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Dissertations / Theses on the topic 'Acetalius'

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Published: 3 June 2025
Last updated: 31 July 2025

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1

Juškėnas, Robertas. "Synthesis of tricyclic heterosystems based on pyrazolo[3,4-d]pyrimidine framework. Study of intramolecular reaction of pyrimidine nitrogen atom with O,O-acetals." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_154044-28576.

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The development of heterocyclic chemistry is important for various science areas and for the industry. The main task of this branch of chemistry is the search for the new, more effective synthetic methods for obtaining heterocyclic derivatives. That covers not only the formation of heterocycles, but also their functionalization, which leads to the creation of compounds having various chemical and physical properties. The accomplishments of this area are applied in biochemistry, pharmacochemistry, photophysics and other branches of science and industry. The creation of effective heterocycles sy
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2

Juškėnas, Robertas. "Triciklių heterosistemų, turinčių pirazolo[3,4-d]pirimidino fragmentą, sintezė. Intramolekulinės pirimidino azoto atomo reakcijos su O,O-acetaliais tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_154058-49723.

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Heterociklų chemijos vystymasis turi didelę reikšmę įvairioms mokslo sritims ir pramonės raidai. Pagrindinis šios chemijos srities uždavinys – kurti naujus heterociklinių junginių sintezės metodus, leidžiančius paprasčiau, efektyviau gauti norimos struktūros junginius. Tai apima ne tik heterociklų formavimo būdus, bet ir jų funkcionalizavimą, leidžiantį sukurti įvairiomis cheminėmis ir fizikinėmis savybėmis pasižyminčių junginių įvairovę. Šios mokslo srities pasiekimai pritaikomi biochemijoje, farmacijoje, fotofizikoje ir kitose mokslo ir pramonės šakose. Šiame darbe buvo siekiama sukurti efek
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3

Correia, Luis Miguel de Arez Romao e. Brito. "Chiral acetals." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308670.

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4

Gleixner, Renate Maria. "Asymmetric organocatalytic allylation of acetals." Thesis, University of Birmingham, 2012. http://etheses.bham.ac.uk//id/eprint/3579/.

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The addition of allylmetals to aldehydes, particularly in an asymmetric fashion, is of prime importance in the synthetic chemist’s arsenal of C–C bond-forming methodologies, as the secondary homoallylic alcohol products are primed for further transformations. So far, reagent-controlled approaches with chiral metal-based Lewis acids have been the most effective means for controlling the enantioselectivity of this reaction. However, this approach cannot be used when acetals are employed as the latent electrophiles. Since Brønsted acids also mediate the Hosomi-Sakurai reaction of acetals, we hypo
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5

Dominey, Andrew Philip. "The competitive formation of bicyclic acetals." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624108.

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6

Scott, Robert John. "Studies of the iron(III) mediated oxidative ring opening of cyclopropyl ethers and acetals for radical cyclisations." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327495.

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7

Ottone, Myrlene de Oliveira. "S?ntese de ?steres versus eterifica??o e de 1,3 e 1,5-dioxolanas versus condensa??o, catalisadas pelo catalisador amorfo e hidrof?lico, SiO2-SO3H." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1430.

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?rea de concentra??o: Qu?mica org?nica.<br>Data de aprova??o retirada da vers?o impressa do trabalho.<br>Palavras-chave ausentes no Resumo/Abstract.<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-08-04T17:58:56Z No. of bitstreams: 2 myrlene_oliveira_ottone.pdf: 35150534 bytes, checksum: f6a5ce4d99508eed910f62e1d6984580 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-08-14T13:58:08Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d4
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8

Parrain, Jean-Luc. "Acetals organostanniques : preparation, reactivite et utilisations en synthese organique." Nantes, 1990. http://www.theses.fr/1990NANT2005.

