Modifications of DPP-4 inhibitor 5, that was discovered by structure based design, are described and structure-activity relationships discussed. With analogue 7k one of the most potent non-covalent inhibitors of DPP-4 reported to date (IC(50)=0.38nM) was discovered. X-ray structure of inhibitor 7k bound to DPP-4 revealed a hydrogen bonding interaction with Q553. First successful efforts in balancing overall properties, as demonstrated by improved metabolic stability, highlight the potential of this series.
Nordhoff S, Cerezo-Galvez S, Deppe H, Hill O, Lopez-Canet M, Rummey C, Thiemann M, Matassa VG, Edwards PJ, Feurer A (2009) Discovery of beta-homophenylalanine based pyrrolidin-2-ylmethyl amides and sulfonamides as highly potent and selective inhibitors of dipeptidyl peptidase IV Bioorganic & Medicinal Chemistry Lett19: 4201-3
Nordhoff S, Cerezo-Galvez S, Deppe H, Hill O, Lopez-Canet M, Rummey C, Thiemann M, Matassa VG, Edwards PJ, Feurer A (2009) Bioorganic & Medicinal Chemistry Lett19: 4201-3