Tesis sobre el tema "Heterocyclic chemistry"
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Perrins, Ross. "Heterocyclic chemistry of trithiazyl trichloride". Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283411.
Texto completoJones, Louise. "Combinatorial, heterocyclic and guanidine chemistry". Thesis, Bangor University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429865.
Texto completoHenderson, Neil. "Studies in nitrogen heterocyclic chemistry". Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280300.
Texto completoSimcox, Michael Thomas. "Some aspects of nitrogen heterocyclic chemistry". Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/10544.
Texto completoCivcir, Pervin Unal. "Extended heterocyclic systems". Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332359.
Texto completoKaratza, Mary-Helen. "Extended heterocyclic systems". Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359850.
Texto completoCollier, Steven James. "Heterocyclic ortho-quinodimethanes". Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366249.
Texto completoWhite, Lindsay Anne. "Heterocyclic o-quinodimethanes". Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262608.
Texto completoLapinsky, David J. "STUDIES IN AZIRIDINE-ALLYLSILANE CHEMISTRY: EXTENSION OF SCOPE". Columbus, OH : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1038954949.
Texto completoTitle from first page of PDF file. Document formatted into pages; contains xx, 256 p.: ill. (some col.). Includes abstract and vita. Advisor: Stephen C. Bergmeier, College of Pharmacy. Includes bibliographical references (p. 234-256).
Pedersen, Jan Mondrup. "Amides as radical precursors in heterocyclic chemistry". Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/34502.
Texto completoLewis, William. "Chiral Heterocyclic Ligands". Thesis, University of Canterbury. Chemistry, 2007. http://hdl.handle.net/10092/1383.
Texto completoMyers, Eddie Leonard. "Heterocyclic aromatic nucleic acids". Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79056.
Texto completoJones, Richard G. "Studies in heterocyclic synthesis". Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238268.
Texto completoChauncey, Marek Anthony. "Reactions heterocyclic quinone methides". Thesis, University of Ulster, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328193.
Texto completoNicolson, Neil James. "Some new heterocyclic thermosets". Thesis, University of St Andrews, 1996. http://hdl.handle.net/10023/15293.
Texto completoHolt, Jarle. "Nitropyridine carbamates, amides and carboxylates in heterocyclic chemistry". Doctoral thesis, Norwegian University of Science and Technology, Department of Chemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1830.
Texto completoBased on new methodology for nitration of pyridine and pyridine derivatives developed at our department by Professor Jan Bakke and coworkers at NTNU, a whole range of substituted nitropyridines are now readily available. The method provides new possibilities in heterocyclic chemistry for the preparation of new materials. Due to the importance and useful properties of many pyridine-based compounds, the chemistry of nitropyridine derivatives is being investigated by our group at NTNU and results for nitropyridine carbamates, amides and carboxylates are presented in this thesis. These nitropyridine derivatives have been used as substrates for the formation of new bisheterocyclic compounds and pyridine derivatives. New synthetic routes to fused heterocycles have been developed.
Chapter 2 and Paper I presents the preparation, stability and reactivity of nitropyridine isocyanates (13, 23), a new class of compounds in organic chemistry. The introduction of an electronegative substituent represented by the nitro group was expected to reduce the basisity of the pyridine nitrogen, hence decrease the rate of dimerisation and increase the reactivity of the isocyanate carbon towards a nucleophile. The preparation of nitropyridine isocyanates (13, 23) are reported.
Isocyanates constitute an important class of compounds in organic chemistry and undergo a series of reactions to yield a variety of interesting products includingheterocyclic derivatives. Heterocyclic isocyanates, however, have not received the same attention as the respective aromatic compounds in synthesis and reactivity studies because of their instability and high reactivity. 2-Pyridine isocyanate dimerises while the 4-isomer trimerises to form the trimer.
Chapter 3 and Paper I presents the preparation, stability and reactivity of the isocyanate dimer and trimer. The isocyanate dimer (28) was formed in high yield from the reactive 5-nitro-2-pyridine isocyanate (23) by a [2+4]-cycloaddition reaction. Another byproduct in the preparation of the isocyanate using oxalyl chloride was the tetrone (26).
