作者:Sven Hainke、Sebastian Arndt、Oliver Seitz
DOI:10.1039/b509846g
日期:——
A fast and simplified synthesis of 1â²,2â²-dideoxy-1â²-pyrenyl-riboside and several other C-nucleosides is shown. Shelf-stable 1-O-methyl-3,5-di-O-toluoyl-2-deoxyribose is demonstrated to serve as a versatile glycosyl donor in Lewis acid promoted FriedelâCrafts alkylations of unsubstituted pyrene and other inexpensive arenes such as fluorene and methylnaphthalene. The reaction conditions favour the formation of β-configurated C-nucleosides which renders additional epimerisation steps unnecessary. As a result, protected β-aryl-C-nucleosides are available directly from non-substituted arenes in three steps overall.
展示了一种快速简化的1′,2′-二脱氧-1′-芘基核苷和几种其他C-核苷的合成方法。实验证明,货架稳定的1-O-甲基-3,5-二-O-甲苯酰-2-脱氧核糖可以作为在路易斯酸促进下未取代芘和其他廉价芳烃(如芴和甲基萘)的傅-克烷基化反应中的多功能糖基供体。反应条件有利于形成β构型的C-核苷,从而不需要额外的差向异构化步骤。因此,保护的β-芳基C-核苷可以从非取代的芳烃在总共三步反应中直接获得。