作者:Fiona Serra、Philippe Coutrot、Mélanie Estève-Quelquejeu、Patrick Herson、Tomasz K. Olszewski、Claude Grison
DOI:10.1002/ejoc.201001740
日期:2011.4
strategy is a three-step synthesis that is based on the treatment of the β-iodo-α-keto ester with dibenzylamine. Subsequent reduction of the β-amino-α-keto ester provides the pure D-erythro, L -threo, L-erythro, and D-threo aminodiols after chromatographic purification. Further classical transformations afford the N-acetyl derivatives, which are key precursors of the lincosamine diastereomers.
报道了亚麻胺非对映异构体的四种氨基二醇前体的立体选择性合成。该程序基于 1,2;3,4-di-O-isopropylidene-α-D-galactohexodialdo-1,5-pyranose 的初始双碳延伸,然后通过亲核胺化立体控制引入氨基. 已经研究和比较了两种互补的方法:第一种是将 α-氯缩水甘油酯直接转化为 β-氨基-α-酮酯。第二种策略是基于用二苄胺处理 β-碘-α-酮酯的三步合成。β-氨基-α-酮酯的后续还原在色谱纯化后提供纯的D-赤型、L-苏型、L-赤型和D-苏型氨基二醇。进一步的经典转化提供了 N-乙酰基衍生物,