Abstract
A preparative-scale enantioselective hydrolysis of racemic methyl esters of several N-protected amino acid has been carried out by using crude porcine pancreatic lipase (Triacylglycerol lipase, EC 3.1.1.3) PPL as a hydrolytic enzyme. In all cases 50% of the racemic methyl ester was hydrolysed to the N-protected L-amino acid with high yield and high optical purity.Hydrolysis rates were very close related not only to the amino acid structure but also to the steric and/or electronic nature of the ester and N-protecting groups. Thus, the very convenient ester methyl group can be enantioselectively hydrolysed with PPL when N-protecting group is a carbonyl derivative, as it is the usual benzoyl group.
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