1
|
Das A, Ajarul S, Debnath S, Hota P, Maiti DK. Bro̷nsted Acid-Catalyzed [5+1] and [4+1] Annulation of Cyclic Anhydrides with o-Alkynylanilines to Construct Fused-N-Heterocycles. J Org Chem 2023; 88:15073-15084. [PMID: 37876131 DOI: 10.1021/acs.joc.3c01525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
An unprecedented p-TsOH and MsOH-catalyzed construction of valuable isoindolo/pyrido/pyrrolo-quinolinediones and isoindolo-indolones is demonstrated through annulation reactions of cyclic anhydrides or o-formylbenzoates with o-alkynylanilines. The metal-free Bro̷nsted acid-mediated new [5+1] and [4+1] fused-cyclization is an operationally simple, highly regioselective, atom economical, high yielding, sustainable, and catalytically efficient approach.
Collapse
Affiliation(s)
- Aranya Das
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Sk Ajarul
- Government General Degree College at Salboni, Bhimpur, Paschim Medinipur 721516, India
| | - Sudipto Debnath
- Central Ayurveda Research Institute, CCRAS, Ministry of Ayush, Govt. of India, 4-CN Block, Bidhannagar, Sector-V, Kolkata 700091, India
| | - Poulami Hota
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Dilip K Maiti
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| |
Collapse
|
2
|
Janse van Rensburg HD, Suganuma K, N'Da DD. In vitro trypanocidal activities and structure-activity relationships of ciprofloxacin analogs. Mol Divers 2023:10.1007/s11030-023-10704-9. [PMID: 37481633 DOI: 10.1007/s11030-023-10704-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/16/2023] [Indexed: 07/24/2023]
Abstract
Tropical diseases, such as African trypanosomiasis, by their nature and prevalence lack the necessary urgency regarding drug development, despite the increasing need for novel, structurally diverse antitrypanosomal drugs, using different mechanisms of action that would improve drug efficacy and safety. Traditionally antibacterial agents, the fluoroquinolones, reportedly possess in vitro trypanocidal activities against Trypanosoma brucei organisms. During our research, the fluroquinolone, ciprofloxacin (1), and its analogs (2-24) were tested against bloodstream forms of T. brucei brucei, T. b. gambiense, T. b. rhodesiense, T. evansi, T. equiperdum, and T. congolense and Madin-Darby bovine kidney cells (cytotoxicity). Ciprofloxacin [CPX (1)] demonstrated selective trypanocidal activity against T. congolense (IC50 7.79 µM; SI 39.6), whereas the CPX derivatives (2-10) showed weak selective activity (25 < IC50 < 65 µM; 2 < SI < 4). Selectivity and activity of the CPX and 1,2,3-triazole (TZ) hybrids (11-24) were governed by their chemical functionality at C-3 (carboxylic acid, or 4-methylpiperazinyl amide) and their electronic effect (electron-donating or electron-withdrawing para-benzyl substituent), respectively. Trypanocidal hits in the micromolar range were identified against bloodstream forms of T. congolense [CPX (1); CPX amide derivatives 18: IC50 8.95 µM; SI 16.84; 22: IC50 5.42 µM; SI 25.2] and against T. brucei rhodesiense (CPX acid derivative 13: IC50 4.51 µM; SI 10.2), demonstrating more selectivity toward trypanosomes than mammalian cells. Hence, the trypanocidal hit compound 22 may be optimized by retaining the 4-methylpiperazine amide functional group (C-3) and the TZ moiety at position N-15 and introducing other electron-withdrawing ortho-, meta-, and/or para-substituents on the aryl ring in an effort to improve the pharmacokinetic properties and increase the trypanocidal activity. Structure-activity relationships of ciprofloxacin-1,2,3-triazole hybrids were governed by the chemical functionality at C-3 and electronic effect.
