A5065686586- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Synthesis of heterocyclic compounds
- Synthesis and biological activity
- Crystal structures of chemical compounds
- Synthesis of Organic Compounds
- Synthesis and Reactions of Organic Compounds
- Synthesis and Reactivity of Heterocycles
- Synthesis and Characterization of Heterocyclic Compounds
- Metal complexes synthesis and properties
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Magnetic Properties and Synthesis of Ferrites
- Synthesis and Biological Evaluation
- Bioactive Compounds and Antitumor Agents
- Solid-state spectroscopy and crystallography
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Chalcogenide Semiconductor Thin Films
- Lanthanide and Transition Metal Complexes
- Organic Chemistry Cycloaddition Reactions
- Thermal and Kinetic Analysis
- Magnetism in coordination complexes
National Research Centre
2009-2019
IBM (Egypt)
2016
United States Department of State
2014
Tokyo Institute of Technology
2011
Cairo University
2011
Ain Shams University
2009
National Water Research Center
1990-2009
Lomonosov Moscow State University
1993
University of Bonn
1988
QSAR study describes the anti-neoplastic spiro-alkaloids with relevant molecular descriptors using CODESSA III software. The dispiro[3H-indole-3,2'-pyrrolidine-3',3"-piperidines] 24-48 were synthesized via [3 + 2]-cycloaddition reaction of azomethine ylides, (generated in situ decarboxylative condensation isatins 21-23 sarcosine) and 3E,5E-1-alkyl-3,5-bis(arylmethylidene)-4-piperidones 10-20. Some analogues exhibited promising antitumor properties against HELA (cervical), HEPG2 (liver),...
DFT studies of an anti-proliferative active spiro-oxindole against diverse tumor cell lines were reported.
BiFe1-xCoxO3 (x = 0, 0.03, 0.05 and 0.1) symbolic as (BFO, BF3CO, BF5CO BF10CO) in powder form has been prepared by sol-gel technique using ethylenediamine tetraacetic acid (EDTA) a chelating agent. X-ray diffraction (XRD) FTIR analysis showed rhombohedra distorted BiFeO3 structure with compressive lattice distortion induced the Co substitution at Fe sites. The transmission electron microscope (TEM) shows irregular particles. additive of cobalt oxide led to grains refining giving following...
Potent antitumor active (HeLa, cervical carcinoma cell line) indole-based compounds were synthesized<italic>via</italic>azomethine ylide 1,3-dipolar cycloaddition with 3,5-arylidene-4-piperidones.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at glance that was extracted from about 200 leading journals. To access of an article which published elsewhere, please select “Full Text” option. The original trackable via the “References”
Abstract Two 5 H -indeno[1,2- b ]pyridines, 7a and 7b , were synthesized characterized by X-ray crystallography. In the molecular packing, molecules of are linked into chains C–H···N hydrogen bond which, in turn, connected H···π, N···π, Cl···π π···π interactions. crystal structure C–H···Cl interactions as well a set N···π The structures studied theory using AM1, PM3 DFT. basic difference between theoretical experimental was found relative orientation dichlorophenyl ring attached to...
The structural, dielectric and magnetic properties of pure Fe-Co co-doped Ba0.9Sr0.1TiO3, (Ba(1-x)SrxTiO3, where (x = 0.10) (Ba0.9Sr0.1Ti(1-x-y)FexCoyO3), 0.1, y 0) 0 0.5, 0.5) in powder form, abbreviated as (BST) (BST10FO), (BST10CO) (BST5F5CO), respectively were prepared by a modified sol gel technique. Crystallization, surface morphology electrical behavior BST are improved Fe3+ Co2+ ions with optimized grain size. Phase identification using X-ray diffraction will be studied transmission...
Abstract Hydrazones 12a–c and ketazines 13a–c were prepared by the reaction of ketones 11a–c with hydrazine hydrate depending on temperature time. Some ketone (aryl)hydrazone derivatives 14a,c,e reacted thionyl chloride to afford chlorothiadiazoline 15a–c . Surprisingly, chlorine atom in latter compounds was found undergo smooth nucleophilic substitution, boiling these absolute ethanol gave corresponding ethoxythiadiazoline 16a–c The structure 16b confirmed single crystal X‐ray...
A series of ferrite samples 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, were found to have cubic spinel structure. On applying full pattern fitting Rietveld method using FullProf program, exact coordinates atoms, unit cell dimensions, atom occupation factors, isotropic temperature profile shape parameters as well interatomic distances been determined. It was that lattice parameter decreases with increasing Mg...
The racemic title compound, C30H26Cl3N3O2, comprises two spiro links, the first connecting piperidine and pyrrolidine rings other indole rings. ring adopts a half-chair conformation, while has an envelope conformation with unsubstituted C atom as flap. dihedral angles between p-Cl-substituted benzene are 33.13 (14) 54.11 (14)°. In crystal, mol-ecules form inversion dimers through pairs of N-H⋯O hydrogen bonds [graph set R 2 (2)(8)]. Aromatic C-H⋯O extend these into ribbon structure,...
The title compound, C 30 H 28 ClN 3 O 2 , features two spiro links, one connecting the piperidine and pyrrolidine rings, other ring indole residue. configuration about ethene bond is E . adopts a half-chair conformation where atom connected to spiro-C lies 0.713 (3) Å out of plane remaining five atoms (r.m.s. deviation = 0.086 Å). has an envelope with flap being methylene atom. Centrosymmetric eight-membered {...HNCO} amide synthons feature in crystal packing. These are consolidated into...
A series of ferrite samples the chemical composition Cu 0.7 (Zn 0.3-x Mg x )Al 0.3 Fe 1.7 O 4 (x=0.05,0.1, 0.15, 0.2 and 0.25), prepared by ceramic technique at 1000°C, were found to have cubic spinel structure.On applying full pattern fitting Rietveld method using FullProf program, exact coordinates atoms, unit cell dimensions, atom occupation factors, interatomic distances as well crystallite size residual microstrain been determined.It was that lattice parameter decreases with increasing...
Reaction of cyanoacetohydrazones 3a,b with a variety arylidenemalononitriles 5a - c under the effect piperidine basic catalysis afforded exclusively corresponding 6-amino-1,2-dihydro-1,4- disubstituted-2-oxo-3,5-pyridinedicarbonitriles 6a f in high regioselectivity. A chemical confirmation for proposed structure was achieved through reaction ylidenes 8 malononitrile conditions, which yielded 6 accompanied 3. Refluxing 3b acetic anhydride gave...
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 reaction 4′H,5H-trispiro[cyclohexane-1,2′-chromene-3′,2″-[1,3,4]oxadithiino[5,6-c]chromene-5″,1″′-cyclohexan]-4′-one (1) with nitrilimines (generated in situ via triethylamine dehydrohalogenation corresponding hydrazonoyl chlorides 2a-c) refluxing dry toluene. Single crystal X-ray diffraction studies 3a,b add support for established...
Two spiro links are found in the title compound, C 31 H 28 Cl 3 N O 2 , one connecting piperidine and pyrrolidine rings, other ring indole residue. The adopts a half-chair conformation, which atom connected to spiro-C lies 0.741 (3) Å out of plane remaining five atoms (r.m.s. deviation = 0.053 Å). has an envelope conformation with flap being methylene atom. Centrosymmetric eight-membered {...HNCO} amide dimers most significant feature crystal packing. These into layers parallel (-120) by...