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Darstellung und einige Spektraleigenschaften des 5,6-Dihydro-4,7-dithiaindan-1,3-dions

Preparation and some spectral properties of 5.6-dihydro-4.7-dithiaindan-1.3-dione

  • Organische Chemie und Biochemie
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Abstract

The preparation of 5.6-dihydro-4.7-dithiaindan-1.3-dione (I) and its 2-methyl and 2-ethyl derivatives* is described, starting from 5.6-dihydro-pyrazine-2.3-dicarboxylic anhydride. The reaction of this anhydride with acetic anhydride, according theGabriel modification of thePerkin synthesis, resulted in 7-oxo-2.3.5.7-tetrahydrofuro[3.4-b]pyrazin-5-ylideneacetic acid while reaction with propionic acid anhydride and butyric acid anhydride resulted in 2-methyl (2-ethyl)-5.6-dihydro-4.7-dithiaindan-1.3-dione.

The1H-NMR and electronic spectra of I were measured in solvents with different dielectric constant and it was found that I is more stable in the diketo form than 1.3-indandione.

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Authors and Affiliations

  1. Lehrsthhl für Organische Chemie der Naturwissenschaftlichen Fakultät der Universität Bratislava I, ČSSR

    P. Hrnčiar & R. Sokolová

Authors
  1. P. Hrnčiar
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  2. R. Sokolová
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Hrnčiar, P., Sokolová, R. Darstellung und einige Spektraleigenschaften des 5,6-Dihydro-4,7-dithiaindan-1,3-dions. Monatshefte für Chemie 104, 1224–1230 (1973). https://doi.org/10.1007/BF00910036

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  • DOI: https://doi.org/10.1007/BF00910036

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