Collapse
Affiliation(s)
| | - Keisuke Suganuma
- National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Inada, Obihiro, Hokkaido, 080-8555, Japan.
| | - David D N'Da
- Centre of Excellence for Pharmaceutical Sciences, North-West University, Potchefstroom, 2520, South Africa
| |
Collapse
|
3
|
Volchkov NV, Lipkind MB, Nefedov OM. Synthesis of fluorinated halonitrobenzenes and halonitrophenols using tetrafluoroethylene and buta-1,3-dienes as starting building blocks. Russ Chem Bull 2022. [DOI: 10.1007/s11172-021-3327-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Prabha K, Satheeshkumar R, Prasad KJR. Synthesis and Cytotoxicity of Novel Indoloquinolines and Benzonaphthyridines from 4‐Chloro‐2,8‐dimethylquinoline and Variety of Hetero Amines. ChemistrySelect 2021. [DOI: 10.1002/slct.202101269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Kolandaivel Prabha
- Department of Chemistry K. S. Rangasamy College of Technology Tiruchengode 637215 India
- Department of Chemistry Bharathiar University Coimbatore 641046 India
| | - Rajendran Satheeshkumar
- Department of Chemistry Bharathiar University Coimbatore 641046 India
- Departamento de Química Orgánica Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile 702843 Santiago de Chile Chile
| | | |
Collapse
|
5
|
Kumar A, Saxena N, Mehrotra A, Srivastava N. Review: Studies on the Synthesis of Quinolone Derivatives with Their Antibacterial Activity (Part 1). CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200427082108] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Quinolone derivatives have attracted considerable attention due to their medicinal
properties. This review covers many synthetic routes of quinolones preparation with
their antibacterial properties. Detailed study with structure-activity relationship among
quinolone derivatives will be helpful in designing new drugs in this field.
Collapse
Affiliation(s)
- Anil Kumar
- Shri Siddhi Vinayak Institute of Technology, Nainital Road, Bareilly, Uttar Pradesh 241122, India
| | - Nishtha Saxena
- Bioorganic and Heterocyclic Research Laboratory, Department of Chemistry, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly, 243006 (U.P.), India
| | - Arti Mehrotra
- IMS University Course Camps, School of Bioscience, Ghaziabad, Uttar Pradesh 201015, India
| | - Nivedita Srivastava
- Bioorganic and Heterocyclic Research Laboratory, Department of Chemistry, Faculty of Engineering and Technology, M.J.P. Rohilkhand University, Bareilly, 243006 (U.P.), India
| |
Collapse
|
6
|
A heterodinuclear complex of s-d block containing sodium(I), manganese(II) and the enrofloxacinate anion: Preparation, crystal structure and antibacterial activity. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.03.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
7
|
Designing a Single-Molecule Biophysics Tool for Characterising DNA Damage for Techniques that Kill Infectious Pathogens Through DNA Damage Effects. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 915:115-27. [PMID: 27193541 DOI: 10.1007/978-3-319-32189-9_9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Antibiotics such as the quinolones and fluoroquinolones kill bacterial pathogens ultimately through DNA damage. They target the essential type IIA topoisomerases in bacteria by stabilising the normally transient double-strand break state which is created to modify the supercoiling state of the DNA. Here we discuss the development of these antibiotics and their method of action. Existing methods for DNA damage visualisation, such as the comet assay and immunofluorescence imaging can often only be analysed qualitatively and this analysis is subjective. We describe a putative single-molecule fluorescence technique for quantifying DNA damage via the total fluorescence intensity of a DNA origami tile fully saturated with an intercalating dye, along with the optical requirements for how to implement these into a light microscopy imaging system capable of single-molecule millisecond timescale imaging. This system promises significant improvements in reproducibility of the quantification of DNA damage over traditional techniques.
Collapse
|
8
|
Khong S, Kwon O. Phosphine-Initiated General-Base-Catalyzed Quinolone Synthesis. ASIAN J ORG CHEM 2014; 3:453-457. [PMID: 26207200 PMCID: PMC4509642 DOI: 10.1002/ajoc.201402039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Indexed: 11/06/2022]
Abstract
Phosphinocatalysis provides a new approach toward 3-substituted-4-quinolones. A simple procedure, which uses Ph3P as an inexpensive catalyst and S-phenyl 2-(N-tosylamido)benzothioates and activated alkynes as starting materials, provides direct access to several 3-aroyl-4-quinolones and methyl 4-quinolone-3-carboxylate esters. The reaction presumably occurs through general base catalysis, with the initial addition of Ph3P to the activated alkyne generating the phosphonium enoate zwitterion, which acts as the strong base that initiates the reaction.
