Abstract

AbstractThe unfavorable reaction equilibrium of transaminase‐catalyzed reactions is a major challenge for the efficient biocatalytic synthesis of chiral amines. In this study the synthetic utilization of a salt‐based, continuous in situ‐product crystallization is described to overcome the thermodynamic limit in amine transaminase‐reactions using only the commonly used amine donor isopropylamine. The simultaneous dissolution of isopropylammonium 3,3‐diphenylpropionate (donor salt) in combination with the crystallization of the product salt facilitates a thermodynamic shift of the continuous amine transaminase‐catalyzed reaction. The main process necessity is a lower product salt solubility in comparison to the applied donor salt. This concept facilitates a stoichiometric use of isopropylamine in combination with a significantly lowered concentration of the amines in solution.magnified image

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