- Une synthese hautement stereoselective de dienes conjugues (E)
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A general method for the preparation of (E) terminal conjugated dienes was developed by the flash thermolysis of 2-substituted 2,5-dihydrothiophene-1,1-dioxides generated by a retro Diels-Alder reaction.This process allows the obtention of conjugated dienes, bearing or not a functionality (alcohols, esters), with an excellent stereoisomeric purity (in general higher than 98percent).An application to the synthesis of (E)-9,11-dodecadien-1-yl acetate, the major component of the sex pheromone of Diparopsis castanea, shows the generality and the efficacy of this method.
- Bloch, R.,Abecassis, J.,Hassan, D.
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p. 2019 - 2024
(2007/10/02)
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- THE STEREOSELECTIVE SYNTHESIS OF FUNCTIONALIZED CONJUGATED DIENES: PREPARATION OF (E,E)-α-HYDROXY DIENES AND OF VINYLALLENES.
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A simple procedure has been developped for the synthesis of (E,E)-α-hydroxy conjugated dienes of high stereoismoeric purity.A stereoselective preparation of vinylllenes by thermal extrusion of SO2 from 2- alkylidene-2,5-dihydrothiophene-1,1-dioxides is de
- Bloch, R.,Hassan, D.,Mandard, X.
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p. 4691 - 4694
(2007/10/02)
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