在基于细胞的NF-κB萤光素酶报告基因分析中鉴定出一种新型的具有吡咯并[2,3- d ]嘧啶核的萤火虫萤光素酶抑制剂(3a)。它有效地抑制了源自Photinus pyralis的萤火虫荧光素酶,其IC 50值为0.36±0.05μM。对3a抑制的动力学分析表明,它相对于d-荧光素主要竞争,而相对于ATP不竞争。因此,制备了几种吡咯并[2,3- d ]嘧啶类似物以进一步研究荧光素酶抑制的构效关系(SAR)。该系列中最有效的抑制剂是4c,显示出IC50值为0.06±0.01μM。此外,分子对接研究表明3a和4c都可以容纳在d-荧光素结合袋中,这对于d-荧光素主要是竞争性抑制剂。
Discovery and hit-to-lead optimization of pyrrolopyrimidines as potent, state-dependent Nav1.7 antagonists
作者:Nagasree Chakka、Howie Bregman、Bingfan Du、Hanh Nho Nguyen、John L. Buchanan、Elma Feric、Joseph Ligutti、Dong Liu、Jeff S. McDermott、Anruo Zou、Stefan I. McDonough、Erin F. DiMauro
DOI:10.1016/j.bmcl.2012.01.015
日期:2012.3
Herein we describe the discovery, optimization, and structure-activity relationships of novel potent pyrrolopyrimidine Na(v)1.7 antagonists. Hit-to-lead SAR studies of the pyrrolopyrimidine core, head, and tail groups of the molecule led to the identification of pyrrolopyrimidine 48 as exceptionally potent Na(v)1.7 blocker with good selectivity over hERG and improved microsomal stability relative to our hit molecule and pyrazolopyrimidine 8 as a promising starting point for future optimization efforts. Published by Elsevier Ltd.