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Des vinyletains portant une fonction acetal en position allylique ou homoallylique ont ete synthetises par hydrostannation des alcynes appropries a l'echelle de la demi-mole. Ces nouveaux reactifs, facilement stockables, se comportent respectivement comme de remarquables equivalents de beta-formylvinyl-anions ou de beta-(formylmethyl) vinylanions. Leurs potentialites ont ete principalement explorees au travers des reactions impliquant des transmetallations par le butyllithium ou les cyanocuprates ainsi que dans les reactions de couplage avec les halogenures d'aryle et d'acyle effectuees en pre
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9

Ye, Guozhong. "Synthesis and reactions of cyclic ketene-N,N-acetals." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-09142008-210135.

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10

Thavornprasert, Kaew-arpha. "Production of acetals from bio-resourced alcohols over bifunctional catalysts." Electronic Thesis or Diss., Lille 1, 2013. http://www.theses.fr/2013LIL10016.

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La biomasse est une matière première renouvelable pour un large éventail de produits chimiques à haute valeur ajoutée, comme les carburants. Les acétals, tels que le diméthoxyméthane (DMM) et le diethoxyéthane (DEE), peuvent être ainsi produits à partir respectivement du méthanol et de l'éthanol. Cette étude concerne la synthèse des acétals via une conversion directe de l'alcool. La synthèse en DMM est étudiée sur un catalyseur oxyde mixte FeMo faisant intervenir les fonctions d'oxydo-réduction et acide. 50% de rendement en DMM est obtenu à 255 °C sur le catalyseur comportant un rapport Mo/Fe
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11

Ray, Colin Andrew. "Development of a recyclable acetic ester enolate equivalent." Thesis, University of Salford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365994.

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12

Sardessai, R. S. "Inositol 1,3-acetals as versatile intermediates for the synthesis of cyclitol derivatives." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5877.

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13

Dossetter, Alexander Graham. "An approach to the total synthesis of neoliacinic acid, a highly oxygenated sesquiterpene lactone." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243491.

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14

Łukaszczyk, Jan. "Wpływ struktury wielopodstawionych pochodnych dioksolanu na reakcje przeniesienia jonu wodorkowego oraz aktywność odpowiednich soli dioksoleniowych w polimeryzacji cyklicznych acetali." Praca habilitacyjna, Wydawnictwo Politechniki Śląskiej, 1985. https://delibra.bg.polsl.pl/dlibra/docmetadata?showContent=true&id=5781.

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15

Salter, D. P. "The synthesis and chemistry of ketene-o,o-acetal and ketene-o,s,acetals." Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381786.

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16

Fryling, James Allen. "Enantiomerically pure acetals in organic synthesis: Resolutions and diastereoselective alkylations of alpha-hydroxy esters." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185332.

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The diastereomeric tetrahydropyranyl (THP) and tetrahydrofuranyl (THF) ethers of a variety of α-hydroxyesters were synthesized and separated by column chromatography. The separability of the diastereomers was found to be a general phenomenon which allowed for wide variations in both the THP/THF ring and the α-hydroxyester. The resolved compounds could be deprotonated and alkylated diastereoselectively with a variety of electrophiles. The diastereoselectivity ranged from 1:1 to 12:1 depending on the α-hydroxyester, the alkylating agent, and the reaction conditions. In most cases the diastereome
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17

Hedir, Guillaume. "Functional degradable polymers via RAFT/MADIX mediated polymerization of cyclic ketene acetals and vinyl monomers." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/81939/.

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This thesis explores the synthesis of functional degradable polymers via the radical ringopening polymerization (rROP) of cyclic ketene acetal (CKA) monomers and their copolymerization with vinyl ester monomers using the reversible addition-fragmentation chain transfer (RAFT/MADIX) polymerization. Chapter 1 introduces the polymerization technique used in this thesis (namely RAFT polymerization) and gives a summary of the conventional and new approaches to synthesize poly(esters) for use as degradable materials, with a focus on the arising use of rROP of CKA monomers. In Chapter 2 the copolymer
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18

Brailsford, Wayne. "Iron(III) mediated oxidative cleavage of cyclopropanone acetals for the stereoselective formation of functionalised cyclopentanes." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267708.

