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Showing 1 to 5 of 5 for “"[2+2+2] Cycloaddition"”.
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Development of Nickel and Zirconium Mediated Cycloadditions for the Synthesis of Substituted Pentacene
The regioselectivity of the [2+2+2] cycloaddition of nickel-benzynes and 1,3-diynes could be maintained when asymmetrically substituted 1,3-diynes were employed. The ability to incorporate an asymmetric 1,3-diyne into the oligoacene backbone provided substituents that could be differentiated in …
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Synthesis of pyridines via [4 + 2] cycloadditions of vinylallenes with azadienophiles
… substituted pyridines that involve [4 + 2] cycloadditions of vinylallenes with azadienophiles. Part II of this thesis describes a unimolecular, formal [2 + 2 + 2] cycloaddition strategy for the synthesis of tricyclic pyridines based on intramolecular propargylic ene/imino Diels-Alder …
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Pericyclic reactions in organic synthesis
… describes a formal, metal-free, [2 + 2 + 2] cycloaddition strategy based on a cascade of two pericyclic processes. An intramolecular propargylic ene reaction of a 1,6-diyne is used to generate a vinylallene, which then reacts in an inter- or intramolecular Diels-Alder reaction with an alkenyl …
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Design and synthesis of components for optically active metal-organic frameworks (MOFs) and synthetic routes to diverse deuterium labelled α-diazoacetates, α-diazoacetamides, α-diazoketones, and the antibiotic azaserine
… developed and a reliable protocol for a [2+2+2] cycloaddition reaction of 1,6-diyne with acetylene was established. The 2,2'-bipyridine moiety was successfully installed in the axially chiral (S)-BINOL-based linker providing a highly effective chelating ligand. α-Diazocarbonyl compounds are …