Discovery of benzothiazole guanidines as novel inhibitors of thrombin and trypsin IV
作者:Michael Karle、Wolfgang Knecht、Yafeng Xue
DOI:10.1016/j.bmcl.2012.05.046
日期:2012.7
In a project to find novel neutral P1 fragments for the synthesis of thrombin inhibitors with improved pharmacokinetic properties, fragments containing a benzothiazole guanidine scaffold were identified as weak thrombin inhibitors. WaterLOGSY (Water-Ligand Observed via Gradient SpectroscopY) NMR was used to detect fragments binding to thrombin and these fragments were followed up by Biacore A100 affinity
在寻找新的中性P1片段以合成具有改善的药代动力学特性的凝血酶抑制剂的项目中,将含有苯并噻唑胍支架的片段鉴定为弱凝血酶抑制剂。使用WaterLOGSY(通过梯度光谱法观察到的水配体)NMR检测与凝血酶结合的片段,并通过Biacore A100亲和力测量和酶测定法对这些片段进行跟踪。获得了与凝血酶最有效的化合物的晶体结构,并揭示了意想不到的结合模式以及片段与蛋白质的关键相互作用。基于这些结果,进行了一系列基于结构的设计和合成,这些小系列优化产品的p K a值较低,它们是新颖的新型取代的苯并噻唑胍。价值实现了。对这些化合物针对人胰蛋白酶I和人胰蛋白酶IV的测试显示出某些化合物具有意想不到的抑制活性和选择性,这使其成为选择性胰蛋白酶抑制剂的有吸引力的起点。