Toward the Total Synthesis of Hygrocin B and Divergolide C: Construction of the Naphthoquinone–Azepinone Core
作者:Christopher C. Nawrat、Russell R. A. Kitson、Christopher J. Moody
DOI:10.1021/ol5003847
日期:2014.4.4
A highly regioselective Diels–Alder approach toward the bioactive natural products hygrocin B and divergolide C is presented. The route uses an unusual benzoquinone–azepinone dienophile prepared in 8 steps from ethyl 8-methoxy-1-naphthoate, by a route which includes, as key steps, a Birch alkylation and a Beckmann rearrangement of a tetralone oxime, both of which are demonstrated on multigram scale
提出了一种对生物活性天然产物潮霉素B和曲格列奈德C具有高度区域选择性的Diels-Alder方法。该路线使用由八甲氧基-1-萘甲酸乙酯分8步制备的不寻常的苯醌-one庚酮二烯亲和体,该路线包括作为关键步骤的四氢萘酮肟的Birch烷基化和Beckmann重排,这两种方法均得到了证明。以毫克为单位。萘醌-a庚酮核心经过适当功能化,可添加天然产物中的ansa链。