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The formation of pyrazolo[1,5-a]pyrimidines by the reaction of 3-(4-chlorophenyl)pyrazol-5-amine with chalcones

✍ Scribed by Jairo Quiroga; Braulio Insuasty; Ricardo Rincon; Marina Larrahondo; Norbert Hanold; Herbert Meier


Book ID
112131041
Publisher
Journal of Heterocyclic Chemistry
Year
1994
Tongue
English
Weight
156 KB
Volume
31
Category
Article
ISSN
0022-152X

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πŸ“œ SIMILAR VOLUMES


Synthesis of 6-(2-hydroxybenzoyl)pyrazol
✍ Jairo Quiroga; Diana MejΓ­a; Braulio Insuasty; Rodrigo AbonΓ­a; Manuel Nogueras; A πŸ“‚ Article πŸ“… 2002 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 41 KB

## Abstract Reaction of 3‐formylchromone (**1**) with 5‐amino‐1__H__‐pyrazoles (**2**) in ethanol, afforded 6‐(2‐hydroxy‐benzoyl)pyrazolo[1,5‐__a__]pyrimidines (**3a‐g**) in good yields. The structures and the regiospecificity of the reaction were established by nmr measurements and X‐ray analysis,