Breviones A∼E (1∼5), allelopathic agents isolated from Penicillium brevicompactum Dierckx, are structurally unique pentacyclic or hexacyclic diterpenoid derivatives. The first synthesis of brevione B (2) was achieved by employing the double SN2′-type tandem reaction as a key step.
Breviones A〜E(1〜5),从分离的化感剂短密青霉Dierckx,在结构上是独特五环或六二萜衍
生物。brevione B(2)的首次合成是通过使用双S N 2'型串联反应作为关键步骤而实现的。