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 6 of 6 for “"diazoketone"”.
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Construction of carbocycles via oxonium ylides generation and rearrangement: towards the synthesis of taxol
… Following the success of our methodology, a key diazoketone intermediate was chosen to establish the viability of our strategy, before embarking on the total synthesis of Taxol. The efficient synthesis of the required diazoketone is discussed in detail, after the exploration of many different …
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[4+1] cyclopentene annulation in the total synthesis of pentalenene type sesquiterpenes
… preparation of acid 161, its conversion to diazoketone 148, intramolecular cyclopropanation of this substance to vinylcyclopropane 163 and the vinylcyclopropane-cyclo pentene rearrangement of several derivatives of 195 to triquinanes 147, 146, 197, and 204. A detailed study of temperature, …
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Formation of 2,5-trans-tetrahydrofuran-3-one application towards the synthesis of natural products
… insertion and ylide rearrangement reaction of a diazoketone. This diazoketone undergoes a nucleophilic attack onto an empty d orbital of the transition metal. The transition metal back donates the electrons of one of its d orbital to the carbon to form the metal carbenoid with elimination of …
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Internal surface coating and photochemical modification of polypropylene microfiltration membrane
… disulfonylchloride containing a photoactive diazoketone (DK) group on the side chain and 1,8-octanediamine is studied. Various fabricatIon conditions including concentration of monomers, organic solvent selection, crosslinking agent, selection of an acid acceptor and reaction time were …
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Intramolecular carbenoid insertion : reactions of [alpha] -diazoketones derived from benzothienyl, pyrolyl and indolyl alkanoic acids with rhodium (II) acetate
… acetate decomposition chemistry observed for a-diazoketones tethered to thienyl, furanyl, and benzofuranyl moieties is dependent not only on the nature of the heteroatom but also on the length of the aliphatic tether linking the diazoketone moiety with the aromatic fragment. The present thesis …
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I. Facile preparation of ortho-fluorophenols from non-aromatic precursors and investigation of applications to fluorine-18 labeling II. Resin-supported silyl ester precursors for kit-like radiolabeling with fluorine-18
Molecular imaging is a technique that can be used to visualize complex biochemical processes without perturbing living organisms, and it has been playing increasingly important roles for the early detection of disease states and monitoring the results of therapies. Among molecular imaging …