OALib Journal
  OALib Journal is an all-in-one open access journal (ISSN Print: 2333-9705, ISSN Online: 2333-9721). It accepts a manuscript for the peer-review processing, typesetting, publication and then allocated to one of the 322 subject areas. The article processing charge for publishing in OALib journal is Only $99. For more details, please contact service@oalib.com. Submit now
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Oct 30, 2023Open    Access

Characterization and Structural Studies of Metal Complexes of 5-Aminomethyl-[13]aneN4

Rim Zaari Jabri, Yoann Rousselin, Stephane Brandes, Christine Goze, Abdellah Zrineh, Franck Denat
We report here a complete study of coordination of the 5-aminomethyl-[13] aneN4 ligand by three metals: Cu(II), Ni(II) and Cr(III) in order to determine the effect of the C-functionalization of the macrocycle on the stability of the metal complexes even if we change the size of the metal used. The results obtained by spectrometry, EPR and X-ray of the metal complexes showed that the copper is pentacoordinate in square-based pyramidal environment, but the chromium and nickel complexes ...
Open Access Library J.   Vol.10, 2023

Sep 14, 2023Open    Access

Study of the Double Fluorescence of a New Anthracene (13)aneN4

Rim Zaari Jabri, Alla Lemeune, Abdellah Zrineh, Franck Denat
In this work, a new ligand (13)aneN4 with anthracene was synthesized and characterized by mass spectrometry, NMR, UV-Vis and fluorescence spectroscopies. The ligand has a double fluorescence explained by the presence of a photoinduced charge transfer. The fluorescence spectra in various solvents show an increase in the intensity of the band charge transfer with solvent polarity and a decrease in the intensity of the band of the locally excited state of anthracene. The fluorescence studies was al...
Open Access Library J.   Vol.10, 2023

Apr 30, 2021Open    Access

β-Hydrosilylation of Allylic Derivatives with Cyclic and Linear Siloxanes in the Presence of Platinum Catalysts

Zainab Rbihi, Salah Eddine Lanaya, Mohamed Yassine Guida, El Mostapha Rakib, Abdelatif Barakat, Abdelghani El Malki, Abdellah Hannioui
The aim of this work is to study the influence of the nature and position of substitution at allyl benzene on the regioselectivity of the hydrosilylation reaction. We studied hydrosilylation of the various allyl derivatives with cyclic siloxane, D4H, and linears hydrosilylating agents, 1,1,3,3-tetramethyldisiloxane and MDHM, in the presence of platinum-based catalysts (Karstedt catalyst, platinum black). We also show the effects of the a...
Open Access Library J.   Vol.8, 2021

Sep 18, 2019Open    Access

Evaluation of Antibacterial Activities and Cytotoxicity of Sclerocarya birrea Stem Bark

Abigail John Mai, Michael Emmanuel, Patrick Ayim, Mohammed Bello Magaji
The research was aimed at the antibacterial studies and cytotoxicity of aqueous trona extract of Sclerocarya birrea (marula) stem bark. Extraction of the stem bark was carried out using decoction method from the dried stem bark of marula. The extract was subjected to phytochemical screening, antibacterial and cytotoxicity test. The extract indicated the presence of tannin, saponins and alkaloids with the absenc
Open Access Library J.   Vol.6, 2019

May 12, 2017Open    Access

Ring-Chain Tautomerism of the Condensation Products of 2-Mercaptobenzohydrazide with Aliphatic and Aromatic Aldehydes: Influence of Electronic and Steric Factors

Andrei Yu Ershov, Igor V. Lagoda, Marina Yu Vasileva, Stanislav I. Yakimovich, Boris V. Chernitsa, Lyudmila Yu Kuleshova, Lyudmila V. Pavlova, Aleksandr V. Yakimansky
It has been shown by 1H and 13C NMR spectroscopy that 2-mercaptobenzoyl-hydrazones of aliphatic and aromatic aldehydes exist in solution as tautomeric mixtures of linear and cyclic benzo-1,3,4-thiadiazepine forms. The linear hydrazone form is represented by (E,
Open Access Library J.   Vol.4, 2017