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19

Sutton, Peter William. "Ketene cycloadditions to cyclohexa-3,5-diene-cis-1,2-diol acetals : preparation of polyhydroxylated cyclohexane derivatives." Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294477.

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20

Mermerian, Ara Haig 1976. "Enantioselective reactions of silyl ketene acetals and silyl ketene imines catalyzed by planar-chiral heterocycles." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28700.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2004.<br>Vita.<br>Includes bibliographical references.<br>(cont.) imine.<br>The enantioselective C-acylation of cyclic silyl ketene acetals was achieved catalytically by employing planar-chiral heterocycles derived from 4-(pyrrolidino)pyridine. Key mechanistic features of this process involve activation of both the electrophile (acylating agent --> acylpyridinium) and the nucleophile (silyl ketene acetal --> enolate). This process accomodates a wide variety of aryl- and heteroaryl-substituted silyl ketene acetals, furn
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21

Bertounesque, Emmanuel. "Aldolisation dirigee : reactivite des bis (trimethylsilyl)-acetals de cetenes et des esters de trimethylsilyle -trimethylsilyles." Paris 7, 1987. http://www.theses.fr/1987PA077287.

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Dans un premier temps, la reactivite des composes du titre est etudiee. Ces composes reagissent ainsi avec des aldehydes pour donner des -hydroxyacides. La seconde partie traite de la synthese des esters de trimethylsilyle -trimethylsilyles. Enfin, la synthese de -chloroacides a partir des bis-trimethylsilyl acetals de cetenes est realisee
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22

Penkala, Mateusz. "Otrzymywanie acetali w katalizowanych kompleksami rutenu reakcjach eterów allilowych i winylowych z alkoholami i fenolami." Doctoral thesis, Katowice : Uniwersytet Śląski, 2013. http://hdl.handle.net/20.500.12128/5434.

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Celem pracy jest synteza nowych acetali symetrycznych i niesymetrycznych w reakcjach addycji alkoholi i fenoli do eterów allilowych (alkilowych i arylowych) oraz eterów winylowych. Przedmiotem badań była również katalizowana przez kompleksy metali, kwasy Lewisa oraz kwasy protonowe cyklizacja eterów allilowych i winylowych glikoli prowadząca do acetali cyklicznych. Generalnie, przedmiotem dysertacji była więc między i wewnątrzcząsteczkowa addycja grupy OH do wiązania podwójnego allilowego lub sprzężonego z atomem tlenu. Praca ma na celu również poznanie ograniczeń wynikających ze stosowania t
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23

CINTRAT, JEAN-CHRISTOPHE. "Acetals alpha-stanniques et 2-stannyl oxazolidines precurseurs d'organostanniques alpha-oxygenes et alpha azotes chiraux." Nantes, 1995. http://www.theses.fr/1995NANT2083.

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Une nouvelle methode d'acces a des precurseurs de carbanions alpha-heterosubstitues chiraux est proposee apres avoir considere les differents modes d'acces et la stabilite chimique, thermodynamique et configurationnelle de ces anions. Des acetals alpha-stanniques chiraux et des 2-stannyl oxazolidines chirales n-protegees sont obtenues par transacetalisation du diethoxymethyltributyletain par des diols de symetrie c#2 ou par des beta-aminoalcools n-sulfonyles ou n-alcoxycarbonyles enantiopurs. Leur transmetallation par le n-butyllithium dans le thf a -78c conduit a des equivalents de formylanio
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24

Mandrelli, Francesca [Verfasser], Benjamin [Gutachter] List, and Hans-Günther [Gutachter] Schmalz. "Asymmetric Organocatalysis with bis-Silyl Ketene Acetals / Francesca Mandrelli ; Gutachter: Benjamin List, Hans-Günther Schmalz." Köln : Universitäts- und Stadtbibliothek Köln, 2019. http://d-nb.info/120419937X/34.

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25

Hayes, Patricia. "Premiers exemples d'heterocycloadditions 4 + 2 intermoleculaires de 3-sulfinyloxabuta-1,3-dienes chiraux application a la synthese de pheromones acetaliques." Le Mans, 1998. http://www.theses.fr/1998LEMA1002.

