Application of green chemistry in decreasing adverse effect of ( R , S )-ibuprofen

Lipases from Candida rugosa (OF and MY) were tested for their application in the enzymatic kinetic resolution of (R,S)-ibuprofen by enantioselective esterification. In this study, screening of enzymes was performed, and lipase MY was selected as an optimal catalyst, which allows to obtain products with high enantiopurity. Additionally, the influence of reaction time on the enantiomeric ratio and conversion was tested. High values of enantiomeric ratio (E in the range of 40.1–71.3) of the esterification of (R,S)-ibuprofen were obtained using lipase MY, which has a great significance in the field of pharmaceutical synthesis of drugs. The chiral compounds (substrates and products) were analysed with the use of chiral stationary phases. As a result of the optimization, the reaction performed with the application of lipase MY allowed to achieve less toxic for human health (S)-enantiomer of ibuprofen with the high enantiomeric excess of product eep = 95%. Conversion of the reaction was c = 30.6% and enantioselectivity E = 58.9 after 126 h of incubation.

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