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Showing 1 to 20 of 226 for “"ENE"”.
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Diazetines, diazetidines, and mechanisms of the ene reaction
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1982.
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Total Synthesis Of 1,10-Diphenylbicyclo[8.8.8]hexacos-5-ene
… of 1,10-diphenylbicyclo[8.8.8]hexacos-5-ene over 15 steps has been developed. The synthesis was engineered pushing most difunctional intermediates to quantitative completion thereby mini-mizing purification steps. The multi-gram synthesis can be conveniently performed by a single worker. …
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Development and Evolution of ‘Ene’-Reductases for Selective Radical Chemistry
… mechanisms outside of their known roles. ‘Ene’-reductases are one such class of repurposable biocatalyst. In Nature, these enzymes use a flavin-based cofactor to afford hydrogenated analogs of activated olefins via a hydride-transfer mechanism. Using different substrates, the very same …
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Synthetic and mechanistic studies of ene reactions of carbonyl enophiles
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:56:05Z Item is restricted indefinitely.
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The Role of ORF59 and PAN ENE in Viral Replication of KSHV
… DNA synthesis to include regulation of viral gene transcription and modulation of the cellular environment to facilitate viral replication. Among the identified ORF59 binding partners are histones. Our work identified the domains of ORF59 that are required for interaction with histones and also …
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Synthesis Of 6-Nor-5,7-Seco-5-Ketal- 7,7-Diphenylcholest-7-Ene
… for the synthesis of 6,7-diazacholesta-5,7-diene (I).
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Step-growth thiol-ene photopolymerization to form degradable, cytocompatible and multi-structural hydrogels
… processes. In recent years, step-growth thiol-ene photochemistry has been utilized to form cytocompatible hydrogels for tissue engineering applications. This radical-mediated gelation scheme utilizes norbornene functionalized multi-arm poly(ethylene glycol) (PEGNB) as the macromer and di-thiol …
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Development of orthogonally crosslinked thiol-ene hydrogels for encapsulation of pancreatic beta-cells
… using a visible light-mediated interfacial thiol-ene photopolymerization. Unlike conventional chain-growth visible light polymerizations, no additional cytotoxic co-initiator or co-monomer was required in thiol-ene gelation scheme for rapid gelation. More importantly, islets coated with thiol-ene …
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Synthesis and characterisation of small molecule and macromolecular photoredox catalysts for radical thiol-ene reactions
… hydrothiolation reaction of olefins (thiol-ene reactions) to produce thioethers, which are valuable starting materials in the pharmaceutical industry, material and polymer science, and in the synthesis of various drug molecules. The isolated yields, from the reaction between thiophenol and …
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Ausgraben und Erinnern. Denkbilder des Erinnerns und der moralischen Zeugenschaft im Werk von Ene Mihkelson und Christa Wolf
… Mälutöö ja moraalse tunnistamise mõttepildid Ene Mihkelsoni ja Christa Wolfi romaanides“ mõtestab ja avab Ene Mihkelsoni ja Christa Wolfi romaanide filosoofilist potentsiaali. Eesti kirjandusuurija Jaak Tomberg on oma 2009. aastal kaitstud doktoriväitekirjas juhtinud tähelepanu kirjanduse …
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DEVELOPMENT OF METAL-CATALYZED REACTIONS OF ALLENES WITH IMINES AND THE INVESTIGATION OF BRΘNSTED ACID CATALYZED ENE REACTIONS
… have been discovering new reactions to generate interesting synthetic targets. As these new reactions have emerged, they are constantly tweaked so that an array of substrates can be synthesized and better catalysts can be discovered. The focus of our research is to two-fold: (1) to study …
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Mechanistic studies of diastereoselective cyclopropanations of homochiral ene-ketals and synthesis and resolution of diastereomeric alpha-hydroxycycloalkanone ketals.
