Trans-fused 5-[(tert-Butoxtycarbonyl)amino]octahydroindenes as a protease activated receptor-1 (PAR1) antagonist
作者:Chul Min Park、Songhyun Baek、Seongwoo Kim、Jong-Hwan Song、Sunkyung Lee、Min Kim
DOI:10.1007/s12272-016-0788-7
日期:2016.9
Protease activated receptor 1 (PAR1) has been considered as a promising antiplatelet target to prevent thrombotic cardiovascular events in patients with prior myocardial infarction or peripheral arterial diseases. Previously, we found a series of octahydroindene analogues to have high potency on PAR1 and no significant cytotoxicity but poor metabolic stability in human and rat liver microsomes. We designed and synthesized substituted analogues of octahydroindenes at C5 or C6 aiming to improvement of metabolic stability, and identified that trans-fused 5-[(tert-butoxtycarbonyl)amino]octahydroindene analogues showed improved metabolic stability with maintaining good activity on PAR1. Especially, 2-methanesulfonate 57 (IC50 = 0.006 μM; R50 = 126.3 min in human, 83.3 min in rat), sulfamate 58 (IC50 = 0.020 μM; R50 = 52.8 min in human, 106.0 min in rat), and N-(cyclopropyl)methylsufonamide 63 (IC50 = 0.010 μM; R50 = 51.4 min in human, 90.5 min in rat) exhibited excellent activity and metabolic stability both on human and rat liver microsomes, comparable to those obtained for varapaxar (IC50 = 0.0015 μM; R50 = 83.2 min in human, 32.4 min in rat). Additionally, these compounds (57, 58, and 63) represented significant efficacy (IC50 = 0.0022, 0.0062, and 0.015 μM, each) in human washed platelet aggregation (WPA) assay without cytotoxicity and CYP3A4 inhibitory activity.
蛋白酶激活受体1(PAR1)被认为是预防既往心肌梗死或外周动脉疾病患者发生血栓性心血管事件的有前景的抗血小板靶点。之前,我们发现一系列八氢茚类化合物对PAR1具有高效能且没有明显的细胞毒性,但在人体和大鼠肝微粒体中代谢稳定性差。我们设计并合成了C5或C6位置的取代八氢茚类化合物,旨在提高代谢稳定性,并确认了反式融合的5-[(叔丁氧基碳酰)氨基]八氢茚类化合物在保持良好PAR1活性的同时,显示出改善的代谢稳定性。特别是,2-甲基磺酸酯57(IC50 = 0.006 μM;R50 = 126.3分钟(人)和83.3分钟(大鼠))、磺酰胺58(IC50 = 0.020 μM;R50 = 52.8分钟(人)和106.0分钟(大鼠))、以及N-(环丙基)甲基磺酰胺63(IC50 = 0.010 μM;R50 = 51.4分钟(人)和90.5分钟(大鼠))在人体和大鼠肝微粒体中均表现出优异的活性和代谢稳定性,其效果可与varapaxar(IC50 = 0.0015 μM;R50 = 83.2分钟(人)和32.4分钟(大鼠))相媲美。此外,这些化合物(57、58和63)在人体洗涤血小板聚集(WPA)实验中展现了显著的效能(IC50 = 0.0022、0.0062和0.015 μM,各自)且没有细胞毒性和CYP3A4抑制活性。