Disubstituted Indazoles as Potent Antagonists of the Integrin α<sub>v</sub>β<sub>3</sub>
作者:Douglas G. Batt、Joseph J. Petraitis、Gregory C. Houghton、Dilip P. Modi、Gary A. Cain、Martha H. Corjay、Shaker A. Mousa、Peter J. Bouchard、Mark S. Forsythe、Patricia P. Harlow、Frank A. Barbera、Susan M. Spitz、Ruth R. Wexler、Prabhakar K. Jadhav
DOI:10.1021/jm990049j
日期:2000.1.1
A new series of indazole-containing alpha(v)beta(3) integrin antagonists is described. Starting with lead compound 18a, variations in a number of structural features were explored with respect to inhibition of the binding of beta(3)-transfected 293 cells to fibrinogen and to selectivity for alpha(v)beta(3) over GPIIbIIIa, another RGD-binding integrin. Indazoles attached to a 2-aminopyridine or 2-aminoimidazole by a propylene linker at the indazole 1-position and to a diaminopropionate derivative via a 5-carboxylate amide provided the best potency with moderate selectivity. Several differences in the SAR of the diaminopropionate moiety were observed between this series and a series of isoxazoline-based selective GPIIbIIIa antagonists. Compound 34a (SM256) was a potent antagonist of alpha(v)beta(3) (IC50 2.3 nM) with 9-fold selectivity over GPIIbIIIa.