Pyridyl-pyrimidine benzimidazole derivatives as potent, selective, and orally bioavailable inhibitors of Tie-2 kinase
摘要:
Selective small molecule inhibitors of Tie-2 kinase are important tools for the validation of Tie-2 signaling in pathological angiogenesis. Reported herein is the optimization of a nonselective scaffold into a potent and highly selective inhibitor of Tie-2 kinase.
Discovery of a Potent, Selective, and Orally Bioavailable Pyridinyl-Pyrimidine Phthalazine Aurora Kinase Inhibitor
摘要:
The discovery of aurora kinases as essential regulators of cell division has led to intense interest in identifying small molecule aurora kinase inhibitors for the potential treatment of cancer. A high-throughput screening effort identified pyridinyl-pyrimidine 6a as a moderately potent dual inhibitor of aurora kinases -A and -B. Optimization of this hit resulted in an anthranilamide lead (6j) that possessed improved enzyme and cellular activity and exhibited a high level of kinase selectivity. However, this anthranilamide and subsequent analogues suffered from a lack of oral bioavailability. Converting the internally hydrogen-bonded six-membered pseudo-ring of the anthranilamide to a phthalazine (8a-b) led to a dramatic improvement in oral bioavailability (38-61%F) while maintaining the potency and selectivity characteristics of the anthranilamide series. In a COLO 205 tumor pharmacodynamic assay measuring phosphorylation of the aurora-B substrate histone H3 at serine 10 (p-histone H3), oral administration of 86 at 50 mg/kg demonstrated significant reduction in tumor p-histone H3 for at least 6 h.
Pyridyl-pyrimidine benzimidazole derivatives as potent, selective, and orally bioavailable inhibitors of Tie-2 kinase
作者:Victor J. Cee、Alan C. Cheng、Karina Romero、Steve Bellon、Christopher Mohr、Douglas A. Whittington、Annette Bak、James Bready、Sean Caenepeel、Angela Coxon、Holly L. Deak、Jenne Fretland、Yan Gu、Brian L. Hodous、Xin Huang、Joseph L. Kim、Jasmine Lin、Alexander M. Long、Hanh Nguyen、Philip R. Olivieri、Vinod F. Patel、Ling Wang、Yihong Zhou、Paul Hughes、Stephanie Geuns-Meyer
DOI:10.1016/j.bmcl.2008.11.056
日期:2009.1
Selective small molecule inhibitors of Tie-2 kinase are important tools for the validation of Tie-2 signaling in pathological angiogenesis. Reported herein is the optimization of a nonselective scaffold into a potent and highly selective inhibitor of Tie-2 kinase.
Discovery of a Potent, Selective, and Orally Bioavailable Pyridinyl-Pyrimidine Phthalazine Aurora Kinase Inhibitor
作者:Victor J. Cee、Laurie B. Schenkel、Brian L. Hodous、Holly L. Deak、Hanh N. Nguyen、Philip R. Olivieri、Karina Romero、Annette Bak、Xuhai Be、Steve Bellon、Tammy L. Bush、Alan C. Cheng、Grace Chung、Steve Coats、Patrick M. Eden、Kelly Hanestad、Paul L. Gallant、Yan Gu、Xin Huang、Richard L. Kendall、Min-Hwa Jasmine Lin、Michael J. Morrison、Vinod F. Patel、Robert Radinsky、Paul E. Rose、Sandra Ross、Ji-Rong Sun、Jin Tang、Huilin Zhao、Marc Payton、Stephanie D. Geuns-Meyer
DOI:10.1021/jm100394y
日期:2010.9.9
The discovery of aurora kinases as essential regulators of cell division has led to intense interest in identifying small molecule aurora kinase inhibitors for the potential treatment of cancer. A high-throughput screening effort identified pyridinyl-pyrimidine 6a as a moderately potent dual inhibitor of aurora kinases -A and -B. Optimization of this hit resulted in an anthranilamide lead (6j) that possessed improved enzyme and cellular activity and exhibited a high level of kinase selectivity. However, this anthranilamide and subsequent analogues suffered from a lack of oral bioavailability. Converting the internally hydrogen-bonded six-membered pseudo-ring of the anthranilamide to a phthalazine (8a-b) led to a dramatic improvement in oral bioavailability (38-61%F) while maintaining the potency and selectivity characteristics of the anthranilamide series. In a COLO 205 tumor pharmacodynamic assay measuring phosphorylation of the aurora-B substrate histone H3 at serine 10 (p-histone H3), oral administration of 86 at 50 mg/kg demonstrated significant reduction in tumor p-histone H3 for at least 6 h.