[2.2]Metaparacyclophane (20, cis-tricyclo[9.2.2.14,8]octadeca-4,6,8(16)-triene) and [2.2]orthoparacyclophane (22, cis-tricyclo[10.2.2.04,9]octadeca-4,6,8-triene) containing a 1,4-cyclohexano group bridged with two carbons are prepared through a coupling reaction to form the dithiacyclophanes, oxidation yields the sulfones followed by pyrolysis.
S. Lin, F. Yang and W. Tien, J. Chem. Res. (S), 1999, 608 DOI: 10.1039/A904559G
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