作者:Anastasia Hager、Christian A. Kuttruff、Elena Herrero-Gómez、Dirk Trauner
DOI:10.1016/j.tetlet.2013.10.104
日期:2014.1
Ansalactam A is a recently isolated ansa macrolide containing a spiro-γ-lactam functionality that is structurally distinct from other members of the ansa macrolide family. Herein, we describe synthetic studies toward ansalactam A. A route has been developed for the synthesis of a model system featuring a xanthate, which constitutes a direct precursor for the projected radical cyclization step aimed
Ansalactam A是最近分离出的ansa大环内酯,包含螺-γ-内酰胺官能团,该结构与ansa大环内酯家族的其他成员结构不同。在本文中,我们描述了对Analactam A的合成研究。已开发出一种途径,用于合成以黄药为特征的模型系统,它构成了预期的自由基环化步骤的直接前体,该步骤旨在形成环磷酰胺的螺-γ-内酰胺部分。在这种情况下,开发了一种新的实用方法,用于去除附着在空间受限基质上的Evans助剂。描述了利用β-内酯作为酰化试剂,作为常用酰胺偶联反应的替代方法。