作者:J. Stephen Clark、John M. Northall、Frédéric Marlin、Bastien Nay、Claire Wilson、Alexander J. Blake、Michael J. Waring
DOI:10.1039/b811245b
日期:——
The synthesis of 5-epi-hydroxycornexistin (44), a diastereoisomer of the herbicidal natural product hydroxycornexistin (2) has been completed. Palladium mediated sp(2)-sp(3) coupling of the stannane 25 and the chloride 31 and ring-closing metathesis of the resulting diene 32 has been used to construct the tricyclic lactone 34a, which possesses the nine-membered carbocyclic core found in the natural
已经完成了除草天然产物羟基cornexistin(2)的非对映异构体5-epi-hydroxycornexistin(44)的合成。锡烷25与氯化物31的钯介导的sp(2)-sp(3)偶联以及所得二烯32的闭环易位已被用于构建三环内酯34a,该三环内酯34a具有在碳纳米管中发现的九元碳环核。天然产物,收率高。5-表位-羟基cornexistin的合成(44)已经确定了使用呋喃作为天然产物中存在的环状酸酐单元的前体的可行性,并证明了其他后期转化的可行性,这些转化将用于制备羟基cornexistin( 2)。