Convergent Synthesis of the Right-Hand Segment of Ciguatoxin
作者:Akinari Hamajima、Minoru Isobe
DOI:10.1021/ol0600741
日期:2006.3.1
[reaction: see text] A convergent synthesis of the right-hand half of ciguatoxin (the HIJKLM ring system) has been achieved with complete stereocontrol in the introduction of the stereocenters on the eight-membered I ring. Key steps are Sonogashira coupling, dicobalt complexation, intramolecular conjugate addition, and hydrogenation of an endo-olefin to provide the 39-alpha-methyl group.