Synthesis of some 4-carboxy-3- and 5-(2-hydroxyalkyl)pyrazole lactone derivatives
✍ Scribed by Suzanne Gelin; Bernard Chantegrel; Christian Deshayes
- Book ID
- 112126838
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1982
- Tongue
- English
- Weight
- 173 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0022-152X
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## Abstract magnified image Several 4‐substituted‐3, 5‐bis(2‐pyridyl)‐1__H__‐pyrazoles, where the substituent is chloro, bromo, iodo, nitro, diazo, were synthesized under mild reaction conditions in high yields. The structures of the products were characterized by ^1^H NMR, ^13^C NMR, ESI‐MS, IR a
## Abstract magnified image Compound of 4‐(ethoxycarbonyl)‐1,5‐diphenyl‐1__H__‐pyrazole‐3‐carboxylic acid **2** was obtained from the reaction of ethyl 4,5‐dioxo‐2‐phenyl‐4,5‐dihydrofuran‐3‐carboxylate and 1‐benzylidene‐2‐phenylhydrazine. A number of substitute pyrazole dicarboxylic acid derivative