A Useful Methodology for the Synthesis of 2-Methyl-4-nitrobenzimidazoles
作者:Wei Tian、Spiros Grivas
DOI:10.1055/s-1992-26359
日期:——
Cyclocondensation of 3-nitro-1,2-benzenediamines 2 with 2,4-pentanedione provides a convenient route for the preparation of 2-methyl-4-nitrobenzimidazoles 3. A discrepancy in the literature regarding the 5-chloro-, 5-methoxy- and 5-methyl derivatives of the title compounds is discussed.
7-Aminopyrazolo[1,5-<i>a</i>]pyrimidines as Potent Multitargeted Receptor Tyrosine Kinase Inhibitors
作者:Robin R. Frey、Michael L. Curtin、Daniel H. Albert、Keith B. Glaser、Lori J. Pease、Niru B. Soni、Jennifer J. Bouska、David Reuter、Kent D. Stewart、Patrick Marcotte、Gail Bukofzer、Junling Li、Steven K. Davidsen、Michael R. Michaelides
DOI:10.1021/jm701397k
日期:2008.7
7-Aminopyrazolo[1,5-a]pyrimidine urea receptor tyrosine kinase inhibitors have been discovered. Investigation of structure-activity relationships of the pyrazolo[1,5-a]pyrimidine nucleus led to a series of 6-(4-N,N'-diphenyl)ureas that potently inhibited a panel of vascular endothelial growth factor receptor (VEGFR) and platelet-derived growth factor receptor (PDGFR) kinases. Several of these compounds, such as 34a, are potent inhibitors of kinase insert domain-containing receptor tyrosine kinase (KDR) both enzymatically (< 10 nM) and cellularly (< 10 nM). In addition, compound 34a possesses a favorable pharmacokinetic profile and demonstrates efficacy in the estradiol-induced murine uterine edema (UE) model (ED(50) = 1.4 mg/kg).
Dobrodei; El'tsov, Russian Journal of General Chemistry, 2000, vol. 70, # 1, p. 158 - 159