May 04, 2017Open    Access

The Uses of 2-Amino-4-Phenylthiazole in the Synthesis of Coumarin, Pyran, Pyridine and Thiazole Derivatives with Antitumor Activities

Faten I. Hamed, Abeer A. Mohamed, Amr S. Abouzied
The thiazole derivative 3 was used for a series of heterocyclization reaction to produce pyran, pyridine and thiazole derivatives. The cytotoxicity of the newly synthesized compounds was studied against the six cancer cell lines namely NUGC, HR, DLD1, HA22T, HEPG2, MCF, HONE1 and normal fibroblast cells (WI38). The results showed that most of the synthesized compounds were of high potency. Amo
Open Access Library J.   Vol.4, 2017

Jul 26, 2016Open    Access

Synthesis and Antitumor Activity of Novel Thienopyrimidine Derivatives Containing Thiosemicarbazide Moiety

Samir B. Salib, Omneya M. Khalil, Mona M. Kamel, Yara El-Dash
The present study focused on synthesizing a series of novel derivatives of 4-aryl-1-[2-(3-benzyl-4-oxo(3H)-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidin-2-ylsulphanyl) acetyl] thiosemicarbazide 5a-d and evaluating their antitumor activity. The structure of the synthesized compounds has been
Open Access Library J.   Vol.3, 2016

May 23, 2016Open    Access

Structure of Aldoses Condensation Products with SH-Containing Hydrazides

Andrei Yu Ershov, Igor V. Lagoda, Stanislav I. Yakimovich, Lyudmila Yu Kuleshova, Marina Yu Vasileva, Irina S. Korovina, Valery V. Shamanin
The structure of the condensation products of thiobenzohydrazide, 2-sulfanylacetohydrazide, 3-sulfanylpropiohydrazide, and 2-sulfanylbenzohydrazide with a series of aldoses (L-arabinose, D-ribose, L-rhamnose, D-galactose, D-glucose, and D-mannose) was studied by 1H- and 13C-NMR spectro
Open Access Library J.   Vol.3, 2016

May 04, 2016Open    Access

Structure of Aldoses Condensation Products with 2-Hydroxy- and 2-Aminobenzohydrazides

Igor V. Lagoda, Andrei Yu Ershov, Stanislav I. Yakimovich, Marina Yu Vasileva, Valery A. Polukeev, Ludmila Yu Kuleshova, Irina S. Korovina, Valery V. Shamanin
The structure of the condensation products of 2-hydroxybenzohydrazide, 2-aminobenzohydrazide, and N-methyl-N-(2-aminobenzo) hydrazide with a series of aldoses (L-arabinose, D-ribose, L- rhamnose, D-galactose, D-glucose, and D-mannose) was studied by 1H- and 13C-NMR spectroscopy. The condensation products of aldoses with 2-hydroxybenzohydrazide and 2-aminobenzohydra- zide in DMSOd6 solutions exist as equilibrium mixtures of linear acylhydrazone and cyclic p...
Open Access Library J.   Vol.3, 2016

Apr 23, 2015Open    Access

β-Oxo Anilides in Heterocyclic Synthesis: Novel Synthesis of Substituted Pyridazinones, Pyridine, Pyrimidines and Pyrazolotriazines

Abdel Haleem Mostafa Hussein, Mohamed Sayed Abdel Aal El-Gaby, Ahmed Abdel Hameed Abd El-Maged, Ahmed Mohmed El-Sharief, Yousry Ahmed Ammar
Diazotization and coupling of acetoacetanilide derivative 1 with aromatic amines afforded the arylhydrazones 2a,b. Arylhydrazones 2a,b were treated with (DMF-DMA) to yield the pyridazine derivatives 3a,b in good yield. Pyridazinone was treated with hydrazine hydrate to yield 4a,b. Reaction of 2a with hydroxylamine hydrochloride afforded the oxime derivative 5. Similarly, the reaction of acetoacetanilide 1 with hydroxylamine hydrochloride gave 3-hydroxyimino-N-p-tolyl- butyramide 8 not the pyrazo...
Open Access Library J.   Vol.2, 2015


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