In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Selective C-H Fluorination of Pyridines and Diazines Inspired by a Classic Amination Reaction, published in 2013-11-22, which mentions a compound: 34941-92-9, Name is 4-Chloro-2-fluoropyridine, Molecular C5H3ClFN, SDS of cas: 34941-92-9.
Fluorinated heterocycles are prevalent in pharmaceuticals, agrochems., and materials. However, reactions that incorporate fluorine into heteroarenes are limited in scope and can be hazardous. The authors present a broadly applicable and safe method for the site-selective fluorination of a single carbon-hydrogen bond in pyridines and diazines using com. available silver(II) fluoride. The reactions occur at ambient temperature within 1 h with exclusive selectivity for fluorination adjacent to nitrogen. The mild conditions allow access to fluorinated derivatives of medicinally important compounds, as well as a range of 2-substituted pyridines prepared by subsequent nucleophilic displacement of fluoride. Mechanistic studies demonstrate that the pathway of a classic pyridine amination can be adapted for selective fluorination of a broad range of nitrogen heterocycles.
Here is just a brief introduction to this compound(34941-92-9)SDS of cas: 34941-92-9, more information about the compound(4-Chloro-2-fluoropyridine) is in the article, you can click the link below.
Reference:
Pyrroline – Wikipedia,
1-Pyrroline | C4H7N – PubChem