Synthesis and Crystal Structures of Substituted Benzenes and Benzoquinones as Tissue Factor VIIa Inhibitors
作者:John J. Parlow、Anna M. Stevens、Roderick A. Stegeman、William C. Stallings、Ravi G. Kurumbail、Michael S. South
DOI:10.1021/jm030233b
日期:2003.9.1
Several multistep syntheses of substituted benzenes are reported. The benzene analogues were designed such that their substitution pattern would occupy and interact with the S-1, S-2, and S-3 pockets of the tissue Factor VIIa enzyme. A variety of chemical transformations including nucleophilic additions, reductive aminations, Stille couplings, and polymer-assisted solution-phase (PASP) techniques were used to prepare key intermediates and final products. The initial analogues identified some weakly active compounds which ultimately led to a 340 nM (IC50) tissue Factor VIIa inhibitor with selectivity over other related enzymes. The structure-activity relationship of these inhibitors and the synthetic progression from the discovery of the lead compound to the development of potent analogues will be discussed. The X-ray crystal structures of fluorobenzene 50c and benzoquinone 54 inhibitors complexed with the TF/VIIa enzyme will also be described.