Polyamino acids

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Abstract
Enzymes are among the most versatile catalysts for asymmetric synthesis concerning enantio- and substrate-selectivity. Polymers of simple amino acids are a first step towards the application of more comples synthetic polypeptide structures. Due to their insolubility, these catalysts can be efficiently removed and reused. The Juliá-Colonna epoxidation provided the first highly enantioselective catalytic reaction using a polyamino acid as source of chirality. Recently, Roberts et al. replaced the original three-phase system comprising alkaline aqueous hydrogen peroxide by a non-aqueous two-phase system.

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