Erratum to: “Synthesis and characterization of new D-π-D type Schiff base ligands”

Karaoğlan, Gülnur Keser; Erden, İbrahim; Avcıata, Ulvi

doi:10.1134/s1070363209070299

Cited by 2 publications

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“…[ 2 ] The obtained bands could be assigned as π → π* and n → π*. [ 24 ] Ligand HAI gave two bands at 243 and 248 nm and shoulder at 297 nm. These bands gave a blue shift (242 and 247 nm) in the polar solvent (acetonitrile solvent with dipole moment = 3.92 D) which revealed the n → π* electronic transition.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the biochemical activity of some market antibiotics by chemical modification: Synthesis, characterization, and biochemical evaluation

Abbas

Fisal

Orabi

2020

J Chinese Chemical Soc

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The reaction of isatin with the Ampicillin gave the new compound: (6R)‐3,3‐dimethyl‐7‐oxo‐6‐(2‐(([E]‐2‐oxoindolin‐3‐ylidene)amino)‐2‐phenylacetamido)‐4‐thia‐1‐azabicyclo[3.2.0]hept ‐ane‐2‐carboxylic acid (HAI). The new complexes derived from HAI and Co(II), Ni(II), Cu(II), Eu(III), and Gd(III) were obtained in pure form. The obtained compounds were characterized by elemental analysis, FTIR, UV–Vis, Fluorescence, 1HNMR, Mass spectra, DTA, TGA, Magnetic susceptibility, X‐ray, AAS, and the conductivity of 0.001 M in DMSO. The obtained data indicated the formation of the target complexes: [Co(HAI)(H2O)(NO3)]NO3.4H2O, [Ni(AI)(H2O)2]Cl.2H2O, [Cu(AI)]Cl.H2O, [Eu(AI)(H2O)Cl]Cl.5H2O and [Gd(AI)(H2O)(NO3)]NO3.3H2O. The ligation sites were predicted from the guide of the FTIR and thermal analysis meanwhile the stereochemistry was proved by the UV–Vis and magnetic moment. Co(II) and Ni(II) gave an octahedral structure while Cu(II) gave a square planar form. Molecular modeling, molecular mechanics, and DFT calculations were carried out for the synthesized compounds. The active lone pair and surface properties were obtained and discussed in the silico level. The x‐ray analysis indicates the nanoparticle behavior of the Cu‐AI complex with a monoclinic structure. The interactions of the synthesized complexes with FM‐DNA moiety were investigated through spectrometric titration (UV–vis. spectra) and by using fluorescence spectroscopy. The modes and binding affinities were evaluated and discussed using Benesi–Hildebrand method. Antimicrobial activities of the synthesized compounds have been screened using the disc diffusion method. HAI and Cu‐AI gave activity exceeded the Ampicillin. The docking work was carried using the targeting protein of Escherichia coli FabH (PDB code: 1HNJ). The obtained binding energy was compared and discussed in terms of the in vitro studies.

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Section: Resultsmentioning

confidence: 99%

Enhancement of the biochemical activity of some market antibiotics by chemical modification: Synthesis, characterization, and biochemical evaluation

Abbas

Fisal

Orabi

2020

J Chinese Chemical Soc

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“…1 Some Schiff bases and their derivatives represent an interesting class of compounds possessing a wide spectrum of biological activities, such as analgesic, antiviral, antifungal and anticancer activities. As is known, Schiff bases are reagents which are becoming increasingly important in the medicinal and pharmaceutical fields as well as dye, plastic and liquid crystal technology.…”

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confidence: 99%

“…As is known, Schiff bases are reagents which are becoming increasingly important in the medicinal and pharmaceutical fields as well as dye, plastic and liquid crystal technology. 1 Some Schiff bases and their derivatives represent an interesting class of compounds possessing a wide spectrum of biological activities, such as analgesic, antiviral, antifungal and anticancer activities. [2][3][4][5] Schiff base ligands and their complexes have been a fascinating area of research, due to their biological relevance.…”

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confidence: 99%

“…The aim of this study was to investigate the antioxidant effect of recently synthesised D-π-D type Schiff base ligands 1 and to elucidate their antioxidative action. For this purpose, the ligands (L 1 and L 2 ) have been screened for reducing power, chelating ability on metal ions, scavenging capacity against the radicals 2,2-diphenyl-1-picrylhydrazyl (DPPH), superoxide, hydroxyl, and those derived from 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS •+ ) and N,N-dimethyl-pphenylenediamine dihydrochloride (DMPD •+ ).…”

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confidence: 99%

“…Two Schiff bases of the D-π-D type were prepared according to our previously reported procedures and characterised by comparing their spectroscopic data to those reported earlier (Scheme 1) 1 . The ligands were stable in room temperature but hygroscopic, soluble in common polar organic solvents and partially soluble in non-polar organic solvents.…”

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Antioxidative Properties of Recently Synthesised D–Π–D type Schiff-Base Ligands

Karaoğlan

Kiymaz

Erden

et al. 2010

Journal of Chemical Research

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Two recently synthesised D-π-D type Schiff base ligands have been screened for their antioxidant capacity using several tests; reducing power, chelating ability on metal ions, scavenging capacity against the radicals 2,2-diphenyl-1-picrylhydrazyl, superoxide, hydroxyl, 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) and N,Ndimethyl-p-phenylenediamine dihydrochloride. The results were compared with synthetic antioxidants e.g. butylated hydroxytoluene, butylated hydroxyanisole, α-tocopherol, trolox or ascorbic acid. The results indicate that the ligands have significant hydroxyl and free radical scavenging activity, metal chelating effect and reducing power against various antioxidant systems in vitro. One ligand (L 2 ) showed excellent activity on scavenging the ABTS radical and superoxide radical. Therefore, these ligands may be a new kind of effective scavengers of reactive oxygen species.

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Erratum to: “Synthesis and characterization of new D-π-D type Schiff base ligands”

Cited by 2 publications

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Enhancement of the biochemical activity of some market antibiotics by chemical modification: Synthesis, characterization, and biochemical evaluation

Enhancement of the biochemical activity of some market antibiotics by chemical modification: Synthesis, characterization, and biochemical evaluation

Antioxidative Properties of Recently Synthesised D–Π–D type Schiff-Base Ligands

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