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Dissertations / Theses on the topic '4-oxadiazoly'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Kivrak, Arif. "Development Of New Methods For The Synthesis Of Pyrazoles, 4-iodopyrazoles, Isoxazoles And 1,2,4-oxadiazoles." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612945/index.pdf.

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Synthesis of five-membered heteroaromatic compounds such as pyrazoles, isoxazoles and 1,2,4-oxadiazoles are important for pharmaceutical industry and material science due to their applications. Although there are many methods to prepare such compounds, new variants continue to appear since they exhibit a wide range of biological and medicinal activities. In this thesis, new methods were developed for the synthesis of 4-iodopyrazoles, pyrazoles, isoxazoles, 1,2,4-oxadiazoles and/or 1,2,4-oxadiazepines. In the first part of the study, electrophilic cyclization of &alpha<br>,&beta<br>-alkynic hy

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2

Paulo, TÃrcio de Freitas. "5-(4-PIRIDIL)-1,3,4-(OXADIAZOL)-2-TIOL E Na3[Fe(CN)5Hpyt].3H2O: SÃntese, caracterizaÃÃo e estudos de formaÃÃo de monocamadas automontadas." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1418.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>As espÃcies 5-(4-piridil)-1,3,4-oxadiazol-2-tiol (Hpyt) e [Fe(CN)5Hpyt]3- (FeHpyt) adsorvem espontaneamente sobre ouro formando monocamadas automontadas (SAM - "Self-Assembled Monolayers") das quais, de acordo com os dados eletroquÃmicos, apresentam defeitos ou nanoporos por onde as molÃculas de prova [Fe(CN)6]4â e [Ru(NH3)6]3+ acessam a superfÃcie do eletrodo de ouro policristalino. A partir dessas molÃculas de prova e da dependÃncia entre a corrente faradÃica e o pH do eletrÃlito, o pKa da monocamada de Hpyt foi calculada como

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3

Paulo, Tércio de Freitas. "5-(4-PIRIDIL)-1,3,4-(OXADIAZOL)-2-TIOL E Na3[Fe(CN)5Hpyt].3H2O: Síntese, caracterização e estudos de formação de monocamadas automontadas." reponame:Repositório Institucional da UFC, 2007. http://www.repositorio.ufc.br/handle/riufc/13715.

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PAULO, T. F.; DIÓGENES, I. C. N. 5-(4-PIRIDIL)-1,3,4-(OXADIAZOL)-2-TIOL E Na3[Fe(CN)5Hpyt].3H2O: Síntese, caracterização e estudos de formação de monocamadas automontadas. 2007. 85 f. Dissertação (Mestrado em Química Inorgânica) - Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2007.<br>Submitted by José Jairo Viana de Sousa (jairo@ufc.br) on 2014-10-15T17:50:25Z No. of bitstreams: 1 2007_dis_tfpaulo.pdf: 2052309 bytes, checksum: bfeda1bf390b31ae8ba8c29ee74f6e40 (MD5)<br>Approved for entry into archive by José Jairo Viana de Sousa(jairo@ufc.br) on 2015-10-22T23:18:53Z (GMT) No

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4

Riederer, Cordula. "Zur Synthese von Tetrahydro-oxazolo[4,3-c]-1,2,4-oxadiazol-5-onen und Tetrahydro-oxazolo[4,3-c]-1,2,4-oxadiazin-6-onen aus 4-Hydroxyimino-oxazolidin-2-onen." [S.l. : s.n.], 1999. http://www.sub.uni-hamburg.de/disse/68/riederer.PDF.

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5

Le, Falher Laetitia. "Préparation et dérivatisation de 4H-pyrido[e][1,3]oxazinones : une contribution à la diversité chimique." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066344.

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Ce manuscrit porte sur la synthèse et les applications d'une nouvelle série de composés hétéroaromatiques : les 4H-pyrido[e][1,3]oxazin-4-ones. La première partie de ce manuscrit présente la préparation de ces squelettes via une réaction d'O-arylation intramoléculaire. La seconde partie du manuscrit repose sur la réactivité de ces entités chimiques et de leur utilisation en tant qu'intermédiaires de synthèse. La fonctionnalisation des 4H-pyrido[e][1,3]oxazin-4-ones, via des réactions de couplage pallado-catalysées, a permis d'obtenir des systèmes polyfonctionnalisés plus complexes. Les pyrido-

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6

Almeida, Leonardo Viana de. "Síntese e determinação da atividade antimicrobiana de 2-[5-nitro-tiofen-2-il]-3-acetil-5-[4-fenil-substituído]-2,3-diidro-1,3,4-oxadiazol frente à cepa ATCC 25923 de Staphylococcus aureus." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/9/9135/tde-07042010-131506/.

