In a simple, high-yielding reaction the triple-layered compound 2 is obtained from cyclophane 1 by Lewis acid catalyzed dimerization and subsequent aromatization of the central six-membered ring. The reaction allows access to interesting multilayered arenes, and the intramolecular interactions of such π-electron systems can now be studied.
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Hopf et al. (1992) studied this question.
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