<abstract xmlns="http://www.w3.org/1999/xhtml">Six new <italic>N</italic>-pyrrolylhydrazide hydrazones were synthesized under micro synthesis conditions, assuring about 59–93 % yield, low harmful emissions and reagent economy. The structures of the new compounds were elucidated by melting points, TLC characteristics, IR, 1H and 13C NMR spectral data followed by MS data. The purity of the obtained compounds was proven by the corresponding elemental analyses. “Lipinski’s rule of five” parameters were applied for preliminary evaluation of the pharmacokinetic properties of the target molecules. The initial <italic>in vitro</italic> safety screening for cytotoxicity (on HepG2 cells) and hemocompatibility (hemolysis assay) showed good safety of the new compounds, where ethyl 5-(4-bromophenyl)-1-(1-(2-(4-hydroxy-3-methoxybenzylidene)-hydrazineyl)-1-oxo-3-phenylpropan-2-yl)-2-methyl-1<italic>H</italic>-pyr-role-3-carboxylate (<bold>4d</bold>) and ethyl 5-(4-bromophenyl)-1-(1-(2-(2-hydroxybenzylidene)hydrazineyl)-1-oxo-3-phenylpropan--2-yl)-2-methyl-1<italic>H</italic>-pyrrole-3-carboxylate (<bold>4a</bold>) were the least toxic. The antioxidant activity in terms of radical scavenging activity (DPPH test) and reducing ability (ABTS) was also evaluated. The antioxidant protective potential of the compounds was next determined in different <italic>in vitro</italic> cellular-based models, revealing compounds <bold>4d</bold> and <bold>3</bold> [ethyl 5-(4-bromophenyl)-1-(1-hydrazineyl-1-oxo-3-phenylpropan-2-yl)-2-methyl-1<italic>H</italic>-pyrrole-3-carboxylate] as the most promising compounds, with <bold>4d</bold> having better safety profile.</abstract>

Six new N-pyrrolylhydrazide hydrazones were synthesized under micro synthesis conditions, assuring about 59–93 % yield, low harmful emissions and reagent economy. The structures of the new compounds were elucidated by melting points, TLC characteristics, IR, 1H and 13C NMR spectral data followed by MS data. The purity of the obtained compounds was proven by the corresponding elemental analyses. “Lipinski’s rule of five” parameters were applied for preliminary evaluation of the pharmacokinetic properties of the target molecules. The initial in vitro safety screening for cytotoxicity (on HepG2 cells) and hemocompatibility (hemolysis assay) showed good safety of the new compounds, where ethyl 5-(4-bromophenyl)-1-(1-(2-(4-hydroxy-3-methoxybenzylidene)-hydrazineyl)-1-oxo-3-phenylpropan-2-yl)-2-methyl-1H-pyr-role-3-carboxylate (4d) and ethyl 5-(4-bromophenyl)-1-(1-(2-(2-hydroxybenzylidene)hydrazineyl)-1-oxo-3-phenylpropan--2-yl)-2-methyl-1H-pyrrole-3-carboxylate (4a) were the least toxic. The antioxidant activity in terms of radical scavenging activity (DPPH test) and reducing ability (ABTS) was also evaluated. The antioxidant protective potential of the compounds was next determined in different in vitro cellular-based models, revealing compounds 4d and 3 [ethyl 5-(4-bromophenyl)-1-(1-hydrazineyl-1-oxo-3-phenylpropan-2-yl)-2-methyl-1H-pyrrole-3-carboxylate] as the most promising compounds, with 4d having better safety profile.

Synthesis, <italic>in vitro</italic> safety and antioxidant activity of new pyrrole hydrazones

Department of Pharmaceutical Chemistry, Faculty of Pharmacy

Department of Organic Synthesis and Fuels

University of Chemical Technology and Metallurgy

Department of Pharmacology Pharmacotherapy and Toxicology Faculty of Pharmacy

Acta Pharmaceutica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis,  safety and antioxidant activity of new pyrrole hydrazones

Six new N-pyrrolylhydrazide hydrazones were synthesized under micro synthesis conditions, assuring about 59–93 % yield, low harmful emissions and reagent...

Synthesis, in vitro safety and antioxidant activity of new pyrrole hydrazones

Publicado en línea: 17 feb 2020

Páginas: 303 - 324

Aceptado: 12 sept 2019

DOI: https://doi.org/10.2478/acph-2020-0026

Palabras clave
pyrrole hydrazones, DPPH, ABTS, cytotoxicity, micro-somes, oxidative stress

© 2020 Diana Tzankova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Synthesis, in vitro safety and antioxidant activity of new pyrrole hydrazones

Publicado en línea: 17 feb 2020

Páginas: 303 - 324

Aceptado: 12 sept 2019

DOI: https://doi.org/10.2478/acph-2020-0026

Palabras clavepyrrole hydrazones, DPPH, ABTS, cytotoxicity, micro-somes, oxidative stress

© 2020 Diana Tzankova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Palabras clave
pyrrole hydrazones, DPPH, ABTS, cytotoxicity, micro-somes, oxidative stress