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An Unexpected Reaction Between 6,7-Dimethoxy-2H-1,3-benzothiazine and Dimethyl Acetylenedicarboxylate

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Summary.

6,7-Dimethoxy-2H-1,3-benzothiazine reacted with dimethyl acetylenedicarboxylate in aqueous methanol to give heterocycles with unexpected structures. A mechanism is proposed for the reaction.

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Authors and Affiliations

  1. Institute of Pharmaceutical Chemistry, University of Szeged, 6720, Szeged, Hungary

    Gábor Bernáth

  2. Research Group for Heterocyclic Chemistry of the Hungarian Academy of Sciences and the University of Szeged, 6720, Szeged, Hungary

    Lajos Fodor & Gábor Bernáth

  3. Research Group for Structural Chemistry and Spectroscopy, Hungarian Academy of Sciences – Department of General and Inorganic Chemistry, Eötvös Loránd University, 1518, Budapest, Hungary

    Pál Sohár

  4. Institute of Organic Chemistry, University of Mainz, 55099, Mainz, Germany

    Diether Gröschl & Herbert Meier

Authors
  1. Lajos Fodor
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  2. Gábor Bernáth
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  3. Pál Sohár
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  4. Diether Gröschl
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  5. Herbert Meier
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Corresponding author

Correspondence to Lajos Fodor.

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Fodor, L., Bernáth, G., Sohár, P. et al. An Unexpected Reaction Between 6,7-Dimethoxy-2H-1,3-benzothiazine and Dimethyl Acetylenedicarboxylate. Monatsh. Chem. 137, 231–234 (2006). https://doi.org/10.1007/s00706-005-0408-6

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  • DOI: https://doi.org/10.1007/s00706-005-0408-6

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