| Abstrakt: |
The title compound 35 was prepared by catalytic reduction of the diones 29 a and 11a. 29 a was synthesized by systematic anellation of fivemembered rings to the positions 5,6 and 5′,6′, resp., of 2,2′-spirobiindane. The preparation of 11 a was achieved by Friedel-Crafts cyclisation of bis-(5-indanylmethyl)-malonic acid. s-Hydrindacene-1-one 5 a was prepared as a precursor for the synthesis of 11 a (see forthcoming publication) and its derivates as models for corresponding anellation and substitution reactions. [ABSTRACT FROM AUTHOR] |
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