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Synthesis 1993; 1993(12): 1211-1212
DOI: 10.1055/s-1993-26025
short paper
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One-Pot Synthesis of a Pentacyclic Bis(aminophenolic)bipyridone from Monocyclic Precursors

Doetze J. Sikkema*
  • *Akzo Research Laboratories Arnhem, P.O. Box 9300, NL-6800SB Arnhem, the Netherlands
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Publication Date:
29 April 2002 (online)

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1,4-cyclohexanedione-2,5-dicarboxylic methyl ester can be condensed with 2,4-diaminophenol, aromatized and cyclized to 3,10-diamino-2,9-dihydroxyquino [2,3-b]acridine-7(5H),14(12H)-dione in a one-pot procedure. The product must be handled with care to avoid oxidation; isolation as the hydrochloride salt allows convenient manipulation and purification to polymerization quality material.