The construction of the fourteen membered ring present in galbonolide B 1 is reported. The 10,11-diene system present in the southern portion of 1 has been constructed using an ester enolate rearrangement/silicon mediated fragmentation cascade, whilst the macrocycle has been synthesised following a Johnson rearrangement/mercury assisted ring closure protocol.
报道了伽波诺内酯B1中存在的十四元环的构建。利用酯烯醇重排/
硅介导裂解级联反应,合成了1的南部区域的10,11-二烯体系,而大环的合成则采用了约翰逊重排/
汞辅助闭环策略。