[EN] PROCESS OF PREPARATION OF L-IDURONIC ACID AND DERIVATIVES COMPRISING A DECARBOXYLATION/INTRAMOLECULAR CYCLISATION TANDEM REACTION<br/>[FR] PROCÉDÉ DE PRÉPARATION D'ACIDE L-IDURONIQUE ET DE SES DÉRIVÉS COMPRENANT UNE RÉACTION TANDEM DE DÉCARBOXYLATION/CYCLISATION INTRAMOLÉCULAIRE
申请人:SANOFI SA
公开号:WO2013050497A1
公开(公告)日:2013-04-11
The present invention relates to a process of preparation of L-iduronic acid and derivatives comprising a decarboxylation/intramolecular cyclisation tandem reaction. The present invention also relates to the intermediates of the process, as well as their use as intermediates in the preparation of Idraparinux.
Process of preparation of L-iduronic acid comprising a decarboxylation/intramolecular cyclisation tandem reaction
申请人:SANOFI
公开号:EP2578594A1
公开(公告)日:2013-04-10
The present invention relates to a process of preparation of L-iduronic acid and derivatives comprising a decarboxylation/intramolecular cyclisation tandem reaction. The present invention also relates to the intermediates of the process, as well as their use as intermediates in the preparation of Idraparinux.
pentasaccharides was accomplished by formal inversion of configuration at C-5 of a D-glucuronic acid derivative through radical formation at C-5 using Barton decarboxylation followed by intramolecular radical addition on an acetylenic tether at O-4 giving exclusively a bicyclic sugar of L-ido configuration. Oxidation and ring opening of this bicyclic sugar led to a L-iduronate. This method opens the