Development of a potent 2-oxoamide inhibitor of secreted phospholipase A2 guided by molecular docking calculations and molecular dynamics simulations
作者:Sofia Vasilakaki、Efrosini Barbayianni、Georgios Leonis、Manthos G. Papadopoulos、Thomas Mavromoustakos、Michael H. Gelb、George Kokotos
DOI:10.1016/j.bmc.2016.02.040
日期:2016.4
Inhibition of group IIA secreted phospholipaseA2 (GIIA sPLA2) has been an important objective for medicinal chemists. We have previously shown that inhibitors incorporating the 2-oxoamide functionality may inhibit human and mouse GIIA sPLA2s. Herein, the development of new potent inhibitors by molecular docking calculations using the structure of the known inhibitor 7 as scaffold, are described. Synthesis
demonstrated as olefinating agents in the silver-catalyzed olefination of aryl and cinnamyl aldehydes to make α,β- and α,β,γ,δ-unsaturated esters with excellent E-selectivity. Trimethyl orthoformate plays a dual role by generating nucleophilic allenolate from propiolate and more electrophilic oxocarbenium ion fromaldehyde to effect the reaction.
New potent and selective polyfluoroalkyl ketone inhibitors of GVIA calcium-independent phospholipase A2
作者:Victoria Magrioti、Aikaterini Nikolaou、Annetta Smyrniotou、Ishita Shah、Violetta Constantinou-Kokotou、Edward A. Dennis、George Kokotos
DOI:10.1016/j.bmc.2013.07.010
日期:2013.9
Group VIA calcium-independent phospholipaseA2 (GVIA iPLA2) has recently emerged as an important pharmaceutical target. Selective and potent GVIA iPLA2 inhibitors can be used to study its role in various neurological disorders. In the current work, we explore the significance of the introduction of a substituent in previously reported potent GVIA iPLA2 inhibitors. 1,1,1,2,2-Pentafluoro-7-(4-methox
Design, synthesis and antibacterial activity against pathogenic mycobacteria of conjugated hydroxamic acids, hydrazides and O-alkyl/O-acyl protected hydroxamic derivatives
their toxicity towards murine macrophages by the resazurin microtiter assay (REMA). Among the 45 derivatives, 17 compounds (3 hydroxamicacids, 9 hydrazides, and 5O-alkyl/O-acyl protected hydroxamicacids) were nontoxic against murine macrophages. When tested for their antibacterial activity, hydroxamicacid 9 h was found to be the most potent inhibitor against M. abscessus S and R only. Regarding hydrazide
以发现新的抗结核分子为目的,合成了三个新系列的 23 异羟肟酸、13 酰肼和 9O-烷基/O-酰基保护异羟肟酸衍生物,并通过光谱1 H NMR、13 C NMR、HRMS对其进行了全面表征。 ) 分析。通过刃天青微量滴定法 (REMA) 进一步对这些化合物进行了生物筛选,以了解它们对三种致病性分枝杆菌(脓肿分枝杆菌 S 和 R、海分枝杆菌和结核分枝杆菌)的体外抗菌活性,以及它们对小鼠巨噬细胞的毒性。 . 在 45 种衍生物中,17 种化合物(3 种异羟肟酸、9 种酰肼和 5O-烷基/O-酰基保护的异羟肟酸)对小鼠巨噬细胞无毒。当测试它们的抗菌活性时,异羟肟酸发现9 小时仅对脓肿分枝杆菌 S 和 R 是最有效的抑制剂。酰肼系列对脓肿分枝杆菌R、海分枝杆菌和结核分枝杆菌的活性仅7h ;而 O- 酰基保护的异羟肟酸衍生物14d和15d对 M. marinum 和 M. tuberculosis