Anagram & Information om | Engelska ordet YLIDES

Exempel på hur man kan använda YLIDES i en mening

• The actual bonding picture of these types of ylides is strictly zwitterionic (the structure on the right) with the strong Coulombic attraction between the "onium" atom and the adjacent carbon accounting for the reduced bond length.
• Mechanistic studies have focused on unstabilized ylides, because the intermediates can be followed by NMR spectroscopy.
• The dithiophosphine ylides are normally attacked at the phosphorus atom by a nucleophile, for instance the reaction of an alkoxide, phenolate, alcohol or phenol with a 1,3,2,4-dithiadiphosphetane 2,4-disulfide can form a new compound with a phosphorus-oxygen bond.
• The Prato reaction is a particular example of the well-known 1,3-dipolar cycloaddition of azomethine ylides to olefins.
• In contrast to phosphonium ylides used in the Wittig reaction, phosphonate-stabilized carbanions are more nucleophilic but less basic.
• These nitrile ylides are dipolar compounds and can be trapped by a variety of dipolarophiles to yield heterocyclic compounds, e.
• Arsine ylides are generally less stable than phosphine ylides, decomposing spontaneously in the absence of a vicinal carbonyl.
• Also known are protocols for cycloadditions such as Diels-Alder reactions, 1,3-dipolar cycloadditions of azomethine ylides and azide–alkyne cycloaddition reactions.
• As a graduate student in the Burgess group, his research involved organo-main group element chemistry, specifically, thiocarbonyl ylides, and low-coordinate hypervalent sulfur compounds.
• Nitrile ylides also known as nitrilium ylides or nitrilium methylides, are generally reactive intermediates formally consisting of a carbanion of an alkyl or similar group bonded to the nitrogen atom of a cyanide unit.
• Phenol oxidation with hypervalent iodine reagents leads to the formation of quinone-type products or iodonium ylides,.
• A major feature about stabilized ketene is that it can be prepared from carbon monoxide (CO) reacting with main-group starting materials such as ylides, silylene, and phosphinidene to synthesize and isolate for further steps.

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