Pyridine-pyrazole compound as inhibitor for steel in 1M HCl was written by Bouklah, M.;Attayibat, A.;Hammouti, B.;Ramdani, A.;Radi, S.;Benkaddour, M.. And the article was included in Applied Surface Science in 2005.Application In Synthesis of 2-(5-Methyl-1H-pyrazol-3-yl)pyridine This article mentions the following:
The influence of 3,5-dimethyl-1H-pyrazole, pyridine and 2-(3-methyl-1H-pyrazol-5-yl) pyridine (P3) on the corrosion inhibition of carbon steel in 1M HCl solution was studied by using weight-loss, potentiodynamic and EIS measurements. P3 was the best inhibitor, and its inhibition efficiency increases with increasing inhibitor concentration to attain 89% at 10-3 M. Potentiodynamic polarization studies clearly reveal that it acts essentially as a cathodic inhibitor. The inhibitor decreased the corrosion rates. The efficiency values obtained by the various methods used were in agreement. Adsorption of P3 on the steel surface has an S-shaped adsorption isotherm. In the experiment, the researchers used many compounds, for example, 2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4Application In Synthesis of 2-(5-Methyl-1H-pyrazol-3-yl)pyridine).
2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4) 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. Pyrazoles can be selectively lithiated at different carbons and subsequently react with electrophiles depending on the substitution patterns.Application In Synthesis of 2-(5-Methyl-1H-pyrazol-3-yl)pyridine
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics