4-Hydroxy Pyridinium Triflate@SiO2 Nanoparticles as a Novel Efficient Catalyst for Fries Rearrangement of Aryl Esters with High Selectivity was written by Ghalehbandi, Shermineh Sadat;Ghazanfari, Dadkhoda;Ahmadi, Sayed Ali;Sheikhhosseini, Enayatollah. And the article was included in Current Organic Synthesis in 2020.SDS of cas: 626-64-2 This article mentions the following:
A simple, fast and new method for the Fries rearrangement of aryl esters was developed. 4-Hydroxy pyridinium triflate functionalized silica was a very efficient, reusable and economically available catalyst for the Fries rearrangement in solvent-free condition and under microwave irradiation Also, a notable selectivity was observed in the presence of 4-hydroxy pyridinium triflate functionalized silica. Selectivity, shorter reaction time, high yield and easy work-up are advantages of this synthetic method. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2SDS of cas: 626-64-2).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. SDS of cas: 626-64-2