Collapse
Affiliation(s)
- San Khong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095-1569 (USA), Fax: (+1)310-206-3722
| | - Ohyun Kwon
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Dr. East, Los Angeles, California 90095-1569 (USA), Fax: (+1)310-206-3722
| |
Collapse
|
9
|
Wang X, Yan SW, Yang J, Xiao DR, Zhang HY, Zhang JL, Chi XL, Wang EB. Three interdigitated metal–quinolone complexes from self-assembly of mixed ligands and cadmium salts. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2013.09.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
10
|
Fernandes P, Sousa I, Cunha-Silva L, Ferreira M, de Castro B, Pereira EF, Feio MJ, Gameiro P. Synthesis, characterization and antibacterial studies of a copper(II) lomefloxacin ternary complex. J Inorg Biochem 2013; 131:21-9. [PMID: 24239909 DOI: 10.1016/j.jinorgbio.2013.10.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Revised: 10/17/2013] [Accepted: 10/19/2013] [Indexed: 10/26/2022]
Abstract
Solution behavior of lomefloxacin (lmx) complexes with copper(II) in the presence and absence of 1,10-phenanthroline (phen) was studied in aqueous solution, by potentiometry. The results obtained showed that under physiological conditions (micromolar concentration range and pH7.4) only copper(II):lmx:phen ternary complexes are stable. Hence, a novel copper(II) ternary complex of lomefloxacin with the nitrogen donor heterocyclic ligand phen was synthesized and characterized by means of UV-visible and IR spectroscopy, elemental analysis and X-ray crystallography. In the synthesized complex (1), [Cu(lmx)(phen)(NO3)]·5H2O, lmx acts as a bidentate ligand coordinating the metal cation, in its anionic form, through the carbonyl and carboxyl oxygens and phen coordinates through two N-atoms forming the equatorial plane of a distorted square-pyramidal geometry. The fifth ligand of the penta-coordinated Cu(II) center is occupied axially by an oxygen atom from the nitrate ion. Minimum inhibitory concentration (MIC) determinations of the complex and comparison with free lomefloxacin in various E. coli strains indicated that the Cu-complex is an antimicrobial which is as efficient as the free antibiotic but strongly suggest that the cell intake route of both species is different. Moreover, spectrophotometric stability studies suggest that the solution of the complex synthesized is considerably more photostable than the free fluoroquinolone supporting, therefore, the complex's suitability as a candidate for further biological testing in fluoroquinolone-resistant microorganisms with possible reduced side-effects.
Collapse
Affiliation(s)
- Patrícia Fernandes
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Isabel Sousa
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Luís Cunha-Silva
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Mariana Ferreira
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Baltazar de Castro
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Eulália F Pereira
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Maria J Feio
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal.
