A synthesis of the title compound and related structures is reported. The procedure involves double alkylation of a β-ketoester followed by double SNAr ring closure from the γ carbon to give a dibenzo[3.3.1]bicyclic unit. This paper appears to be the first to generate a mid-sized bicyclic target by a double SNAr process. The synthesis can be performed in one step, but yields are superior (52–62%) when a two-stage procedure is used.
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