Synthesis of 5H-cyclohepta(4,5)pyrrolo(2,3-b)indoles.
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概要
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The title compounds (indolo[2,3-<I>b</I>][1]azaazulenes) were synthesized from 2-hydrazino-1-azaazulene and cyclohexanone utilizing Fischer's indole synthesis, followed by dehydrogenation of the <I>N</I>-acetylated tetrahydro precursor with DDQ. Structures of the neutral and cationic species of these compounds were discussed on the basis of the spectral data.
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