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A introdução de um grupo substituinte na molécula de um fármaco promove alterações químico-estruturais que, por sua vez, modificam suas propriedades físicoquímicas. O arranjo espacial de átomos ou grupos de átomos, em especial grupos funcionais, na molécula de um fármaco, expressos por meio de suas propriedades físico-químicas, influenciam direta ou indiretamente na interação fármaco-receptor. Esta, por sua vez, determina aspectos farmacológicos e farmacocinéticos que influem na eficácia terapêutica do medicamento. Assim, uma série de compostos 2-[5-nitro-tiofen-2-il]-3-acetil-5-[4-fenil-subst

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7

Wolf, Lucas. "Síntese de heterociclos: 2-alquil/arilcalcogeno-n-(4-aril-1,3-tiazol-2-il)acetamidas e (s)-n-(1-(3-aril-1,2,4-oxadiazol-5-il)alquil)-2-(calcogenofenil) acetamidas derivados de organocalcogênios." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/4271.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>In the present work, a series of 2-alkyl/arylchalcogenide-N-(4-aryl-1,3-thiazol-2-yl)acetamide was prepared via addition of aryl or alkyl chalcogenides. This methodology allowed the preparation of new derivatives of 2-amino-1,3-thiazoles in good yields. The compound synthesized is intended to evaluate the biological potential from the antioxidant activity by scavenging capacity of the assay by ABTS and DPPH. Was also developed a methodology for obtaining the compounds (S)-N-(alkyl-1-(3-aryl-1,2,4-oxadiazol-5-yl)-2-(phenylchalcogeni

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8

Pisarenko, Irina [Verfasser], та Joachim Kurt [Akademischer Betreuer] Fandrey. "Interaktionsanalyse der Hypoxie-induzierbaren Transkriptionsfaktoren HIF-2α und ARNT unter Berücksichtigung der Einflussnahme durch den HIF-2α-Liganden N-(3-Chloro-5-fluorophenyl)-4-nitrobenzo[c][1,2,5]oxadiazol-5-amine und verschiedener HIF-2α-Mutationen / Irina Pisarenko ; Betreuer: Joachim Kurt Fandrey". Duisburg, 2018. http://d-nb.info/1159879133/34.

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9

Singh, Neeraj. "Generation of 4,5-Dihydro-1,2,3-oxadiazole and Study of the Decomposition Products." Doctoral thesis, Universitätsbibliothek Chemnitz, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-191706.

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4,5-Dihydro-1,2,3-oxadiazoles are postulated to be key intermediates in the synthesis of ketones from alkenes on an industrial scale, alkylation of DNA in vivo, decomposition of N-nitrosoureas (potent carcinogens), and are also a subject of great interest for theoretical chemists. In this thesis, formation of the parent compound and decay into secondary products has been studied by NMR monitoring analysis. The elusive properties and the intermediacy of the parent compound, 4,5-dihydro-1,2,3-oxadiazole, in the decomposition of suitably substituted N-nitrosoureas using Tl(I) alkoxides as bases,

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10

Chen, Hui-shan, and 陳慧珊. "Calamitic Mesogens Formed by Heterocyclic Isoxazole, Benzoxazole and 1, 3, 4-Oxadiazole." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/8rc2n9.

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碩士<br>國立中央大學<br>化學學系<br>103<br>In the first series, a new system of isoxazole containing function group of aldehyde, performed reaction of Schiff Base then exhibition mesomorphic properties was synthesize and examined. 2b exhibited SmC phase. The control group 2a with N、SmC phase and 2c exhibited SmC phase. Results indicated that increasing the rigid cores would raise the isotropic temperatures and increasing the OH functional group would supply hydrogen bonds for molecular arrangement regularity. Using variable temperature IR spectroscopy observed the change of interaction. 1b、1c performed re

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11

Chiou, Ren-jie, and 邱仁傑. "Study on the Synthesis of 2-(4-Aminopheny)-1,3,4-oxadiazole and Their Derivatives." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/36905142200822575547.