| | - Paula Gameiro
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| |
Collapse
|
11
|
Sadeek SA, Zordok WA, El-Shwiniy WH. Synthesis, Characterization, DFT Modeling and Antimicrobial Studies on the Ti(IV), Y(III) and Ce(IV) Ofloxacin Solid Complexes. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2013. [DOI: 10.5012/jkcs.2013.57.5.574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
12
|
On the photophysicochemical properties of selected fluoroquinolones: solvatochromic and fluorescence spectroscopy study. J Fluoresc 2012; 23:93-101. [PMID: 22993120 DOI: 10.1007/s10895-012-1120-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 08/03/2012] [Indexed: 10/27/2022]
Abstract
The photophysicochemical properties of selected fluoroquinolones in different solvents of various physical properties, including polarity and hydrogen bonding ability, were investigated using steady state fluorescence spectroscopy. The solvent-dependant fluorescence emission spectra of selected fluoroquinolones, namely ciprofloxacin (CIPR) and enrofloxacin (ENRO), were employed to gain insights concerning its photophysicochemical properties of interests. Interestingly, fluorescence spectra of the selected drugs exhibited structured emission spectra in nonpolar solvents such as hexane, whereas unstructured spectra were observed in more polar solvents such as alcohols and water. Also, a notable bathochromic shift in λ(max)(em) was observed in fluorescence spectra of both drugs with increasing solvent polarity that resulted in biphasic behavior upon applying the Lippert-Mataga correlation that correspond to general and specific solvent effects. Applying the Lippert-Mataga correlation to the fluorescence spectra of CIPR and ENRO in various solvents was employed to estimate the dipole moment difference between the ground and excited states of them, Δμ(μ(e) - μ(g)), where obtained results revealed the values of 9.4 and 16.2 Debye for the LE and ICT states of ENRO, respectively, and 8.0 and 16.2 Debye for the LE and ICT states of CIPR, respectively. Multiple linear regression analysis (MLRA) based on Kamlet-Taft equating was applied against absorption frequency (ν(abs)), emission frequency (ν(em)), Stokes shift (∆ν), and fluorescence quantum yield (Φ(f)), where obtained results revealed excellent correlation (R: 0.916-0.966) that are consistent with other results considering the effect of solvent polarizability, hydrogen bonding ability, and viscosity on the photophysicochemical properties of the studied fluoroquinolones.
Collapse
|
13
|
Synthesis and in vitro antibacterial activities of 7-(3-aminopyrrolo[3,4-c]pyrazol-5(2H,4H,6H)-yl)quinolone derivatives. CHINESE CHEM LETT 2010. [DOI: 10.1016/j.cclet.2010.06.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
14
|
|
15
|
Mitscher LA. Bacterial topoisomerase inhibitors: quinolone and pyridone antibacterial agents. Chem Rev 2005; 105:559-92. [PMID: 15700957 DOI: 10.1021/cr030101q] [Citation(s) in RCA: 591] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lester A Mitscher
- Department of Medicinal Chemistry and Molecular Biosciences and The Chemical Methodologies and Library Development Center of Excellence, The University of Kansas, Lawrence, Kansas 66045-7582, USA.
| |
Collapse
|
16
|
El Bialy SAA, Abdelal AM, El-Shorbagi AN, Kheira SMM. 2, 3-Bis(5-alkyl-2-thiono-1, 3, 5-thiadiazin-3-yl) Propionic Acid: One-PotDomino Synthesis and Antimicrobial Activity. Arch Pharm (Weinheim) 2005; 338:38-43. [PMID: 15674803 DOI: 10.1002/ardp.200400906] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In a search for promising antibacterial and antifungal compounds, two new series of 2, 3-bis(5-alkyl-2-thiono-1, 3, 5-thiadiazin-3-yl)propionic acid 1 and their corresponding N, N-dimethylpropionamide 6 have been synthesized. The reaction of 2, 3-diaminopropionate 3, carbon disulfide, formaldehyde, and the appropriate alkyl amines furnished the title compound 1. N, N-dimethylpropionamides 6 were obtained by the reaction of 1 with dimethyl amine in the presence of POCl(3). The newly prepared compounds were screened in vitro against certain strains of Gram-positive and Gram-negative bacteria and compared with nalidixic acid and ciprofloxacin. Moreover, the title compounds were tested for their antifungal activity in vitro against Candida albicans, phytopathogenic, Penicillum expansum and Trichoderma hazianum, and aflatoxin-producing Aspergillus flavus. These compounds exhibit varied activity against the tested pathogenic bacteria and remarkable inhibitory effects on growth or sporulation of some of the tested fungal species.
