Scalable synthesis and structural characterization of reversible KLK6 inhibitors

Scalable asymmetric syntheses of two kallikrein-related protease 6 (KLK6) inhibitors are reported. The inhibitors are assembled by linking enantiomerically enriched fragments via amide bond formation, followed by conversion of a cyano group to an amidine. One fragment, an amine, was prepared using t...

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Bibliographic Details
Published in:RSC advances 2022-09, Vol.12 (41), p.26989-26993
Main Authors: Baumann, Andreas, Isak, Daniel, Lohbeck, Jasmin, Jagtap, Pravin Kumar Ankush, Hennig, Janosch, Miller, Aubry K
Format: Article
Language:English
Subjects:
Chemistry
Crystallography
Cyano groups
Protease inhibitors
Structural analysis
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Summary:Scalable asymmetric syntheses of two kallikrein-related protease 6 (KLK6) inhibitors are reported. The inhibitors are assembled by linking enantiomerically enriched fragments via amide bond formation, followed by conversion of a cyano group to an amidine. One fragment, an amine, was prepared using the Ellman auxiliary, and a lack of clarity in the literature regarding the stereochemical outcome of this reaction was solved via X-ray crystallographic analysis of two derivatives. Complexes of the inhibitors bound to human KLK6 were solved by X-ray crystallography, revealing the binding poses. We report scalable syntheses of two potent and selective kallikrein related peptidase 6 (KLK6) inhibitors, as well as X-ray crystal structures of both inhibitors as protein-ligand complexes.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra04670a