High-dilution coupling of 5,13-bis(bromomethyl)dibenzo[c;1]chrysene (7) and 5,13-bis(sulfanylmethyl)dibenzo[c;1]chrysene 8 afforded the dithia derivative 9 which was converted, via the disulfone 10, into an unusually strained compound, [2.2](5,13)dibenzo[c;1]chrysenophane 5.
H. Matsubara, M. Osatani, K. Yano, T. Adachi and K. Yamamoto, J. Chem. Res. (S), 1999, 12 DOI: 10.1039/A806667A
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