Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Yingyong Huaxue called Synthesis of 1-(2-chloro-4-pyridyl)-3-phenylurea, Author is Bian, Qing-Hua; Li, Zai-Feng; Qiao, Zhen; Li, Chang-Rong; Xing, Yu-Fen; Wang, Min, which mentions a compound: 2402-95-1, SMILESS is ClC1=CC=CC=[N+]1[O-], Molecular C5H4ClNO, Related Products of 2402-95-1.
The title compound was prepared in 93.3% yield by reaction of Ph isocyanate with 4-amino-2-chloropyridine. The latter was obtained by nitration, reduction of 2-chloropyridine-N-oxide. The best conditions of the reaction were given.
In addition to the literature in the link below, there is a lot of literature about this compound(2-Chloropyridine 1-oxide)Related Products of 2402-95-1, illustrating the importance and wide applicability of this compound(2402-95-1).
Reference:
Isoxazole – Wikipedia,
Isoxazole | C3H3NO – PubChem