SYNTHESIS OF TRANS-4,8,12,15,15-PENTAMETHYLBICYCLO[9,3,1]PENTADECA-3E,7Z,12Z-TRIENE, A GEOMETRICAL ISOMER OF ANHYDROVERTICILLOL

Abstract
A 7Z-isomer of anhydroverticillol skeleton was constructed in 15% yield when the 7E allyl bromide having secoverticillol framework was treated with LiN(TMS)2. Reductive removal of the SO2Ph group furnished a geometrical isomer of anhydroverticillol.