Abstract
The title compounds26 and32 were prepared by systematic mono- and bisanellation of sixmembered rings to the positions 5,6 and 5′,6′, resp. of 2,2′-spirobiindane.S E acylation and subsequent transformations of the acylgroups afforded many derivatives with substituents in positions 4 and 4′ of the parent compounds which were required for testing semiempirical values of chirality functions.
5,6,7,8-Tetrahydrobenz[f]indane (9) and several of its 4-substituted derivatives were prepared as models for the anellation and substitution reactions.
Tentative preferred conformations of the 4-acylgroups could be deduced from1H-nmr spectra.
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Neudeck, H., Schlögl, K. & Tscheplak, H. Aromatische Spirane, 12. Mitt.. Monatsh Chem 116, 661–676 (1985). https://doi.org/10.1007/BF00798792
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DOI: https://doi.org/10.1007/BF00798792