ylides


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yl·ides

(il'idz),
A class of compounds in which a positively charged negative element from group V or VI of the periodic table (for example, N, O, S, P) is bonded to a carbon atom having an unshared pair of electrons; ylides have been observed in a number of enzyme-catalyzed reactions.
References in periodicals archive ?
Pyrrolo-[1, 2-a] imidazoles have been synthesized by diastereoselective of 1,3dipolar cycloaddition by using 4, 5-dihydroimidazolium ylides with an alkylating agent and base or more recently carbenoid insertion to dihydroimidazoles.
Azomethine ylides have been used as 1, 3dipoles in cycloaddition reactions for the formation of five-membered rings containing nitrogen atom in the ring focused to substantial attention.
Maghsoodlou et al., "Theoretical study, an efficient synthesis route to, and kinetic investigation of, stable phosphorus ylides derived from benzamide," Progress in Reaction Kinetics and Mechanism, vol.
Milani, "Synthesis of stable phosphorus ylides from 6-chloro-2-benzoxazolinone and kinetic investigation of the reactions by uv spectrophotometry," Progress in Reaction Kinetics and Mechanism, vol.
[section]ahin, "Polysubstituted fused ring bicyclic thiohydantoins from aminocarbo-N-thioylpyrrolidines derived from azomethine ylide 1,3-dipolar cycloadditions," Heterocycles, vol.
Karimi, "A facile synthesis of stable phosphorus ylides derived from 3,6-dibromocarbazole and kinetic investigation of the reactions by UV spectrophotometry technique," Heteroatom Chemistry, vol.
Shahraki, "[sup.1]H NMR technique for kinetic investigation of equilibrium between the Z- and E-isomers in a stable phosphorus ylide involving a 2-indolinone," Progress in Reaction Kinetics and Mechanism, vol.
Intrinsic basicities of phosphorus imines and ylides: a theoretical study.
Free and supported phosphorus ylides as strong neutral Bronsted bases.
In one experiment, described in volume 124, issue 22 (2002) of the Journal of the American Chemical Society, he and his colleagues generated compounds known as phosphorus ylides (or phosphoranes) without solvents, the first time such a feat had been reported.
Mechanically induced solid-state generation of phosphorus ylides and the solvent-free Wittig reaction.
Ohkubo, Dess-Martin Periodinane Oxidation of Alcohols in the Presence of Stabilized Phosphorus Ylides:A Convenient Method for the Homologation of Alcohols via Unstable Aldehydes, J.