Study of the Endocyclic versus Exocyclic C–O Bond Cleavage Pathways of α- and β-Methyl Furanosides
作者:Olivier St-Jean、Michel Prévost、Yvan Guindon
DOI:10.1021/jo3027438
日期:2013.4.5
scaffolds (ribo, lyxo, arabino, and xylo) efficiently afforded acyclic thioacetals with high SN2-like selectivity at the acetal center in the presence of Me2BBr and thiophenol. The stereochemical outcome of these reactions provides important mechanistic insights into the activation pathway of five-membered semicyclic acetals. The thioacetal products should find applications in oligosaccharides synthesis and
激活和在四个天然糖支架甲基呋喃糖苷(核糖,来苏,阿拉伯糖,和木糖)的开环有效地得到无环硫缩醛具有高S Ñ在我的存在下,乙缩醛中心2等选择性2的BBr和苯硫酚。这些反应的立体化学结果为五元半环缩醛的活化途径提供了重要的机理见解。硫缩醛产品应在寡糖合成中找到应用,并允许进一步开发用于合成新型核苷类似物的无环策略。