Synthesis and Biological Evaluation of N-Alkyl-3-(alkylamino)-pyrazine-2-carboxamides
作者:Lucia Semelkova、Klara Konecna、Pavla Paterova、Vladimir Kubicek、Jiri Kunes、Lucie Novakova、Jan Marek、Lieve Naesens、Matus Pesko、Katarina Kralova、Martin Dolezal、Jan Zitko
DOI:10.3390/molecules20058687
日期:——
A series of N-alkyl-3-(alkylamino)pyrazine-2-carboxamides and their N-alkyl-3-chloropyrazine-2-carboxamide precursors were prepared. All compounds were characterized by analytical methods and tested for antimicrobial and antiviral activity. The antimycobacterial MIC values against Mycobacterium tuberculosis H37Rv of the most effective compounds, 3-(hexylamino)-, 3-(heptylamino)- and 3-(octylamino)-N-methyl-pyrazine-2-carboxamides 14‒16, was 25 μg/mL. The compounds inhibited photosystem 2 photosynthetic electron transport (PET) in spinach chloroplasts. This activity was strongly connected with the lipophilicity of the compounds. For effective PET inhibition longer alkyl chains in the 3-(alkylamino) substituent in the N-alkyl-3-(alkylamino)pyrazine-2-carboxamide molecule were more favourable than two shorter alkyl chains.
一系列N-烷基-3-(烷基氨基)吡嗪-2-羧酰胺及其N-烷基-3-氯吡嗪-2-羧酰胺前体被制备出来。所有化合物均通过分析方法进行表征,并测试了其抗菌和抗病毒活性。在针对结核分枝杆菌(Mycobacterium tuberculosis H37Rv)的抗分枝杆菌MIC值中,效果最好的化合物3-(己氨基)-、3-(庚氨基)-和3-(辛氨基)-N-甲基吡嗪-2-羧酰胺14-16的MIC值为25微克/毫升。这些化合物抑制了菠菜叶绿体中的光系统II光合作用电子传输(PET)。这种活性与化合物的亲脂性密切相关。为了有效抑制PET,N-烷基-3-(烷基氨基)吡嗪-2-羧酰胺分子中3-(烷基氨基)取代基中的较长烷基链比两条较短的烷基链更有利。