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Acidity constant and solvatochromic behavior of some pyrazolo[1,5-a]pyrimidin-2-amine derivatives

✍ Scribed by El-Gahami, Mohamed A.; Mekky, Ahmed E.M.; Saleh, Tamer S.; Al-Bogami, Abdullah S.

Book ID
121789924
Publisher
Elsevier Science
Year
2014
Tongue
English
Weight
943 KB
Volume
129
Category
Article
ISSN
1386-1425

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πŸ“œ SIMILAR VOLUMES

Pyrimidine Derivatives and Related Compo
Pyrimidine Derivatives and Related Compounds II: Synthesis of some derivatives of pyrimido[1,2:2β€²,3β€²]pyrazolo[1,5-a]pyrimidines, a new ring system
✍ Mohamed Helmi Elnagdi; Mohamed Mohamed Mohamed Sallam; Mohamed Ajmal Mohamed Ili πŸ“‚ Article πŸ“… 1975 πŸ› John Wiley and Sons 🌐 German βš– 705 KB

## Abstract 3,5‐Diamino‐4‐phenylazo‐pyrazoles (**1a–1c**) react with acetylacetone and with ethyl acetoacetate to yield the corresponding pyrazolo[1,5‐a]pyrimidine derivatives **2a–2c** and **3a–3c**, respectively. Whereas **1a–1c** add readily to methyl acrylate yielding the 4,5,6,7‐tetrahydropyr