Exploring the Chemistry of Epoxy Amides for the Synthesis of the 2′′-<i>epi</i>-Diazepanone Core of Liposidomycins and Caprazamycins
作者:Francisco Sarabia、Carlos Vivar-García、Cristina García-Ruiz、Laura Martín-Ortiz、Antonio Romero-Carrasco
DOI:10.1021/jo202061t
日期:2012.2.3
reaction of uridyl aldehyde 19 with an amide-stabilized sulfur ylide. Two different strategies were shown to be efficient in constructing the diazepanone ring system: (a) a reductive amination of an epoxy aldehyde with N-methylamine with subsequent intramolecular oxirane ring opening and (b) a carbene insertion reaction of an acyclic diazoamine precursor.
已探索出新的合成策略,用于合成脂环霉素和卡普拉霉素的结构核心,这是一类令人着迷的复杂核苷型抗生素。该结构核心由与尿嘧啶片段连接的环状二氮杂酮系统组成。各种合成方法的共同点是它们源自尿苷衍生的环氧酰胺,其是通过尿苷醛19与酰胺稳定的硫内酯反应而获得的。已显示出两种不同的策略可有效地构建二氮杂潘酮环系统:(a)用N-甲胺对环氧醛进行还原胺化,随后进行分子内环氧乙烷环的开环;(b)无环重氮胺前体的卡宾插入反应。