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Relevant bibliographies by topics / Characterization of piperazino

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Academic literature on the topic 'Characterization of piperazino'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Characterization of piperazino"

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N., Kalarani, Angumeenal AR., Kamalakannan P., and Venkappayya D. "Synthesis and characterization of piperazino-bis(methylantipyrine) and its complexes with chromium(III), manganese(II), cobalt(II), copper(II), zinc(II) and cadmium(II) ions." Journal of Indian Chemical Society Vol. 82, May 2005 (2005): 404–10. https://doi.org/10.5281/zenodo.5829979.

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Department of Chemistry, National Institute or Technology, Tiruchirappalli-620 015, India School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur-613 402. India <em>E-mail</em> : angum@nitt.edu <em>Manuscript received 3 September 2003, revised 23 June 2004, accepted 2 February 2005</em> A new Mannich base, piperazino-his(methylantipyrine) (PBMA), was synthesized and characterized by spectral studies. Chelates of PBMA with chromium(III), manganese(ll), cobalt(II), copper(II), zinc(II) and cadmium(II) ions were prepared and characterized by elemental analyses and IR, UV and <su

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2

Skov, Joan, Torsten Bryld, Dorthe Lindegaard, et al. "Synthesis and structural characterization of piperazino-modified DNA that favours hybridization towards DNA over RNA." Nucleic Acids Research 39, no. 5 (2010): 1953–65. http://dx.doi.org/10.1093/nar/gkq1123.

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Little, Vanessa Renee, and Keith Vaughan. "Synthesis and characterization of several series of 4-acyl-1-[2-aryl-1-diazenyl]piperazines." Canadian Journal of Chemistry 92, no. 9 (2014): 838–48. http://dx.doi.org/10.1139/cjc-2014-0242.

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Five series of a novel class of 4-acyl-1-[2-aryl-1-diazenyl]piperazines have been synthesized and characterized: the 4-acetyl-1-[2-aryl-1-diazenyl]piperazines [series 1]; the 4-cyclohexylcarbonyl-1-[2-aryl-1-diazenyl]piperazines [series 2]; the 4-benzoyl-1-[2-aryl-1-diazenyl]piperazines [series 3]; the benzyl 4-[2-aryl-1-diazenyl]-1-piperazinecarboxylates [series 4]; and the t-butyl 4-[2-aryl-1-diazenyl]-1-piperazinecarboxylates [series 5]. The compounds were synthesized by diazotization of a primary aromatic amine and subsequent coupling to an appropriate secondary amine: 1-acetylpiperazine [

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O’Malley, Karen, and Keith Vaughan. "Synthesis and Characterization of a Series of 1-Aryl-4-[Aryldiazenyl]-piperazines. Part II1. 1-Aryl-4-(2-Aryl-1-Diazenyl)-piperazines with Fluoro-, chloro-, Methyl-, Cyano- and Acetyl Substituents in The 1-Aryl Group." Open Chemistry Journal 3, no. 1 (2016): 42–55. http://dx.doi.org/10.2174/1874842201603010042.

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This paper reports the synthesis and characterization of eight series of 1-aryl-4-(2-aryl-1-diazenyl)-piperazines (12 to 19). Several series of these triazenes have been synthesized by the diazotization of a primary arylamine followed by diazonium coupling with a secondary arylpiperazine . The arylpiperazines used in this study are: 1-phenylpiperazine, 1-(4-fluorophenyl-)piperazine, 1-(4-chlorophenyl-)piperazine, 1-(3,4-dichlorophenyl-)piperazine, 1-(2-methylphenyl-)-piperazine, 1-(4-acetophenyl-)-piperazine, 1-(2-pyridyl-)piperazine and 2-cyanophenylpiperazine. These new triazenes (series 12-

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Little, Vanessa Renée, Reid Tingley, and Keith Vaughan. "Triazene derivatives of (1,x)-diazacycloalkanes. Part III. Synthesis and characterization of a series of 1,4-di[2-aryl-1-diazenyl]piperazines." Canadian Journal of Chemistry 83, no. 5 (2005): 471–76. http://dx.doi.org/10.1139/v05-064.

