Sahar B. Aljuboori
@ruc.edu.iq
faculty of phramacetical chemistry / department of phramacy
doctor in rafidain university college
RESEARCH INTERESTS
I completed a Bachelor’s and Master’s degrees in organic chemistry at the University of Tahrin, and a PhD in organic chemistry from the University of Al-Mustansiriya. I then worked at Al-Rafidain University College, Department of Pharmacy. Until now, he has published research in local and Scopus mag
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Nedaa A. Hameed A. Rahim, Sumayah Saadi Abbas, Sahar B. Aljuboori, and Ammar A Razzak Mahmood
Research Journal of Pharmacy and Technology A and V Publications
Objective: Benzoxazole derivatives have antifungal, anticancer, antibacterial, and anticonvulsant function. Encouraged by this comment, we agreed to synthesize new Benzoxazole compounds connected to the bases of Schiff's. Methods: 2,4-diaminophenol (1) was prepared by the reaction of 2,4-dinitrophenol and sodium dithionate. Compound (1) reacted with either acetic acid to afford compound (2) or with formic acid to afford compound (3). The Schiff bases were preparation from the reaction condensing reaction of compound (2) or (3) and aromatic aldehydes or ketone; [p-nitrobenzaldehyde, p-hydroxybenzaldehyde, p-chlorobenzaldehyde, p-bromoacetophenone and terephthaldehyde]. Results: FTIR and 1H-NMR spectroscopy characterized all of the preparation compounds. The synthesized derivatives against (Gram positive bacteria GPB) (Bacillus subtilis) and two (Gram-negative bacteria GNB) (Klebsiella pneumoniae and Escherichia coli) and (one fungal species Candida albicans), have been evaluated to their antibacterial activity in vitro. all results showed which most of them have good antibacterial activity, while their antifungal activity revealed that compounds displayed slight antifungal activity. The synthesized Benzoxazole derivatives were docked using, glucosamine 6-phosphate synthase as a ligand. Conclusion: The antimicrobial activity indicates that compounds (4), (7) and (8) have more potent antibacterial activity than the compounds (5) and (6). Molecular docking study revealed that compounds (7) and (8), with bulky phenyl groups are essential to block the active centers of (GluN-6-Ps) amino acids synthase in the bacteria.
Sahar B. Al-Juboori
Dr. Yashwant Research Labs Pvt. Ltd.
Dihydropyrimidinone and dihydropyrimidine derivatives are reported to possess broad biological activities. Many synthetic samples have been studied as antibacterial, antiviral, and anticancer agents. We decided to synthesize novel compounds of new pyrimidine derivatives. The present work involves the synthesis of new dihydropyridine derivatives. The starting vanillin, compound (1) was used as the key intermediate to prepare the 5-acetyl-4-(4-hydroxy-3-methoxyphenyl)-6-methyl pyrimidine-2(1H)-one(2),Ethyl 4-(4-hydroxy-3-methoxyphenyl)-6-methyl-2-oxo-1,2-dihydropyrimidine-5-carboxylate (3), 4-(4-hydroxy-3-methoxyphenyl)-5,6,7,8-tetrahydro quinazoline-2(1H)-one (4), respectively, through the reaction with urea and acetylacetone or ethyl acetoacetate or cyclohexanone but 4-(4-hydroxy-3-methoxyphenyl)-5,6,7,8-tetrahydro quinazoline-2(1H)-thione (5) reacted with thiourea and cyclohexanone. FTIR,1H-NMRand13C-NMR spectroscopy characterized all the synthesized compounds. The synthesized derivatives were screened for their in vitro, antibacterial activity against two gram-positive bacteria: Bacillus subtilis, and Staphylococcus aureus and two gram-negative bacteria: Klebsiella pneumonia and Salmonella typhi and the results showed that most of them have good antibacterial activity. While their antifungal activity against three fungi species: (Aspergillus fumigates, Aspergillus niger, and Rhizopus), revealed that compounds (1-5) displayed the most potent antifungal activity. Density functional theory ( DFT) calculations for the synthesized compounds (1-5) were conducted, using a molecular structure with optimized geometry. Highest occupied molecular orbital/lowest unoccupied molecular orbital energies and structures are demonstrated. The antimicrobial activity indicates that compounds 3 and 4 are the most active than the compounds 2 and 5. Molecular docking revealed that compounds (4) and (5), with cyclohexyl groups are important to block the active centers of glucose -6-phosphate synthase in the bacteria and fungi.
Dana M. Hussein, Sahar B. Al-juboory, and Ammar A. Razzak Mahmood
Oriental Scientific Publishing Company
New derivatives of 7-hydroxy-4-methylcoumarin were synthesized via oxidation of methyl group at C4 of parent coumarin nucleus using SeO2 as an oxidizing agent. Then the condensation with different aromatic amines and amino acids under conventional method. The structures of the title Schiff bases were elucidated by spectral analysis: FT-IR,13CNMR, and MS.All the compounds were tested in vitro for their preliminary antibacterial activity against two Gram-positive and two Gram –negative bacteria, using serial dilution method, and determining their minimum inhibitory concentrations for the title compounds. Most of the derivatives showed moderate to high antibacterial activity.Compound 7 showed a good antibacterial activity against Grampositive Staphylococcus aureus and Micrococcus luteus also very potent antibacterial activity against Gram-negative E.coli. Density functional theory (DFT)calculations for the synthesized coumarins were performed using a molecular structure with optimized geometry. Molecular orbital calculations supported a full description of the orbitals, including spatial characteristics, nodal patterns, and the contributions of individual atoms.Highest occupied molecular orbital/lowest unoccupied molecular orbital energies and structures are demonstrated. keywords: Antibacterial activity, broth dilution method, density functional theory(DFT), 7-hydroxy-4-methylcoumarin, Schiff base,