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Costa DP, Castro AC, Silva GA, Lima‐Junior CG, Andrade Júnior FP, Oliveira Lima E, Vaz BG, Silva LC. Microwave‐assisted synthesis and antimicrobial activity of novel spiro 1,3,4‐thiadiazolines from isatin derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Aleff Cruz Castro
- Department of Chemistry Federal University of Paraíba João Pessoa Brazil
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2
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Markiewicz KH, Misztalewska-Turkowicz I, Niemirowicz K, Bucki R, Majcher AM, Wilczewska AZ. Carbamohydrazonothioate-based polymer-magnetic nanohybrids: Fabrication, characterization and bactericidal properties. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.12.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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3
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Noorussabah N, Choudhary M, Jana A, Das N, Mohan B, Ahmad K, Sangeeta S, Bharti S, Mishra MK, Sharma SR. Synthesis, characterizations, crystal structures, BSA-binding, molecular docking, and cytotoxic activities of nickel(II) and copper(II) coordination complexes with bidentate N,S-chelating ligand. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1602867] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- N. Noorussabah
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - Mukesh Choudhary
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - Achintya Jana
- Department of chemistry, Indian Institute of Technology Patna, Patna, India
| | - Neeladri Das
- Department of chemistry, Indian Institute of Technology Patna, Patna, India
| | - B. Mohan
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - K. Ahmad
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - S. Sangeeta
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - S. Bharti
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - M. K. Mishra
- Department of Chemistry, National Institute of Technology Patna, Patna, India
| | - S. R. Sharma
- Department of Chemistry, National Institute of Technology Patna, Patna, India
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4
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Britta EA, da Silva CC, Rubira AF, Nakamura CV, Borsali R. Generating nanoparticles containing a new 4-nitrobenzaldehyde thiosemicarbazone compound with antileishmanial activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:1159-66. [DOI: 10.1016/j.msec.2016.08.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/22/2016] [Accepted: 08/07/2016] [Indexed: 11/29/2022]
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5
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Carbamohydrazonothioate derivative—experimental and theoretical explorations of the crystal and molecular structure. Struct Chem 2016. [DOI: 10.1007/s11224-016-0874-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Rajam A, Thomas Muthiah P, Butcher RJ, Zeller M. Crystal structure of 4-amino-5-chloro-2,6-di-methyl-pyrimidinium thio-phene-2,5-di-carboxyl-ate. Acta Crystallogr E Crystallogr Commun 2016; 72:1043-6. [PMID: 27555959 PMCID: PMC4992934 DOI: 10.1107/s2056989016010148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 06/21/2016] [Indexed: 11/10/2022]
Abstract
In the title salt, C6H9ClN3 (+)·C6H3O4S(-), the cations and anions are linked via O-H⋯O and N-H⋯O hydrogen bonds, forming R 6 (6)(37) ring motifs that are inter-connected with each other, producing sheets. Separate parallel inversion-related sheets are linked through N-H⋯N and π-π stacking inter-actions [centroid-centroid distance = 3.5414 (13) Å], forming double layers parallel to (101). Weak C-H⋯O and C-H⋯S hydrogen bonds, as well as C-H⋯π inter-actions, connect the double layers into a three-dimensional network.
