Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"alkylate"”.
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Polymerization of bromoundecylacrylate and alkylating methylimidazole
… a liquid polymer and can be easily used to alkylate 1-methylimidazole to produce poly(AcC11C1ImBr-co- AcC11Br). Various reaction conditions were explored to examine how extensively 1- methylimidazole can be attached to this polymer, and the extent of alkylation is determined quantitatively …
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Model Compounds for the Photoactivation of Glycosyl Donors
… generation of an oxonium intermediate that may alkylate other nucleophiles, which should be analogous to a glycosylation reaction. It was determined that a moiety with an internal sensitizer could photochemically exchange a tetrahydropyran at 300 nm. It was also determined that 6- …
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Retro-Diels-Alder routes to 4,5 disubstituted cyclopentenones
… tricyclodecadienones. Attempts to alkylate the kinetic lithium, copper and quaternary ammonium enolates generated from 5-exo-substituted tricyclodecadienones with alkylhalides were unsuccessful. Even in the presence of strong cation solvating hexamethylphosphoramide (HMPA) (±30% …
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An investigation of direct C-alkylation of 2,4-oxazolidinedione and 5-phenyl-2,4-oxazolidinedione utilizing dialkali salt intermediates
… to form the dianion of oxindole and selectively alkylate it at the 3-position without the interference of dialkylation at that position. No evidence was obtained which indicated that the dianion had been successfully formed, and the major products afforded from these attempts were the 3,3-dialkyl …
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Fluorinated amino acid derivatives
… has been developed. All attempts to alkylate the sodium salt of diethyl malonate, ethyl acetoacetate, or diethyl acetamidomalonate with 2-bromo-3-fluorobutane failed. New phosphonoacetates, tert-butyl and benzyl diethylphosphono-acetates were prepared as very versatile intermediates …
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Zeolites for Cleaner Processes: Alkylation of isobutane and n-butene
… The results of this study suggest that higher alkylate yield and longer zeolite activity are achieved by increasing the intrinsic hydride transfer rate and the ratio of isobutane to n-butene: P/ O) concentration in the vicinity of the catalyst. For a given P/O feed ratio, achieving close to …
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CONVERSION OF METHANOL AND LIGHT OLEFINS TO GASOLINE OVER A SHAPE SELECTIVE CATALYST ZSM-5
… some cracking reactions. Benzene and toluene can alkylate with methanol to form toluene and to a lesser extent the xylenes. No cracking of the benzene ring is observed at 368(DEGREES)C.
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Development of imidazotetrazines for the treatment of glioblastoma & as synthetic precursors to diazo species
… to alkyl diazoniums, used therapeutically to alkylate DNA and elicit an anticancer effect. Given their stability as prodrugs and the reactivity of the species released, imidazotetrazines were repurposed into synthetic surrogates for diazomethane and other diazoalkanes. TMZ was employed to …
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Synthesis and biological evaluation of novel MPTP analogs as potential monoamine oxidase B inhibitors
… or radical intermediates that might alkylate and inactivate the enzyme. None of the C(4)-substituted compounds displayed significant enzyme inhibitor properties while the 4-phenyl-I-propargyl analog was a good mechanism-based inactivator of MAO-B but not MAO-A. The 4-phenyl-1-propyl …
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Investigation of monolithic materials for protein sample preparation
… silica monolith has the ability to reduce and alkylate insulin in 30 min, and lysozyme in 45 min. Although this method was shown to require sample desalting to remove denaturant (urea) and the performance of the fabricated monolith had low intra-chip reproducibility, the method was simple, …
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Investigations into cyclopropanation and ethylene polymerization via salicylaldiminato copper (II) complexes
Two distinct overall research objectives are in this Master’s thesis. Very little relates the two chapters apart from the ligands. The first chapter addresses diastereoselective homogeneous copper catalyzed cyclopropanation reactions. Cyclopropanation of styrene and ethyl diazoacetate (EDA) is a …