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Synthesis 1992; 1992(12): 1265-1268
DOI: 10.1055/s-1992-26354
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A High-Yield Route to 1,2-Dihydrocyclobutabenzene-3,6-dicarboxylic Acid

Kenneth A. Walker* , Larry J. Markoski, Jeffrey S. Moore
  • *The Willard H. Dow Laboratories, Department of Chemistry and the Macromolecular Research Center, The University of Michigan, Ann Arbor, Michigan 48109-1055, USA
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Publication Date:
29 April 2002 (online)

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A simple five-step method for preparing the previously unknown 1,2-dihydrocyclobutabenzene-3,6-dicarboxylic acid (XTA) in high yield is presented. All intermediates were crystalline compounds which allowed the preparation to be scaled up without complication. The title compound is of interest as a crosslinkable derivative of the widely used monomer, terephthalic acid (TA).