Examples of 'ylides' in a sentence
Meaning of "ylides"
ylides (noun) - Ylides are a class of organic compounds that have a positively charged atom directly attached to a negatively charged atom, creating a molecule with both ionic and covalent bonding properties
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- plural of ylide
How to use "ylides" in a sentence
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ylides
These ylides are sufficiently stable to be sold commercially.
Subsequent reactions of those ylides are described.
Azomethine ylides can also be formed directly by deprotonation of iminiums.
The invention also relates to new phosphorus ylides and their preparation.
Azomethine ylides can be generated from ring opening of aziridines.
The mixture gradually developed the dark yellow coloration characteristic of ylides.
The addition of the ylides of carbonyl leads to the formation of dihydrofurans.
Wittig reactions are most commonly used to couple aldehydes and ketones to singly-substituted triphenylphosphonium ylides.
Ylides for this reaction may be formed from phosphoranes or phosphonates.
Another way to form azomethine ylides from imines is by prototropy and by alkylation.
Ylides of structures III, Va and Vb are known in the art.
The formation of pyridinium ylides from carbenes and pyridine is also studied.
In the Johnson - Corey - Chaykovsky reaction epoxides are generated from carbonyl groups and sulfonium ylides.
Sulfur ylides such as dimethylsulfonium methylide are prepared by conventional methods known per se.
The present invention relates to the use of phosphorus ylides as slightly nucleophilic strong bases.
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The resulting carbonyl ylides have been trapped with the dipolarophiles, acrylonitrile, maleonitrile, and fumaronitrile.
The triazole 5 does not react with nitrile ylides 2.
The cycloaddition with azomethine ylides is described in Doepp et al, Chem.
Azomethine ylides can be generated from many sources, including aziridines, imines, and iminiums.
No or almost no A-2 compounds may be formed if stabilized ylides are used.
Conjugated azomethine ylides are capable of - and - electrocyclizations.
Photolysis of azirines ( under 300 nm ) is a very efficient way to generate nitrile ylides.
These ylides can be trapped with a suitable dipolarophile in a 1,3-dipolar cycloaddition.
From 1-aminopyridinium salts the photochemically active 1-N-iminopyridinium ylides are accessible by acylation.
Azomethine ylides are nitrogen-based 1,3-dipoles, consisting of an iminium ion next to a carbanion.
The major pathway involves 1,3-dipolar cycloreversion to N2 and the corresponding carbonyl ylides.
Nitrenes, Diradicals, and Ylides.
