Difructose dianhydrides as synthetic intermediates. A synthesis of 3,6-anhydro--D-fructose
作者:Jacques Defaye、José M. Garcia Fernández
DOI:10.1016/s0957-4166(00)86300-4
日期:1994.11
A preparation of 3,6-anhydro-keto-D-fructose from α-D-fructofuranose β-D-fructofuranose 1,2′:2,1′-dianhydride is reported. The synthetic scheme involves selective halogenation of the primary hydroxyl groups and intramolecular nucleophilic displacement of the later by OH-3,3′. A significant difference towards formation of the 3,6-anhydro bridge between the α- and β-D-fructofuranosyl subunits has been
据报道,由α-D-果糖呋喃糖β-D-果糖呋喃糖1,2':2,1'-二酐制备3,6-脱水-酮-D-果糖。合成方案包括伯羟基的选择性卤化和后一个分子被OH-3,3'的分子内亲核取代。已经观察到在α-和β-D-果糖呋喃糖基亚基之间形成3,6-脱水桥的显着差异,并且归因于构象特征。还已经制备了α-D-果呋喃糖β-D-果糖吡喃糖1,2':2,1'-二酐的相应的3,6-脱水衍生物。在3,6-脱水-β-D-果糖呋喃糖3,6-脱水-β-D-果糖呋喃糖1,2,:2,1'-二酐中二螺酮的轻度酸水解产生目标α-羟基酮。