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Showing 1 to 8 of 8 for “"Michael Addition Reactions"”.
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The Use of Ipso-dihydrodiols Enzymatically Derived from Benzoic Acid in Enantioselective Synthesis. Appoaches to Total Synthesis of Vinca Alkaloids
… into Diels-Alder, radical cascade, and tandem Michael addition reactions as possible routes to the family of alkaloids. Also described are the chemoenzymatic syntheses of the natural product (-)-idesolide and unnatural polyhydroxylated pyrrolidines generated from the biotransformation of …
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Reductive Dehalogenation by Aqueous Biochars
… the degradation of toxic compounds. In the reactions with pollutants, sorption by bulk BC particles can inhibit their availability and slow down the degradation. Alternatively, BC mobilized to the aqueous phase, termed aqueous BCs (a�"BCs), can potentially promote the degradation of target …
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The acid-catalyzed self-condensation reaction of b-diketones in the presence of 2,2,2-trifluorodiazoethane
… from 6-dicarbonyl units. Acid-catalyzed reactions of 1-phenyl-1,3-butanedione and several substituted derivatives of 1- phenyl-1,3-butanedione with TFD afforded two groups of substituted biphenyl compounds. One of these groups could be an important synthon for the preparation of larger …
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Synthesis and Non-Covalent Interactions of Novel Phosphonium-Containing Polymers
… endcapping reagents for melt polyester reactions afforded a thermally stable ionic functionality that controlled molecular weight. Weak association was present with phosphonium ions at low ion concentrations below 7.7 mole %. The use of novel ionic bisacetoacetate monomers in the …
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Biomedical Applications of Thiol-Acrylate Polymers
… of biocompatible polymers using thiol-acrylate Michael addition reactions between not only acrylates and thiols but also between amines and acrylates were demonstrated. The synthesis of an in situ tertiary amine catalyst initiates the propagation steps of the polymerization process by …
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Block and Graft Copolymers Containing Carboxylate or Phosphonate Anions
… monomers were synthesized based on aza-Michael addition reactions. Free radical copolymerizations of these monomers with an acrylate-functional poly(ethylene oxide) (PEO) macromonomer produced graft copolymers. Quantitative deprotection of the alkylphosphonate groups afforded graft …
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Facile protein and amino acid substitution reactions and their characterization using thermal, mechanical and optical techniques
… to quantify protein and amino acid substitution reactions. Michael addition reactions were used to modify the amino acids and protein. Amino acids alanine, cysteine, and lysine, and protein ovalbumin (OA) were substituted with different concentrations of ethyl vinyl sulfone (EVS). The substituted …
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Ion-pair based Molecular Imprinted Polymers for bioanalysis and sustainable use of organocatalysts
… thiourea organo-catalysts from common catalytic reactions, such as the Baylis-Hillman, Diels-Alder, Strecker and Michael addition reactions, is presented. In all cases, catalyst recoveries of up to 100% in very high purity were achieved, an achievement not matched by the commercially available …