Optimization of a series of highly potent and kinome selective carbon-linked carboxamide spleen tyrosine kinase (Syk) inhibitors with favorable drug-like properties is described. A pervasive Ames liability in an analogous nitrogen-linked carboxamide series was obviated by replacement with a carbon-linked moiety. Initial efforts lacked on-target potency, likely due to strain induced between the hinge
描述了一系列具有良好的类药物特性的高效,高能动性选择性碳连接羧酰胺脾
酪氨酸激酶(Syk)
抑制剂的优化方法。通过用碳连接的部分取代,避免了类似的氮连接的羧酰胺系列中普遍的艾姆斯(Ames)责任。最初的努力缺乏对目标的效力,这可能是由于铰链结合酰胺和溶剂前沿杂环之间诱导的应变所致。考虑到基态和键态能级可以快速实现改进的溶剂前沿取代基,从而提供亚纳摩尔的Syk效力和高的kinome选择性。通过使用TA97a沙门氏菌菌株的Ames试验评估,这些分子也没有致突变性风险。