Triple self-condensation of fused cycloalkanonylparacyclophanes promoted by titanium tetrachloride and triethylamine

The triple self-condensation of [2](4,7)indano[2]paracyclophan-5-one and 5-oxo-4,5,6,7-tetrahydro[2]paracyclo[2](1,4)naphthalenophane, as representative examples of fused cycloalkanonylparacyclophanes, promoted by titanium tetrachloride and triethylamine is here reported.