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Showing 1 to 20 of 273 for “"Diels-Alder"”.
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Asymmetric intramolecular Diels-Alder reactions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1986.
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Multicomponent Diels-Alder Sequences of 1-Aminodendralenes
… in multicomponent diene-transmissive Diels-Alder (DTDA) reaction sequences. Dendralenes have previously been shown to generate polycyclic frameworks in a step-economic manner. The 1-amino substituent is shown to promote very high levels of site selectivity in these processes. Chapter 1 …
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Multicomponent Diels-Alder Sequences of 1-Aminodendralenes
… in multicomponent diene-transmissive Diels-Alder (DTDA) reaction sequences. Dendralenes have previously been shown to generate polycyclic frameworks in a step-economic manner. The 1-amino substituent is shown to promote very high levels of site selectivity in these processes. Chapter 1 …
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Synthesis of Highly Fluorinated Diels-Alder Polyphenylenes
… to non-fluorinated analogues. Meanwhile, Diels-Alder polyphenylenes (DAPPs) are known for thermal stability as well as their rigid structure and glassy physical characteristics, which have led to a variety of film and membrane applications. This dissertation merges these two fields by …
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Diels-Alder addukt képződésének vizsgálata NMR spektroszkópia segítségével
… során a maleimid és furán származékok közti Diels-Alder reakció vizsgálatát és optimalizálását tűztük ki célul, valamint a keletkező DA addukt retro-Diels-Alder reakciójának a tanulmányozását. E célból egyrészt N-metoxikarbonil-furfurilamint, míg a másik esetben furán végcsoportokat …
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Diels-Alder thermoreversible polymer networks and their nanocomposites
L'abstract è presente nell'allegato / the abstract is in the attachment
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Diènophiles carbonylés dans la synthèse de Diels-Alder
Nous rapportons ici quelques résultats de réactions catalysées par les acides de Lewis entre les diènes et les diénophiles carbonylés. Le choix des réactions a été fait en fonction de la synthèse d'un squelette de la Cannivonine, un alcaloïde de canneberge ou les produits de sa dégradation et de …
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Intramolecular Diels-Alder reactions of conformationally restricted systems
… studying the respective thermal Intramolecular Diels-Alder (IMDA) properties. It was envisaged that the diene and dienophile would be linked via a conformationally restricted spacer, trans-cyc1ohexane-l,2-dicarboxylic acid anhydride.
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Retro-Diels-Alder routes to 4,5 disubstituted cyclopentenones
… corresponding stable enones. Achiral retro-Diets-Alder reactions were first attempted on 5-exo-substituted tricyclodecadienones using several Lewis-acid catalysts. 4-Substituted-2 cyclopentenones were isolated in good yield and no double bond rearrangement or decomposition was observed. Similar …
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Synthetic studies of the intramolecular Diels-Alder reaction
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1991.
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Stereochemical aspects of the intramolecular Diels-Alder reaction
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1982.
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Untersuchungen zu Struktur und Mechanismus eines Diels-Alder Ribozyms
… in einer [4+2]-Cycloaddition, eine sogenannten Diels-Alder Reaktion, katalysiert. Dieser künstliche RNA-Katalysator beschleunigt die Reaktion zwischen Anthracen- und Maleimidderivaten als erstes künstliches Ribozym in einer echten enzymatischen Katalyse. Das Ziel der vorliegenden Arbeit lag in …
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Studies Toward Highly Fluorinated Polyphenylenes by Diels-Alder Polymerization
Diels-Alder polyphenylenes (DAPPs) are chemically and thermally stable polymers, used for dielectric resins, gas separation membranes, and fuel cell proton exchange membranes. Highly fluorinated DAPPs are expected to have better thermal stability and chemical resistance, higher glass transition …
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Diels-Alder Reactions of 5-[Methoxypoly(Oxyethylene)]-(3E)-1,3-Pentadiene
… and 5-methoxyethoxy-(3E)-1,3-pentadiene (Ib). Diels-Alder reactions of Ia and Ib with acrolein, maleic anhydride, and diethyl acetylenedicarboxylate have been performed. The products of these reactions have been analyzed by spectroscopic techniques. The Diels-Alder adducts of Ia with maleic …
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The Effect of Pressure on a Catalyzed Diels-Alder Reaction
Made available in DSpace on 2014-12-10T21:24:46Z (GMT). No. of bitstreams: 1 7207033.pdf: 2016768 bytes, checksum: 34a308928028f8d6a0e8e8af34d3a903 (MD5) Previous issue date: 1971
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