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Cette these est une contribution a la mise au point de nouvelles methodologies de synthese diastereoselectives utilisant un sulfoxyde comme vecteur de chiralite. D'une part, une methode originale de dedoublement du p-tolylvinylsulfoxyde racemique a ete mise au point, utilisant une reaction tandem addition-elimination d'un alcool chiral. Elle a permis un acces simple et plus rapide aux deux antipodes enantiopurs du vinylsulfoxyde par rapport aux syntheses existantes. D'autre part, des 3-sulfinyloxabuta-1,3-dienes racemiques et optiquement actifs, differemment substitues, ont ete synthetises sel
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26

Wild, Carl. "Trifluoroethyl enol ethers, dienol ethers, and acetals: an investigation of their preparations, reactivities, and synthetic applications." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/54459.

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The major portion of this work details our investigation of trifluoroethoxy (TFE) substituted compounds with particular emphasis given to their preparation and possible applications. The three types of compounds studied were trifluoroethoxy substituted ketals, enol ethers, and dienol ethers. The ketal and enol ether work involved developing methodology for the large scale preparation of these structures as well as studies detailing their behavior. For the TFE ketals, preparation involved an acid-catalyzed alcohol exchange reaction. Applications included their use as non-complexing/acid-stable
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27

Mykhaylychenko, Sergiy. "Study of perfluoroketene dithioacetals and N,S-acetals for the synthesis of fluorinated acyclic and heterocyclic compounds." Rouen, 2008. http://www.theses.fr/2008ROUES066.

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Les dithioacétals de perfluorocétènes sont des « synthons » simples et polyvalents pour la synthèse d'une large variété de composés fluorés acycliques et cycliques. Des transformations efficaces et directes des g-lactones a,b-insaturées en g-lactames et en pyridazin-3-ones substitués par un groupement 2,2,2-trifluoroéthyle ont été effectuées, à partir d'amines primaires et d'hydrazines variées et des dithioacétals de perfluorocétènes. La structure de tous les nouveaux composés a été assignée en utilisant les données de RMN (19F, 1H, 13C), d'IR et de MS et par diffraction des rayons X. Les réac
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28

Romo, Fernández Juan Manuel. "Stereoselective reactions of N-acyl thiazolidinethiones with trimethyl orthoformate, acetals and diarylmethyl ethers catalyzed by nickel(II) complexes." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/301278.

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In this Doctoral Thesis a new stereoselective Ni(II)–mediated catalytic system for the SN1–like addition of chiral N­acyl thiazolidinethiones to electrophiles able to deliver cationic species under acidic conditions has been developed. Importantly, the nickel(II) complexes used along our studies are structurally simple, commercially available and easy to handle. These complexes coordinate to thioimides to generate an intermediate that, after deprotonation, afford a putative nickel(II) enolate, which is the real nucleophile. In Chapter 1, a totally stereoselective addition of N­acyl thiazol
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29

Guarda, Emerson Adriano. "Utilização de líquidos iônicos na síntese de enonas e de enaminonas." Universidade Federal de Santa Maria, 2009. http://repositorio.ufsm.br/handle/1/4172.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The use of ionic liquids 1-butyl-3-methylimidazolium tetrafluorborate ([BMIM] [BF4]) and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) as catalytic solvent in the synthesis of 1,1,1-trichloro(fluoro)-3-alken-2-onas [CX3C(O)C(R2)=C(R1)OR] from the reaction of enolethers or acetals with acyl halides is reported. The results obtained in the presence of ionic liquids were compared with those obtained in the conventional condition already developed in our laboratory, and they demonstrated great improvement in the reactio
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30

Ingle, Gajendrasingh. "Chiral BINOL Metal Phosphate/Phosphoric Acid Catalyzed Enantioselective Addition of Phosphorus and Sulfur Nucleophiles to Imines and Epoxides." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4339.

