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Biotechnol Lett. 2004 Jul;26(13):1073-6.

Regioselective acylation of flavonoids catalyzed by immobilized Candida antarctica lipase under reduced pressure.

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1
Ecole Supérieure de Technologie des Biomolécules de Bordeaux, Université Victor Segalen Bordeaux2, 146 rue Léo Saignat, 33076 Bordeaux cedex, France.

Abstract

A single-step acylation of rutin and naringin, catalyzed by immobilized Candida antarctica lipase B in 2-methyl-2-butanol, occurred preferentially on the primary hydroxyl group. Using palmitic methyl ester as acyl donor, the acylation rate of naringin was 10-fold higher than that of rutin. Under optimal conditions, i.e. a molar ratio acyl donor/naringin of 7:1 and 200 mbar, 92% naringin was acylated.

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