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Lipase-catalyzed synthesis of (S)-naproxen ester prodrug by transesterification in organic solvents

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Abstract

A lipase-catalyzed enantioselective transesterification process was developed for the synthesis of (S)-naproxen 2-N-morpholinoethyl ester prodrug from racemic 2,2,2-trifluoroethyl naproxen ester in organic solvents. By selecting isooctane and 37°C as the best solvent and temperature, the apparent fits of the initial conversion rates for transesterification and hydrolysis side reaction suggest a ping-pong Bi-Bi enzymatic mechanism with the alcohol as a competitive enzyme inhibitor. Improvements in the initial conversion rate and the productivity for the desired (S)-ester product were obtained after comparing with the result of an enantioselective esterification process. Studies of water content in isooctane and alcohol containing various N,N-dialkylamino groups on the enzyme activity and enantioselectivity, as well as the recovery of (S)-ester product by using extraction, were also reported.

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Correspondence to Shau-Wei Tsai.

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Tsai, SW., Tsai, CS. & Chang, CS. Lipase-catalyzed synthesis of (S)-naproxen ester prodrug by transesterification in organic solvents. Appl Biochem Biotechnol 80, 205–219 (1999). https://doi.org/10.1385/ABAB:80:3:205

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  • DOI: https://doi.org/10.1385/ABAB:80:3:205

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