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Affiliation(s)
- Ammaiyappan Rajam
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | | | - Ray J. Butcher
- Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
| | - Matthias Zeller
- Department of Chemistry, Youngstown State University, 1 University Plaza, Youngstown, OH 44555, USA
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7
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Karthikeyan A, Thomas Muthiah P, Perdih F. Supramolecular architectures in Co(II) and Cu(II) complexes with thiophene-2-carboxylate and 2-amino-4,6-dimethoxypyrimidine ligands. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2016; 72:442-50. [PMID: 27146575 DOI: 10.1107/s2053229616006148] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/12/2016] [Indexed: 01/21/2023]
Abstract
The coordination chemistry of mixed-ligand complexes continues to be an active area of research since these compounds have a wide range of applications. Many coordination polymers and metal-organic framworks are emerging as novel functional materials. Aminopyrimidine and its derivatives are flexible ligands with versatile binding and coordination modes which have been proven to be useful in the construction of organic-inorganic hybrid materials and coordination polymers. Thiophenecarboxylic acid, its derivatives and their complexes exhibit pharmacological properties. Cobalt(II) and copper(II) complexes of thiophenecarboxylate have many biological applications, for example, as antifungal and antitumor agents. Two new cobalt(II) and copper(II) complexes incorporating thiophene-2-carboxylate (2-TPC) and 2-amino-4,6-dimethoxypyrimidine (OMP) ligands have been synthesized and characterized by X-ray diffraction studies, namely (2-amino-4,6-dimethoxypyrimidine-κN)aquachlorido(thiophene-2-carboxylato-κO)cobalt(II) monohydrate, [Co(C5H3O2S)Cl(C6H9N3O2)(H2O)]·H2O, (I), and catena-poly[copper(II)-tetrakis(μ-thiophene-2-carboxylato-κ(2)O:O')-copper(II)-(μ-2-amino-4,6-dimethoxypyrimidine-κ(2)N(1):N(3))], [Cu2(C5H3O2S)4(C6H9N3O2)]n, (II). In (I), the Co(II) ion has a distorted tetrahedral coordination environment involving one O atom from a monodentate 2-TPC ligand, one N atom from an OMP ligand, one chloride ligand and one O atom of a water molecule. An additional water molecule is present in the asymmetric unit. The amino group of the coordinated OMP molecule and the coordinated carboxylate O atom of the 2-TPC ligand form an interligand N-H...O hydrogen bond, generating an S(6) ring motif. The pyrimidine molecules also form a base pair [R2(2)(8) motif] via a pair of N-H...N hydrogen bonds. These interactions, together with O-H...O and O-H...Cl hydrogen bonds and π-π stacking interactions, generate a three-dimensional supramolecular architecture. The one-dimensional coordination polymer (II) contains the classical paddle-wheel [Cu2(CH3COO)4(H2O)2] unit, where each carboxylate group of four 2-TPC ligands bridges two square-pyramidally coordinated Cu(II) ions and the apically coordinated OMP ligands bridge the dinuclear copper units. Each dinuclear copper unit has a crystallographic inversion centre, whereas the bridging OMP ligand has crystallographic twofold symmetry. The one-dimensional polymeric chains self-assemble via N-H...O, π-π and C-H...π interactions, generating a three-dimensional supramolecular architecture.
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Affiliation(s)
- Ammasai Karthikeyan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India
| | | | - Franc Perdih
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, PO Box 537, SI-1000 Ljubljana, Slovenia
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8
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Markiewicz KH, Zembko P, Półtorak K, Misztalewska I, Wojtulewski S, Majcher AM, Fornal E, Wilczewska AZ. Magnetic nanoparticles with chelating shells prepared by RAFT/MADIX polymerization. NEW J CHEM 2016. [DOI: 10.1039/c6nj01938b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Complexing and easily separable polymer–magnetic nanohybrids based on iron oxide nanoparticles and original carbamohydrazonothioate derivatives.