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The research presented in this dissertation focuses on chiral BINOL metal phosphatephosphoric acid catalyzed enantioselective additions of phosphorus and sulfur nucleophiles to imines and epoxides. In chapter 2, we reported a new method to synthesize chiral amino phosphine oxides. The reaction combines N-substituted imines and diphenylphosphine oxide catalyzed by chiral magnesium 9-antryl phosphate. A wide variety of aliphatic and aromatic aldimines substituted by electron neutral benzhydryl or dibenzocycloheptene groups were excellent substrates for the addition reaction. The imines protected
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31

Commencais, Céline. "Etude de l'acétalisation de composés aromatiques. Synthèse de méthacrylamides et d'esters méthacryliques (A)cétales. Application à la synthèse de réticulants basse température." Metz, 2002. http://www.theses.fr/2002METZ038S.

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Peu de monomères esters méthacryliques ou méthacrylamides comportant une fonction acétal i sont décrits dans la littérature. Nous avons réalisé la synthèse de nouveaux monomères réticulants. De faire varier le bras espaceur entre la fonction méthacrylique et la fonction acétal, nous avons introduit soit I Acetalisation study of aromatics compounds Synthesis of methacrylamides and methacrylic esters having an ac Application to the synthesis of low temperature cross-li I I un groupement aromatique et(ou) un atome de soufre, soit un groupement amide. Après une partie bibliographique axée sur les
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32

Aponte-Guzman, Joel. "Ring-Opening Benzannulations of Cyclopropenes, Alkylidene Cyclopropanes, and 2,3-Dihydrofuran Acetals: A complementary Approach to Benzo-fused (Hetero)aromatics." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54916.

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Over the past decades, functional group manipulation of aromatic precursors has been a common strategy to access new aromatic compounds. However, these classical methods, such as Friedel-Crafts alkylations and electrophilic/nucleophilic aromatic substitutions, have shown lack of regioselectivity besides the use of activators in excess amounts. To this end, numerous benzannulations to form benzo-fused substrates via Diels-Alder (DA), ring-closing metathesis (RCM), cycloaddition, and transition-metal-promoted processes have been reported. Appending a benzene ring directly onto a pre-existing rin
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33

Gonda, Elizabeth. "Cyclic Ether Synthesis via Lewis Acid Promoted Carbon-Carbon Bond Forming Cyclization Reactions of Unsaturated and Saturated Symmetric Acetals." W&M ScholarWorks, 1988. https://scholarworks.wm.edu/etd/1539625450.

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34

Qin, Huiping. "Synthetic studies of the repeating unit of the C-polysaccharide of Streptococcus pneumoniae and studies of alkylation of carbohydrates using dialkylstannylene acetals." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24784.pdf.

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35

Patil, Shradha Vasant. "Radical additions of hydrocarbons, ethers and acetals to alkenes via allyl transfer reaction: A new chain reaction for C-H bond functionalization." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50658.

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Functionalization of hydrocarbons via a free-radical based allyl transfer reaction using various allyl bromide substrates has been previously studied. The work described in this dissertation focuses on the replacement of Br by phthalimido-N-oxyl (PINO ) which helps make this chemistry environmentally friendly. To replace Br with PINO , replacement of previously used allyl-bromide substrates with new allyl-PINO substrates were necessary. Various allyl- PINO compounds were synthesized and the use of these allyl-phthalimido-N-oxyl (allyl-PINO) compounds for the functionalization of various alky
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36

Namazi, Hassan. "Novel regioselective syntheses of carbohydrate clusters and ß-cyclodextrin derivatives and studies of the reactions of dialkylstannylene acetals of carbohydrate-derived cis-1,2-diols." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24757.pdf.

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37

Ibrahim, Sherif M. S. "Quinazolin-2-yl-guanidines for treatment of neuropsychiatric disorders and the oxidative preparation of N,O-acetals linked to the amide bond of peptides." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6437.