Collapse
Affiliation(s)
- Serry A A El Bialy
- Department of Pharmaceutical Organic Chemistry, University of Mansoura, Mansoura, Egypt
| | | | | | | |
Collapse
|
17
|
Budai M, Szabó Z, Zimmer A, Szögyi M, Gróf P. Studies on molecular interactions between nalidixic acid and liposomes. Int J Pharm 2004; 279:67-79. [PMID: 15234796 DOI: 10.1016/j.ijpharm.2004.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2003] [Revised: 03/24/2004] [Accepted: 04/04/2004] [Indexed: 11/26/2022]
Abstract
The interaction between nalidixic acid sodium salt (NANa) and liposomes prepared from alpha-L-dipalmitoyl-phosphatidylcholine (DPPC) or from its binary mixture with dioleoyl-phosphatidylcholine (DOPC) was studied with differential scanning calorimetry (DSC) and electron paramagnetic resonance (EPR) spectroscopy. We evaluated the role of broadband ultraviolet-B (UV-B) irradiation on the molecular interactions between the lipids and the NANa, and determined the decay-kinetics of the incorporated spin labeled fatty-acid free radicals. Multilamellar and unilamellar vesicles were prepared by sonication and extrusion. The entrapment efficiencies were determined spectrophotometrically. The size-distribution of the liposomes and its change in time was checked by dynamic light scattering (DLS). Our results indicate that NANa mainly interacts with lipid head groups. However, its effect and presumably the formation of the free radicals, induced by broadband ultraviolet-B, is not localized only to the head group region of the lipid molecules. Depending on DOPC content, interaction between the NANa and the lipids modifies the phase-transition parameters of the liposome dispersions.
Collapse
Affiliation(s)
- M Budai
- Institute of Biophysics and Radiation Biology, Faculty of Medicine, Semmelweis University, Budapest VIII, P.O. Box 263, Puskin u. 9, H-1444 Budapest, Hungary
| | | | | | | | | |
Collapse
|
18
|
|
19
|
Michael JP, de Koning CB, Hosken GD, Stanbury TV. Reformatsky reactions with N-arylpyrrolidine-2-thiones: synthesis of tricyclic analogues of quinolone antibacterial agents. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00964-4] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
20
|
Petersen U. [The evolution of quinolone: from nalidixic acid to the quinolones of the third generation]. PHARMAZIE IN UNSERER ZEIT 2001; 30:376-81. [PMID: 11575173 DOI: 10.1002/1615-1003(200109)30:5<376::aid-pauz376>3.0.co;2-o] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
21
|
|
22
|
Antitumor activity of the fluorinated derivatives of condensed quinolines and quinazolines. Pharm Chem J 2000. [DOI: 10.1007/bf02524552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
23
|
Richardson TO, Shanbhag VP, Adair K, Smith S. Synthesis of 7-benzoxazol-2-yl and 7-benzothiazol-2-yl-6-fluoroquinolones. J Heterocycl Chem 1998. [DOI: 10.1002/jhet.5570350610] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
24
|
Shem-Tov M, Ziv G, Glickman A, Saran A. Pharmacokinetics and penetration of marbofloxacin from blood into the milk of cows and ewes. ZENTRALBLATT FUR VETERINARMEDIZIN. REIHE A 1997; 44:511-9. [PMID: 9465771 DOI: 10.1111/j.1439-0442.1997.tb01137.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The single-dose disposition kinetics of marbofloxacin were determined in lactating cows and ewes after intravenous (i.v.) and intramuscular (i.m.) administration of 2, 2.5 and 4 mg/kg. Drug concentrations in blood and milk were determined by microbiological assay and the data were subjected to compartmental and non-compartmental kinetic analyses. In cows, the i.v. serum elimination half-life (t1/2 beta) was approximately 2 h and the i.m. serum elimination half-life (t1/2el) was approximately 3 h. The mean steady-state volume of distribution (Vss) was 1.5 l/kg for the cows and 0.6 l/kg for the ewes. The i.m. availability was nearly 100% for both cows and ewes. Drug penetration into the milk was rapid and extensive with milk marbofloxacin concentrations exceeding those in serum 2 h after administration. Milk drug concentrations equal to or greater than the minimal inhibitory concentrations for the majority of gram-negative udder pathogens were maintained for approximately 12 h after i.v. and i.m. treatment of 2-4 mg/kg. The drug was not detected in milk 24 h after treatment (sensitivity limit of assay = 0.05 microgram/ml).
