Chemical shift of the γ-proton signal in α-substituted pyridine derivatives was written by Perkampus, Heinz H.;Krueger, Uwe. And the article was included in Chemische Berichte in 1967.Quality Control of 2-Phenoxypyridine This article mentions the following:
The chem. shifts of the γ-proton in 19 α-substituted pyridine derivatives are correlated with the electron attracting and donating properties of the substituents, and a parallelism to Hammett constants of these substituents is presented. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Quality Control of 2-Phenoxypyridine).
2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Quality Control of 2-Phenoxypyridine