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Tautomeric structure of dihydropyrazolo[1,5-a]-pyrimidin-7-one in a solution. A facile synthesis of novel 6-quinoxalinyldihydropyrazolo[1,5-a]pyrimidin-7-ones by ring transformation

✍ Scribed by Yoshihisa Kurasawa; Ho Sik Kim; Rika Futatsukawa; Chisako Watanabe; Atsushi Takada; Yoshihisa Okamoto


Book ID
112129357
Publisher
Journal of Heterocyclic Chemistry
Year
1989
Tongue
English
Weight
159 KB
Volume
26
Category
Article
ISSN
0022-152X

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A facile one step synthesis of 1,6 -dihy
✍ Nalla Ram Reddy; Ghanta Mahesh Reddy; Battu Saida Reddy; Padi Pratap Reddy πŸ“‚ Article πŸ“… 2005 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 77 KB

## Abstract A general synthetic approach to pyrazolo[4,3‐__d__]pyrimidines is reported. Aldehydes, arylideneanilines, carboxylic acids and orthoesters are used as one‐carbon units for bridging the two amino functions of 4‐amino‐1‐alkyl‐3‐propylpyrazole‐5‐carboxamides.