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Formula | C15H14N2O |
Molar mass | 238.290 g·mol−1 |
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Semaxanib (INN,[1] codenamed SU5416) is a tyrosine-kinase inhibitor drug designed by SUGEN as a cancer therapeutic. It is an experimental stage drug, not licensed for use on human patients outside clinical trials. Semaxanib is a potent and selective synthetic inhibitor of the Flk-1/KDR vascular endothelial growth factor (VEGF) receptor tyrosine kinase. It targets the VEGF pathway, and both in vivo and in vitro studies have demonstrated antiangiogenic potential.[citation needed]
In February 2002, Pharmacia, the then-parent of Sugen, prematurely ended phase III clinical trials of semaxinib in the treatment of advanced colorectal cancer due to discouraging results.[2] Other studies, at earlier phases, have since been conducted.[3][4] However, due to the prospect of next-generation tyrosine kinase inhibitors and the inefficacy of semaxanib in clinic trials, further development of the drug has been discontinued.[5] A related compound, SU11248 (sunitinib), was further developed by Sugen and subsequently by Pfizer, and received FDA approval for treatment of renal carcinoma in January 2006.[6]
When combined with chronic exposure to hypoxia, SU5416 induces severe pulmonary hypertensioninmice and rats. This property has been exploited to develop a series of useful, though controversial, rodent models of pulmonary arterial hypertension, the first and best characterized being the Sugen/Hypoxia (SuHx) mouse model.[7][8]
The Vilsmeier–Haack reaction on 2,4-dimethylpyrrole [625-82-1] (1) affords 3,5-dimethylpyrrole-2-carboxaldehyde [2199-58-8] (2). Knoevenagel condensation of this intermediate with oxindole [59-48-3] (3) in the presence of base affords semaxanib (4).
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