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Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :89
The title annulenediones 4–9 have been synthesized by first an aldol condensation of cyclohepta1,3,5-triene-1,6-dicarbaldehyde 10 or its vinylogous dialdehydes 11–14 with acetone to afford the dimethyl diketones 16–20 and then by a second aldol