Noun
A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorless liquid with a peculiar pungent odor. It is the nucleus of a large number of organic substances, among which several vegetable alkaloids, as nicotine and certain of the ptomaines, may be mentioned. See Lutidine.
Source: Webster's dictionaryAmong the largest 25 production sites for pyridine, eleven are located in Europe (as of 1999). Source: Internet
As a result, the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Source: Internet
Biosynthesis Several pyridine derivatives play important roles in biological systems. Source: Internet
Bönnemann cyclization Bönnemann cyclization The trimerization of a part of a nitrile molecule and two parts of acetylene into pyridine is called Bönnemann cyclization. Source: Internet
Compared to pyridine, N-alkylation and N-oxidation are more difficult. Source: Internet
Direct nitration of pyridine requires harsh conditions and has very low yields. Source: Internet