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Synthesen von Heterocyclen, 81. Mitt.: Über substituierte Glyoxalhydrazone

  • Organic Chemistry and Biochemistry
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Monatshefte für Chemie und verwandte Teile anderer Wissenschaften Aims and scope Submit manuscript

Zusammenfassung

3-Phenylazo-4-hydroxy-2-oxo-indeno[1,2-b]pyran (4) läßt sich durch Erhitzen mit verd. Lauge zum 3′-Hydroxyindenyl-(2′)-glyoxal-2-phenylhydrazon (11) hydrolysieren, welches mit Phenylhydrazin unter Ringschluß zum 1,4-Dihydro-1-phenylindeno-[1,2-c]pyrazol-(3)-aldehydphenylhydrazon (21) reagiert.

Abstract

3-Phenylazo-4-hydroxy-2-oxo-indeno[1,2-b]pyran (4) is hydrolysed by heating in aqueous sodium hydroxide solution to 3′-hydroxyindenyl-(2′)-glyoxal-2-phenylhydrazone (11). This compound reacts with phenylhydrazine under ring closure to 1,4-dihydro-1-phenylindeno[1,2-c]pyrazol-(3)-aldehyde phenylhydrazone (21).

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  1. Institut für Organische und Pharmazeutische Chemie der Universität Graz, Graz, Österreich

    E. Ziegler & F. Eichenseer

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  1. E. Ziegler
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  2. F. Eichenseer
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Ziegler, E., Eichenseer, F. Synthesen von Heterocyclen, 81. Mitt.: Über substituierte Glyoxalhydrazone. Monatshefte für Chemie 97, 391–397 (1966). https://doi.org/10.1007/BF00905256

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  • DOI: https://doi.org/10.1007/BF00905256

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