Generation of nonaphene and dithianonaphene derivatives - Model compounds for bent molecular ribbons [German]

摘要

The cycloaddition of the bisdienophile 1 and the benzo[c]furan generated in situ from the precursor 2 yielded the nonaphene derivative 4 (Scheme 1). A related reaction (Scheme 3) was used for the preparation of the dithianonaphene systems 6a, b, c, namely the [2 pi+8 pi] cycloaddition of 1 and 2H-benzothiete (5/5'). Acidic dehydration (aromatization) of 6a, b, c led to the dithianonaphenes 7a, b, c (Scheme 4). [References: 13]