Rearrangement Reaction

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Dakin Oxidation Reaction : Definition | Mechanism | Examples

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Definition : In Dakin oxidation, aromatic aldehydes or ketones undergo treatment with RCO3H or H2O2 to smoothly oxidize them into carboxylic acids. The reaction operates effectively when the aromatic aldehyde or ketone possesses electron-rich (-R, -OH, -OR, -NH2, or -NHR) substituents in the para or ortho positions. When the aromatic ring is substituted with electron-withdrawing … Read more

Pummerer Rearrangement: Mechanism, Applications Examples

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Pummerer Rearrangement

Formation of α-substituted sulfides from the corresponding sulfoxides (must have at least one hydrogen atom at their α-position) is referred to as the Pummerer rearrangement.

Aza-[2,3]-Wittig Rearrangement: Mechanism | Examples

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The rearrangements reactions are important Name reaction in organic chemistry. Wittig rearrangement, first reported by G. Wittig and L. Löhmann in 1942, The Wittig rearrangement converts α-metalated ethers to metal alkoxides, yielding secondary or tertiary alcohols. Its nitrogen analog, the aza-Wittig rearrangement, transforms α-metalated tertiary amines into rearranged metal amides, producing homoallylic secondary amines. This … Read more

Aza-Claisen Rearrangement:

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The Aza-Claisen rearrangement is a chemical reaction involving a nitrogen atom’s migration from one position to another within a molecule. It is named after the Claisen rearrangement, a well-known rearrangement reaction involving oxygen atoms. The mechanism of the aza-Claisen rearrangement: The mechanism of the aza-Claisen rearrangement involves three steps:  Protonation: The reaction often starts with … Read more