Global ETD Search
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Showing 1 to 9 of 9 for “"dihydrofuran"”.
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New oxy-dihydrofuran annulation methodology
… at the r- position of 11 was addressed. A new oxydihydrofuran annulation methodology was developed following the above investigation. The addition of the lithium dienolate generated from ethyl 2-bromo-4-[(tert-butyldimethylsilyl)oxy]-butenoate 105 to aldehydes provided vinyloxiranes of type 127 as …
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Synthesis of ipomeamarone via the [2+3] dihydrofuran annulation
The synthesis of several dihydrofurans of type 179 was accomplished by the flash vacuum pyrolysis of vinyloxiranes of type 178 obtained from the addition of the dienolate of ethyl-2-bromocrotonate (177) to various aldehydes (176). Thus, dihydrofurans were prepared from aldehydes in an overall …
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Characterization of poly(dicyclopentadiene-co-dihydrofuran) polymers and composites: A frontally polymerizable and deconstructable thermoset
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Synthetic Studies towards Opaliferin, a Tetracyclic Polyketide Metabolite
… 204 and 274 were identified as key precursors. Dihydrofuran 204 was able to be accessed efficiently based on a recent established literature method, but allylation of dihydrofuran 204 proved unsuccessful. Our focus then shifted to access compound 274. Despite successfully synthesising compound …
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An Investigation of Gold(I) Catalyzed Cycloaddition Reactions
… complex at 80°C. Vinylcyclopropanes formed from dihydrofuran and dihydropyran resisted such rearrangement, even in the presence of fresh Au(I) catalyst at elevated temperature. A dual pathway is proposed for the Au(I) catalyzed reactions between propargyl esters and cyclic vinyl ethers. In …
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Mechanistic, Biochemical, and Theoretical Studies of Phototoxicity and Photobluing
… phase, we uncover significant selectivity for dihydrofuran formation over allylic hydroperoxide formation. The hydrophobic particle causes prenyl phenol to produce an <em>iso-</em>hydroperoxide intermediate with an internally protonated oxygen atom, which leads to dihydrofuran formation as well …
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Observation by flow 1H NMR and dimerization kinetics and products of reactive ortho-quinodimethanes and benzocyclobutadiene
… between o-xylylene (1) and 1,2-dimethylene-1,2-dihydrofuran (9).</p>
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Quantitative analysis and metabonomic study of phytoestrogens in Africans
… l)-4-((4-hydroxy-3-methoxyphenyl)-(methoxy)methyl)dihydrofuran-2(3H)-one, were found in pumpkin leaves for the first time. The second part of this research was based on a soy - intervention, where African subjects; 25 UK-based and 25 Nigerian - based were recruited and fed 200 mL Alpro soy-milk …
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I. Progress Toward Leiodelide A II. Palladium-Catalyzed Reactions of Enol Ethers
… ethers was discovered which produces furans and dihydrofurans. The 4-hydroxy alkyl enol ether starting materials can be easily obtained from the addition of allyl alkyl ethers to aldehydes or ketones. The developed methodology provides rapid access to easily modified furan and dihydrofurans, …