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Showing 1 to 13 of 13 for “"alkyne metathesis"”.
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Understanding reaction pathways leading to tetrahedral organic cages via alkyne metathesis
… trapped tetrahedral cages synthesized via alkyne metathesis (chapter 2), an investigation of the origin of the kinetic trap (chapter 3), and the development of strategies to probe the dependence of reaction pathways on structural variables of the precursor (chapter 4). The investigation of …
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Effects of shape, conformation, and symmetry on macrocycle synthesis via alkyne metathesis
… Dynamic covalent chemistry (DCC), specifically alkyne metathesis, was used to elucidate and probe the structural parameters that favor efficient macrocycle synthesis, because it involves rapid, reversible reactions under thermodynamic control, yielding product distributions that are determined …
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Synthetic and mechanistic studies to expand the scope of alkyne metathesis dynamic covalent chemistry
… through reversible covalent reactions. Alkyne metathesis has emerged as one of the most frequently applied reactions for the synthesis of shape-persistent molecular architectures via DCC. The scope of alkyne metathesis DCC has been rapidly expanding thanks to the development of …
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Development of a Highly Active Molybdenum Catalyst for Alkyne Metathesis and Its Application in Polymer and Macrocycle Synthesis
Made available in DSpace on 2015-09-25T22:13:29Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3199196.pdf: 5657805 bytes, checksum: c6c833dc3777c1d82e313b1d924659d5 (MD5) Previous issue date: 2005
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I. Kinetic and mechanistic studies of dynamic alkyne metathesis and II. Towards regenerative thermosets using frontal ring-opening olefin metathesis polymerization
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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In pursuit of conjugation in one-dimension: Synthetic studies of oligomeric and polymeric organic materials
Chapter 1. Ring-Opening Alkyne Metathesis Polymerization of Dibenzocyclooctynes A molybdenum(VI) propylidyne substituted with bidentate phenoxides will react with dibenzocyclooctynes in living ring-opening alkyne metathesis polymerization (ROAMP). The corresponding monodentate phenoxides do not …
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Part I. Rhodium-catalyzed asymmetric functionalization of allylic amines Part II. Harnessing kinetic driving forces in alkyne metathesis for the synthesis of complex molecular architectures
… the synthesis of a molecular Möbius strip under alkyne metathesis with kinetic diastereoselectivity. In 1858, mathematicians Möbius and Listing discovered the Möbius strip, a single-sided, unorientable surface. The intriguing Möbius topology would eventually make its way into the consciousness of …
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Cascade Transformations in Organic Synthesis: I. The Interception of Carbene Alkyne Metathesis Intermediates II. Photo-Activation of Hydrazones III. Organocatalyzed Cascade Conjugate Addition/Aldol Annulation of Organoboronates
… It includes the interceptions of carbene alkyne metathesis intermediates, boron enolate intermediates, fused cyclopropene intermediates, and boronic acid intermediates. First, the multi-alkyne carbene cascade reaction under rhodium catalysis is discussed. Ten different diazoesters were …
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Studies of Metathesis for Materials Applications: Present and Future Possibilities
… synthesis. Among such transformations, olefin metathesis (OM) occupies a position of pre-eminent significance. Alkyne metathesis holds great promise, but remains in a much lower state of development. The OM-directed work in this thesis sought to advance the state of the art in living, …
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Microporous materials fabricated from discrete molecular cages
… porous solids by preparing molecular cages via alkyne metathesis. We demonstrate that molecular pores can be rationally synthesized from tritopic organic precursors in a single step and assembled in the solid state to afford permanently porous materials. Featuring organic synthesis and modular …
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Carbon-carbon bond formation methods for the preparation of shape-persistent architectures
… and Lewis acid promoted Mo nitride-alkyne metathesis, are presented as improvements for the preparation of carbon-rich architectures. In addition, X-ray crystallographic analysis of two classes of compounds are presented. First, an analysis of carbazole-containing arylene ethynylene …
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I. Depolymerization-macrocyclization of (o-phenylene-ethynylene)-alt-(arylene-ethynylene) copolymers II. Improving existing water filtration membranes via covalent modification
… arylene-ethynylene macrocycles via alkyne metathesis remains an open area of investigation due to gaps in understanding about how monomer structure affects product distribution. In our efforts to close this gap, we studied how monomers with two different geometries would mix under …
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Z-selective olefin metathesis processes and Cis/syndioselective ROMP with high oxidation state molybdenum alkylidenes
… of this new alkylidyne complex towards terminal alkynes was investigated. Two other new tungsten alkylidynes, W(CCMe3)(pyr) 3 (pyr = 2,5-dimethylpyrrolide) and W(CCMe3)(Ph 2N)3 were prepared by the addition of three equivalents of lithium dimethylpyrrolide or lithium diphenylamide, respectively, …