A new method for the synthesis of 5-substituted furan-3-carboxylates from MoritaâBaylisâHillman acetates of acetylenic aldehydes is reported. The process involves palladium-catalyzed isomerization followed by base-promoted deacetylation and cycloisomerization reactions. The utility of this chemistry is further demonstrated by the synthesis of Elliott's alcohol, a key intermediate of the pyrethroid resmethrins.
报告了一种从
乙炔醛的 MoritaâBaylisâHillman
乙酸酯合成 5-取代
呋喃-3-
羧酸酯的新方法。该过程包括
钯催化异构化,然后进行碱促进的脱乙酰化和环异构化反应。通过合成埃利奥特醇(一种拟
除虫菊酯类化合物
除虫菊酯的关键中间体),进一步证明了这种
化学方法的实用性。