Friedel–Crafts Transannular Alkylation of Benzene with (Z,Z)-1,5-Cyclooctadiene: Reassignment of Two Phenylbicyclooctanes by13C NMR Spectroscopy and Separate Preparation
The five isomers of phenylbicyclooctanes were produced by Friedel–Crafts transannularalkylation of benzene with (Z,Z)-1,5-cyclooctadiene (1,5-COD) in the presence of a cation-exchanged montmorillonite (Mn+-mont). Mn+-Mont could be used repeatedly to provide the same products in good yields.