Discovery of in vitro antitubercular agents through in silico ligand-based approaches
摘要:
The development of new anti-tubercular agents represents a constant challenge mostly due to the insurgency of resistance to the currently available drugs. In this study, a set of 60 molecules were selected by screening the Asinex and the ZINC collections and an in house library by means of in silico ligand-based approaches. Biological assays in Mycobacterium tuberculosis H37Ra ATCC 25177 strain highlighted (+/-)-1-(4-chlorophenyl)-2-(1H-imidazol-1-yl)ethyl-4-(3,4-dichlorophenyl)piperazine-1-carboxylate (5i) and 3-(4-chlorophenyl)-5-(2,4-dimethylpyrimidin-5-yl)-2-methylpyrazolo[1.5-a]pyrimidin-7(4H)-one (42) as the most potent compounds, having a Minimum Inhibitory Concentration (MIC) of 4 and 2 mu g/mL respectively. These molecules represent a good starting point for further optimization of effective anti-TB agents. (C) 2016 Elsevier Masson SAS. All rights reserved.
Palladium-Catalyzed Enantioselective Decarboxylative Allylic Alkylation of Acyclic α-<i>N</i>-Pyrrolyl/Indolyl Ketones
作者:Remi Lavernhe、Eric J. Alexy、Haiming Zhang、Brian M. Stoltz
DOI:10.1021/acs.orglett.0c01303
日期:2020.6.5
The synthesis of fully substituted α-N-pyrrolyl and indolyl ketones via enantioselectivepalladium-catalyzedallylic alkylation is described. The acyclic ketones are alkylated in high yields with high enantioselectivities through the use of an electron-deficient phosphinooxazoline ligand, furnishing a highly congested and synthetically challenging stereocenter. The obtained alkylation products contain
CH3CO2H-prompted three components tandem reaction: An efficient and practical approach to trisubstituted pyrrolo[1,2-a]pyrazines
作者:Xianglong Chu、Zeyuan Zhang、Congcong Wang、Xuan Chen、Bin Wang、Chen Ma
DOI:10.1016/j.tet.2017.10.066
日期:2017.12
An efficient protocol for the synthesis of trisubstitued pyrrolo[1,2-a]pyrazines through three components cyclization and one-pot cascade reaction is presented. Various trisubstitued pyrrolo[1,2-a]pyrazines are obtained by this metal-free process in moderate to good yields.
提出了一种通过三组分环化和一锅级联反应合成三取代吡咯并[1,2- a ]吡嗪的有效方案。通过该无金属方法,以中等至良好的产率获得了各种三取代的吡咯并[1,2- a ]吡嗪。