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Showing 1 to 15 of 15 for “"Maleimides"”.
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Organocatalytic conjugate addition reactions
… substituted alpha, beta-unsaturated lactones and maleimides. Chiral sulphonamide catalyst proved to be an efficient catalyst for base catalyzed conjugate addition between 2(3H)-furanones and maleimides. Aromatic furanones substrates proved to be better than alkyl furanones, giving higher yields …
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Isoxazole Linked siRNA Cholesterol Conjugates by Catalyst Free Nitrile Oxide/Alkyne Cycloadditions
… findings on the cycloaddition reactions of maleimides. Reactions with “simple” maleimides suffered from poor yield and/or poor diastereoselectivity, and synthetic access to the desired sugar maleimides was plagued by poor chemoselectivity. Following a protection/ deprotection strategy a …
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The mechanochemical modification of polyolefins using reactive modifier systems
… were evaluated one type based on N-substituted maleimides the others based on 2-allylamino-4,6-dichloro-1,3,5-triazine (ACCT). The modification of the PP was carried out in two stages. Firstly the PP was reactively processed with the modifier and a free radical initiator. The objective of this …
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Controlled release microneedle technologies for the enhanced immunogenicity of subunit vaccines
… 1-glutamate) (PPLG) polymer grafted with maleimides was used to make microneedles that function based on the same concept except that the tip's surfaces are chemically crosslinked with poly(ethylene glycol) dithiol to enable controlled release. Importantly, degradable ester bonds are …
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Novel Precursors for Polymer-Protein-Conjugate Synthesis via Reversible Addition-Fragmentation Chain Transfer Polymerization
… PNIPAAm to thiol disulfide exchange reagents and maleimides was probed for later conjugation to proteins. Evaluation of the different cross-linking systems resulted in the choice of maleimides as cross-linkers for subsequent conjugation to the protein streptavidin. Sulfhydryl-terminated …
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Cysteine arylation
… For decades, cysteine-based reactions with maleimides and alkyl halides are the primary methods for selectively tagging proteins with fluorescent dyes, affinity and radio labels, drug molecules, and polymers and nanocomposites. These traditional reactions generate sulfur-sp³ carbon bonds …
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Synthesis and characterization of novel macromolecules/networks via side chain modifications of amorphous poly(arylene ethers)
… reacted to form crosslinkable groups such as maleimides and phenylethynyl phenyl imides. These were thermally treated to induce crosslinking and formed ductile networks which had improved solvent resistance and higher glass transition temperatures. The poly(arylene ethers) containing pendant …
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Cyclopentadiene-Maleimide Platform for Thermally Reversible Polymers
… of bis-cyclopentadienes (bis-CPDs) and bis-maleimides (bis-MIs), that meets two main objectives. First, the bis-CPD must resist characteristic self-coupling. Second, the CPD-MI adducts should undergo the retro-Diels-Alder (rDA) reaction (i.e., thermal depolymerization) in a temperature …
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Cresol Novolac/Epoxy Networks: Synthesis, Properties, and Processability
… of oligomers containing thermally labile maleimides were limited to lower temperatures. However, sufficiently high molecular weight oligomers were necessary to obtain good network mechanical properties. Networks prepared from 1250 g/mol cresol novolac containing maleimide functionilities …
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Studies on pyridine nucleotide-dependent processes in Haemophilus influenzae
… by micromolar concentrations of several N-alkylmaleimides. Positive chain length effects in the inactivation by maleimides indicated the presence of a hydrophobic region close to the sulfhydryl groups being modified. The product of the reaction catalyzed by D-lactate dehydrogenase, D(-)-lactate, …
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Studies Related to the Alternating Copolymerization of Substituted Stilbenes
… polyanion based on functionalized stilbenes and maleimides have been prepared: poly(di-t-butyl-(E)-4,4′-stilbenedicarboxylate-co- N-(4-(t-butoxycarbonyl)phenyl)maleimide) and poly(N,N,Nâ ,Nâ -tetraalkyl-4,4′-di- aminostilbenes-co-N-4-(N′,N′-dimethylaminophenyl)-maleimide). These copolymer …
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Synthesis and self-assembly of multiple thermoresponsive amphiphilic block copolymers
… The copolymerization of different N-substituted maleimides with a thermosensitive styrene derivative (4-vinylbenzyl methoxytetrakis(oxyethylene) ether) led to alternating copolymers with variable LCST. Consequently, an excess of this styrene-based monomer allowed the synthesis of double …
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Segmented Aromatic Polymers Containing Thermally Reversible Linkages
… due to its relatively weak binding with maleimides at suitable propagation temperatures. Following a general review of the literature in this area (Chapter 1) the first stage of our research (Chapter 2) entails the synthesis of 2-substituted hydroquinones, which are needed as monomers in …
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Development of self-healing techniques for fiber reinforced composites
During the last decades, fiber reinforced composites (FRPs) are year by year replacing metals due to their high stiffness and high strength in combination with low specific weight and corrosion resistance. However, during their service life, these composites due to their laminated structure (no …