Search Results - "Farag, I S Ahmed"

A facile regioselective synthesis of novel spiro-thioxanthene and spiro-xanthene-9′,2-[1,3,4]thiadiazole derivatives as potential analgesic and anti-inflammatory agents by Hafez, H.N., Hegab, M.I., Ahmed-Farag, I.S., El-Gazzar, A.B.A.

“…The 1,3-dipolar cycloaddition of nitrile imines to 9 H-thioxanthone-9-thione and 9 H-xanthone-9-thione afforded novel…”
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Role of Sr doping on transport and magnetic properties of bismuth ferrite in correlation with defect formation by Hegab, A. F., Ahmed Farag, I. S., EL-Shabiny, A. M., Nassaar, A. M., Ramadan, A. A., Moustafa, A. M.

“…Doped Bi 1−x Sr x FeO 3 samples were synthesized by solid state reaction method. Doping with alkaline earth metal (Sr) was used to suppress formation of second…”
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Structural analysis and role of cation distribution on the magnetic properties of single phase Ni-doped copper chromium ferrite by Moustafa, A. M., Farag, I. S. Ahmed, Abdellatif, M. H., Ahmed, M. A.

“…A series of single-phase spinel structure was prepared by the standard ceramic technique in order to study the effect of cation doping on the microstructure…”
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Synthesis, and QSAR analysis of anti-oncological active spiro-alkaloids by Girgis, Adel S, Panda, Siva S, Farag, I S Ahmed, El-Shabiny, A M, Moustafa, A M, Ismail, Nasser S M, Pillai, Girinath G, Panda, Chandramukhi S, Hall, C Dennis, Katritzky, Alan R

“…QSAR study describes the anti-neoplastic spiro-alkaloids with relevant molecular descriptors using CODESSA III software. The…”
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Regioselective synthesis, stereochemical structure, spectroscopic characterization and geometry optimization of dispiro[3H-indole-3,2′-pyrrolidine-3′,3″-piperidines] by Shalaby, ElSayed M., Girgis, Adel S., Moustafa, Aisha M., ElShaabiny, Aida M., El-Gendy, Bahaa El-Dien M., Mabied, Ahmed F., Ahmed Farag, I.S.

“…[Display omitted] •Dispiro-indole containing compounds were prepared in a regioselective manner.•Single crystal X-ray identify the stereochemical configuration…”
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Application of Rietveld Method to the Structural Characteristics of Substituted Copper Ferrite Compounds by Ahmed Farag, I.S., Ahmed, M.A., Hammad, S.M., Moustafa, A.M.

“…A series of ferrite samples of the chemical composition Cu0.7 (Zn0.3‐xMgx)Al0.3Fe1.7O4 [x=0.05, 0.1, 0.15 and 0.2], prepared by ceramic technique at 1000°C,…”
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Controlling polymorphic structures and investigating electric properties of Ca-doped zirconia using solid state ceramic method by Emam, W.I., Mabied, Ahmed F., Hashem, H.M., Selim, M.M., El-Shabiny, A.M., Ahmed Farag, I.S.

“…Structural study of Zr1−xCaxO2−x samples with x=0.01–0.15 were prepared using solid state ceramic method. X-ray diffraction analysis revealed a mixture of the…”
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Thickness-dependence of stoichiometry and microstructure characteristics in correlation with conductivity type of CdTe films by Ramadan, A.A, Abd-El Mongy, A, Ahmed Farag, I.S, El-Shabiny, A.M, Radwan, F.A, Ismail, H.I, Hashem, H.M

“…CdTe films were prepared by physical vapour deposition on a substrate at room temperature (RT) as well as on a cold (LT) one using low deposition rate. The…”
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5-Chloro-5′′-(4-chlorobenzylidene)-4′-(4-chlorophenyl)-1′′-ethyl-1′-methyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione by Farag, I. S. Ahmed, Girgis, Adel S., Ramadan, A. A., Moustafa, A. M., Tiekink, Edward R. T.

“…Two spiro links are found in the title compound, C 31 H 28 Cl 3 N 3 O 2 , one connecting the piperidine and pyrrolidine rings, and the other connecting the…”
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5-Chloro-5′′-[4-(dimethylamino)benzylidene]-4′-[4-(dimethylamino)phenyl]-1′,1′′-dimethyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione by Farag, I. S. Ahmed, Girgis, Adel S., Ramadan, A. A., Moustafa, A. M., Tiekink, Edward R. T.

