Abstract
Candida antarctica lipase A (CAL-A) selectively catalyzes the acylation at the secondary C-4 hydroxyl group of methyl shikimate (2), which possesses three secondary hydroxyl groups, the C-3 allylic one being chemically more reactive. The effect both of the acyl group of the acylating agents and of the solvent polarity has been studied. The selectivity of CAL-A is almost complete with acyl donors that possess short chains. However, when acyl donors have longer chains, better results are obtained by C. antarctica lipase B (CAL-B).
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