Identification of MK-5710 ((8aS)-8a-methyl-1,3-dioxo-2-[(1S,2R)-2-phenylcyclo- propyl]-N-(1-phenyl-1H-pyrazol-5-yl)hexahydro-imidazo[1,5-a]pyrazine-7(1H)-carboxamide), a potent smoothened antagonist for use in Hedgehog pathway dependent malignancies, part 2.

Autor: Kinzel O; IRBM, Merck Research Laboratories Rome, Rome, Italy., Alfieri A, Altamura S, Brunetti M, Bufali S, Colaceci F, Ferrigno F, Filocamo G, Fonsi M, Gallinari P, Malancona S, Hernando JI, Monteagudo E, Orsale MV, Palumbi MC, Pucci V, Rowley M, Sasso R, Scarpelli R, Steinkühler C, Jones P
Jazyk: angličtina
Zdroj: Bioorganic & medicinal chemistry letters [Bioorg Med Chem Lett] 2011 Aug 01; Vol. 21 (15), pp. 4429-35. Date of Electronic Publication: 2011 Jun 16.
DOI: 10.1016/j.bmcl.2011.06.023
Abstrakt: The Hedgehog (Hh-) signaling pathway is a key developmental pathway which gets reactivated in many human tumors, and smoothened (Smo) antagonists are emerging as novel agents for the treatment of malignancies dependent on the Hh-pathway, with the most advanced compounds demonstrating encouraging results in initial clinical trials. A novel series of potent bicyclic hydantoin Smo antagonists was reported in the preceding article, these have been resolved, and optimized to identify potent homochiral derivatives with clean off-target profiles and good pharmacokinetic properties in preclinical species. While showing in vivo efficacy in mouse allograft models, unsubstituted bicyclic tetrahydroimidazo[1,5-a]pyrazine-1,3(2H,5H)-diones were shown to epimerize in plasma. Alkylation of the C-8 position blocks this epimerization, resulting in the identification of MK-5710 (47) which was selected for further development.
(Copyright © 2011 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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