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Affiliation(s)
| | - Paula Zembko
- Institute of Chemistry
- University of Bialystok
- 15-245 Bialystok
- Poland
| | | | | | | | - Anna M. Majcher
- Jagiellonian University
- Faculty of Physics
- Astronomy and Applied Computer Science
- 30-348 Cracow
- Poland
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Gudasi KB, Patil SA, Bakale RP, Nethaji M. Ligational behaviour of (E)-2-amino-N′-[1-(2-hydroxyphenyl)ethylidene]benzohydrazide towards later 3d metal ions: X-ray crystal structure of nickel(IV) complex. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Juneja A, Macedo TS, Magalhaes Moreira DR, Pereira Soares MB, Lima Leite AC, Kelle de Andrade Lemoine Neves J, Alves Pereira VR, Avecilla F, Azam A. Synthesis of 4'-(2-ferrocenyl)-2,2':6'2''-terpyridine: characterization and antiprotozoal activity of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes. Eur J Med Chem 2014; 75:203-10. [PMID: 24534536 DOI: 10.1016/j.ejmech.2014.01.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/14/2014] [Accepted: 01/18/2014] [Indexed: 01/28/2023]
Abstract
A terpyridine ligand Fctpy was reacted with divalent metals (Cu, Co, Mn, Ni and Zn), yielding five complexes of general formula [Metal(Fctpy)2][PF6]2. The structure of Fctpy was determined by single crystal X-ray diffraction studies. The complexes characterized using various spectroscopic techniques suggested an octahedral geometry around the central metal ion. These complexes were screened for their antiamoebic, trypanocidal and antimalarial activities. It was found that, complexes 2 and 3 showed better IC50 values than metronidazole against HM1:IMSS strain of Entamoeba histolytica. A substantial parasitic inhibition was not observed for the trypanocidal activity. However, for the erythrocytic stage of W2 strain of Plasmodium falciparum, the complexes inhibited β-hematin formation. At the concentration of 10 μg/mL, these complexes did not display toxicity.
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Affiliation(s)
- Annu Juneja
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
| | - Tais Soares Macedo
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil
| | - Diogo Rodrigo Magalhaes Moreira
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil; Centro de Biotecnologia e Terapia Celular, Hospital São Rafael. Av. São Rafael, 2152, São Marcos, 41253-190 Salvador, BA, Brazil
| | - Milena Botelho Pereira Soares
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Rua Waldemar Falcão, 121, Candeal, 40296-710 Salvador, BA, Brazil; Centro de Biotecnologia e Terapia Celular, Hospital São Rafael. Av. São Rafael, 2152, São Marcos, 41253-190 Salvador, BA, Brazil
| | - Ana Cristina Lima Leite
- Department of Pharmaceutical Sciences, Centre for Health Sciences, Federal University of Pernambuco, 50740-520 Recife, PE, Brazil
| | | | - Valeria Rego Alves Pereira
- Departamento de Imunologia, Centro de Pesquisas Aggeu Magalhães, Fundação Oswaldo Cruz, 50670-420 Recife, PE, Brazil
| | - Fernando Avecilla
- Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira s/n, 15071 A Coruña, Spain
| | - Amir Azam
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India.
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Krogul A, Cedrowski J, Wiktorska K, Oziminski WP, Skupińska J, Litwinienko G. Biological activity of Pd(II) complexes with mono- and disubstituted pyridines—Experimental and theoretical studies. Bioorg Med Chem Lett 2013; 23:2765-8. [DOI: 10.1016/j.bmcl.2013.02.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Revised: 02/06/2013] [Accepted: 02/11/2013] [Indexed: 10/27/2022]
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12
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Siddiqui SM, Salahuddin A, Azam A. Thiosemicarbazone fragment embedded within 1,2,4-triazole ring as inhibitors of Entamoeba histolytica. Bioorg Med Chem Lett 2012; 22:2768-71. [DOI: 10.1016/j.bmcl.2012.02.084] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Revised: 02/23/2012] [Accepted: 02/24/2012] [Indexed: 11/26/2022]
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13
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Siddiqui SM, Salahuddin A, Azam A. Synthesis, characterization and antiamoebic activity of some hydrazone and azole derivatives bearing pyridyl moiety as a promising heterocyclic scaffold. Eur J Med Chem 2012; 49:411-6. [DOI: 10.1016/j.ejmech.2012.01.030] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 12/27/2011] [Accepted: 01/14/2012] [Indexed: 11/27/2022]
