Summary
Reactions of 3-arylidenechromanones (1 – 4) and -1-thiochromanones (5 – 8) with thiourea gave thiazines (9 – 16) under acidic and pyrimidine derivatives (17 – 21) under alkaline reaction conditions
Zusammenfassung
Die Umsetzung von 3-Arylidenchromanonen1 – 4 und -1-thiochromanonen5 – 8 mit Thioharnstoff liefert unter sauren Bedingungen die Thiazine9 – 16 und in basischem Milieu die Pyrimidine17 – 21.
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References
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Lévai, A. Fused heterocycles, VI: Reactions of 3-arylidenechromanones and -1-thiochromanones with thiourea. Monatsh Chem 122, 691–695 (1991). https://doi.org/10.1007/BF00811468
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DOI: https://doi.org/10.1007/BF00811468