The syntheses of potent small molecule inhibitors of the CDK2/cyclinA recruitment site are described. Structure-activity trends of nanomolar octapeptides were examined through amino-acid substitution and truncation of the sequence resulting in the identification of a smaller, albeit significantly less potent, tetrapeptide lead. These losses in affinity were recovered by side-chain optimization and by rigidification of the peptide backbone using a combination of solid-phase parallel synthesis and structure-based design. Finally, two guanidine functionalities were replaced to improve drug-like properties, resulting in neutral small molecules equal in activity to that of the peptide lead. (C) 2005 Elsevier Ltd. All rights reserved.
Proton Magnetic Resonance Spectra, Stereochemistry, and Synthesis of 2-(Chlorophenyl)cyclohexanols<sup>1</sup>
作者:ALAIN C. HUITRIC、WILLIAM G. CLARKE、KAREN LEIGH、DONALD C. STAIFF