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Reaction of a series of diazonium salts with piperazine in a 2:1 molar ratio affords excellent yields of the 1,4-di-[2-aryl-1-diazenyl]piperazines (3), which have been characterized by IR and NMR spectroscopy. Structural characterization is supported by elemental analysis or by mass spectrometry with accurate mass measurement of the molecular ion. The protons of the piperazine ring hydrogens give rise to a sharp singlet at ca. 4 ppm in the NMR spectra, indicating that the conformational equilibrium in the piperazine ring is rapid on the NMR timescale. The four equivalent carbon atoms of the pi

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Zhang, Gang, and Courtney C. Aldrich. "Macozinone: revised synthesis and crystal structure of a promising new drug for treating drug-sensitive and drug-resistant tuberculosis." Acta Crystallographica Section C Structural Chemistry 75, no. 8 (2019): 1031–35. http://dx.doi.org/10.1107/s2053229619009185.

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Mycobacterium tuberculosis (Mtb), the principal etiological agent of tuberculosis (TB), infects over one-quarter of humanity and is now the leading cause of infectious disease mortality by a single pathogen. Macozinone {2-[4-(cyclohexylmethyl)piperazin-1-yl]-8-nitro-6-(trifluoromethyl)-4H-1,3-benzothiazin-4-one, C20H23F3N4O3S} is a promising new drug for treating drug-sensitive and drug-resistant TB that has successfully completed phase I clinical trials. We report the complete spectroscopic and structural characterization by 1H NMR, 13C NMR, HRMS, IR, and X-ray crystallography. The cyclohexyl

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Hussien, Nasry Jassim, Jasim M. S. Alshawi, Khalid Tuama Abdullah, Enaam I. Yousif, and Mohamad J. Al-Jeboori. "Dimethyltin (IV) complexes of new thiosemicarbazone ligand with piperazine-1-yimethylene moiety: Synthesis, spectral characterization and antibacterial activity." Edelweiss Applied Science and Technology 9, no. 3 (2025): 266–78. https://doi.org/10.55214/25768484.v9i3.5202.

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Three new thiosemicarbazone ligands and their dimethyltin (IV) complexes are reported. The condensation of piperazine-1-carbaldehyde with thiosemicarbazide, 4-methyl-3-thiosemicarbazide, and 4-ethyl-3-thiosemicarbazide was carried out in an ethanol medium using HBr as a catalyst, resulting in the isolation of the ligands (E)-2-(piperazin-1-ylmethylene) hydrazine-1-carbothioamide (HL1), (E)-N-methyl-2-(piperazin-1-ylmethylene) hydrazine-1-carbothioamide (HL2), and (E)-N-ethyl-2-(piperazin-1-ylmethylene) hydrazine-1-carbothioamide (HL3), respectively. The reaction of ligands HL1 - HL3 with dimet

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Hulinská, Hana, Zdeněk Polívka, Jiří Jílek, et al. "Experimental antiulcer agents: N-substituted 2-(4-methyl-1-piperazinyl)acetamides as pirenzepine models and some related compounds." Collection of Czechoslovak Chemical Communications 53, no. 8 (1988): 1820–44. http://dx.doi.org/10.1135/cccc19881820.

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Reactions of N-cyclohexyl-2-chloroacetamide, N-phenyl-2-chloroacetamide, N-(4-dimethylaminophenyl)-2-chloroacetamide, N-(2-nitrophenyl)-N-phenyl-2-chloroacetamide, its 3-nitrophenyl and 4-nitrophenyl analogues, N-(2-benzylphenyl)-2-chloroacetamide, 5-(chloroacetyl)-dibenz[b,f]azepine, and its 10,11-dihydro derivative with piperazine, 1-methylpiperazine, 2-(1-piperazinyl)ethanol, and 3-(1-piperazinyl)propanol resulted in compounds II, III, V-XV, XVIII, XXI, and XXIII, simple analogues of the antiulcer agent pirenzepine (I). Contributions to the syntheses and characterization of mianserin (XIX),

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Raad, Saad Jihad, Abed Abdul-Reda Nabeel та Mousa Juda Al-Shamari Amer. "Synthesis, characterization and molecular docking of new deriva-tives that contain quіnoxazlіne moities and study antioxidant prop-erties". Pakistan Journal of Analytical & Environmental Chemistry 23, Special Issue (2023): 174–88. https://doi.org/10.5281/zenodo.7702678.

