Bond Fixation in Annulenes. 9. Equalization of Ring Inversion and Bond Shifting Energetics in 1,2,3,4-tetramethylcyclooctatetraene. Asymmetric Synthesis, Direct Resolution, and Absolute Configuration of the Optically Active Hydrocarbon

Article abstract of DOI:10.1021/ja00535a033

Optically active 1,2,3,4-tetramethylcyclooctatetraene (5*), available by asymmetric synthesis from (-)-cis-3,4-dimethylcyclohexene-4,5-dicarboxylic acid (14*) or preferably by direct resolution with (-)-endo-bornyl-1,2,4-triazoline-3,5-dione (19*), underg