Abstract
2,11-Dithia[3.3]metacyclophanes have been demonstrated to be valuable intermediates in the synthesis of a variety of novel bridged aromatic ring systems including 15,16-dihydropyrene and 15,16-dimethyldihydropyrene (Mitchell and Boekelheide, 1974). The conformational mobility in solution of this type of cyclic bis-sulfides was studied by nmr spectroscopy in relation to the effect of ring size and bridge substitution on the inversion rate in metacyclophanes (Sato et al., 1968, 1971).
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