Naslov
Physico-chemical steering towards greener processes - optimization of Omeprazole synthesis

Autori
Cindro, Nikola ; Vojčić Nina ; Požar, Josip ; Bregović, Nikola ; Horvat, Gordan ; Pičuljan, Katarina ; Meštrović, Ernest ; Tomišić, Vladislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
24. Congress of Chemists and Technologists of Macedonia : Book of Abstracts / Hadzi Jordanov, Svetomir ; Tomovska, Elena - Skopje : Society of Chemists and Technologists of Macedonia, 2016

ISBN
978-9989-760-13-6

Skup
24. Congress of Chemists and Technologists of Macedonia

Mjesto i datum
Ohrid, Sjeverna Makedonija, 11.09.2016. - 14.09.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
omeprazole ; synthesis ; solvent effec t ; kinetics ; thermodynamics
(omeprazole ; synthesis ; solvent effect ; kinetics ; thermodynamics)

Sažetak
Omeprazole is a trivial name for 6-methoxy-2- [(4- methoxy-3, 5-dimethylpyridin-2- yl)methanesulfinyl]-1H-1, 3-benzodiazole, an active pharmaceutical ingredient. This compound was the first proton pump inhibitor on the market, and is considered by the WHO to be one of the essential medications. Production of omeprazole usually follows the route shown below. The preparation procedure is conducted as a one- pot synthesis involving condensation of the benzimidazole moiety with pyridine moiety in reflux conditions, followed by the addition of appropriate catalytic compounds. The aim of this work was to modify the synthetic route according to the guidelines attained through thermodynamic and kinetic studies of both phases in the one-pot procedure, with the emphasis on the solvent effect. It has been shown that the MeOH/H2O ratio has dramatic effect on the first- step reaction rate which can in principle be used to carry out the reaction at room temperature almost ten times faster. In addition, the increase of water content leads to a lower product solubility which eventually results in higher reaction yields. In the second phase, i.e. oxidation step, it has been proven that after pH correction in order to maximize precipitation of omeprazole as the neutral species, relatively long trituration periods have virtually no effect on the overall yield and purity profile, and is thus unnecessary.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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