Design and Validation of Bicyclic Iminopyrimidinones As Beta Amyloid Cleaving Enzyme-1 (BACE1) Inhibitors: Conformational Constraint to Favor a Bioactive Conformation
作者:Mihirbaran Mandal、Zhaoning Zhu、Jared N. Cumming、Xiaoxiang Liu、Corey Strickland、Robert D. Mazzola、John P. Caldwell、Prescott Leach、Michael Grzelak、Lynn Hyde、Qi Zhang、Giuseppe Terracina、Lili Zhang、Xia Chen、Reshma Kuvelkar、Matthew E. Kennedy、Leonard Favreau、Kathleen Cox、Peter Orth、Alexei Buevich、Johannes Voigt、Hongwu Wang、Irina Kazakevich、Brian A. McKittrick、William Greenlee、Eric M. Parker、Andrew W. Stamford
DOI:10.1021/jm301039c
日期:2012.11.8
subsites of BACE1, we have designed a novel fused bicyclic iminopyrimidinone scaffold intended to favor this bioactive conformation. Strategic incorporation of a nitrogen atom in the new constrained ring allowed us to develop SAR around the S2′ binding pocket and ultimately resulted in analogues with low nanomolar potency for BACE1. In particular, optimization of the prime side substituent led to major
根据我们的观察,亚氨基嘧啶酮7的联芳基取代基由于必须处于假轴构象以占据BACE1的连续S1-S3亚位点,我们设计了一种新颖的稠合双环亚氨基嘧啶酮支架,旨在促进这种生物活性构象。在新的受限环中战略性地引入氮原子使我们能够在S2'结合口袋周围发展SAR,并最终导致BACE1的纳摩尔浓度低的类似物。尤其是,通过从两个接近S2'的区域置换两个保守的水分子,优化了素侧取代基导致了效能的重大提高。进一步优化此稠合吡咯烷系列药物的药代动力学特性,并轻松获得大鼠药效学模型,从而鉴定出化合物43,这是一种口服活性脑渗透抑制剂,以剂量依赖的方式降低大鼠血浆,CSF和皮质中的Aβ40。