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This thesis consists of two parts, both on synthetic chemistry with medicinal and biological relevance. Part one aims to develop methods for the preparation of quinazoline derivatives. A streamlined method for the preparation of 6-substituted-4-methyl-2-quinazolyl-guanidines and their respective amides has been presented here, using inexpensive and readily available starting materials such as para-bromoaniline, dicyandiamide (DCDA), and other reagents that are well-established for reactions such as Heck coupling, Suzuki coupling, and Ullman coupling reactions. In part two a novel methodology w
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38

Čorić, Ilija [Verfasser], Benjamin [Akademischer Betreuer] List, Hans-Günther [Akademischer Betreuer] Schmalz, and Daniel [Akademischer Betreuer] Seidel. "Asymmetric Brønsted Acid Catalysis: Acetals & Confined Catalysts / Ilija Čorić. Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr. Gutachter: Benjamin List ; Hans-Günther Schmalz ; Daniel Seidel." Köln : Universitäts- und Stadtbibliothek Köln, 2012. http://d-nb.info/1038359422/34.

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39

Birrell, James Andrew. "I. Enantioselective Acylation of Silyl Ketene Acetals through Fluoride Anion-Binding Catalysis II. Development of a Practical Method for the Synthesis of Highly Enantioenriched Trans-1,2-Amino Alcohols." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11037.

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A highly enantioselective acylation of silyl ketene acetals with acyl fluorides was developed to generate useful α,α-disubstituted butyrolactone products in high yield and excellent enantioselectivities. This transformation is promoted by an arylpyrrolidino thiourea catalyst and 4-pyrrolidinopyridine and represents the first example of enantioselective thiourea anion-binding catalysis with fluoride. Mechanistic investigations revealed both catalysts to be necessary for reaction to occur, suggesting the thiourea aids in the generation of the key N-acylpyridinium/fluoride ion pair. The outstandi
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40

Gozlan, Charlotte. "Synthèses éco-compatibles de nouveaux composés amphiphiles biosourcés à base sucre et leurs applications en tant que tensioactifs et antimicrobiens." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10249.

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Les travaux de recherche décrits dans ce manuscrit s'inscrivent dans le cadre de la chimie verte et du développement durable qui visent notamment l'emploi de matières premières issues de ressources renouvelables et la mise au point de procédés éco-compatibles pour la préparation de nouveaux produits à visées alimentaire, domestique ou thérapeutique. Dans ce contexte, une nouvelle voie d'accès aux acétals et éthers de monosaccharides (sorbitane et glucopyranoside de méthyle) a été développée. La synthèse se divise en deux étapes avec une première réaction d'acétalisation ou de transacétalisatio
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Troeltzsch, Christina. "Controlled/living polymerizations : a. synthesis of block copolymers with bicyclic acetals by cationic ring opening polymerization : b. synthesis and study of tetradentate ligands coordinated to Cu(I) and Cu(II) for use as ATRP catalysts /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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Crane, Sheldon N. "Geminal acylation of ketones and acetals : use of methyl-substituted analogues of 1,2-bis[trimethylsilyl(oxy)]cyclobutene and application of this methodology in model studies aimed toward an enantioselective synthesis of the antitumor antibiotic fredericamycin A /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0015/NQ54845.pdf.

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43

Delplace, Vianney. "Synthèse de polymères vinyliques pégylés dégradables par polymérisation radicalaire contrôlée par les nitroxydes." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA114835/document.

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La nanomédecine, appliquée en particulier au traitement du cancer, suscite depuis une quinzaine d’années un intérêt grandissant, développant des stratégies innovantes pour le ciblage spécifique de tissues malades. De nouveaux progrès en la matière sont encore à venir, mais nécessitent de nouveaux matériaux offrant une grande flexibilité en termes de synthèse, ainsi que la possibilité de fonctionnalités et de propriétés physicochimiques variées ; avantages tous présentés par l’utilisation des techniques de polymérisation radicalaire contrôlée (CRP). Ces techniques de polymérisation ont déjà dém
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Tran, Johanna. "Polyesters Fonctionnels par Polymérisation Radicalaire par Ouverture de Cycle, une Plateforme Nanoparticulaire pour la Délivrance de Principe Actif pour les Maladies Cardiovasculaires." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS563.

