Biomimetic studies towards the C28–C40 polycyclic domain of the azaspiracids
作者:Josep Aiguade、Junliang Hao、Craig J Forsyth
DOI:10.1016/s0040-4039(00)02156-0
日期:2001.1
An acyclic intermediate representing a putative biomimetic precursor of the C28–C40 domain of the novel marine toxin azaspiracid was constructed convergently from C28–C34 and C35–C40 fragments. In studying the assembly of the C28–C34 dioxabicyclo[3.3.1]nonane system via an intramolecular hetero-conjugate addition upon a C34–C36 enone, a stereoselective C-Michael addition intervened to provide a highly