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