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Synthesis and Biological Evaluation of 2‐oxo‐pyrazine‐3‐carboxamide‐yl Nucleoside Analogues and Their Epimers as Inhibitors of Influenza A Viruses

Identifieur interne : 001061 ( Istex/Corpus ); précédent : 001060; suivant : 001062

Synthesis and Biological Evaluation of 2‐oxo‐pyrazine‐3‐carboxamide‐yl Nucleoside Analogues and Their Epimers as Inhibitors of Influenza A Viruses

Auteurs : Jingjing Gao ; Xianjin Luo ; Yuhuan Li ; Rongmei Gao ; Haifeng Chen ; Dingjue Ji

Source :

RBID : ISTEX:57E9ED4A808FE9AB9D93221A2037C50D8CB75234

Abstract

Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized and evaluated for their activities against influenza A viruses H1N1 and H3N2 in Madin‐Darby canine kidney cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers, 4‐[(1S, 3R, 4R, 7R)‐7‐hydroxy‐1‐(hydroxymethyl)‐2,5‐dioxabicyclo[2.2.1]heptan‐3‐yl]‐3‐oxo‐3,4‐dihydropyrazine‐2‐carboxamide 8a, with high antiviral activities (IC50 = 7.41, 5.63 μm for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (TC50 > 200 μm), has great potential for further development as a novel anti‐influenza A agent. Molecular docking of compound 8a with RNA‐dependent RNA polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp and to rationalize some SARs.
Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized, and evaluated for their activities against influenza A viruses H1N1 and H3N2 in MDCK cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers 8a shows high antiviral activity (IC50 = 7.41, 5.63 μm for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (TC50 > 200 μm). Molecular docking of compound 8a with RNA‐dependent RNA polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp.

Url:
DOI: 10.1111/cbdd.12382

Links to Exploration step

ISTEX:57E9ED4A808FE9AB9D93221A2037C50D8CB75234

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<p>Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized and evaluated for their activities against influenza A viruses H1N1 and H3N2 in
<hi rend="fc">Madin‐Darby canine kidney</hi>
cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers, 4‐[(1S, 3R, 4R, 7R)‐7‐hydroxy‐1‐(hydroxymethyl)‐2,5‐dioxabicyclo[2.2.1]heptan‐3‐yl]‐3‐oxo‐3,4‐dihydropyrazine‐2‐carboxamide
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<hi rend="italic">μ</hi>
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for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (
<hi rend="fc">TC</hi>
<hi rend="subscript">50</hi>
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<hi rend="italic">μ</hi>
<hi rend="smallCaps">m</hi>
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<hi rend="bold">8a</hi>
with
<hi rend="fc">RNA</hi>
‐dependent
<hi rend="fc">RNA</hi>
polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp and to rationalize some
<hi rend="fc">SAR</hi>
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<p>Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized, and evaluated for their activities against influenza A viruses H1N1 and H3N2 in
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cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers
<hi rend="bold">8a</hi>
shows high antiviral activity (
<hi rend="fc">IC</hi>
<hi rend="subscript">50</hi>
 = 7.41, 5.63 
<hi rend="italic">μ</hi>
<hi rend="smallCaps">m</hi>
for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (
<hi rend="fc">TC</hi>
<hi rend="subscript">50</hi>
 > 200 
<hi rend="italic">μ</hi>
<hi rend="smallCaps">m</hi>
). Molecular docking of compound
<hi rend="bold">8a</hi>
with
<hi rend="fc">RNA</hi>
‐dependent
<hi rend="fc">RNA</hi>
polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp.
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<correspondenceTo>Corresponding authors: Xianjin Luo,
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<i>and Yuhuan Li,</i>
 
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<p>Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized and evaluated for their activities against influenza A viruses H1N1 and H3N2 in
<fc>Madin‐Darby canine kidney</fc>
cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers, 4‐[(1S, 3R, 4R, 7R)‐7‐hydroxy‐1‐(hydroxymethyl)‐2,5‐dioxabicyclo[2.2.1]heptan‐3‐yl]‐3‐oxo‐3,4‐dihydropyrazine‐2‐carboxamide
<b>8</b>
a, with high antiviral activities (
<fc>IC</fc>
<sub>50</sub>
 = 7.41, 5.63 
<i>μ</i>
<sc>m</sc>
for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (
<fc>TC</fc>
<sub>50</sub>
 > 200 
<i>μ</i>
<sc>m</sc>
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<b>8a</b>
with
<fc>RNA</fc>
‐dependent
<fc>RNA</fc>
polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp and to rationalize some
<fc>SAR</fc>
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<p>Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized, and evaluated for their activities against influenza A viruses H1N1 and H3N2 in
<fc>MDCK</fc>
cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers
<b>8a</b>
shows high antiviral activity (
<fc>IC</fc>
<sub>50</sub>
 = 7.41, 5.63 
<i>μ</i>
<sc>m</sc>
for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (
<fc>TC</fc>
<sub>50</sub>
 > 200 
<i>μ</i>
<sc>m</sc>
). Molecular docking of compound
<b>8a</b>
with
<fc>RNA</fc>
‐dependent
<fc>RNA</fc>
polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp.
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<abstract>Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized and evaluated for their activities against influenza A viruses H1N1 and H3N2 in Madin‐Darby canine kidney cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers, 4‐[(1S, 3R, 4R, 7R)‐7‐hydroxy‐1‐(hydroxymethyl)‐2,5‐dioxabicyclo[2.2.1]heptan‐3‐yl]‐3‐oxo‐3,4‐dihydropyrazine‐2‐carboxamide 8a, with high antiviral activities (IC50 = 7.41, 5.63 μm for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (TC50 > 200 μm), has great potential for further development as a novel anti‐influenza A agent. Molecular docking of compound 8a with RNA‐dependent RNA polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp and to rationalize some SARs.</abstract>
<abstract type="graphical">Novel 2‐oxo‐pyrazine‐3‐carboxamide‐yl nucleoside analogues and their epimers were designed, synthesized, and evaluated for their activities against influenza A viruses H1N1 and H3N2 in MDCK cells. All the compounds showed low cytotoxicities in these anti‐influenza tests. One of the epimers 8a shows high antiviral activity (IC50 = 7.41, 5.63 μm for H3N2 and H1N1, respectively) and remarkable low cytotoxicity (TC50 > 200 μm). Molecular docking of compound 8a with RNA‐dependent RNA polymerase was performed to understand the binding mode between these inhibitors and the active site of RdRp.</abstract>
<subject>
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<topic>binding mode</topic>
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