2,6-Diaryl-4,4-disubstituted-4H-thiopyran: Source for spiro heterocycles

2,6-Diaryl-4,4-disubstituted-4H-thiopyran: Source for spiro heterocycles

The 1,5‐diaryl‐3,3‐disubstituted‐1,5‐pentanedione on reaction with ammonium acetate, phosphorus pentoxide and phosphorus pentasulfide gave respective 1,4‐dihydropyridine, 4H‐pyran and 4H‐thiopyran. Novel spiro heterocycles have been obtained by the cyclocondensation of 4H‐thiopyran with hydrazine, h...

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Veröffentlicht in:Journal of heterocyclic chemistry 2002-07, Vol.39 (4), p.649-653
Hauptverfasser: Padmavathi, Venkatapuram, Balaiah, Akula, Reddy, Dandu Bhaskar
Format: Artikel
Sprache:eng
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Zusammenfassung:The 1,5‐diaryl‐3,3‐disubstituted‐1,5‐pentanedione on reaction with ammonium acetate, phosphorus pentoxide and phosphorus pentasulfide gave respective 1,4‐dihydropyridine, 4H‐pyran and 4H‐thiopyran. Novel spiro heterocycles have been obtained by the cyclocondensation of 4H‐thiopyran with hydrazine, hydroxylamine, urea and thiourea.
ISSN:0022-152X
1943-5193
DOI:10.1002/jhet.5570390408