Collapse
Affiliation(s)
- M Shem-Tov
- Ministry of Agriculture, Kimron Veterinary Institute, Bet Dagan, Israel
| | | | | | | |
Collapse
|
25
|
|
26
|
Hong CY, Kim SH, Kim YK. Novel 5-amino-6-methylquinolone antibacterials: A new class of non-6-fluoroquinolones. Bioorg Med Chem Lett 1997. [DOI: 10.1016/s0960-894x(97)00324-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
27
|
Sui Z, Nguyen VN, Fernandez J, Barrett JF, Ohemeng KA. Synthesis of 2-substituted 4-quinazolone-5-carboxylic acids as inhibitors of DNA-gyrase. J Heterocycl Chem 1997. [DOI: 10.1002/jhet.5570340124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
28
|
Burhenne J, Ludwig M, Nikoloudis P, Spiteller M. Primary photoproducts and half-lives. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 1997; 4:10-15. [PMID: 19002411 DOI: 10.1007/bf02986257] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/1997] [Indexed: 05/27/2023]
Abstract
The photolytically induced decomposition of fluoroquinolone carboxylic acids (enrofloxacin, danofloxacin, ciprofloxacin and norfloxacin) at concentrations of 10 mg/l in pure water and an irradiation intensity of 200 W/m(2) (xenon lamp) led to half-lives from 20.6 min (danofloxacin) to 105.9 min (norfloxacin). The environmental half-life of enrofloxacin was calculated by the GCSOLAR program and resulted in 1.8 to 55.4 hours, depending on the season and degree of latitude. During the irradiation procedure, products were built up which primarily demonstrated alterations involving the piperazine ring as compared with the parent compounds. The amount of(14)CO(2) evolved by the photomineralization of(14)C-labeled enrofloxacin reached 26.4 % of the applied radioactivity. The main photoproducts were isolated by HPLC and their structural elucidation was carried out by different spectroscopic methods (MS, GC/MS and(1)H-NMR).
Collapse
Affiliation(s)
- J Burhenne
- Department of Ecological Chemistry and Ecotoxicology, University of Kassel, Nordbahnhofstrasse 1a, D-37213, Witzenhausen, Germany
| | | | | | | |
Collapse
|
29
|
Burhenne J, Ludwig M, Spiteller M. Isolation and structural elucidation of polar photometabolites. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 1997; 4:61-7. [PMID: 19005784 DOI: 10.1007/bf02986278] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/1996] [Accepted: 01/02/1997] [Indexed: 05/27/2023]
Abstract
Subsequent to irradiation with a xenon lamp simulating sunlight, fluoroquinolone carboxylic acids in aqueous solution form polar pyridone dicarboxylic and tricarboxylic acids. After liquid/liquid partition with chloroform/water these substances can be isolated by ion exchange chromatography of the aqueous phase. They can be regarded as intermediate compounds on the route to a complete photomineralization. The structural elucidation is performed by such mass spectroscopic methods as MS, GC/MS and HPLC/MS, whereby HPLC/MS shows the highest reliability. Additionally(1)H- and(13)C-NMR measurements confirm the structure of the main polar degradation product.
Collapse
Affiliation(s)
- J Burhenne
- Department of Ecological Chemistry and Ecotoxicology, University of Kassel, Nordbahnhofstrasse la, D-37213, Witzenhausen, Germany
| | | | | |
Collapse
|
30
|
Michael JP, de Koning CB, Stanbury TV. A versatile synthesis of tricyclic analogues of quinolone antibacterial agents: Use of a novel reformatsky reaction. Tetrahedron Lett 1996. [DOI: 10.1016/s0040-4039(97)82976-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
31
|
Jürgens J, Schedletzky H, Heisig P, Seydel JK, Wiedemann B, Holzgrabe U. Syntheses and biological activities of new N1-aryl substituted quinolone antibacterials. Arch Pharm (Weinheim) 1996; 329:179-90. [PMID: 8669982 DOI: 10.1002/ardp.19963290403] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A series of quinolones with a systematically varied substitution at the phenyl ring at N1 has been synthesized. Three lipophilicity descriptors (log K, log P, Rm) and the pKa values have been determined as well as the microbiological activity: The MIC values for eight different strains of three Gram-positive and three Gram-negative species and the inhibitory concentrations of DNA supercoiling (IC90 and IC100) were determined. From a principal component and a QSAR analysis relationships between antibacterial activity concerning the whole-cell system and electronic properties as well as the length of the substituents at the phenyl rings could be derived. The activity in a cell-free system was governed by the lipophilicity and the width of the substituents. It is speculated that the quinolones take a defined place in the DNA gyrase-DNA complex which is characterized by polar amino acids. This is in agreement with findings from studies of mutant gyrases.
