Flavonoids are a well-known subclass of phenolic compounds exhibiting a biological activity mainly based on their anti-oxidant properties. Bergenin is a trihydroxybenzoic acid glycoside derived from 4-methoxy gallic acid which presents anti-arthritic effect in addition to the anti-oxidant character (Nazir et al., 2007). A two-step enzymatic modification of solid-supported bergenin followed by cleavage from the support by the action of a lipase has been reported (Akbar et al., 2009). A first step of bromination by a chloroperoxidase in the presence of NaBr was followed by an acylation step with vinyl butyrate in the presence of subtilisine Carlsberg. The modified bergenin was then released from the controlled pore glass by lipase-catalysed cleavage of the ester bond connecting the product with the support.