作者:Robert K. Boeckman,、Tammy J. Clark、Brian C. Shook
DOI:10.1021/ol026101e
日期:2002.6.1
see text] A practical total synthesis of Bengamides B, E, and Z from a common polyol intermediate is described. Consecutive aldol condensations afford a protected polyol thioester side chain suitable for coupling to the Bengamides. A novel chiral phase transfer catalyzed enantioselective alkylation affords the more highly functionalized amino caprolactams required for Bengamides B and Z. Use of the 2-naphthylmethyl
[反应:见正文]描述了由普通的多元醇中间体实际合成全酰胺B,E和Z。连续的醛醇缩合提供适合于与双酰胺偶联的保护的多元醇硫酯侧链。新型手性相转移催化的对映选择性烷基化反应提供了Bengamides B和Z所需的功能更高的氨基己内酰胺。使用2-萘甲基甲醚保护基与对映选择性羟醛缩合所需的硼Lewis酸相容,可直接获得Bengamide B 。