Global ETD Search
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Showing 1 to 9 of 9 for “"thiazolium"”.
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Design and Synthesis of Chiral Triazolium and Thiazolium Salts Incorporating Hydrogen-Bonding Motifs as Organocatalysts
… proposed. Synthetic routes to new triazolium and thiazolium salt catalysts with unreported chiral backbones are discussed. These involve 1,2-diamine derived salts, 1,4-diamine derived salts, amino acid-derived triazolium salts, and a bicyclic triazolium salt with a piperidine backbone. …
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Towards incorporation of catalytic function into small folded peptide scaffolds
… acid can be alkylated to generate the active thiazolium species. A series of designed peptides containing the Taz coenzyme chimera revealed that an increasingly structured and hydrophobic peptidyl environment can dramatically enhance the acidity of the thiazolium C2 methine, the initial step …
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Design and Synthesis of Thiamine Pyrophosphate (TPP) Analogues for Investigating the Structure-Activity Relationship (SAR) of Inhibitors of TPP-dependent Enzymes
… neutral aromatic ring in place of TPP’s positive thiazolium ring. In response to the growing demand in understanding the roles of TPP-dependent enzymes and their pathways within biological systems, development of membrane-permeable thiamine analogues is pursued. In this PhD project, novel …
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Poly(ionic liquid) stabilizers and new synthetic approaches
… composed of PIL and cellulose nanofibers (CNFs), thiazolium-containing PILs, and main-chain imidazolium-type PILs. In the first chapter, a vinylimidazolium-type IL was polymerized in water in the presence of CNFs resulting in the in situ electrostatic grafting of polymeric chains onto the surface …
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Investigation of Factors Influencing Recombination Versus Disproportionation of Complex Radicals Formed by C-N Homolysis of Breslow Type Intermediates and Related Compounds
… Breslow intermediates formed by deprotonation of thiazolium salts and reaction with aromatic aldehydes are examples of electron rich enamines. These breslow intermediates can undergo C-N bond homolysis to form a radical pair the either recombine or disproportionate. Upon investigation of the …
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Ligand reactivities in platinum and palladium chalcogen complexes
… also be included. A series of imidazolium and thiazolium ligands have been successfully anchored on the core with further hetero-alkylation using Me2SO4. The dialkylated complexes were mixed with Pd(OAc)2 for Suzuki-Miyaura cross-coupling reactions, giving promising yields. It was also proved …
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Three-Way Chemoselectivity Switching through Coupled Equilibria in Complex System and Post-synthetic Modification of Cyclobenzoins
… the addition time of the oxidant. Chapter Three, thiazolium salt as an alternative catalyst was used to synthesis cyclobenzoin. The intrinsic pore of cyclobenzoin has been expanded by using various types of dialdehyde, which increase the size of the central core of cyclobenzoin. Chapter Four, the …
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Catalytic biomass conversion and upgrading into platform chemicals and liquid fuels
… (PIL)-supported metal (Cr, Al) catalysts, and thiazolium chloride, a recyclable Vitamine B1 analog. An integrated, semi-continuous process for the HMF production from fructose has also been developed, affording the high-purity HMF as needle crystals. Towards HMF upgrading into …