Ramberg–Bäcklund reaction

Ramberg–Bäcklund reaction
Named after Ludwig Ramberg
Birger Bäcklund
Reaction type Rearrangement reaction
Identifiers
Organic Chemistry Portal ramberg-baecklund-reaction
RSC ontology ID RXNO:0000094

The Ramberg–Bäcklund reaction is an organic reaction converting an α-halo sulfone into an alkene in presence of a base with extrusion of sulfur dioxide.[1] The reaction is named after the two Swedish chemists Ludwig Ramberg and Birger Bäcklund. The carbanion formed by deprotonation gives an unstable episulfone that decomposes with elimination of sulfur dioxide. This elimination step is considered to be a concerted cheletropic extrusion.

The overall transformation is the conversion of the carbon–sulfur bonds to a carbon–carbon double bond.

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