Synthesis and evaluation of unsaturated caprolactams as interleukin-1β converting enzyme (ICE) inhibitors
摘要:
Peptidomimetic compounds possessing a caprolactam ring constraint were prepared and evaluated as interleukin-1 beta converting enzyme (ICE) inhibitors. The caprolactam ring was used to constrain the P3 region of our inhibitors. This strategy proved to be effective for the synthesis of ICE inhibitors, maintaining key hydrogen bond interactions with the enzyme and invoking a preferred conformation for binding. Several compounds exhibited IC50 values less than 10 nM in a caspase-1 enzyme assay and less than 100 nM in a THP-1 whole cell assay measuring IL-1 beta production. Two compounds, 13c and 13j, were found to have good oral bioavailability (> 50%) in rats when administered as prodrugs. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of unsaturated caprolactams as interleukin-1β converting enzyme (ICE) inhibitors
作者:Yili Wang、Steven V. O’Neil、John A. Wos、Kofi A. Oppong、Michael C. Laufersweiler、David L. Soper、Christopher D. Ellis、Mark W. Baize、Amy N. Fancher、Wei Lu
DOI:10.1016/j.bmc.2006.11.011
日期:2007.2.1
Peptidomimetic compounds possessing a caprolactam ring constraint were prepared and evaluated as interleukin-1 beta converting enzyme (ICE) inhibitors. The caprolactam ring was used to constrain the P3 region of our inhibitors. This strategy proved to be effective for the synthesis of ICE inhibitors, maintaining key hydrogen bond interactions with the enzyme and invoking a preferred conformation for binding. Several compounds exhibited IC50 values less than 10 nM in a caspase-1 enzyme assay and less than 100 nM in a THP-1 whole cell assay measuring IL-1 beta production. Two compounds, 13c and 13j, were found to have good oral bioavailability (> 50%) in rats when administered as prodrugs. (c) 2006 Elsevier Ltd. All rights reserved.
A General Approach to Dehydro-Freidinger Lactams: Ex-Chiral Pool Synthesis and Spectroscopic Evaluation as Potential Reverse Turn Inducers
作者:Tobias Hoffmann、Reiner Waibel、Peter Gmeiner
DOI:10.1021/jo0261653
日期:2003.1.1
Starting from natural alpha-amino acids, a practical synthesis of the dehydro-Freidinger lactams 9a-h based on the ring-closing olefin metathesis reaction was investigated. The presented examples comprise 6-, 7-, 8-, 9-, and 10-membered cyclic dipeptide mimics. Structural variations were demonstrated. We approached the metathesis precursors 8a-h employing an N-alkylation/peptide-coupling strategy.