Unified Route to the Palmarumycin and Preussomerin Natural Products. Enantioselective Synthesis of (−)-Preussomerin G
作者:Anthony G. M. Barrett、Frank Blaney、Andrew D. Campbell、Dieter Hamprecht、Thorsten Meyer、Andrew J. P. White、David Witty、David J. Williams
DOI:10.1021/jo0110247
日期:2002.5.1
inhibitor (-)-preussomerin G has been synthesized, achieving the first enantioselective route for accessing this family of natural products. Highlights of the synthetic work include an asymmetric epoxidation of a cyclic enone in excellent yield and enantiomeric excess and a potentially biomimetic oxidative spirocyclization for the introduction of the bis-spiroketal array unique to the preussomerin natural
通过鉴定出其中三种天然产物的绝对立体化学,已经实现了八烷基金霉素家族的八个成员的总合成。另外,已经合成了ras-法呢基转移酶抑制剂(-)-前体小体G,实现了获得该天然产物家族的第一对映选择性途径。合成工作的重点包括以极佳的收率和对映异构体过量进行环状烯酮的不对称环氧化,以及潜在的仿生氧化螺环化反应,以引入早螺旋体天然产物所独有的双螺酮阵列。