Highly condensed polycyclic systems. Part I. Tetracyclo-[6,4,0,04,12,05,9]dodec-10-enes
Abstract
Generation of the bicyclo[6,4,0]dodeca-4,9,11-triene system from cis,cis-cyclo-octa-1,5-diene, using tetracyclone, 1,2,3,4-tetrachloro-5,5-dimethoxycyclopentadiene, or α-pyrone, is followed by an intramolecular Diels-Alder reaction and results in the formation of tetracyclo[6,4,0,04,12,05,9]dodec-10-enes.