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碩士<br>國立成功大學<br>化學系專班<br>96<br>Using conducting materials as emission layer (EML), Organic light-emitting diode (OLEDs) has been applied on monitors. Its contribution has drawn more and more attention from academic and industrial circles. Currently the components of electroluminescent are composed in the way of multi-layers, that means to paint a coating of electron transport layer (ETL) and hole transport layer (HTL) separately between electrode and emission layer, so as to control the injection balance of electron and hole and manufacture best luminous element. This study focuses on synthesi

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12

Chen, Ying-Jung, and 陳映蓉. "Anthryl-1,2,4-oxadiazole Substituted Calix[4]arenes as Highly Selective Fluorescent Chemodosimeters for Fe3+ Ion." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54379304577205610437.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>99<br>We report here the design and synthesis of a series of highly selective fluorescent chemodosimeters 45－49 for Fe3+, where 1,2,4-oxadiazoles were introduced to the lower-rim of calix[4]arene by using 1,3-dipolar cycloaddtion of aryl nitrile oxides with nitrile groups. Control compound 50 and isoxazole 51 were also synthesized for comparison. Structures of anthryl-1,2,4-oxadiazolyl cailx[4]arenes 45 and 50 were confirmed by X-ray diffraction analysis. 　　Anthryl-1,2,4-oxadiazole substituted calix[4]arenes 45－49 all showed a high selectivity and strong fluorescen

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13

Lin, Kuan-Ting, and 林冠廷. "Mesogenic Heterocycles Formed by Quinoxalines, Bis–pyrazoles, and Bis–1, 3, 4–Oxadiazoles." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/u7b64v.

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碩士<br>國立中央大學<br>化學學系<br>103<br>This thesis is devided into four different series. In series 1, two new structures of unsymmetric 1, 3, 4–oxa(thia)–diazoles 1a–b and 2 containing both quinoxaline and naphthalene moieties were prepared and their mesomorphic properties were investigated. The mesomorphic behavior of compounds 1–2 was studied by DSC analysis and polarized optical microscopy. All compounds 1a and 2 exhibited hexagonal columnar phases (Colh), which were also confirmed by powder XRD diffractometer. Ncell and Rar values equal to 5.23 and 22.73 Å within a slice of 9.0 Å thick were also

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14

Kuo, Yen-Ling, and 郭燕玲. "Studies on the Synthesis of 4-Aryl-2-substituted-1,3,4- oxadiazolin-5-ones and Their Derivatives from 3-Aryl- 4-chlorosydnones." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/89412243898895973906.

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15

Kučera, Ondřej. "Syntéza a studium derivátů 6-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)amino)hexanové kyseliny jako akcelerantů transdermální permeace léčiv." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-349897.

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Ondřej Kučera Charles University in Prague, Faculty of Pharmacy in Hradec Králové Synthesis and study of 6-((7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)amino)hexanoic acid derivatives as transdermal permeation enhancers Transdermal permeation enhancers are used to increase absorption of drugs through skin or, more importantly, through the stratum corneum, which is the uppermost layer of the skin. Mechanism of action of enhancers is not fully understood. In general the most active enhancers consist of hydrophilic and hydrophobic parts. In this work, we prepared and studied fluorescent permeation enha

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16

Riederer, Cordula [Verfasser]. "Zur Synthese von Tetrahydro-oxazolo[4,3-c]-1,2,4-oxadiazol-5-onen und Tetrahydro-oxazolo[4,3-c]-1,2,4-oxadiazin-6-onen aus 4-Hydroxyimino-oxazolidin-2-onen / Cordula Riederer." 1999. http://d-nb.info/957843496/34.

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17

Yang, Shun-Chiech, and 楊順傑. "(I) Reinvestigation of 3-Aryl-1,2,4-oxadiazole Derivatives as Highly Selective Fluorescent Chemodosimeter for Fe3+ (II) Syntheses of 1,3-Alternate Calix[4]arenes with Upper-rim Crown[5] and Lower-rim Methyl Triazoliumpyrene Derivatives for Ion Pair Sensing Studies." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/7wk6m3.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>101<br>In part 1, we successfully synthesized 1,2,4-oxadiazloe derivatives 24, 30a, 30b and 30c using 1,3-dipolar cycloaddtion reaction of anthryl nitrile oxide with a nitrile group. Compound 24 was found to show a high selectivity toward Fe3+ (among 18 different metal ions) in CH3CN with a strong fluorescence quenching. Compound 24 underwent a Fe3+-induced irreversible oxidation to afford compound X1 as the major product and compounds 25 and 26 as minor products. Compounds X1, 25 and 26 were isolated and characterized by organic spectroscopic data; furthermore, th

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