• An ylide (/ˈɪlaɪd/) or ylid (/ˈɪlɪd/) is a neutral dipolar molecule containing a formally negatively charged atom (usually a carbanion) directly attached...
    10 KB (1,152 words) - 15:53, 3 June 2024
  • chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide called a Wittig reagent. Wittig reactions are most commonly used to convert...
    15 KB (1,600 words) - 17:50, 27 May 2024
  • Thumbnail for Nitrile ylide
    Nitrile ylides also known as nitrilium ylides or nitrilium methylides, are generally reactive intermediates formally consisting of a carbanion of an alkyl...
    3 KB (389 words) - 15:25, 18 November 2023
  • Thumbnail for Azomethine ylide
    Azomethine ylides are nitrogen-based 1,3-dipoles, consisting of an iminium ion next to a carbanion. They are used in 1,3-dipolar cycloaddition reactions...
    18 KB (1,988 words) - 01:46, 19 April 2024
  • dipole or a nucleophilic dipole, which includes azomethine ylide, carbonyl ylide, nitrile ylide, azomethine imine, carbonyl imine and diazoalkane. These...
    65 KB (6,396 words) - 21:04, 1 August 2024
  • Thumbnail for Johnson–Corey–Chaykovsky reaction
    Corey and Michael Chaykovsky. The reaction involves addition of a sulfur ylide to a ketone, aldehyde, imine, or enone to produce the corresponding 3-membered...
    22 KB (2,314 words) - 20:36, 31 July 2024
  • Thumbnail for Dicarbon monoxide
    15596-07-3) contains the C2O functionality. Sometimes called Bestmann's Ylide, it is a yellow solid. Frenking, Gernot; Tonner, Ralf "Divalent carbon(0)...
    4 KB (313 words) - 00:53, 27 August 2023
  • Thumbnail for Thiamine pyrophosphate
    charges on adjacent atoms is called an ylide, so sometimes the carbanion form of TPP is referred to as the "ylide form". In several reactions, including...
    9 KB (868 words) - 17:30, 18 July 2024
  • Thumbnail for Peterson olefination
    The Peterson olefination (also called the Peterson reaction) is the chemical reaction of α-silyl carbanions (1 in diagram below) with ketones (or aldehydes)...
    7 KB (727 words) - 03:28, 9 March 2024
  • Thumbnail for 1,3-dipole
    analogous to nitrile oxide) Carbonyl imines Some ylides Azomethine ylide Nitrile ylide (RCNCR'2) Carbonyl ylide Thiosulfines (R2CSS) Francis A. Carey, Richard...
    3 KB (228 words) - 16:45, 1 November 2023