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D’après l’Organisation Mondiale de la Santé (OMS), les maladies cardiovasculaires (CVDs) sont la cause majeure de morbidité et de mortalité dans le monde. Dans un contexte où les thérapies non chirurgicales impliquent une administration de molécules actives à hautes doses, limiter les effets secondaires et augmenter l’efficacité thérapeutique est un enjeu majeur. Une possible réponse à cette problématique est l’utilisation de nanoparticules polymères encapsulant des molécules actives. Pour des applications de délivrance de principe actif et/ou de génie tissulaire, les polymères utilisés doiven
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Guegain, Elise. "Prodrogues Polymères Dégradables par Polymérisation Radicalaire par Ouverture de Cycle Contrôlée par les Nitroxydes." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS569.

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La copolymérisation radicalaire par ouverture de cycle contrôlée par les nitroxydes entre les esters méthacryliques et les acétals de cétène cycliques a permis de synthétiser des copolymères vinyliques bien contrôlés et dégradables contenant des fonctions esters le long de la chaine polymère. Plus précisément, des copolymérisations entre le 2-méthylène-4-phenyl-1,3-dioxolane (MPDL) et l’oligo(éthylène glycol) méthyl éther méthacrylate (OEGMA) ou le méthacrylate de méthyle (MMA) ont été amorcées par une alkoxyamine basée sur le nitroxyde SG1. Des copolymères de type P(OEGMA-co-MPDL) et P(MMA-co
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Aspin, Samuel. "Arylation migratoire C(sp3)-H d'énolates d'esters." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10298.

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La fonctionnalisation C(sp3)-H catalysée par des métaux de transitions, ouvre de nombreuses perspectives en synthèse organique, permettant des voies d'accès plus économes en atomes, et en étapes à des molécules à forte valeur ajoutée. Dans cette optique, une méthode efficace permettant l'arylation des liaisons C(sp3)-H en position α d'un groupement attracteur, plus communément appelée α -arylation a récemment fait l'objet d'une attention toute particulière de la part de la communauté scientifique. Le travail détaillé dans ce manuscrit décrit les dernières avancées de cette méthodologie, ainsi
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Honoré, Jean-Claude. "Conception et synthèse de nouveaux acétals de cétènes cycliques pour l’obtention de polyesters aliphatiques fonctionnalisés." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0045.

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Les polyesters aliphatiques représentent l’une des familles de polymères les plus utilisées à ce jour dans de nombreux domaines. Leurs propriétés de (bio)dégradation en font des matériaux très intéressants pour des applications environnementales ou biomédicales. Obtenus traditionnellement par polycondensation, biosynthèse ou polymérisation par ouverture de cycle (ROP), ces procédés ne permettent pas aisément la réalisation de matériaux cumulant dégradabilité et propriétés des polymères issus de monomères vinyliques. L’utilisation de monomères spécifiques, les acétals de cétènes cycliques (CKA)
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"Studies on Stereoselective Reactions of Acetals." Thesis, 1991. http://hdl.handle.net/2237/11195.

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石原, 一彰, and Kazuaki Ishihara. "Studies on Stereoselective Reactions of Acetals." Thesis, 1991. http://hdl.handle.net/2237/11195.

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Henning, Hendrik. "Ethers and acetals in aluminium triflatepromoted reactions." Thesis, 2013. http://hdl.handle.net/10210/8561.

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M.Sc. (Chemistry)<br>The work in this thesis describes some catalytic reactions of aluminium triflate. This Lewis acid has been shown to be of great value in the catalysis of several types of organic transformations. These include but are not limited to the alcoholysis and aminolysis of epoxides, uses in methoxycarbonylation catalysis and in esterification reactions. Therefore, aluminium triflate holds promise for application in both the bulk and fine chemistry industries. Aluminium triflate has received little interest compared to some other, more costly triflates such the lanthanide triflate
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