The isocyanate trimer was formed from the unstable 4-pyridine isocyanate for reference purposes. The trimer proved to be less stable than previously reported and afforded 4-aminopyridine and methyl 4-pyridine carbamate as decomposition products in the presence of moisture and alcohols, respectively. This demonstrates that the reactive trimer can be used as a protected version of the isocyanate for synthetic purposes.
Chapter 4 and Paper II presents studies of the nitropyridine isocyanates in cycloaddition reactions. The reactivity of the nitropyridine isocyanates in 1,3-dipolar cycloaddition reactions with trimethylsilylazide and 3,5-dimethylpyridine N-oxide to afford tetrazolinones (41, 43) and substituted amines (52, 55) was investigated. A [2+4]-cycloaddition reaction of nitropyridine isocyanate with diphenylketene was also studied. The cycloadduct (59) was formed. These results demonstrate the potential of the nitropyridine isocyanates to undergo cycloaddition reactions.
Application of nitropyridine carbamates, amides and carboxylates in the formation of new heterocyclic compounds have been investigated and discussed in Chapter 5-7.
Chapter 5 and Paper III presents the aromatic nucleophilic substitution reaction of the nitro group of methyl 3-nitro-4-pyridine carboxylate. The nitro group was successfully replaced by nitrogen, oxygen and sulfur nucleophiles to afford the substitution products (16a-d) in moderate yields.
Chapter 6 and Paper IV presents the cyclization reaction of nitropyridine carbamates for the formation of 1,3-dihydro-2H-imidazo[4,5-c]pyridin-2-one (79a-b), a biologically active compound. A facile acid-catalysed cyclization method for the preparation of the cyclic urea by traditional heating and the corresponding microwave-promoted reaction were developed. Both methods afforded the cyclic urea in high yield and represent a “green method” for the preparation of this compound.
Chapter 7 and Paper V presents the preparation of 1H-1,2,3-triazol [4,5-c]pyridine (86) and N-acyl and N-alkoxycarbonyl triazolo[4,5-c]pyridine derivatives (96a-e, 98a-e). The triazolopyridine derivatives were readily formed by diazotization and cyclization of the respective nitropyridine carbamates and amides in high yields. The application of triazolo[4,5-c]pyridine derivatives (98a-e) in the acylation of amines and amino acids was investigated. They proved to be more effective than the commercially available benzotriazole and afforded the protected amines in high yields under mild conditions.
Speirs, Richard Allan. "New reagents and syntheses in heterocyclic organoselenium chemistry". Thesis, University of St Andrews, 1986. http://hdl.handle.net/10023/15417.
Texto completoLiu, Jing. "Heterocyclic small molecule peptidomimetics". [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3125.
Texto completoFishwick, C. W. G. "Azaxylylenes and their heterocyclic analogues". Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356266.
Texto completoBrown, J. W. "Studies of heterocyclic reaction mechanisms". Thesis, Bucks New University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356206.
Texto completoJenkins, Graham. "Heterocyclic analogues of ortho-xylylene". Thesis, University of Liverpool, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279695.
Texto completoLarge, Janet. "Asymmetric induction using heterocyclic precursors". Thesis, Open University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272951.
Texto completoHu, Gang. "Conducting polymers from heterocyclic compounds". Thesis, Open University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240331.
Texto completoScarisbrick, Andrew Colin. "Transition metal chemistry of anionic functionalised N-heterocyclic carbenes". Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415903.
Texto completoFoster, R. W. "Sustainable approaches to novel heterocyclic scaffolds for medicinal chemistry". Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1470876/.
Texto completoBurrows, Kenneth Dvid. "The chemistry of some heterocyclic analogues of triphenylmethane dyes". Thesis, University of Central Lancashire, 1985. http://clok.uclan.ac.uk/20234/.
