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Synthese von 3-Hydroxy-1-oxo-4-alkyl-1H-benzo[d]pyrido[2,1—b]thiazolen

Synthesis of 3-hydroxy-1-oxo-4-alkyl-1H-benzo[d]pyrido-[2.1—b]thiazoles

  • Organische Chemie und Biochemie
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Abstract

Ring closure of γ-[benzothiazolyl-(2)]-acetoacetates affords benzopyridothiazoles. In the reaction of these substituted acetoacetic acid esters with alkyl halides in the presence of bases, the formation of benzopyridothiazoles is observed; these heterocyclic compounds are alkyl-substituted at C-4. IR- and1H-NMR-spectral data of the benzopyridothiazoles and some of their derivatives are given.

Zusammenfassung

γ-[Benzothiazolyl-(2)]-acetessigsäurealkylester können zu Benzopyridothiazolen cyclisiert werden. Bei Umsetzung solcher substituierter Acetessigester mit Alkylhalogeniden in Gegenwart von Basen erfolgt Cyclisierung zu Benzopyridothiazolen, die an C-4 alkylsubstituiert sind. IR- und1H-NMR-Daten dieser Heterocyclen und einiger ihrer Derivate werden mitgeteilt.

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Aus der DissertationN. Hawlitzky, Freiburg im Breisgau, 1970.

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Hawlitzky, N., Haller, R. Synthese von 3-Hydroxy-1-oxo-4-alkyl-1H-benzo[d]pyrido[2,1—b]thiazolen. Monatshefte für Chemie 102, 718–723 (1971). https://doi.org/10.1007/BF01167249

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  • DOI: https://doi.org/10.1007/BF01167249

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