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Papain-catalysed mechanochemical synthesis of oligopeptides by milling and twin-screw extrusion; application in the Juliá-Colonna enantioselective epoxidation

Abstract

The oligomerisation of L-amino acids by papain was studied in a mixer ball mill and in a planetary ball mill. The biocatalyst proved stable under the ball milling conditions providing the corresponding oligopeptides in good to excellent yields and with a variable degree of polymerisation. Both parameters were found to be dependent on the reaction conditions and on the nature of the amino acid (specifically its side-chain size and hydrophobicity). In addition, the chemoenzymatic oligomerisation was demonstrated utilising twin-screw extrusion technology, which allowed for a scalable continuous process. Finally, the synthesised oligo(L-Leu) 2b proved to be active as a catalyst in the Juliá-Colonna enantioselective epoxidation of chalcone derivatives.

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Publication details

The article was received on 24 Oct 2017, accepted on 09 Jan 2018 and first published on 09 Jan 2018


Article type: Paper
DOI: 10.1039/C7GC03205F
Citation: Green Chem., 2018, Accepted Manuscript
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    Papain-catalysed mechanochemical synthesis of oligopeptides by milling and twin-screw extrusion; application in the Juliá-Colonna enantioselective epoxidation

    K. J. Ardila-Fierro, D. Crawford, A. Körner, S. James, C. Bolm and J. G. Hernández, Green Chem., 2018, Accepted Manuscript , DOI: 10.1039/C7GC03205F

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