Syntheses of Mono- and Divalent C-Aminoglycosides Using 1,2-Oxazine Chemistry and Olefin Metathesis
作者:Hans-Ulrich Reissig、Maja Kandziora、Eike Mucha、Sina Zucker
DOI:10.1055/s-0034-1379503
日期:——
An approach to mono- and divalent C -aminoglycosides starting from a new enantiopure 1,2-oxazine derivative is described. The introduction of a vinyl group into the 1,3-dioxolanyl substituent of a 1,2-oxazine allowed the Lewis acid promoted preparation of a vinyl-substituted bicyclic 1,2-oxazinone. After reduction of the carbonyl group, exhaustive hydrogenolysis provided branched C -aminoglycosides
描述了一种从新的对映体纯 1,2-恶嗪衍生物开始制备单价和二价 C-氨基糖苷的方法。将乙烯基引入 1,2-恶嗪的 1,3-二氧戊环取代基允许路易斯酸促进乙烯基取代的双环 1,2-恶嗪酮的制备。羰基还原后,彻底氢解提供具有 β-d-塔糖或 β-d-艾杜糖构型的支链 C-氨基糖苷。受保护的重排产物8的乙烯基还允许与Grubbs II催化剂进行自复分解,提供作为E/Z混合物的“二聚”化合物。其氢解以良好的总收率提供了二价C-氨基糖苷。