Structural Optimization and Structure–Activity Relationships of <i>N</i><sup>2</sup>-(4-(4-Methylpiperazin-1-yl)phenyl)-<i>N</i><sup>8</sup>-phenyl-9<i>H</i>-purine-2,8-diamine Derivatives, a New Class of Reversible Kinase Inhibitors Targeting both EGFR-Activating and Resistance Mutations
作者:Jiao Yang、Li-Jiao Wang、Jing-Jing Liu、Lei Zhong、Ren-Lin Zheng、Yong Xu、Pan Ji、Chun-Hui Zhang、Wen-Jing Wang、Xing-Dong Lin、Lin-Li Li、Yu-Quan Wei、Sheng-Yong Yang
DOI:10.1021/jm301365e
日期:2012.12.13
This paper describe the structural optimization of a hit compound, N-2-(4-(4-methylpiperazin-1-yl)phenyl)-N-8-phenyl-9H-purine-2,8-diamine (1), which is a reversible kinase inhibitor targeting both EGFR-activating and drug-resistance (T790M) mutations but has poor binding affinity. Structure-activity relationship studies led to the identification of 9-cyclopentyl-N-2-(4-(4-methylpiperazin-1-yl)phenyl)-N-8-phenyl-9H-purine-2,8-diamine (9e) that exhibits significant in vitro antitumor potency against the non-small-cell lung cancer (NSCLC) cell lines HCC827 and H1975, which harbor EGFR-activating and drug-resistance mutations, respectively. Compound 9e was further assessed for potency and selectivity in enzymatic assays and in vivo anti-NSCLC studies. The results indicated that compound 9e is a highly potent kinase inhibitor against both EGFR-activating and resistance mutations and has good kinase spectrum selectivity across the kinome. In vivo, oral administration of compound 9e at a dose of 5 mg/kg caused rapid and complete tumor regression in a HCC827 xenograft model, and an oral dose of 50 mg/kg initiated a considerable antitumor effect in an H1975 xenograft model.