A series of homochiral ene ketals were prepared and subjected to the Simmons-Smith cyclopropanation. A mechanistic model was formulated to explain the observed diastereoselectivity seen for the common ring systems. Diastereoselectivity is thought to result from preferential chelation of the …
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The Synthesis of (+/-)-Presilphiperfol-7(8)-Ene and Tertiary Tricyclo(5.3.1.0(4,11))undecanols Related to Presilphiperfolan-8-Ol
… reactions of the double bond of 15-nor-PSP-7(8)-ene were carried out to investigate the possible synthesis of (+/-)-PSP-8-OH from (+/-)-PSP-7(8)-ene. Epoxidation of the double bond with an aqueous buffered m-chloroperbenzoic acid furnished a 2.5:1 mixture of the 7beta,8beta- and …
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Thiol-Ene Click Chemistry for Solid State Triplet-Triplet Annihilation Upconversion and Parts-Per-Billion Pyrophosphate Sensing in Artificial Seawater
<p>Thiol-ene click chemistry is a robust approach to molecularly engineering polymers for many applications. Within this work, thiol-ene click chemistry is used to fabricate thiol-ene networks for TTA-UC and to synthesize a conjugated polyelectrolyte (CPE) used as a pyrophosphate (PPi) sensor in …
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Characterizing the deformation history of the southern Mina Deflection: field and structural studies in the Huntoon Mountains, California-Nevada
… through the MD. The HMA exposes primarily Miocene andesitic-dacitic volcanic rocks overlain by the 12.114 ± 0.006 Ma (<sup>40</sup>Ar/<sup>39</sup>Ar sanidine, Petronis et al., 2019) Tuff of Jack Spring and the 11.399 ± 0.041 Ma (<sup>40</sup>Ar/<sup>39</sup>Ar plagioclase, Nagorsen-Rinke et …
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Rearrangements and biogenetic relationships of silphinane sesquiterpenes
… of presilphiperfolanol to silphiperfol-6-ene and $\alpha$-terrecyclene formed by way of a silphinyl ion intermediate, suggests that the presilphiperfolanyl carbocation could be an important intermediate and a branch point in the biogenesis of triquinane sesquiterpenes such as …
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STRUCTURAL CHARACTERISATION OF HIGHLY BRANCHED ISOPRENOID ALKENES FROM SEDIMENTS AND ALGAE
… fourteen C25 highly branched isoprenoid (HBI) alkenes have been previously reported in estuarine and coastal sediments from locations worldwide. The parent alkane structure has been proven but only a few of the double bond positions established previously. A wide body of evidence suggests that the …
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Part One: Ozonolysis of Diphenylvinylene Carbonate. Synthesis and Thermolysis of Dibenzoyl Monoperoxycarbonate. Part Two: Singlet Oxygen: The Lifetime of Singlet Oxygen in Solution and Its Reaction With Ene-Type Olefins
The reaction of ozone and diphenylvinylene carbonate is found to give dibenzoyl monoperoxycarbonate in good yield. A mechanism for the formation of this peroxide is proposed and is consistent with the Criegee mechanism for ozonolysis of most olefins. The thermolysis of dibenzoyl monoperoxycarbonate …
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Design, Synthesis, and Characterization of Glycodendrons Through Small Molecule and Linear Polymer Models
… characterization of glycopolymer-dendron thiol-ene coupling reactions with the long-term goal of increasing biocompatibility of near infrared (NIR) fluorophores for bioimaging applications. A design of experiments was used with small molecule model compounds to determine the parameters for …
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Synthesis and use of bench-stable precatalysts with heck-type activation and progress towards the continuous-flow synthesis of atorvastatin
… a new class of bench-stable N-heterocyclic carbene nickel precatalysts for homogeneous nickel-catalysis. The nickel(II) complexes are readily activated to Ni⁰ in situ under mild conditions, via a proposed Heck-type mechanism. The precatalysts are able to facilitate carbonyl-ene, …
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