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3 Polish Journal of Chemical Technology

3 2009

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One-pot synthesis of (S)-2-(6-methoxynaphtalen-2-yl)propanoic acid, (S)-Naproxen using Preyssler and Keggin-type heteropolyacids as green and reusable catalysts

Gharib A., Daneshtalab M., Scheeren J.(H.)W., Bamoharram F.F., Roshani M., Jahangir M.

Polish Journal of Chemical Technology

2009

Vol. 11, nr 3

8-14

A simple, clean and environmentally benign route to the enantioselective synthesis of (S)-2-(6-methoxynaphtalen-2-yl)propanoic acid, (S)-Naproxen 3 is described by using Preyssler heteropolyacid, H14[NaP5W30O110], as a green and reusable catalyst in water and in the presence of 1-(6-methoxynaphthalen-2-yl)propan-1-one 1, D-mannitol 2. The products were obtained in very good yields.

Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst

Gharib A., Daneshtalab M., Scheeren J.(H.)W., Bamoharram F.F., Roshani M., Jahangir M.

Polish Journal of Chemical Technology

2009

Vol. 11, nr 3

5-7

An efficient method for the preparation of 6,7-dimethoxyisatin and its derivatives was developed with good yield by using Preyssler-type heteropolyacid (HPA) as acid catalyst under green conditions. The comparison between Keggin type heteropolyacids, H3[PW12O40], H4[SiW12O40] and H4[SiMo12O40], H3[PMo12O40] and mineral acids with Preyssler's anion shows that the latter possess better catalytical activity than the other heteropolyacids and no degradation of the structure was observed.

Acetylation of p-aminophenol by Preyssler's anion [NaP5W30O110]14-, [NaP5 W29MoO110]14- with green condition at room temperature

Gharib A., Scheeren J.(H.)W., Bamoharram F.F., Roshani M., Jahangir M.

Polish Journal of Chemical Technology

2009

Vol. 11, nr 2

31-35

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.