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Bioorg Med Chem Lett. 2008 Mar 15;18(6):1945-51. doi: 10.1016/j.bmcl.2008.01.121. Epub 2008 Feb 7.

Identification of pyrrolo[2,1-f][1,2,4]triazine-based inhibitors of Met kinase.

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Bristol-Myers Squibb Research and Development, PO Box 4000, Princeton, NJ 08543-4000, USA.


An amide library derived from the pyrrolo[2,1-f][1,2,4]triazine scaffold led to the identification of modest inhibitors of Met kinase activity. Introduction of polar side chains at C-6 of the pyrrolotriazine core provided significant improvements in in vitro potency. The amide moiety could be replaced with acylurea and malonamide substituents to give compounds with improved potency in the Met-driven GTL-16 human gastric carcinoma cell line. Acylurea pyrrolotriazines with substitution at C-5 demonstrated single digit nanomolar kinase activity. X-ray crystallography revealed that the C-5 substituted pyrrolotriazines bind to the Met kinase domain in an ATP-competitive manner.

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