-TB strains. The synthesized compounds displayed interesting antimicrobial activity. The compounds 7d, 7f, 7h and 7n displayed significant activity against Mycobacterium tuberculosis H37Rv strain.
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Affiliation(s)
- Pakkath Karuvalam Ranjith
- School of Chemical Sciences, Kannur University, Payyanur Campus, Edat P.O., 670327 Kannur, Kerala, India.
| | - Rajeesh Pakkath
- School of Chemical Sciences, Kannur University, Payyanur Campus, Edat P.O., 670327 Kannur, Kerala, India
| | - Karickal R Haridas
- School of Chemical Sciences, Kannur University, Payyanur Campus, Edat P.O., 670327 Kannur, Kerala, India.
| | - Suchetha N Kumari
- Department of Biochemistry, Justice K.S. Hegde Medical Academy, Deralakatte, India
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Shaabani B, Khandar AA, Mahmoudi F, Balula SS, Cunha-Silva L. Synthesis, structure and electrochemistry behavior of a cobalt(III) compound with azide and methyl 2-pyridyl ketone semicarbazone ligands. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.03.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Shaabani B, Khandar AA, Mahmoudi F, Maestro MA, Balula SS, Cunha-Silva L. Novel binuclear Cu(II) complexes combining a semicarbazone Schiff base with distinct bridging ligands: Structure and antimicrobial activity. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.04.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Afrasiabi Z, Almudhafar R, Xiao D, Sinn E, Choudhury A, Ahmad A, Vyas A, Sarkar F, Padhye S. Metal-based anticancer agents: targeting androgen-dependent and androgen-independent prostate and COX-positive pancreatic cancer cells by phenanthrenequinone semicarbazone and its metal complexes. TRANSIT METAL CHEM 2013. [DOI: 10.1007/s11243-013-9735-3] [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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18
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Zhang L, Peng XM, Damu GLV, Geng RX, Zhou CH. Comprehensive review in current developments of imidazole-based medicinal chemistry. Med Res Rev 2013; 34:340-437. [PMID: 23740514 DOI: 10.1002/med.21290] [Citation(s) in RCA: 473] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Imidazole ring is an important five-membered aromatic heterocycle widely present in natural products and synthetic molecules. The unique structural feature of imidazole ring with desirable electron-rich characteristic is beneficial for imidazole derivatives to readily bind with a variety of enzymes and receptors in biological systems through diverse weak interactions, thereby exhibiting broad bioactivities. The related research and developments of imidazole-based medicinal chemistry have become a rapidly developing and increasingly active topic. Particularly, numerous imidazole-based compounds as clinical drugs have been extensively used in the clinic to treat various types of diseases with high therapeutic potency, which have shown the enormous development value. This work systematically gives a comprehensive review in current developments of imidazole-based compounds in the whole range of medicinal chemistry as anticancer, antifungal, antibacterial, antitubercular, anti-inflammatory, antineuropathic, antihypertensive, antihistaminic, antiparasitic, antiobesity, antiviral, and other medicinal agents, together with their potential applications in diagnostics and pathology. It is hoped that this review will be helpful for new thoughts in the quest for rational designs of more active and less toxic imidazole-based medicinal drugs, as well as more effective diagnostic agents and pathologic probes.
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Affiliation(s)
- Ling Zhang
- Laboratory of Bioorganic & Medicinal Chemistry, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
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Alomar K, Gaumet V, Allain M, Bouet G, Landreau A. Synthesis, crystal structure, characterisation, and antifungal activity of 3-thiophene aldehyde semicarbazone (3STCH), 2,3-thiophene dicarboxaldehyde bis(semicarbazone) (2,3BSTCH2) and their nickel (II) complexes. J Inorg Biochem 2012; 115:36-43. [DOI: 10.1016/j.jinorgbio.2012.04.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 04/23/2012] [Accepted: 04/24/2012] [Indexed: 10/28/2022]
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Molecular structures and spectroscopic characterization of cobalt(III) and nickel(II) complexes of N-(2-hydroxyethyl)-2-(thiophene-2-ylmethylene)-hydrazinecarbothioamide. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9417-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Lázaro Martínez JM, Romasanta PN, Chattah AK, Buldain GY. NMR characterization of hydrate and aldehyde forms of imidazole-2-carboxaldehyde and derivatives. J Org Chem 2010; 75:3208-13. [PMID: 20405932 DOI: 10.1021/jo902588s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The existence and stability of the aldehyde-hydrate form of imidazole-2-carboxaldehyde (4) were studied using FTIR together with solution- and solid-state NMR experiments. The results allowed us to conclude that the hydrate form was stable and precipitated at pH = 8.0 and that the aldehyde form was isolated at pH = 6.5 and 9.5. Moreover, the presence of the aldehyde-hydrate form was studied through NMR experiments in D(2)O at both alkaline and acidic pH. In addition, the tautomeric forms of the 2-substituted imidazole compounds were also analyzed to investigate the influence of the hybridization on the carbon adjacent to the imidazole ring, by (13)C NMR in DMSO-d(6), acetone-d(6), and CDCl(3). The presence of the syn- and anti-isomers of oxime 8 obtained from 4 were characterized by solid-state NMR and variable-temperature NMR experiments in acetone-d(6).
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Affiliation(s)
- Juan Manuel Lázaro Martínez
- Departamento de Química Orgánica, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Junin 956 (C1113AAD), Ciudad Autónoma de Buenos Aires, Argentina
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Reena TA, Kurup MRP. Copper(II) complexes derived from di-2-pyridyl ketone-N(4)-phenyl-3-semicarbazone: Synthesis and spectral studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 76:322-327. [PMID: 20457004 DOI: 10.1016/j.saa.2010.03.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Revised: 02/27/2010] [Accepted: 03/15/2010] [Indexed: 05/29/2023]
Abstract
Five copper(II) complexes [CuLCl](2).CuCl(2).4H(2)O (1), [CuLOAc] (2), [CuLNO(3)](2) (3), [CuLN(3)] (4) and [CuLNCS].3/2H(2)O (5) of di-2-pyridyl ketone-N(4)-phenyl-3-semicarbazone (HL) were synthesized and characterized by elemental analyses and electronic, infrared and EPR spectral techniques. In all these complexes the semicarbazone undergoes deprotonation and coordinates through enolate oxygen, azomethine and pyridyl nitrogen atoms. All the complexes are EPR active due to the presence of an unpaired electron. EPR spectra of all the complexes in DMF at 77K suggest axial symmetry and the presence of half field signals for the complexes 1 and 3 indicates dimeric structures.
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Affiliation(s)
- T A Reena
- Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, Kerala, India
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