Channabasaveshwar, V. et al. published their research in Indian Journal of Chemistry in 1994 | CAS: 934-48-5

3,5-Dimethyl-1H-pyrazole-1-carboxamide (cas: 934-48-5) belongs to pyrazole derivatives. Pyrazole has two ring nitrogen atoms in which N1 is pyrrolic and N2 is pyridine-like. The N1 nitrogen is not reactive but is deprotonated in the presence of a base-forming anion. Protonation of pyrazole in strong acid leads to pyrazolium cations, which undergo electrophilic substitution preferentially at C3 rather than C4. The pyrazole anion is not reactive toward nucleophiles but is mostly reactive to electrophiles.Application of 934-48-5

Reactions of 4-(4-thiazolyl)sydnones in acid media: synthesis of 3-aryl-4-[2-(3,5-dimethyl/phenylpyrazol-1-yl)thiazol-4-yl]sydnones was written by Channabasaveshwar, V.;Yelamaggad, V.;Hiremath, Uma S.;Badami, Bharati V.. And the article was included in Indian Journal of Chemistry in 1994.Application of 934-48-5 This article mentions the following:

Acid stability of 4-(4-thiazolyl)sydnones was exploited in the preparation of the title compounds I (R = H, Cl, Me, MeO; R1 = Me, Ph) from 3-aryl-4-(2-hydrazino-4-thiazolyl)dydnones and 1,3-dicarbonyl compounds In the experiment, the researchers used many compounds, for example, 3,5-Dimethyl-1H-pyrazole-1-carboxamide (cas: 934-48-5Application of 934-48-5).

3,5-Dimethyl-1H-pyrazole-1-carboxamide (cas: 934-48-5) belongs to pyrazole derivatives. Pyrazole has two ring nitrogen atoms in which N1 is pyrrolic and N2 is pyridine-like. The N1 nitrogen is not reactive but is deprotonated in the presence of a base-forming anion. Protonation of pyrazole in strong acid leads to pyrazolium cations, which undergo electrophilic substitution preferentially at C3 rather than C4. The pyrazole anion is not reactive toward nucleophiles but is mostly reactive to electrophiles.Application of 934-48-5

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics