Trisubstituted Imidazoles with a Rigidized Hinge Binding Motif Act As Single Digit nM Inhibitors of Clinically Relevant EGFR L858R/T790M and L858R/T790M/C797S Mutants: An Example of Target Hopping,Journal of Medicinal Chemistry

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Trisubstituted Imidazoles with a Rigidized Hinge Binding Motif Act As Single Digit nM Inhibitors of Clinically Relevant EGFR L858R/T790M and L858R/T790M/C797S Mutants: An Example of Target Hopping
Journal of Medicinal Chemistry ( IF 6.8 ) Pub Date : 2017-05-08 00:00:00 , DOI: 10.1021/acs.jmedchem.7b00178
Michael Juchum ₁ , Marcel Günther ₁ , Eva Döring ₁ , Adrian Sievers-Engler ₁ , Michael Lämmerhofer ₁ , Stefan Laufer ₁

Affiliation

The high genomic instability of non-small cell lung cancer tumors leads to the rapid development of resistance against promising EGFR tyrosine kinase inhibitors (TKIs). A recently detected triple mutation compromises the activity of the gold standard third-generation EGFR inhibitors. We have prepared a set of trisubstituted imidazoles with a rigidized 7-azaindole hinge binding motif as a new structural class of EGFR inhibitors by a target hopping approach from p38α MAPK inhibitor templates. On the basis of an iterative approach of docking, compound preparation, biological testing, and SAR interpretation, robust and flexible synthetic routes were established. As a result, we report two reversible inhibitors 11d and 11e of the clinically challenging triple mutant L858R/T790M/C797S with IC₅₀ values in the low nanomolar range. Furthermore, we developed a kinome selective irreversible inhibitor 45a with an IC₅₀ value of 1 nM against the EGFR L858R/T790M double mutant. Target binding kinetics and metabolic stability data are included. These potent mutant EGFR inhibitors may serve as a basis for the development of structurally novel EGFR probes, tools, or candidates.

中文翻译：

具有刚性铰链结合基序的三取代咪唑可作为临床相关EGFR L858R / T790M和L858R / T790M / C797S突变体的一位数nM抑制剂：目标跳跃的一个例子

非小细胞肺癌肿瘤的高基因组不稳定性导致对有前途的EGFR酪氨酸激酶抑制剂（TKIs）的耐药性迅速发展。最近检测到的三重突变损害了金标准的第三代EGFR抑制剂的活性。我们通过p38αMAPK抑制剂模板的靶标跳跃方法制备了一组具有刚性7-氮杂吲哚铰链结合基序的三取代咪唑，作为EGFR抑制剂的新结构类。在对接，化合物制备，生物学测试和SAR解释的迭代方法的基础上，建立了稳健而灵活的合成路线。结果，我们报告了两种可逆抑制剂11d和11e具有临床挑战性的三重突变体L858R / T790M / C797S的IC ₅₀值在低纳摩尔范围内。此外，我们开发了一种激酶组选择性的不可逆抑制剂45A具有IC ₅₀为1nM的针对EGFR L858R / T790M双突变体的值。包括靶结合动力学和代谢稳定性数据。这些有效的突变EGFR抑制剂可作为开发结构新颖的EGFR探针，工具或候选物的基础。

更新日期：2017-05-24

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