High Quality Content by WIKIPEDIA articles! The Ramberg-Backlund Reaction is an organic reaction converting an -halo sulfone into an alkene in presence of a base with extrusion of sulfur dioxide. The reaction is named after the two Swedish chemists Ludwig Ramberg and Birger Backlund. The carbanion formed by deprotonation gives an unstable thiirane dioxide that decomposes with elimination of sulfur dioxide. This elimination step is considered to be a concerted cycloelimination. The overall transformation is the conversion of the carbon-sulfur bonds to a carbon-carbon double bond. The original procedure involved halogenation of a sulfide, followed by oxidation to the sulfone. Recently, the preferred method has reversed the order of the steps. After the oxidation, which is normally done with a peroxy acid, halogenation is done under basic conditions by use of CBr2F2 for the halogen transfer step. This method was used to synthesize 1,8-diphenyl-1,3,5,7-octatraene.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.