Zobrazeno 1 - 10 of 31 pro vyhledávání: '"Elham S. Darwish"'
1
Akademický článek
Synthesis, Acidity Constants and Tautomeric Structure of the Diazonium Coupling Products of 2-(Benzylsulfanyl)-7H-purin-6-one in Its Ground and Excited States
Autor: Hosam A. Saad, Farag M. Altalbawy, Elham S. Darwish, Mosselhi A. Mosselhi
Publikováno v: Molecules, Vol 16, Iss 10, Pp 8788-8802 (2011)
A series of new 8-arylhydrazono-2-(benzylsulfanyl)-7H-purin-6-ones 6 were synthesized, their electronic absorption spectra in different organic solvents of varying polarities were investigated and their acid dissociation constants in both the ground
Externí odkaz: https://doaj.org/article/3f6a81d9d81f4782a762199a5cb4b692
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2
Akademický článek
Facile Synthesis of Heterocycles via 2-Picolinium Bromide and Antimicrobial Activities of the Products
Autor: Elham S. Darwish
Publikováno v: Molecules, Vol 13, Iss 5, Pp 1066-1078 (2008)
The 2-picolinium N-ylide 4, generated in situ from the N-acylmethyl-2-picolinium bromide 3, underwent cycloaddition to N-phenylmaleimide or carbon disulfideto give the corresponding cycloadducts 6 and 8, respectively similar reactions ofcompound 3 wi
Externí odkaz: https://doaj.org/article/3797c2ed027e43f3b824bf7e5e94d225
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3
Akademický článek
Facile Synthesis and Antimicrobial Evaluation of Some New Heterocyclic Compounds Incorporating a Biologically Active Sulfamoyl Moiety
Autor: Elham S. Darwish
Publikováno v: The Scientific World Journal, Vol 2014 (2014)
A facile and convenient synthesis of new heterocyclic compounds containing a sulfamoyl moiety suitable for use as antimicrobial agents was reported. The precursor 3-oxo-3-phenyl-N-(4-sulfamoylphenyl)propionamide was coupled smoothly with arenediazoni
Externí odkaz: https://doaj.org/article/42331c1f4e9d481a87d42da3c91331ea
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4
One-Step Room-Temperature Synthesis of Bimetallic Nanoscale Zero-Valent FeCo by Hydrazine Reduction: Effect of Metal Salts and Application in Contaminated Water Treatment
Autor: Asmaa A. Koryam, Shaimaa T. El-Wakeel, Emad K. Radwan, Elham S. Darwish, Azza M. Abdel Fattah
Publikováno v: ACS Omega. 7:34810-34823
The effect of initial salt composition on the formation of zero-valent bimetallic FeCo was investigated in this work. Pure crystalline zero-valent FeCo nanoparticles (NPs) were obtained using either chloride or nitrate salts of both metals. Smaller N
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f3bb509c16aad63f280218b7119d0fb
https://doi.org/10.1021/acsomega.2c03128
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6
Preparation and characterization of chemically cross-linked zwitterionic copolymer hydrogel for direct dye and toxic trace metal removal from aqueous medium
Autor: Asmaa A. Koryam, Shaimaa T. El-Wakeel, Emad K. Radwan, Azza M. Abdel Fattah, Elham S. Darwish
Publikováno v: Environmental Science and Pollution Research.
In this work, a zwitterionic copolymer hydrogel with adsorption affinity toward anionic dye and cationic trace metal was prepared by a free radical copolymerization of cationic ([3-(methacryloylamino)propyl] trimethylammonium chloride (MPTC)) and ani
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea09af9accaa4af91151af9615419c53
https://doi.org/10.1007/s11356-023-26966-7
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8
Synthesis and Antimicrobial Evaluation of Some Novel Thiazole, Pyridone, Pyrazole, Chromene, Hydrazone Derivatives Bearing a Biologically Active Sulfonamide Moiety
Autor: Elham S. Darwish, Oqba N. Al-Shayea, Azza M. Abdel Fattah, Fawzy A. Attaby
Publikováno v: International Journal of Molecular Sciences, Vol 15, Iss 1, Pp 1237-1254 (2014)
International Journal of Molecular Sciences; Volume 15; Issue 1; Pages: 1237-1254
International Journal of Molecular Sciences
This study aimed for the synthesis of new heterocyclic compounds incorporating sulfamoyl moiety suitable for use as antimicrobial agents via a versatile, readily accessible N-[4-(aminosulfonyl)phenyl]-2-cyanoacetamide (3). The 2-pyridone derivatives
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ffa17b4f8695f209bb02759763d56d5
http://www.mdpi.com/1422-0067/15/1/1237
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9
Synthesis, Characterization, Tautomeric Structure and Solvatochromic Behavior of Novel 4-(5-Arylazo-2-Hydroxystyryl)-1-Methylpyridinium Iodide as Potential Molecular Photoprobe
Autor: Farag M. A. Altalbawy, Hagar M. Saleh, M. Medhat, Elham S. Darwish, S.Y. El-Zaiat
Publikováno v: Materials, Vol 9, Iss 12, p 1022 (2016)
Materials
Materials; Volume 9; Issue 12; Pages: 1022
A novel series of the title compound 4-(5-arylazo-2-hydroxystyryl)-1-methylpyridinium iodide 6 has been synthesized via condensation reactions of the arylazosalicylaldehyde derivatives 4a–i with 1-methyl-picolinium iodide 5. The structures of the n
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc198366e0f6e9072cb1890213754e32
http://www.mdpi.com/1996-1944/9/12/1022
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10
Enamines in Heterocyclic Synthesis: A Novel Simple and Efficient Route to Condensed Pyridazines
Autor: Abdellatif M. Salaheldin, Mahmoud A. Abdelrahman, Elham S. Darwish
Publikováno v: Zeitschrift für Naturforschung B. 66:597-602
Enamines are versatile reagents, and the nucleophilic character of C-2 has found extensive applications in synthetic organic chemistry [1, 2]. Recently we described several efficient approaches to heteroaromatics utilizing functionally substituted en
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d550e11174629db80c1c7f40542431f
https://doi.org/10.1515/znb-2011-0607
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