Download MendeleyStereochemical Differences in Fluorocyclopropyl Amides Enable Tuning of Btk Inhibition and Off-Target Activity.
Crawford, J.J., Lee, W., Johnson, A.R., Delatorre, K.J., Chen, J., Eigenbrot, C., Heidmann, J., Kakiuchi-Kiyota, S., Katewa, A., Kiefer, J.R., Liu, L., Lubach, J.W., Misner, D., Purkey, H., Reif, K., Vogt, J., Wong, H., Yu, C., Young, W.B.(2020) ACS Med Chem Lett 11: 1588-1597
- PubMed: 32832028
- DOI: https://doi.org/10.1021/acsmedchemlett.0c00249
- Primary Citation of Related Structures:
6XE4 - PubMed Abstract:
Bruton's tyrosine kinase (Btk) is thought to play a pathogenic role in chronic immune diseases such as rheumatoid arthritis and lupus. While covalent, irreversible Btk inhibitors are approved for treatment of hematologic malignancies, they are not approved for autoimmune indications. In efforts to develop additional series of reversible Btk inhibitors for chronic immune diseases, we sought to differentiate from our clinical stage inhibitor fenebrutinib using cyclopropyl amide isosteres of the 2-aminopyridyl group to occupy the flat, lipophilic H2 pocket. While drug-like properties were retained-and in some cases improved-a safety liability in the form of hERG inhibition was observed. When a fluorocyclopropyl amide was incorporated, Btk and off-target activity was found to be stereodependent and a lead compound was identified in the form of the ( R , R )- stereoisomer.
Organizational Affiliation:
Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States.
