Synthesis of<i>cis</i>-Fused Bicyclic Systems by Radical Cyclization Approach: Formal Synthesis of Ethisolide and<i>iso</i>-Avenaciolide
作者:Gangavaram V. M. Sharma、Devoju Harinada Chary
DOI:10.1080/00397911.2013.871562
日期:2014.6.18
iso-avenaciolide was achieved using furanoid glycal-vinyl radical intermediates. The vinyl radical cyclization by 5-exo-dig mode gave the cis-fused bicyclic systems with an efficient introduction of the exo-methylene group, besides helping in the inversion of the adjacent stereocentre. Further, the study describes the synthesis of cis-fused bicyclic systems from L-arabinose and D-xylose for the creation
A short totalsynthesis of (±)-ethisolide and (±)-isoavenaciolide was accomplished from (±)-oxanorbornenone respectively in 11 and 12 steps, using a radicalcyclization as a keystep.