A novel approach to functionalized (E)-1,4-diaryl-1-butenes by Heck reaction and their applications for the construction of dibenzylbutyrolactone lignan skeletons by radical cyclization
作者:Rekha Singh、Gobind C. Singh、Sunil K. Ghosh
DOI:10.1016/j.tetlet.2005.05.050
日期:2005.7
[Pd(allyl)Cl]2 catalyzed Heck reaction of aryl iodides and electronically neutral terminal olefins generated in situ by fluoride induced protiodesilylation of alkenylsilanol derivatives under mild conditions has been developed. The products, viz. terminally substituted styrenes and (E)-1,4-diaryl-1-butenes were obtained in very good yields. The dibenzylbutyrolactone lignan skeletons have been prepared
已经开发了在高温条件下由氟化物诱导的烯基硅烷醇衍生物的Protoodesisilylation现场生成的高度区域和立体选择性[Pd(烯丙基)Cl] 2催化的芳基碘化物和电子中性末端烯烃的Heck反应。产品,即。以非常好的产率获得了末端取代的苯乙烯和(E)-1,4-二芳基-1-丁烯。已经使用两种区域和立体选择性Bu 3 SnH介导的自由基环化途径制备了二苄基丁内酯木脂素骨架。