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14
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Bahl D, Athar F, Soares MBP, de Sá MS, Moreira DRM, Srivastava RM, Leite ACL, Azam A. Structure–activity relationships of mononuclear metal–thiosemicarbazone complexes endowed with potent antiplasmodial and antiamoebic activities. Bioorg Med Chem 2010; 18:6857-64. [DOI: 10.1016/j.bmc.2010.07.039] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Accepted: 07/16/2010] [Indexed: 02/01/2023]
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Mahmoud RF, Janiak C. Aqua-(2,2'-bipyridine-κN,N')bis-(thio-phene-2-carboxyl-ato-κO)copper(II). Acta Crystallogr Sect E Struct Rep Online 2009; 65:m909-10. [PMID: 21583368 PMCID: PMC2977207 DOI: 10.1107/s1600536809026713] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 07/08/2009] [Indexed: 11/10/2022]
Abstract
In the title complex, [Cu(C(5)H(3)O(2)S)(2)(C(10)H(8)N(2))(H(2)O)], the Cu(II) atom is in a distorted square-pyramidal environment, with an Addison τ parameter of 0.07. The coordination geometry is defined by two nitro-gen donors from the 2,2'-bipyridine ligand, two O atoms from two monodentate thio-phene-2-carboxyl-ate ligands and one O atom from the aqua ligand. The latter occupies the elongated apical position. This is different from the related structure of aqua-(1,10-phenanthroline)bis-(thio-phene-2-carboxyl-ato)copper(II) where a carboxyl-ate O atom is in the apical position [Feng et al. (2005 ▶). Z. Kristallogr. New Cryst. Struct.220, 429-430]. The uncoordinated carboxyl-ate O atoms form intra- and inter-molecular hydrogen bonds to the aqua ligand. Two neighbouring 2,2'-bipyridine ligands form a π-stack, with a centroid-centroid distance of 3.683 (2) Å.
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Affiliation(s)
- Reda F Mahmoud
- Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
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16
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Palladium coordination compounds as anti-viral, anti-fungal, anti-microbial and anti-tumor agents. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2008.09.011] [Citation(s) in RCA: 365] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh S, Bharti N, Mohapatra PP. Chemistry and Biology of Synthetic and Naturally Occurring Antiamoebic Agents. Chem Rev 2009; 109:1900-47. [DOI: 10.1021/cr068217k] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shailendra Singh
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
| | - Neelam Bharti
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
| | - Prabhu P. Mohapatra
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, and Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611
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Synthesis, characterization, and in vitro cytotoxic activities of benzaldehyde thiosemicarbazone derivatives and their palladium (II) and platinum (II) complexes against various human tumor cell lines. Bioinorg Chem Appl 2009:690952. [PMID: 19148285 PMCID: PMC2615113 DOI: 10.1155/2008/690952] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Accepted: 10/17/2008] [Indexed: 11/21/2022] Open
Abstract
The palladium (II) bis-chelate Pd (L1−3)2 and platinum (II) tetranuclear Pt4(L4)4 complexes of benzaldehyde thiosemicarbazone derivatives have been synthesized, and characterized by elemental analysis and IR, FAB(+)-mass and NMR (1H, 13C) spectroscopy. The complex Pd(L2)2 [HL2 = m-CN-benzaldehyde thiosemicarbazone] shows a square-planar geometry with two deprotonated ligands (L) coordinated to PdII through the nitrogen and sulphur atoms in a transarrangement, while the complex Pt4(L4)4 [HL4 = 4-phenyl-1-benzaldehyde thiosemicarbazone] has a tetranuclear geometry with four tridentate ligands coordinated to four PtII ions through the carbon (aromatic ring), nitrogen, and sulphur atoms where the ligands are deprotonated at the NH group. The in vitro antitumor activity of the ligands and their complexes was determined against different human tumor cell lines, which revealed that the palladium (II) and platinum (II) complexes are more cytotoxic than their ligands with IC50 values at the range of 0.07–3.67 μM. The tetranuclear complex Pt4(L4)4, with the phenyl group in the terminal amine of the ligand, showed higher antiproliferative activity (CI50 = 0.07–0.12 μM) than the other tested palladium (II) complexes.
