[EN] SYNTHESIS OF CYCLIC COMPOUNDS<br/>[FR] SYNTHESE DE COMPOSES CYCLIQUES
申请人:UNISEARCH LTD
公开号:WO2002000639A1
公开(公告)日:2002-01-03
A method for the preparation of a compound of formula (II) wherein R1 and R2 are independently H, alkyl, alkoxy, oxoalkyl, alkenyl, aryl or arylalkyl whether unsubstituted or substituted, optionally interrupted by one or more hetero atoms, straight chain or branched chain, hydrophilic, hydrophobic or fluorophilic; R3, R4, R5 and R6 are independently or all hydrogen or halogen; provided that at least two of the R3, R4, R5 and R6 are halogens.
An efficient synthesis of brominated 4-alkyl-2(5H)-furanones
A versatile method for the synthesis of novel brominated 4-alkyl-2(5H)-furanones under mild reaction conditions is described. This synthetic strategy requires only one chromatographic separation over six steps and employs the cyclodehydration of brominated levulinic acid as the key transformation.