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Abstract
Acetylation of p-Aminophenol by Preyssler's anion [NaP5W30O110]14-, [NaP5 W29MoO110]14- with green condition at room temperature Synthesis of acetaminophen at green condition and room temperature in the presence of the 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.
Highlights
Acetaminophen is an amide, a compound that is a derivative of ammonia that has been reacted with an acidic substance, in this case, acetic acid
The major disadvantage of HPA-1(aq) → MOH+2 (HPA), as a catalyst lies in their low hydrolytic stability that is very important in catalytic processes
If the principles proposed for green chemistry are applied, Preyssler catalyst will be introduced as a promising candidate for green catalysts
Summary
Acetaminophen is an amide, a compound that is a derivative of ammonia that has been reacted with an acidic substance, in this case, acetic acid. The preparation of Acetaminophen with using heteropolyacid as a catalyst can be conducted in simple conditions and give reasonable yield of an isolated productand the HPA catalysts were filtered, dried and can be recovered with structural degradation. Heteropolyacids (HPAs) have been extensively used as green solid acids and oxidation catalysts for many reactions and gained applications in industrial practice of both electrophilic catalysis and oxidation reactions[8]. In aqueous solution HPA, such as PW, SiW, Preyssler's anion [NaP5W30O110]14- and PMo are strong fully dissociated acids These compounds have several adventages as catalysts, which makes them economically and environmentally attractive. The catalytic applicability of Preyssler's anion with exclusive properties has been largely overlooked, with only a few demonstrations of catalytic activity[10] This heteropolyanion with 14 acidic protons, is an efficient ”supper acid” solid catalyst which can be used both in the homogeneous and heterogeneous phases[11]. The samples were dried at 120 – 140 oC, and the catalysts were calcined at 300 oC in the furnace prior to use
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