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Synthesen mit Nitrilen, 88. Mitt.: Spiro[indol- und Spiro[inden-pyrano[2,3-c]pyrazole]aus Cyanmethylenderivaten und Pyrazolonen

Syntheses with nitriles, 88: Spiro[indole- and spiro[indene-pyrano[2,3-c]pyrazoles] by reaction of cyanomethylene derivatives with pyrazolones

  • Organische Chemie Und Biochemie
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Summary

The reactivity of cyanomethylene-indolones (1 a–e) and 2-(dicyanomethylene)-indan-1,3-dione (4) towards 1,5-disubstituted 3-pyrazolones (2 a–c) was investigated. The reactions yield spiro[indene- and spiro[indole-4′- and 6′-pyrano[2,3-c]pyrazoles] (3 a–e,5 a–c). The structures are proven by13C-NMR-spectroscopy. The mechanisms of the reactions are discussed.

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Authors and Affiliations

  1. Institut für Organische Chemie, Karl-Franzens-Universität Graz, A-8010, Graz, Österreich

    Renate Dworczak

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  1. Renate Dworczak
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Dworczak, R. Synthesen mit Nitrilen, 88. Mitt.: Spiro[indol- und Spiro[inden-pyrano[2,3-c]pyrazole]aus Cyanmethylenderivaten und Pyrazolonen. Monatsh Chem 122, 731–737 (1991). https://doi.org/10.1007/BF00811473

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  • DOI: https://doi.org/10.1007/BF00811473

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