Synthetic Studies on Cyathins: Enantioselective Total Synthesis of (+)-Allocyathin B<sub>2</sub>
作者:Masashi Takano、Akinori Umino、Masahisa Nakada
DOI:10.1021/ol048010i
日期:2004.12.1
[reaction: see text] The enantioselective total synthesis of (+)-allocyathin B(2) has been achieved. Our approach features a convergent enantioselective construction of the 5-6-7 tricyclic core system using the originally developed chiral building blocks via asymmetric catalysis, the intramolecular aldol reaction in high yield, successful samarium diiodide-mediated ring expansion, and a newly developed