Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/4330
Title: Synthesis of disazo pyrazolo[1,5-a]pyrimidines
Authors: Karcı, Fikret
Demirçalı, Aykut
Keywords: Condensation reaction
Diazo-coupling reaction
Disazo
Intermolecular cyclization
Pyrazolopyrimidine
Amines
Condensation
Synthesis (chemical)
Aminocrotononitrile
Arylhydrazone ketimino-butyronitriles
Arylhydrazonoacetoacetates
Ethyl acetoacetate
Ethyl cyanoacetate
Malonitrile
Azo dyes
amine
condensation
infrared radiation
spectroscopy
Abstract: p-Substituted anilines were diazotized and coupled with 3-aminocrotononitrile, malononitrile, ethyl cyanoacetate or ethyl acetoacetate to give the 2-arylhydrazone-3-ketimino-butyronitriles, 2-arylhydrazonomalononitriles, ethyl 2-arylhydrazonocyanoacetates and ethyl 2-arylhydrazonoacetoacetates, respectively. Cyclization of these arylhydrazone derivatives with 5-amino-4-arylazo-3-methyl-1H-pyrazoles or 3,5-diamino-4-arylazo-1H-pyrazoles in pyridine moiety afforded the corresponding disazo pyrazolo[1,5-a]pyrimidine derivatives. © 2006 Elsevier Ltd. All rights reserved.
URI: https://hdl.handle.net/11499/4330
https://doi.org/10.1016/j.dyepig.2006.02.007
ISSN: 0143-7208
Appears in Collections:Fen-Edebiyat Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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