The Wittig Reaction allows the preparation of an alkene by the reaction of an aldehyde or ketone with the ylide generated from a phosphonium salt.

These conditions are compatible with the presence of aldehydes or ketones and therefore can be conducted in a one-pot manner.

Strong evidence indicated that under Li-free conditions, Wittig reactions involving unstabilized (R1= alkyl, H), semistabilized (R1 = aryl), and stabilized (R1 ...

22 янв. 2023 г. · Organophosphorus ylides react with aldehydes or ketones to give substituted alkenes in a transformation called the Wittig reaction.

6 февр. 2018 г. · The Wittig Reaction converts aldehydes and ketones into alkenes through reaction with a phosphorus ylide. Mechanism and examples below.

22 янв. 2023 г. · Evidence suggests that the Wittig reaction of unbranched aldehydes under lithium-salt-free conditions do not equilibrate and are therefore under ...

Under salt-free, aprotic conditions, ylides Ph3P=CHR (R=alkyl, alkenyl, phenyl) react with aldehydes to produce the oxaphosphetane directly via four-centered ...

The Wittig reaction is the chemical reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (the Wittig reagent) to afford an alkene and ...

Wittig reactions are more general in that the product carbonyl does not need to have an attached carbonyl.

The Wittig reaction is stereoselective: with nonstabilized ylides, the reaction is (Z)-selective, whereas with stabilized ylides, the reaction is (E)-selective.