Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide

A series of new pyrrole derivatives were designed as chemical analogs of the 1,4-dihydropyridines drugs in order to develop future new calcium channel blockers. The new tri- and tetra-substituted <i>N</i>-arylpyrroles were synthesized by the one-pot reaction of 1-methyl-3-cyanomethyl ben...

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Autores principales: Beatrice-Cristina Ivan, Florea Dumitrascu, Adriana Iuliana Anghel, Robert Viorel Ancuceanu, Sergiu Shova, Denisa Dumitrescu, Constantin Draghici, Octavian Tudorel Olaru, George Mihai Nitulescu, Mihaela Dinu, Stefania-Felicia Barbuceanu
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:50ba9b3b4d214fd69a0031ea6801b0232021-11-11T18:27:01ZSynthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide10.3390/molecules262164351420-3049https://doaj.org/article/50ba9b3b4d214fd69a0031ea6801b0232021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6435https://doaj.org/toc/1420-3049A series of new pyrrole derivatives were designed as chemical analogs of the 1,4-dihydropyridines drugs in order to develop future new calcium channel blockers. The new tri- and tetra-substituted <i>N</i>-arylpyrroles were synthesized by the one-pot reaction of 1-methyl-3-cyanomethyl benzimidazolium bromide with substituted alkynes having at least one electron-withdrawing substituent, in 1,2-epoxybutane, acting both as the solvent and reagent to generate the corresponding benzimidazolium N3-ylide. The structural characterization of the new substituted pyrroles was based on IR, NMR spectroscopy as well as on single crystal X-ray analysis. The toxicity of the new compounds was assessed on the plant cell using <i>Triticum aestivum</i> L. species and on the animal cell using <i>Artemia franciscana</i> Kellogg and <i>Daphnia magna</i> Straus crustaceans. The compounds showed minimal phytotoxicity on <i>Triticum</i> rootlets and virtually no acute toxicity on <i>Artemia</i> nauplii, while on <i>Daphnia magna</i>, it induced moderate to high toxicity, similar to nifedipine. Our research indicates that the newly synthetized pyrrole derivatives are promising molecules with biological activity and low acute toxicity.Beatrice-Cristina IvanFlorea DumitrascuAdriana Iuliana AnghelRobert Viorel AncuceanuSergiu ShovaDenisa DumitrescuConstantin DraghiciOctavian Tudorel OlaruGeorge Mihai NitulescuMihaela DinuStefania-Felicia BarbuceanuMDPI AGarticlebenzimidazolium bromidealkynes1,3-dipolar cycloadditionpyrrolesX-ray diffractiontoxicity evaluationOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6435, p 6435 (2021)
institution DOAJ
collection DOAJ
language EN
topic benzimidazolium bromide
alkynes
1,3-dipolar cycloaddition
pyrroles
X-ray diffraction
toxicity evaluation
Organic chemistry
QD241-441
spellingShingle benzimidazolium bromide
alkynes
1,3-dipolar cycloaddition
pyrroles
X-ray diffraction
toxicity evaluation
Organic chemistry
QD241-441
Beatrice-Cristina Ivan
Florea Dumitrascu
Adriana Iuliana Anghel
Robert Viorel Ancuceanu
Sergiu Shova
Denisa Dumitrescu
Constantin Draghici
Octavian Tudorel Olaru
George Mihai Nitulescu
Mihaela Dinu
Stefania-Felicia Barbuceanu
Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
description A series of new pyrrole derivatives were designed as chemical analogs of the 1,4-dihydropyridines drugs in order to develop future new calcium channel blockers. The new tri- and tetra-substituted <i>N</i>-arylpyrroles were synthesized by the one-pot reaction of 1-methyl-3-cyanomethyl benzimidazolium bromide with substituted alkynes having at least one electron-withdrawing substituent, in 1,2-epoxybutane, acting both as the solvent and reagent to generate the corresponding benzimidazolium N3-ylide. The structural characterization of the new substituted pyrroles was based on IR, NMR spectroscopy as well as on single crystal X-ray analysis. The toxicity of the new compounds was assessed on the plant cell using <i>Triticum aestivum</i> L. species and on the animal cell using <i>Artemia franciscana</i> Kellogg and <i>Daphnia magna</i> Straus crustaceans. The compounds showed minimal phytotoxicity on <i>Triticum</i> rootlets and virtually no acute toxicity on <i>Artemia</i> nauplii, while on <i>Daphnia magna</i>, it induced moderate to high toxicity, similar to nifedipine. Our research indicates that the newly synthetized pyrrole derivatives are promising molecules with biological activity and low acute toxicity.
format article
author Beatrice-Cristina Ivan
Florea Dumitrascu
Adriana Iuliana Anghel
Robert Viorel Ancuceanu
Sergiu Shova
Denisa Dumitrescu
Constantin Draghici
Octavian Tudorel Olaru
George Mihai Nitulescu
Mihaela Dinu
Stefania-Felicia Barbuceanu
author_facet Beatrice-Cristina Ivan
Florea Dumitrascu
Adriana Iuliana Anghel
Robert Viorel Ancuceanu
Sergiu Shova
Denisa Dumitrescu
Constantin Draghici
Octavian Tudorel Olaru
George Mihai Nitulescu
Mihaela Dinu
Stefania-Felicia Barbuceanu
author_sort Beatrice-Cristina Ivan
title Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
title_short Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
title_full Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
title_fullStr Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
title_full_unstemmed Synthesis and Toxicity Evaluation of New Pyrroles Obtained by the Reaction of Activated Alkynes with 1-Methyl-3-(cyanomethyl)benzimidazolium Bromide
title_sort synthesis and toxicity evaluation of new pyrroles obtained by the reaction of activated alkynes with 1-methyl-3-(cyanomethyl)benzimidazolium bromide
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/50ba9b3b4d214fd69a0031ea6801b023
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