Stereocontrolled Total Syntheses of (−)‐Rotenone and (−)‐Dalpanol by 1,2‐Rearrangement and SNAr Oxycyclizations

The total syntheses of (−)‐rotenone and (−)‐dalpanol have been achieved by a group‐selective, stereospecific 1,2‐shift of an epoxy alcohol and S_NAr cyclizations. Three oxacycles are constructed, thus illustrating a versatile synthetic route to various rotenoids.