Discovery and optimization of aminopyrimidinones as potent and state-dependent Nav1.7 antagonists
摘要:
Clinical genetic data have shown that the product of the SCN9A gene, voltage-gated sodium ion channel Nav1.7, is a key control point for pain perception and a possible target for a next generation of analgesics. Sodium channels, however, historically have been difficult drug targets, and many of the existing structure-activity relationships (SAR) have been defined on pharmacologically modified channels with indirect reporter assays. Herein we describe the discovery, optimization, and SAR of potent aminopyrimidinone Nav1.7 antagonists using electrophysiology-based assays that measure the ligand-receptor interaction directly. Within this series, rapid functionalization at the polysubstituted aminopyrimidinone head group enabled exploration of SAR and of pharmacokinetic properties. Lead optimized N-Me-aminopyrimidinone 9 exhibited improved Nav1.7 potency, minimal off-target hERG liability, and improved rat PK properties. (C) 2011 Elsevier Ltd. All rights reserved.
Identification of novel, exosite-binding matrix metalloproteinase-13 inhibitor scaffolds
作者:Joshua Roth、Dmitriy Minond、Etzer Darout、Qin Liu、Janelle Lauer、Peter Hodder、Gregg B. Fields、William R. Roush
DOI:10.1016/j.bmcl.2011.09.077
日期:2011.12
Matrixmetalloproteinase-13 (MMP-13) has been implicated as the protease responsible for collagen degradation in cartilage during osteoarthritis (OA). Compounds that inhibit the metalloproteinase at the Zn binding site typically lack specificity among MMP family members. Analogs of the low-micromolar lead MMP-13 inhibitor 4, discovered through high-throughput screening, were synthesized to investigate
New isomeric 2-<i>ortho-(meta- and para-</i>) chloro-(bromo and nitro-)benzylthio-6-aminouracils
作者:Elżbieta Wyrzykiewicz、Anna Szponar
DOI:10.1002/jhet.5570380627
日期:2001.11
meta and para substituted derivatives of 2-benzylthio-6-aminouracils have been prepared. Electron Impact (EI) induced mass spectral fragmentation of these compounds was investigated. Fragmentation pathways are proposed on the basis of accurate mass and metastable transition measurements. The correlation between the intensities of the M+- and the selected fragment ions of these compounds is discussed
已经制备了十种新的2-苄硫基-6-氨基尿嘧啶的邻,间和对位取代的衍生物。电子冲击(EI)诱导了这些化合物的质谱裂解。在精确的质量和亚稳态跃迁测量的基础上提出了断裂途径。讨论了M + -的强度与这些化合物的选定碎片离子之间的相关性。获得的数据为确定异构体奠定了基础。这些化合物的1 H和13 C NMR光谱使用异核(HETCOR)光谱结合明确地分配了化学位移。从这些光谱得到的数据可用于区分异构体。