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Mohanan K, Thankamony M, Kumari BS. Synthesis, spectroscopic characterization, and thermal decomposition kinetics of some lanthanide(III) nitrate complexes of 2-(N-o-hydroxyacetophenone)amino-3-carboxyethyl-4,5,6,7-tetrahydrobenzo[b]thiophene. J RARE EARTH 2008. [DOI: 10.1016/s1002-0721(08)60119-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Husain K, Abid M, Azam A. Synthesis, characterization and antiamoebic activity of new indole-3-carboxaldehyde thiosemicarbazones and their Pd(II) complexes. Eur J Med Chem 2007; 42:1300-8. [PMID: 17442460 DOI: 10.1016/j.ejmech.2007.02.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2007] [Accepted: 02/19/2007] [Indexed: 10/23/2022]
Abstract
In continuation of our research on thiosemicarbazones and their metal complexes as antiamoebic agents, a new series of indole-3-carboxaldehyde thiosemicarbazones (TSC) 1-7 were prepared by condensing indole-3-carboxaldehyde with cycloalkylaminothiocarbonyl hydrazines. Their palladium(II) complexes of the [Pd(TSC)Cl2] type, were synthesized upon coordination with [Pd(DMSO)2Cl2]. The chemical structures of all the compounds were established by elemental analyses, electronic, IR, (1)H NMR and (13)C NMR spectral data. The structure of the complexes was further established by thermogravimetric analysis and FAB MS. Spectroscopic data revealed that thiosemicarbazones act as bidentate ligands, making use of thione sulphur and azomethine nitrogen atom for coordination to the Pd(II) ion. Among all the compounds evaluated for antiamoebic activity using HM1:IMSS strain of Entamoeba histolytica, all palladium complexes were found to be more active than their respective ligands. Moreover, ligand 5 and complexes 1a-3a, 5a and 7a showed antiamoebic activity, at lower IC(50) doses when compared to the reference drug metronidazole with IC(50)=1.81 microM.
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Affiliation(s)
- Kakul Husain
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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Otero L, Aguirre G, Boiani L, Denicola A, Rigol C, Olea-Azar C, Maya JD, Morello A, González M, Gambino D, Cerecetto H. Nitrofurylsemicarbazone Rhenium and Ruthenium Complexes as Anti-trypanosomal Agents. Eur J Med Chem 2006; 41:1231-9. [PMID: 16828524 DOI: 10.1016/j.ejmech.2006.05.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/11/2006] [Accepted: 05/18/2006] [Indexed: 11/29/2022]
Abstract
Rhenium and ruthenium complexes of the type [Re(V)OCl(2)(PPh(3))L] and [Ru(II)Cl(2)(DMSO)(2)L], where L are 5-nitrofurylsemicarbazone derivatives, were prepared in an effort to obtain new anti-trypanosomal agents combining the recognized biological activity of these metals and the trypanocidal activity of the free ligands. Rhenium complexes resulted unstable in aqueous solution not allowing their use as potential drugs. On the other hand, complexation to ruthenium of the bioactive ligands lead to the lack of antiprotozoa activity even though free radical production and redox cycling induction were detected when the compounds were incubated in presence of Trypanosoma cruzi cells. The lack of anti-trypanosomal activity of ruthenium complexes could be explained on the basis of their high protein binding capacity and their high hydrophilicity.
