Discovery of an l-alanine ester prodrug of the Hsp90 inhibitor, MPC-3100
摘要:
Various types of Hsp90 inhibitors have been and continue to undergo clinical investigation. One development candidate is the purine-based, synthetic Hsp90 inhibitor 1 (MPC-3100), which successfully completed a phase I clinical study. However, further clinical development of 1 was hindered by poor solubility and consequent formulation issues and promoted development of a more water soluble prodrug. Towards this end, numerous pro-moieties were explored in vitro and in vivo. These studies resulted in identification of L-alanine ester mesylate, 2i (MPC-0767), which exhibited improved aqueous solubility, adequate chemical stability, and rapid bioconversion without the need for solubilizing excipients. Based on improved physical characteristics and favorable PK and PD profiles, 2i mesylate was selected for further development. A convergent, scalable, chromatography-free synthesis for 2i mesylate was developed to support further clinical evaluation. (C) 2015 Elsevier Ltd. All rights reserved.
作者:Pradeep K. Singh、Hao Fan、Xiuju Jiang、Lei Shi、Carl F. Nathan、Gang Lin
DOI:10.1002/cmdc.201600384
日期:2016.10.6
noncovalent proteasomeinhibitors. Herein we report that the insertion of a β‐amino acid into N,C‐capped dipeptides markedly decreases their inhibitory potency against human constitutive proteasomeβ5c, while maintaining potent inhibitory activity against human immunoproteasome β5i, thereby achieving thousands‐fold selectivity for β5i over β5c. Structure–activity relationship studies revealed that β5c does
Practical synthesis of fully-substituted peptide thiazoles
作者:John L. Buchanan、Ukti N. Mani、Hilary R. Plake、Dennis A. Holt
DOI:10.1016/s0040-4039(99)00659-0
日期:1999.5
5-substituted 1,3-thiazoles (peptide thiazoles) is described. Both the chirality and the set of side chain functionality in this fully-substituted scaffold are derived from a combination of two amino acids and one organometallic reagent. Preliminary results, with two specific examples, highlight the potential of this strategy for the preparation of a diverse set of buildingblocks.