Information om | Engelska ordet BENZYNE

Exempel på hur man kan använda BENZYNE i en mening

• He worked at Michigan with Martin Stiles to observe the free benzyne in the gas phase, and then, at Yale, with a graduate student Margaret Emery and an undergraduate Jon Clardy, they found the meta and para isomers of benzyne.
• Nevertheless, benzyne is more like a strained alkyne than a diradical, as seen from the large singlet–triplet gap and alkyne-like reactivity.
• Upon treatment with strong base, chlorobenzene dehydrohalogenates to give phenol via a benzyne intermediate.
• In organic synthesis, methyl anthranilate can be used as a source of the highly reactive aryne, benzyne.
• Oxidation of this amine with lead(IV) acetate affords benzyne, which rapidly dimerises to biphenylene.
• The biphenylene structure can also be understood as a dimer of the reactive intermediate benzyne, which in fact serves as a major synthetic route, by heating the benzenediazonium-2-carboxylate zwitterion prepared from 2-aminobenzoic acid.
• 1,2,3,4-Tetraphenylnaphthalene is a polycyclic aromatic hydrocarbon commonly prepared in the undergraduate teaching laboratory as an introduction to the Diels-Alder reaction, in this case between benzyne, which acts as the dienophile, (generated in situ) and tetraphenylcyclopentadienone, which acts as the diene.
• She spent eight years at Caltech, working on 3- and 4-membered ring compounds, the reactions of alcohols with diazomethane, the hydrolysis of diaryliodonium salts, the deamination of nitrous acid, and benzyne reaction intermediates in nucleophilic aromatic substitution reactions.
• Barrett has invented many reactions including novel glycosidations, atom-economic aromatic substitution reactions, metal-catalyzed oxidations and hydroaminations, reactions using ROMP-gel supported reagents and multi-component benzyne coupling reactions.
• For example, formation of benzyne from 1 mole of 2-trimethylsilylphenyl trifluoromethanesulfonate (triflate) produces 1 mole of trimethylsilyl fluoride and 1 mole of triflate ion.
• From 1-aminotriazole, benzyne is formed in an almost quantitative yield by oxidation with lead(IV) acetate, which rapidly dimerizes to biphenylene in good yields.

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