Catalytic Method for Synthesis of Aspirin by a Green, Efficient and Recyclable Solid Acid Catalyst (Preyssler's Anion) at Room Temperature

Abstract

Synthesis of aspirin at room temperature via O-acetylation of salicylic acid in the presence of Preyssler type heteropolyacids has been investigated in order to contribute toward clean technology, which is the most important need of the society. All of the catalysts are recyclable and reusable.

Brønsted Acidic Ionic Liquids: New, Efficient, and Green Promoter System for the Synthesis of 4(3H)-Quinazolinones

“…In continuation of our previous works on the applications of reusable acid catalysts in the synthesis of organic compounds, [28][29][30][31] herein we report a simple method for the green synthesis of 4(3H)-quinazolinones from reaction of 2-aminobenzamide with aroyl chlorides in the presence of Brønsted acidic ILs at 90 C under solvent-free conditions (Scheme 1).…”

A Simple and Efficient One‐pot Synthesis of 1,4‐dihydropyridines Using Nano‐WO3‐ supported Sulfonic Acid as an Heterogeneous Catalyst under Solvent‐free Conditions

“…To this reason heterogeneous catalysts have drawn attention due to their ease of separation and recyclability. [22][23][24][25][26] Nano particles have higher numbers of active sites, due to their high surface/volume ratio. 27 Therefore, studying heterogeneous nano-catalysts is considered to be an ongoing research resulted in introduction of many modified catalysts.…”

Preyssler Heteropolyacid Supported on Nano-SiO2: A Green and Reusable Catalyst in Selective Oxidation of Benzyl Alcohols to Benzaldehydes

“…[12] Catalysis using Preyssler HPA has been widely developed in a broad range of organic synthesis and environmentally benign catalysis during the past few years, by our research group. [13][14][15][16][17][18][19][20][21][22] Good yields, high selectivity, economic convenience, ease of work-up, high hydrolytic and thermal stability, and high catalytic activity of Preyssler HPA have motivated increasing potential for nanocatalysis in organic synthesis and environmentally benign catalysis. [23][24][25][26][27][28][29] Recently, we developed an efficient method for the oxidation of benzyl alcohols to corresponding carbonyl compounds using Preyssler catalyst in the bulk form.…”