Experiments directed towards the synthesis of anthracyclinones. VI. Claisen rearrangements of 1,4-Bis(prop-2'-enyloxy)anthraquinone

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Abstract
The Claisen rearrangement of 1,4-bis(prop-2'-enyloxy)anthraquinone (1) in N,N-diethylaniline and acetic anhydride has been examined. New products include compounds (3), and (6) and (14) in which a double bond has also migrated. Rearrangement of the compound (3) in o-dichlorobenzene affords the ketone (2), which supports an earlier mechanistic proposal.

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