Synthesis of a New Type of Glycosidic Linkage: Acetal-Linked Disaccharides and Trisaccharides of Acyclic and Cyclic Sugars
作者:Soni Kamlesh Madhusudan、Anup Kumar Misra
DOI:10.1002/ejoc.200500081
日期:2005.8
New types of di- and trisaccharides related to a unique trisaccharide present in the cell walls of Proteus have been synthesized by coupling of acyclic sugar dithioacetals and di- and monohydroxy cyclic sugars. In this class of compounds an acyclic sugar is linked to a cyclic sugar through an acetal linkage. The formation of these acetal-linked pseudodi- and-trisaccharides has been achieved by a generalized
与变形杆菌细胞壁中存在的独特三糖相关的新型二糖和三糖已通过无环糖二硫缩醛与二羟基和单羟基环糖的偶联合成。在这类化合物中,无环糖通过缩醛键与环状糖相连。这些缩醛连接的假二糖和三糖的形成是通过在温和、无金属和中性条件下由 1,3-二溴-5,5-二甲基乙内酰脲介导的一般反应程序实现的。已经合成了与变形杆菌细胞壁中发现的三糖相关的 16 种受保护和 12 种脱保护的二糖和三糖。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)