“…The title compound, C 34 H 38 ClN 5 O 2 , has spiro links connecting the pyrrolidine ring and indole residue, as well as the piperidine and pyrrolidine rings…”
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Novel regioselective synthesis of 3′H,4H-spiro[chromene-3,2′-[1,3,4]thiadiazol]-4-one containing compounds by Hegab, Mohamed I., Girgis, Adel S., Ahmed-Farag, I. S.

“…A variety of 3″,5″‐diaryl‐3″H,4′H‐dispiro[cyclohexane‐1,2′‐chromene‐3′,2″‐[1,3,4]thiadiazol]‐4′‐ones 3a‐c were synthesized regioselectively through the…”
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Synthesis, characterization and impedance spectroscopy of the new material [(CH3) (C6H5) 3P] 2CoBr4: a member of the A2BX4 family by Mostafa, M. F., Youssef, A. A., El Dean, Th. Sh, Mostafa, A. M, Ahmed Farag, I. S.

“…The crystal structure of bis‐(methyltriphenylphosphonium) tetrabromocobaltate (II), [(C19H18P)2 CoBr4] is determined: Mr = 933.203, monoclinic, P21, a = 9…”
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Structural characteristics and electrical properties of copper doped manganese ferrite by Salah, L.M., Moustafa, A.M., Farag, I.S. Ahmed

“…A series of Mn1−xCuxFe2O4 ferrite samples with 0.2≤x≤0.5 were prepared using the co-precipitation method. X-ray analysis confirmed the formation of single…”
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5′′-Benzylidene-5-chloro-1′,1′′-dimethyl-4′-phenyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione by Farag, I. S. Ahmed, Girgis, Adel S., Ramadan, A. A., Moustafa, A. M., Tiekink, Edward R. T.

“…The title compound, C 30 H 28 ClN 3 O 2 , features two spiro links, one connecting the piperidine and pyrrolidine rings, and the other connecting the…”
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5-Chloro-5′′-(4-chlorobenzylidene)-4′-(4-chlorophenyl)-1′,1′′-dimethyldispiro[indoline-3,2′-pyrrolidine-3′,3′′-piperidine]-2,4′′-dione by Farag, I. S. Ahmed, Girgis, Adel S., Ramadan, A. A., Moustafa, A. M., Mabied, Ahmed F.

“…The racemic title compound, C 30 H 26 Cl 3 N 3 O 2 , comprises two spiro links, the first connecting the piperidine and pyrrolidine rings and the other…”
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Synthesis of Novel 2-Alkoxy-5H-benzo[6,7]cyclohepta[1,2-b]pyridine-3-carbonitriles by Girgis, Adel S., Ahmed-Farag, I. S.

“…Reaction of 6-arylmethylene-6,7,8,9-tetrahydro-5H-benzocyclo-hepten-5-ones (1) with malononitrile in the appropriate alcohol in the presence of sodium afforded…”
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On the Reaction of 3-Acetyl Coumarin with Alkyl Phosphites. Structural Confirmations Based on X-Ray Crystallography by Osman, Fayez H., El-Rahman, Naglaa M. Abd, El-Samahy, Fatma A., Farag, I. S. Ahmed

“…3-Acetyl coumarin ( 1 ) reacts with dialkyl phosphites at 100°;C for 8 h to give the phosphonates 2 . Under the same experimental conditions, 1 reacts with…”
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A Convenient Regioselective Synthesis of 6-Amino-2-oxo-3,5-pyridinedicarbonitriles by Girgis, Adel S., Hosni, Hanaa M., Ahmed-Farag, I. S.

“…Reaction of cyanoacetohydrazones 3a,b with a variety of arylidenemalononitriles 5a - c under the effect of piperidine basic catalysis afforded exclusively the…”
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5-Chloro-5''-(4-chloro-benzyl-idene)-4'-(4-chloro-phen-yl)-1',1''-dimethyldi-spiro-[indoline-3,2'-pyrrolidine-3',3''-piperidine]-2,4''-dione by Farag, I S Ahmed, Girgis, Adel S, Ramadan, A A, Moustafa, A M, Mabied, Ahmed F

“…The racemic title compound, C30H26Cl3N3O2, comprises two spiro links, the first connecting the piperidine and pyrrolidine rings and the other connecting the…”
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5-Chloro-5''-(4-chloro-benzyl-idene)-4'-(4-chloro-phen-yl)-1''-ethyl-1'-methyl-dispiro-[indoline-3,2'-pyrrolidine-3',3''-piperidine]-2,4''-dione by Farag, I S Ahmed, Girgis, Adel S, Ramadan, A A, Moustafa, A M, Tiekink, Edward R T

“…Two spiro links are found in the title compound, C31H28Cl3N3O2, one connecting the piperidine and pyrrolidine rings, and the other connecting the pyrrolidine…”
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