Texto completoHo, Yee-Ping. "Some studies in nitrogen heterocyclic chemistry using Reissert compounds". Thesis, Loughborough University, 1986. https://dspace.lboro.ac.uk/2134/33250.
Texto completoAlsulami, Rabah Nafa. "SYNTHETIC APPROACHES TO HETEROCYCLIC BICYCLO[2.1.0]PENTANES". Bowling Green State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1309446512.
Texto completoWalji, Dhiran. "A radical approach towards the synthesis of novel pyridine and pyrimidine based heterocycles". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2009. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=62164.
Texto completoWilson, Jennifer M. "Synthesis of biologically active heterocyclic compounds". Thesis, University of Glasgow, 2007. http://theses.gla.ac.uk/45/.
Texto completoRichardson, K. A. "The synthesis of heterocyclic prostacyclin analogues". Thesis, University of East Anglia, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355353.
Texto completoChaloner, Lynne Marie. "Heterocyclic o-quinodimethanes from 3-sulfolenes". Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333628.
Texto completoOrrling, Kristina M. "On the Versatility of Microwave-Assisted Chemistry : Exemplified by Applications in Medicinal Chemistry, Heterocyclic Chemistry and Biochemistry". Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-101356.
Texto completoDeane, Philip O'Grady. "Synthetic and mechanistic studies of heterocyclic systems". Thesis, Rhodes University, 1996. http://hdl.handle.net/10962/d1005044.
Texto completoOrton, Edward. "Synthesis and chemistry of 4,5-dimethylene-1,3-dioxolan-2-one and related compounds /". Thesis, Connect to this title online; UW restricted, 1985. http://hdl.handle.net/1773/8620.
Texto completoGanto, Mlungiseleli MacDonald. "Application of Baylis-Hillman methodology in the construction of complex heterocyclic targets". Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1006703.
Texto completoNocanda, Xolani Wittleton. "Applications of Baylis-Idllman methodology in the synthesis of chromene derivatives". Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1018257.
Texto completoBemowski, Ross David. "Novel N-heterocyclic dicarbene ligands and molybdenum and dimolybdenum N-heterocyclic carbene complexes". Diss., University of Iowa, 2013. https://ir.uiowa.edu/etd/1291.
Texto completoDiebolt, Olivier. "N-heterocyclic carbene ligands in palladium and iridium organometallic chemistry". Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/2126.
Texto completoWilson, John Daniel. "Metal complexes of heterocyclic thiones and thionates". Thesis, Northumbria University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333906.
Texto completoIngate, Simon Thomas. "Conformation and reactivity of 1,3-heterocyclic systems". Thesis, University of Portsmouth, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304065.
Texto completoArchbold, Trevor. "Synthesis and functionalisation of heterocyclic[2.2.2]octanes". Thesis, University of Liverpool, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288305.
Texto completoCrew, Andrew Philip Austin. "Approaches to heterocyclic analogues of o-xylyene". Thesis, University of Liverpool, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316473.
Texto completoPlant, A. "Metallation approaches to heterocyclic analogues of orthoxylylene". Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384397.
Texto completoCrockett, Rowena. "Generation of free radicals from heterocyclic compounds". Thesis, University of Aberdeen, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290239.
Texto completoBerthelot, Didier. "Synthesis of novel heterocyclic #alpha#-amino acids". Thesis, Open University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367226.
Texto completoYoshida, Shu. "Design synthesis and characterization of novel heterocyclic polymers". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0008/NQ37033.pdf.
Texto completoO'Donovan, Jacqueline Patricia. "The synthesis and properties of substituted heterocyclic mesogens". Thesis, Kingston University, 1993. http://eprints.kingston.ac.uk/20570/.
Texto completoVincent-Rocan, Jean-François. "N-Isocyanates : Versatile Intermediates in Heterocyclic Synthesis". Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34864.
Texto completoArmugam, S. "Studies on N-Heterocyclic Compounds". Thesis, Indian Institute of Science, 1994. https://etd.iisc.ac.in/handle/2005/108.
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