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Affiliation(s)
- Lucía Otero
- Cátedra de Química Inorgánica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay
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Gudasi KB, Shenoy RV, Vadavi RS, Patil SA, Nethaji M. X-ray crystallographic and 2D HETCOR NMR studies of 2-acetylthiophene-o-aminobenzoylhydrazone: synthesis and spectral studies of its transition metal complexes. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.11.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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23
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Singh S, Athar F, Maurya MR, Azam A. Cyclooctadiene Ru(II) complexes of thiophene-2-carboxaldehyde-derived thiosemicarbazones: synthesis, characterization and antiamoebic activity. Eur J Med Chem 2006; 41:592-8. [PMID: 16545496 DOI: 10.1016/j.ejmech.2006.01.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 01/12/2006] [Accepted: 01/12/2006] [Indexed: 10/24/2022]
Abstract
Thiosemicarbazones (TSC) 1-10 were synthesized by condensing substituted thiosemicarbazide with thiophene-2-carboxaldehyde. These thiosemicarbazones were further reacted with [Ru(eta4-C8H12)(CH3CN)2Cl2] to form complexes of the type [Ru(eta4-C8H12)(TSC)Cl2] 1a-10a. Thiosemicarbazones exhibited antiamoebic activity in the range IC50=1.09-5.42 microM. In vitro assessment of antiamoebic activity indicated that the thiosemicarbazones 3, IC50=1.67 microM, 4, IC50=1.11 microM and 6, IC50=1.09 microM showed substantially less IC50 value than metronidazole (IC50=1.87 microM), a commonly used drug against amoebiasis. Cyclooctadiene Ru(II) complexes of thiosemicarbazones showed significant improvement in antiamoebic activity (IC50=0.30-1.39 microM). All the complexes possess noteworthy potencies and showed less IC50 values than metronidazole against HK-9 strain of Entamoeba histolytica. Among all the complexes, the most promising antiamoebic activities was shown by the complexes 4a and 6a (IC50=0.31 microM of 4a and IC50=0.30 microM of 6a versus metronidazole).
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Affiliation(s)
- Shailendra Singh
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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Crystal Structure of 2-thiophene-2-yl-3(thiophene-2-carboxylideneamino)-1, 2-dihydroquinazolin-4(3H)-one and the Synthesis, Spectral and Thermal Studies of its Transition Metal(II) Complexes. TRANSIT METAL CHEM 2006. [DOI: 10.1007/s11243-006-0007-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Singh S, Bharti N, Naqvi F, Azam A. Synthesis, characterization and in vitro Antiamoebic Activity of 5-nitrothiophene-2-carboxaldehyde thiosemicarbazones and their Palladium (II) and Ruthenium (II) Complexes. Eur J Med Chem 2004; 39:459-65. [PMID: 15110972 DOI: 10.1016/j.ejmech.2004.02.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2003] [Revised: 01/06/2004] [Accepted: 02/05/2004] [Indexed: 11/28/2022]
Abstract
Synthesis of new Palladium(II) and Ruthenium(II) complexes of the type, [Pd(L)Cl(2)] and [Ru(eta(4)-C(8)H(12))(L)Cl(2)] [where, L = thiosemicarbazones derived from 5-nitrothiophene-2-carboxaldehyde and cycloalkylaminothiocarbonyl hydrazines] have been isolated by the reaction of [Pd(DMSO)(2)Cl(2)] and [Ru(eta(4)-C(8)H(12))(CH(3)CN)(2)Cl(2)] with 5-nitrothiophene-2-carboxaldehyde thiosemicarbazones. The spectral data revealed that the thiosemicarbazones act as bidentate ligands, making use of thionic sulphur and the azomethine nitrogen atom for coordination to the central metal ion. Microdilution method was used for the assessment of antiamoebic activity of all the compounds against HK-9 strain of Entamoeba histolytica. Among all the thiosemicarbazones, 5-NT-4-BPTSCN (3) showed significant antiamoebic activity (IC(50) - 2.56 microM). Enhancement of antiamoebic activity resulted by introducing palladium and ruthenium metals in the thiosemicarbazone moiety. All the Pd(II) and Ru(II) complexes of 5-nitrothiophene-2-carboxaldehyde thiosemicarbazones were found more active then their respective ligands. The complexes 1a-4a, 1b and 3b showed antiamoebic activity.
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Affiliation(s)
- Shailendra Singh
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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