stereocontrolled strategy toward the total synthesis of isoprostanes based on a bicyclic alpha,beta-epoxy ketone intermediate 6. Bicyclo[3.3.0]octene scaffold permitted stereodirection of reagents allowing stereoselective epoxidation, diastereoselective ketone reduction, and regioselective epoxide opening otherwise not accessible with a simple cyclopentene framework.
A practical and economical resolution of endo-bicyclo[3.3.0]oct-7-en-2-ol and endo-bicyclo[3.3.0]oct-6-en-2-ol was accomplished via lipase-catalyzed enantioselective irreversible transesterification with vinyl acetate.