Výsledky vyhledávání - "Mamdouh A. M. Taha"

Synthesis of some new 4-(2,4-dimethyl-phenyl)-2H-phthalazinone derivatives

Autor: Asmaa Kamal Mourad, Ahmed Thabet Ali Abdul-Ghaffar, Ibrahim E. El-Shamy, Mamdouh A. M. Taha

Publikováno v: Journal of Scientific Research in Science. 38

Aroylation of m-xylene by phthalic anhydride under Friedel craft’s reaction conditions to afford the corresponding o-aroylbenzoic acid derivative 2, which followed by cyclization reaction with hydroxylamine hydrochloride to produce the correlating

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e9fd3615946db0ebdbebb29133bfd414
https://doi.org/10.21608/jsrs.2021.48596.1039

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Biochemical Study on Lymphocyte Cell Surface Antigen in Hepatitis C Infected Patients

Autor: Rasha Elsayed, Shahira Abd Elshafai, Mostafa Ahmed Ezzat, Mamdouh A. M. Taha, Noha S. Khalifa

Publikováno v: Egyptian Academic Journal of Biological Sciences, E. Medical Entomology & Parasitology. 9:33-40

The current study aimed at assessment of peripheral blood lymphocyte cells in hepatitis C patients compared to Healthy controls and evaluating the potential diagnostic role and relation to disease severity and complications. Patients and Methods: The

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https://doi.org/10.21608/eajbse.2017.14474

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Synthesis and Antimicrobial Activity of Some Condensed [4-(2,4,6-Trimethylphenyl)-1(2H)-oxo-phthalazin-2-yl]acetic Acid Hydrazide

Autor: Maher A. El-Hashash, Ahmed Y. El-Kady, Mamdouh A. M. Taha, Ibrahim E. El-Shamy

Publikováno v: Chinese Journal of Chemistry. 30:616-626

Some new 1,2,4-triazolo-, 1,3,4-oxadiazolo-, 1,3,4-thiadiazol-, and pyrazolo-2,4,6-trimethylphenyl-1(2H)-oxo-phthalazine derivatives were synthesized and identified by IR, 1H NMR, 13C NMR, MS and elemental analysis. The new compounds were synthesized

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6895536b5d4e2c915bfedc0f53d2c9c9
https://doi.org/10.1002/cjoc.201100256

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Novel and Efficient Synthesis of Tetrazolo[1,5-b]-1,2,5-oxadiazepines as Antibacterial Activities from Ethyl 1-aminotetrazole-5-carboxylate

Autor: Susan M. El-Badry, Mamdouh A. M. Taha

Publikováno v: Journal of the Korean Chemical Society. 55:974-977

E-mail: mamdouhamtaha@yahoo.com(Received July 2, 2011; Accepted September 6, 2011)ABSTRACT. Ethyl 1-aminotetrazole-5-carboxylate (1) has been utilized to construct a variety of novel tetrazolo [1,5-b]-1,2,5-oxadiazepine derivatives which repesent a r

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https://doi.org/10.5012/jkcs.2011.55.6.974

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Antimicrobial Assessment of Some Heterocyclic Compounds Utilizing Ethyl 1-Aminotetrazole-5-carboxylate

Autor: Mamdouh A. M. Taha, Susan M. El-Badry

Publikováno v: Journal of the Korean Chemical Society. 54:414-418

Ethyl 1-aminotetrazole-5-carboxylate ( 1 ) reacted with hydrazine hydrate to give the corresponding aminohydrazide 2 . Cyclization of 2 by carbon disulfide yielded 1,3,4-oxadiazole-5-thiol structure 3 . Reaction of 3 with either chloroacetone or ethy

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https://doi.org/10.5012/jkcs.2010.54.4.414

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Convenient Synthesis of Some 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazoles and 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazines Bearing 3-Methylthio{7H-1,2,4-triazolo[1,5-d]tetrazol-6-yl}moiety as Possible Antimicrobial Activity

Autor: Mamdouh A. M. Taha

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 183:2525-2533

4-Amino-4H-3-methylthio{7H-1,2,4-triazolo[1,5-d]tetrazol-6-yl}-1,2,4-triazole-5thi-ol (1) was condensed with various substituted aromatic aldehydes or acid chlorides to yield a series of arylideneamines 2 or aroylamines 3. These were easily cyclized

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e990565ffbcc3ebd9007213ab210cc40
https://doi.org/10.1080/10426500801967773

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Design, synthesis, and antimicrobial activity of fused triheterocyclic nitrogen systems involving tetrazolo[1,5-b][1,2,4]triazines [1]

Autor: Mamdouh A. M. Taha, Susan M. El-Badry

Publikováno v: Monatshefte für Chemie - Chemical Monthly. 139:1261-1267

Dehydrogenative cyclization of the 6-substituted 7-arylidenehydrazinotetrazolo[1,5-b][1,2,4]triazines derived from 6-methyl and 6-phenyl derivatives of 7-hydrazinotetrazolo[1,5-b][1,2,4]triazines and aromatic aldehydes gave the corresponding 6-substi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16f28b20105eecd9633f3cbe52458ead
https://doi.org/10.1007/s00706-008-0902-8

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Synthesis of Condensed and Uncondensed Tetrazolo[1,5-b][1,2,4]triazines as Potential Antimicrobial Agents

Autor: Mamdouh A. M. Taha

Publikováno v: Monatshefte für Chemie - Chemical Monthly. 138:505-509

Reactions of two cyclic amidrazones, the 6-methyl and 6-phenyl derivatives of 7-hydrazinotetrazolo[1,5-b][1,2,4]triazines with mono- and dicarbonyl compounds afforded various heterocyclic systems. Thus, acetic acid, benzoyl chloride, or ethyl chlorof

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca7c031a2934fe1499035dd0dd500703
https://doi.org/10.1007/s00706-007-0599-0

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Synthesis of 1,3,4-Oxadiazole AcycloC-Nucleosides Bearing 5-Methylthio{7-substituted-1,2,4-triazolo[1,5-d]tetrazol-6-yl}moieties

Autor: Mamdouh A. M. Taha, Susan M. El-Badry

Publikováno v: Journal of the Chinese Chemical Society. 53:1181-1188

Oxidative cyclization of the sugar hydrazones (3 a-f ) derived from {7H-1,2,4-triazolo[1,5-d]tetrazol-6-ylsulfanyl}acetic acid hydrazide (1) and aldopentoses 2 a-c or aldohexoses 2 d-f with bromine in acetic acid in the presence of anhydrous sodium a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::47a3ad4a1883df15e64672989164e699
https://doi.org/10.1002/jccs.200600156

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Synthesis of Some New Heterobicyclic Nitrogen Systems Bearing 7H-1,2,4-Triazolo[1,5-d]tetrazol-6-yl Moiety for Biological Interest

Autor: Mamdouh A. M. Taha

Publikováno v: Journal of the Chinese Chemical Society. 52:137-140

Reaction of 6-mercapto-7H-1,2,4-triazolo[1,5-d]tetrazole (1) wtih 1,2-phenylenediamine afforded N-{7H-1,2,4-triazolo[1,5-d]tetrazol-6-yl}-1,2-phenylenediamine which was cyclized to benzimidazolyl-1,2,4-triazolo[1,5-d]tetrazoles using various one-carb

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7b8ecf0654c9ed5036a485a272ec05a
https://doi.org/10.1002/jccs.200500021

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