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Synthesis 1994; 1994(11): 1143-1145
DOI: 10.1055/s-1994-25658
short paper
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An Efficient One-Pot Synthesis of 1,4-Diacyl-2,3,5,6-tetramethoxybenzenes via Biscuprated Precursors

Gerhard Bringmann* , Torsten Geuder, Sven Harmsen
  • *Institut für Organische Chemie der Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Publication Date:
25 April 2002 (online)

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The efficient double acylation of 1,2,4,5-tetramethoxybenzene via the corresponding dicopper species is described; this reaction could not be attained either via the corresponding dilithium salts, or by Friedel-Crafts reaction. According to our method, the hitherto unknown diketones 1a and 1b are obtained in only one step in good yields. Further synthetic access to the compound 1a is realized by bismethylation of the corresponding terephthaloyl dichloride 7.