Discovery of 4-Aryl-<i>N</i>-arylcarbonyl-2-aminothiazoles as Hec1/Nek2 Inhibitors. Part I: Optimization of in Vitro Potencies and Pharmacokinetic Properties
作者:Ying-Shuan E. Lee、Shih-Hsien Chuang、Lynn Y. L. Huang、Chun-Liang Lai、Yu-Hsiang Lin、Ju-Ying Yang、Chia-Wei Liu、Sheng-chuan Yang、Her-Sheng Lin、Chia-chi Chang、Jun-Yu Lai、Pei-Shiou Jian、King Lam、Jia-Ming Chang、Johnson Y. N. Lau、Jiann-Jyh Huang
DOI:10.1021/jm401990s
日期:2014.5.22
A series of 4-aryl-N-arylcarbonyl-2-aminothiazoles of scaffold 4 was designed and synthesized as Hec1/Nek2 inhibitors. Structural optimization of 4 led to compound S 32 bearing C-4' 4-methoxyphenoxy and 4-(o-fluoropyridyl)-carbonyl groups that showed low nanomolar in vitro antiproliferative activity (IC50: 16.3-42.7 nM), high intravenous AUC (64.9 mu M.h, 2.0 mg/kg) in SD rats, and significant in vivo antitumor activity (T/C = 32%, 20 mg/kg, IV) in mice bearing human MDA-MB-231 xenografts. Cell responses resulting from Hec1/Nek2 inhibition were observed in cells treated with 32, including a reduced level of Hec1 coimmunoprecipitated with Nek2, degradation of Nek2, mitotic abnormalities, and apoptosis. Compound 32 showed selectivity toward cancer cells over normal phenotype cells and was inactive in a [H-3]astemizole competitive binding assay for hERG liability screening. Therefore, 32 is as a good lead toward the discovery of a preclinical candidate targeting Hec1/Nek2 interaction.