Perevalov, V. P. et al. published their research in Khimiya Geterotsiklicheskikh Soedinenii in 1985 | CAS: 54210-32-1

1-Methyl-3-nitro-1H-pyrazole (cas: 54210-32-1) 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. The presence of both electronegative nitrogen atoms in the pyrazole ring reduces the electron density of the C3- and C5-positions leaving electron density of C4-position unaltered. Thus the C4-position is vulnerable to electrophilic attack. The C3 electrophilic-position may undergo deprotonation in the presence of a strong base leading to ring opening.Product Details of 54210-32-1

Spectroscopic and electrochemical properties of o-amino-1-methylnitropyrazoles was written by Perevalov, V. P.;Baryshnenkova, L. I.;Sennikov, G. P.;Savina, I. B.;Isaev, Sh. G.;Andreeva, M. A.;Stepanov, B. I.. And the article was included in Khimiya Geterotsiklicheskikh Soedinenii in 1985.Product Details of 54210-32-1 This article mentions the following:

The electronic, IR, and NMR spectra and the polarog. half-wave potentials of pyrazoloes I (R, R1, R2 = H, NH, NO2; NO2, NH2, H; NH2, NO2, H; H, NO2, NH2) were examined These properties were influenced by the degree of charge transfer between the NH2 and NO2 groups. In the experiment, the researchers used many compounds, for example, 1-Methyl-3-nitro-1H-pyrazole (cas: 54210-32-1Product Details of 54210-32-1).

1-Methyl-3-nitro-1H-pyrazole (cas: 54210-32-1) 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. The presence of both electronegative nitrogen atoms in the pyrazole ring reduces the electron density of the C3- and C5-positions leaving electron density of C4-position unaltered. Thus the C4-position is vulnerable to electrophilic attack. The C3 electrophilic-position may undergo deprotonation in the presence of a strong base leading to ring opening.Product Details of 54210-32-1

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