Abstract
Ring opening reactions of tetrazolo[1.5—a]pyridines, imidazo[1.2—b]pyridazines, s-triazolo[4.3—b]pyridazines and pyrimido[1.2—b]pyridazines are reported. The reaction takes place at the six-membered ring of azoloazines and the formed monocyclic compounds may subsequently isomerize at the double bonds or new cycles may be formed.
Zusammenfassung
Es wird über Ringöffnungen von Tetrazolo[1,5—a]pyridinen, Imidazo[1,2—b]pyridazinen, s-Triazolo[4,3—b]pyridazinen und Pyrimido[1,2—b]pyridazinen berichtet. Die Reaktion verläuft stets am Sechserring der Azoloazine und bei den entstandenen monocyclischen Verbindungen kann nachfolgend einecis—trans-Isomerisierung stattfinden, oder es kommt zu einem neuen Ringschluß.
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Herrn Prof. Dr.E. Ziegler zum 60. Geburtstag gewidmet.
Synthesen in der Pyridazin-Reihe, 49. Mitt.
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Pollak, A., Polanc, S., Stanovnik, B. et al. Über Ringöffnungen einiger Azolo-und Azinoazine. Monatshefte für Chemie 103, 1591–1603 (1972). https://doi.org/10.1007/BF00904613
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DOI: https://doi.org/10.1007/BF00904613