Výsledky vyhledávání - "Abdullah A. Al-Ahmadi"

Effect of Calcination Temperature on the Morphology of Carbon Nanosphere Synthesized from Polymethylmethacrylate

Autor: Tawfik A. Saleh, Mohammed A. Al-Daous, Abdullah F. Al-Ahmadi

Publikováno v: Advanced Materials Research. 974:55-59

In this work, hollow carbon nanospheres (HCNs) were synthesized by carbonizing core/shell particles of polymethylmethacrylate (PMMA)/ resorcinol formaldehyde. The core/shell particles were prepared using emulsion polymerization; polymethylmethacrylat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a244b26053560950c67b3d9747d70e6a
https://doi.org/10.4028/www.scientific.net/amr.974.55

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Thermal fragmentation and rearrangement of N-arylbenzamidoxime and O-phenylsulfonyloxime derivatives

Autor: Abdullah A. Al-Ahmadi, Abd El-Aal M. Gaber, Alla O. Baryyan

Publikováno v: Journal of Analytical and Applied Pyrolysis. 82:110-116

Thermal fragmentation of N -arylbenzamide oximes I , II (Ar = Ph, p -tolyl) under nitrogen gives rise to benzanilide and 2-phenylbenzoxazole as the major products, in addition to benzonitrile, arylamines, phenols, benzoic acid, o - and p -aminophenol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02aac1ae14230ee74e0404226757b088
https://doi.org/10.1016/j.jaap.2008.02.003

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SYNTHESIS AND CYCLIZATION OF 3-[3′(2′-SPIROTHIAZOLIDIN-4′-ONYL)] QUINAZOLIN-4-ONE DERIVATIVES

Autor: Abdullah A. Al-Ahmadi, Fatimah A. Aquily, Maher F. El-Zohry

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 175:1-14

The reaction of 3-(3H)-iiminoquinazolin-4-one derivatives 4a-c with 2-spiro-1,3-oxathio-Ian-5-one derivatives 7a-f in ethanol yielded 3-[3′(2′-spirothiazolidin-4′-one)Jquinazolin-4-one derivatives 8a-r in excellent yield. Cyclization of compoun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a301473e4302e25685afecbee1c88b66
https://doi.org/10.1080/10426500108040252

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Synthesis of bispiroheterocyclic systems as antimicrobial agents via the reaction of 2-(cycloalkylidene)-1-thia-4-azaspiro[4.4]-nonan-3-one and/or [4.5] decan-3-one with hydrazines, hydroxylamine, urea and thiourea derivatives

Autor: Abdullah A. Al-Ahmadi

Publikováno v: Journal of Chemical Technology & Biotechnology. 65:200-206

1-Oxa-4-thiaspiro[4.4]nonan-2-one (1) and/or 1-oxa-4-thiaspiro[4.5]-decan-2-one (2) reacted with 1-naphthylamine to afford 1-thia-4-(1-naphthyl)-4-azaspiro[4.4]nonan-3-one (3) and/or l-thia-4-(1-naphthyl)-4-azaspiro[4.5]decan-3-one (4). Reactions of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb6be45ea7c5c87a8874a30970fc48bb
https://doi.org/10.1002/(sici)1097-4660(199602)65:2<200::aid-jctb407>3.0.co

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Regiocontrolled syntheses of some new spiro[polycyclic-1?-isothiochroman]-4?-one derivatives

Autor: Maher F. El-Zohry, Abdullah A. Al-Ahmadi

Publikováno v: Heteroatom Chemistry. 7:171-176

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c06408f362c9468e17af202177354d6e
https://doi.org/10.1002/(sici)1098-1071(199605)7:3<171::aid-hc2>3.0.co

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Synthesis of some new spiroheterocyclic pyrylium salts related to 1-oxa-4-thiaspiro[4.4] nonan-2-one and/or [4.5]decan-2-one as antimicrobial agents

Autor: Maher F. El-Zohry, Abdullah A. Al-Ahmadi

Publikováno v: Journal of Chemical Technology AND Biotechnology. 62:366-372

1-Oxa-4-thiaspiro[4.4]nonan-2-one (1a) and/or 1-oxa-4-thiaspiro[4.5] decan-2-one (1b) were reacted with aniline and/or p-chloroaniline to afford the corresponding spirothiazolidinones (2a–d). Reaction of 2a–d with chalcones gave 2-(α – paracyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a8faea7dc810e00ab0b6648132394611
https://doi.org/10.1002/jctb.280620409

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SYNTHESIS OF SOME NEW FUSED SPIROHETEROCYCLIC SYSTEMS RELATED TO THIAZOLOPYRANS, THIAZOLOTHIOPYRANS AND THIAZOLOPYRIDINES

Autor: Abdullah A. Al-Ahmadi, Maher F. El-Zohry

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 97:35-46

1-Oxa-4-thiaspiro[4.4]nonan-2-one and/or 1-oxa-4-thiaspiro[4.5]decan-2-one were reacted with aniline to give the corresponding spirothiazolidinones(1a, b). Reaction of 1a, b with chalcones yielded 2-(α-aracylbenzyl)-4-phenyl-1-thia-4-azaspiro[4.4]no

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba34da5cc5d05a23f31d0533026ad3be
https://doi.org/10.1080/10426509408020725

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