作者:Loïc Tomas、David Gueyrard、Peter G. Goekjian
DOI:10.1016/j.tetlet.2010.06.006
日期:2010.9
An efficient synthesis of the spirocyclic fragment 1 of bistramides is reported. An olefination reaction of lactone 4 with sulfone 5 gave the enol ether 3, which upon cyclization in acidic media provided the spiroketal ring system. This compound was then converted into the C19–C36 fragment of the bistramides via successive Julia–Kocienski and Horner–Emmons olefinations.
报道了双链酰胺的螺环片段1的有效合成。内酯4与砜5的烯烃化反应得到烯醇醚3,烯醇醚3在酸性介质中环化后提供螺环系统。然后,该化合物通过连续的Julia-Kocienski和Horner-Emmons烯烃转化为双链酰胺的C19-C36片段。