Cellulose as recyclable organocatalyst for ipso-hydroxylation of arylboronic acids was written by Laskar, Khairujjaman;Paul, Subham;Bora, Utpal. And the article was included in Tetrahedron Letters in 2019.Quality Control of 5-Hydroxy-2-methoxylpyridine This article mentions the following:
Cellulose catalyzed oxidative hydroxylation of aryl and hetero-arylboronic acids to the corresponding phenols under metal and base free strategy was demonstrated. The sustainable ipso-hydroxylation took place using hydrogen peroxide as an oxidant in water under mild condition in shorter period of time. Easy recovery and reusability of heterogeneous catalyst without significant loss in catalytic yield was seen and the protocol was environmentally benign. In the experiment, the researchers used many compounds, for example, 5-Hydroxy-2-methoxylpyridine (cas: 51834-97-0Quality Control of 5-Hydroxy-2-methoxylpyridine).
5-Hydroxy-2-methoxylpyridine (cas: 51834-97-0) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. 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 5-Hydroxy-2-methoxylpyridine