Dierckx, are structurally unique pentacyclic or hexacyclic diterpenoid derivatives. The synthesis of a structurally simplified model compound (8), corresponding to the characteristic spiro-fused CDE ring portion of 1–4, was accomplished by employing sequential, double nucleophilic substitution reactions as the key steps.
Breviones A-E(1 - 5)中,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。在结构上简化模型化合物(合成8),对应于特性螺稠合的环CDE的部分1 - 4,通过采用连续的,双亲核取代反应的关键步骤来完成。