摘要:
Peptide-semicarbazones derived from Z-Trp-Trp-Phe-aldehyde inhibit the chymotryptic activity of the human proteasome at nanomolar concentrations, but are less active in a NF kappa B reporter gene assay. Cyclic semicarbazones, in contrast, combine a strong inhibitory effect on the enzyme with an inhibition of NF kappa B signaling in the nanomolar range. In addition, a practical synthesis for scale-up of such compounds was developed. (c) 2008 Elsevier Ltd. All rights reserved.