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Bioorg Med Chem Lett. 2009 Sep 1;19(17):5158-61. doi: 10.1016/j.bmcl.2009.07.016. Epub 2009 Jul 9.

2-Aminobenzimidazoles as potent Aurora kinase inhibitors.

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Sunesis Pharmaceuticals, Inc., 395 Oyster Point Blvd., South San Francisco, CA 94080, USA.


This Letter describes the discovery and key structure-activity relationship (SAR) of a series of 2-aminobenzimidazoles as potent Aurora kinase inhibitors. 2-Aminobenzimidazole serves as a bioisostere of the biaryl urea residue of SNS-314 (1c), which is a potent Aurora kinase inhibitor and entered clinical testing in patients with solid tumors. Compared to SNS-314, this series of compounds offers better aqueous solubility while retaining comparable in vitro potency in biochemical and cell-based assays; in particular, 6m has also demonstrated a comparable mouse iv PK profile to SNS-314.

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