Potent, nonpeptide inhibitors of human mast cell tryptase. Synthesis and biological evaluation of novel spirocyclic piperidine amide derivatives.
Costanzo MJ, Yabut SC, Zhang HC, White KB, de Garavilla L, Wang Y, Minor LK, Tounge BA, Barnakov AN, Lewandowski F, Milligan C, Spurlino JC, Abraham WM, Boswell-Smith V, Page CP, Maryanoff BE.
We have explored a series of spirocyclic piperidine amide derivatives (5) as tryptase inhibitors. Thus, 4 (JNJ-27390467) was identified as a potent, selective tryptase inhibitor with oral efficacy in two animal models of airway inflammation (sheep and guinea pig asthma models). An X-ray co-crystal structure of 4 x tryptase revealed a hydrophobic pocket in the enzyme's active site, which is induced by the phenylethynyl group and is comprised of amino acid residues from two different monomers of the tetrameric protein.