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<strong>   Abstract </strong>     In this study we are prepared some novel derivatives from cetirizine Impurity A by react 1-((4-chlorophenyl)(phenyl) methyl)piperazine with 2-chloro acetyl chloride to prepared 2-chloro-1-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethan-1-one (1) from this directive prepared the derivatives (2-6) when react with o-phenylenediamine derivatives to obtain analytically pure quinoxaline derivatives .The reaction was monitored by thin‐layer chromatography (TLC) technique. All new compounds were characterized by melting points, element

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Little, Vanessa Renée, and Keith Vaughan. "Synthesis and characterization of a series of 1-methyl-4-[2-aryl-1-diazenyl]piperazines and a series of ethyl 4-[2-aryl-1-diazenyl]-1-piperazinecarboxylates." Canadian Journal of Chemistry 82, no. 8 (2004): 1294–303. http://dx.doi.org/10.1139/v04-081.

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1-Methylpiperazine was coupled with a series of diazonium salts to afford the 1-methyl-4-[2-aryl-1-diazenyl]piperazines (2), a new series of triazenes, which have been characterized by 1H and 13C NMR spectroscopy, IR spectroscopy, and elemental analysis. Assignment of the chemical shifts to specific protons and carbons in the piperazine ring was facilitated by comparison with the chemical shifts in the model compounds piperazine and 1-methylpiperazine and by a HETCOR experiment with the p-tolyl derivative (2i). A DEPT experiment with 1-methylpiperazine (6) was necessary to distinguish the meth

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Dissertations / Theses on the topic "Characterization of piperazino"

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"Synthesis and structural characterization of some N,N'-diaryl- and N,N'-dicyclohexyl-piperazine N,N'-dioxide hydrates." Chinese University of Hong Kong, 1987. http://library.cuhk.edu.hk/record=b5885786.

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IELO, LAURA. "IDENTIFICATION OF NEW TYROSINASE INHIBITORS VIA COMPUTATIONAL STUDIES, SYNTHESIS AND STRUCTURAL CHARACTERIZATION." Doctoral thesis, 2018. http://hdl.handle.net/11570/3130819.

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Tys (EC 1.14.18.1) are metalloenzymes, existing in all life domains, involved in the mammal biosynthesis of melanin. An excessive production of melanin can cause serious skin diseases. Thus, Tys inhibition is an established strategy to avoid these side effects and the development of TyIs gained high interest in the therapy of skin pathologies, as well as, in dermocosmetic treatments. Over the past 30 years several TyIs such as hydroquinone and kojic acid were developed, but unfortunately they showed relevant human toxicity. For this reason, there is still an urgent needing for new derivatives

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3

Hu, Ting Chia, and 胡庭嘉. "Metal Complexes (M = Al、Zn、Zr) Containing Bi- and Tridentate Pyrrole-Piperazine Ligands. Synthesis, Characterization, Structual Elucidation, Reactivity Study and Ring Opening Polymerization." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/27262530532265092670.

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碩士<br>國立彰化師範大學<br>化學系<br>102<br>A serious of aluminum, zinc, zirconium complexes containing bidentate and tridentate pyrrole ligand [C4H3NH[2-CH2N(CH2CH2)2NPh]] (L1) and [C4H2NH{2,5-[CH2N(CH2CH2)2NPh]2}] (L2), were synthesized and characterized. Treatments of one and two equivs of L1 with AlMe3 in toluene yield [AlMe2{C4H3N[2-CH2N(CH2CH2)2NPh]}] (1) and [AlMe{C4H3N[2-CH2N(CH2CH2)2NPh]}2[NH(CH2CH2)2NPh]] (2’), respectively. Similarly while reacting L1 with one equiv of ZnMe2 and 0.5 equiv of Zr(NMe2)4 generate a dimeric [{ZnMe{C4H3N[2-CH2N(CH2CH2)2NPh]}}2] (3) and [Zr{C4H3N[2-CH2N(CH2CH2)2NPh]}

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Conference papers on the topic "Characterization of piperazino"

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Stojković, Danijela, Maja Đukić, Marija Ristić, et al. "Synthesis, characterization and HSA interactions of a new piano-stool ruthenium(II) complex containing a thioamide-type ligand." In 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.507s.

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The synthesis and characterization of a newly synthesized piano-stool [Ru-(ɳ6-p-cymene)Cl2L] complex with a ligand 3-amino-2-cyano-N-phenyl-3-(4-phenyl-1-piperazinyl)-2-propenethioamide are presented. The complex was obtained in good yield as an ochre powderand was characterized by elemental analysis, 1H and 13C NMR, IR, conductometry, and melting point. The fluorescence binding studies showed that the interaction of the complex with albumin occurs by a static quenching mechanism and that the complex showed a very high value of the binding constant with one binding site (Kb = 1.68 × 107; n = 1

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