New Tripeptide-Based Macrocyclic Calpain Inhibitors Formed by<i>N</i>-Alkylation of Histidine
作者:Hongyuan Chen、Wanting Jiao、Matthew A. Jones、James M. Coxon、James D. Morton、Roy Bickerstaffe、Ashok D. Pehere、Ondrej Zvarec、Andrew D. Abell
DOI:10.1002/cbdv.201200320
日期:2012.11
Two new series of 15-membered macrocyclic peptidomimetics, in which the P1 and P3 residues of the peptide backbone are linked by a bridge containing a 1,4-disubstituted 1H-imidazole, are reported. The structure with an aldehyde at the C-terminus and the imidazole at P3, i.e., 4c, shows significant inhibitory activity against calpain 2, with an IC(50) value of 238 nM. The macrocyclic aldehyde with the