作者:Takahiro Hiramatsu、Motomasa Takahashi、Keiji Tanino
DOI:10.1016/j.tetlet.2013.12.069
日期:2014.2
involving the 6-7-6-5 polycyclic carbon framework with various functional groups. The stereoselective synthesis of the right-hand segment of tubiferal A was achieved on the basis of the cyclopentene annulation method and the semi-pinacol rearrangement reaction of an epoxy alcohol for constructing the trans-fused 6-5 bicyclic skeleton possessing two quaternary carbon atoms at the angular positions.
Tubiferal A,一种分离自粘菌的Tubifera dimorphotheca的三萜类化合物,表现出长春新碱(VCR)抵抗VCR耐药KB细胞系的逆转作用。该化合物具有复杂的结构,包括具有各种官能团的6-7-6-5多环碳骨架。在环戊烯环化法和环氧醇的半频烷醇重排反应的基础上,完成了微管A右侧片段的立体选择性合成,以构建具有两个季碳原子的反式稠合6-5双环骨架。角位置。