The Wittig reaction or Wittig olefination is a chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide called a Wittig reagent. Wittig reactions are most commonly used to convert aldehydes and ketones to alkenes.[1][2][3] Most often, the Wittig reaction is used to introduce a methylene group using methylenetriphenylphosphorane (Ph3P=CH2). Using this reagent, even a sterically hindered ketone such as camphor can be converted to its methylene derivative.
^Maercker, A. Org. React.1965, 14, 270–490.
^W. Carruthers, Some Modern Methods of Organic Synthesis, Cambridge University Press, Cambridge, UK, 1971, 81–90. (ISBN 0-521-31117-9)
^R. W. Hoffmann (2001). "Wittig and His Accomplishments: Still Relevant Beyond His 100th Birthday". Angewandte Chemie International Edition. 40 (8): 1411–1416. doi:10.1002/1521-3773(20010417)40:8<1411::AID-ANIE1411>3.0.CO;2-U. PMID 11317288.
The Wittigreaction or Wittig olefination is a chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide called a Wittig reagent. Wittig...
called phosphonium ylides in the Wittigreaction. He shared the Nobel Prize in Chemistry with Herbert C. Brown in 1979. Wittig was born in Berlin, Germany...
rather than the more usual Z-alkene. Wittig reagents are used for olefination reactions, i.e. the Wittigreaction. Wittig reagents are prepared by deprotonation...
are used in the Wittigreaction, a method used to convert ketones and especially aldehydes to alkenes. The positive charge in these Wittig reagents is carried...
invention of specific organic reactions such as the Grignard reaction in 1912, the Diels–Alder reaction in 1950, the Wittigreaction in 1979 and olefin metathesis...
coupling reactions. Wikimedia Commons has media related to Grignard reactions. Grignard reagent Wittigreaction Horner–Wadsworth–Emmons reaction Barbier...
including the Horner–Wadsworth–Emmons reaction. The Wittigreaction involves reaction of an aldehyde or ketone with a Wittig reagent (or phosphorane) of the...
Susan Wittig Albert (born 1940), American mystery writer Wittich Wittig River 1,2-Wittig rearrangement 2,3-Wittig rearrangement Wittigreaction Witting...
such reactions are typically identified by the eponym. Well-known examples include the Grignard reaction, the Sabatier reaction, the Wittigreaction, the...
reactions and reagents in organic chemistry include Contents: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z See also External links 1,2-Wittig...
Electrophilic addition, reaction with an electrophile gives a resonance stabilized cation With phosphonium ylides in the Wittigreaction to give the alkenes...
vacuum, one of them a Wittigreaction. The reaction goes to completion in 5 minutes with immediate evaporation whereas the same reaction in solution after...
compounds). The reaction of iminophosphoranes and organic azides in an Aza-Wittig-reaction. Condensation of carbon acids with nitroso compounds. The rearrangement...
carbon dioxide. Aldehydes participate in many reactions. From the industrial perspective, important reactions are: condensations, e.g., to prepare plasticizers...
combines these chemicals together with an ethynylation and then a Wittigreaction. Two equivalents of the proper ylide combined with the proper dialdehyde...
(C6H5)3P+-CH2R These can undergo the Wittigreaction to form α,β unsaturated ketones or aldehydes. The reagent can even undergo reaction with peroxide to form the...
homologous aldose Wittigreaction of an aldehyde with methoxymethylenetriphenylphosphine, which produces a homologous aldehyde. Arndt–Eistert reaction is a series...
using bleach with TEMPO as the catalyst. This aldehyde undergoes a Wittigreaction to for the α.β-unsaturated ester, which is converted to the lithium...
Syntheses for the Undergraduate Laboratory: Diels−Alder Cycloaddition, WittigReaction, and Williamson Ether Synthesis". Journal of Chemical Education. 87...
Knoevenagel condensation, Wittigreaction, Claisen–Schmidt condensation, Schotten–Baumann reaction, and Diels–Alder reaction. A lot of reactions derive their name...
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