The preparation of 9-substituted Δ5-octenolides: Synthesis of 8-deoxy-pseudo-ascidiatrienolide C
作者:Grant A. McNaughton-Smith、Richard J.K. Taylor
DOI:10.1016/0040-4020(95)01028-9
日期:1996.2
Two routes have been explored for the preparation of the title 9 membered lactones. Lactonisation of a hydroxy acid bearing an embryonic unsaturated side chain followed by palladiumcatalysed chain extension was shown to be problematic. The preferred procedure, which involved prior formation of the complete carbon skeleton followed by lactonisation using Mukaiyama conditions, was employed to prepare
为了制备标题9元内酯,已经探索了两种途径。带有胚胎不饱和侧链的羟基酸的Lactonization,然后钯催化的链扩展被证明是有问题的。优选的方法涉及先形成完整的碳骨架,然后使用Mukaiyama条件进行内酯化,该方法用于制备8-脱氧-伪-AscidiatrienolideC。内酯化过程的效率特别显着。