Self-sustaining closed-loop multienzyme-mediated conversion of amines into alcohols in continuous reactions
Martina L. Contente, Francesca Paradisi
- School of Chemistry, University of Nottingham, Nottingham, United Kingdom
Read the publication that featured this abstractThe synthesis of alcohols from amine starting materials is an excellent yet challenging strategy for the preparation of pharmaceuticals and polymers. Here we developed a versatile, self-sustaining closed-loop multienzymatic platform for the biocatalytic synthesis of a large range of non-commercially available products in a continuous flow with excellent yields (80 to >99%), reaction times and optical purity of secondary alcohols (>99 enantiomeric excess). This process was also extended to the conversion of biogenic amines into high-value alcohols, such as the powerful antioxidant hydroxytyrosol, and the synthesis of enantiopure 2-arylpropanols via the dynamic kinetic resolution of commercially affordable racemic amines. The system exploits the in situ immobilization of transaminases and redox enzymes which were combined to cater for a fully automated, ultra-efficient synthetic platform with cofactor recycling, in-line recovery of benign by-products and recirculation of the aqueous media that contains the recycled cofactors in catalytic amounts, which increases the efficiency of the system by over 20-fold.
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