Structure–activity relationships of heteroaromatic esters as human rhinovirus 3C protease inhibitors
摘要:
Human rhinovirus 3C protease (HRV 3C(pro)) is known to be a promising target for development of therapeutic agents against the common cold because of the importance of the protease in viral replication as well as its expression in a large number of serotypes. To explore non-peptidic inhibitors of HRV 3C(pro), a series of novel heteroaromatic esters was synthesized and evaluated for inhibitory activity against HRV 3C(pro), to determine the structure-activity relationships. The most potent inhibitor, 7, with a 5-bromopyridinyl group, had an IC50 value of 80 nM. In addition, the binding mode of a novel analog, 19, with the 4-hydroxyquinolinone moiety, was explored by molecular docking, suggesting a new interaction in the S1 pocket. (C) 2009 Elsevier Ltd. All rights reserved.
A novel metal- and catalyst-free dearomative reaction of 2-oxypyridines to construct gem-difluoromethylenated N-substituted 2-pyridones has been developed. The reaction involves an attractive acyl rearrangement from O to CF2 of difluorocarbene-derived pyridinium ylides, which provides a new strategy for the direct introduction of the gem-difluoromethylene group with high efficiency and selectivity as
Difluorocarbene enabled ester insertion/1,4-acyl rearrangement of 2-acetoxylpyridines: Modular access to gem-difluoromethylenated 2-pyridones
作者:Shi-Wei Li、Gang Wang、Zhi-Shi Ye
DOI:10.1016/j.tetlet.2023.154413
日期:2023.4
An efficient and simple protocol for the construction of gem-difluoromethylenated 2-pyridones via difluorocarbene enabled ester insertion/acyl rearrangement of 2-acetoxylpyridines and (bromodifluoromethyl)trimethylsilane has been documented. The reactions feature transition-metal free, mild reaction conditions and excellent functional group compatibility. The late-stage modification of bioactive molecules