Collapse
Affiliation(s)
- J Jürgens
- Institute of Pharmacy, University of Bonn, Germany
| | | | | | | | | | | |
Collapse
|
32
|
Klopman G, Fercu D, Li JY, Rosenkranz HS, Jacobs MR. Antimycobacterial quinolones: a comparative analysis of structure-activity and structure-cytotoxicity relationships. Res Microbiol 1996; 147:86-96. [PMID: 8761728 DOI: 10.1016/0923-2508(96)80209-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- G Klopman
- Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106-7078, USA
| | | | | | | | | |
Collapse
|
33
|
Latham EJ, Murphy SM, Stanforth SP. Fused Pyridine Derivatives from the Wittig Reaction of some Fluorinated Amides. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00605-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
34
|
Abstract
A number of lines of evidence suggest that the N-terminal sub-domain of the DNA gyrase B protein contains the binding site for the coumarin antibiotics. We have engineered a clone which encodes a 24 kDa protein which represents this domain. Bacteria which overproduce this protein show an elevated level of resistance to coumarins, suggestive of binding of the 24 kDa protein to the drugs in vivo. In vitro we find that the 24 kDa protein does not interact with the gyrase A or B proteins or with DNA, and fails to hydrolyse ATP or show significant binding to ATP, ADP or ADPNP. However, we show that the 24 kDa protein binds coumarin drugs as tightly as the intact B protein. A number of experiments suggest that the interaction of the coumarins with the protein is predominantly hydrophobic in nature.
Collapse
Affiliation(s)
- E J Gilbert
- Department of Biochemistry, University of Leicester, UK
| | | |
Collapse
|
35
|
Watts JL, Salmon SA, Yancey RJ, Nersessian B, Kounev ZV. Minimum inhibitory concentrations of bacteria isolated from septicemia and airsacculitis in ducks. J Vet Diagn Invest 1993; 5:625-8. [PMID: 8286468 DOI: 10.1177/104063879300500423] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- J L Watts
- Animal Health Discovery Research, Upjohn Company, Kalamazoo, MI 49001
| | | | | | | | | |
Collapse
|
36
|
Petracca K, Riond JL, Graser T, Wanner M. Pharmacokinetics of the gyrase inhibitor marbofloxacin: influence of pregnancy and lactation in sows. ZENTRALBLATT FUR VETERINARMEDIZIN. REIHE A 1993; 40:73-9. [PMID: 8383902 DOI: 10.1111/j.1439-0442.1993.tb00602.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Six pregnant sows were treated in early pregnancy, late pregnancy and during lactation. Marbofloxacin was administered (2 mg/kg body weight) intravenously and orally. The active drug concentration in the plasma was quantitated by use of high performance liquid chromatography (HPLC). Pharmacokinetic parameters were calculated by use of statistical moments. In lactating animals, the concentrations in milk were also determined by HPLC. Mean elimination half-life of the drug after oral administration was significantly shorter in lactating sows (5.74h) than that of the early pregnancy group (10.09h). Total body clearance was highest in the lactating sows (3.27 ml/minute.kg body weight). The volume of distribution was large in all physiological states studied indicating good tissue penetration. Bioavailability was about 80% in pregnant and lactating sows. Antimicrobial secretion in milk contributed greatly to marbofloxacin elimination. These results indicate an important influence of lactation on marbofloxacin pharmacokinetics in sows. Therefore, in such cases, marbofloxacin dose should be increased during lactation.
Collapse
Affiliation(s)
- K Petracca
- Institute of Veterinary Physiology, University of Zürich, Switzerland
| | | | | | | |
Collapse
|