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Membrane contactor for chiral amine synthesis and separation

Chiral amines are key building blocks for many new pharmaceuticals (APIs). The bulk of medicines currently produced are made of chiral compounds. In origin, most chiral compounds are available as mixtures of two equimolar enantiomers (i.e. molecules that are mirror images of one another); exhibiting marked differences in activities (e.g. toxicology, pharmacology,) while being structurally the same. The functional difference of the enantiomers thus determines their usability in medical, agrochemical and chemical product synthesis and their separation is therefore of great added value. The application of chiral preparations has a much higher success if the unwanted enantiomer is not present.

Enantiomeric separation is a challenge as it requires advanced verification to confirm the desired product.

An enzymatic approach, however, using transaminase, appears to lead to successfully controlled asymmetric production of chiral amines. But despite the advantages of high selectivity, the transamination reaction is a reversible reaction, often with an unfavourable thermodynamic equilibrium which limits obtaining high chiral amine yields.

VITO solution

VITO developed an enzymatic transamination process allowing the synthesis and separation of chiral amines at an industrial scale.

An innovative membrane contactor setup allows a transaminase catalysed reaction between a donor amine and acceptor ketone in combination with a hydrophobic membrane based separation of the produced chiral amine. This way, a large scale chiral amine synthesis, separation and enrichment is achievable.

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