ElSayed M. Shalaby

ORCID: 0000-0002-0463-791X
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About
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Research Areas
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Crystallography and molecular interactions
  • Synthesis and biological activity
  • Synthesis and Biological Evaluation
  • Crystal structures of chemical compounds
  • Synthesis of heterocyclic compounds
  • Metal complexes synthesis and properties
  • Metal-Organic Frameworks: Synthesis and Applications
  • Structural and Chemical Analysis of Organic and Inorganic Compounds
  • Organometallic Compounds Synthesis and Characterization
  • Synthesis and Reactivity of Sulfur-Containing Compounds
  • Synthesis and Characterization of Heterocyclic Compounds
  • Chemical Reaction Mechanisms
  • Quinazolinone synthesis and applications
  • Bioactive Compounds and Antitumor Agents
  • Synthesis and Reactions of Organic Compounds
  • Synthesis of Organic Compounds
  • Organophosphorus compounds synthesis
  • Computational Drug Discovery Methods
  • Phenothiazines and Benzothiazines Synthesis and Activities
  • Cancer therapeutics and mechanisms
  • Antioxidants, Aging, Portulaca oleracea
  • Synthetic Organic Chemistry Methods
  • Enzyme Structure and Function

National Water Research Center
2019-2021

National Research Centre
2012-2020

IBM (Egypt)
2016-2020

Elettra-Sincrotrone Trieste S.C.p.A.
2018-2020

European Synchrotron Radiation Facility
2016

United States Department of State
2014

University of Coimbra
2013

LIP - Laboratory of Instrumentation and Experimental Particle Physics
2013

An anti-neoplastic fluoro-substituted dispiro-oxindole is described along with theoretical studies and single crystal X-ray analysis.

10.1039/c4ra13433h article EN RSC Advances 2015-01-01

DFT studies of an anti-proliferative active spiro-oxindole against diverse tumor cell lines were reported.

10.1039/c5nj01109d article EN New Journal of Chemistry 2015-01-01

Novel tropane-based compounds were synthesized exhibiting antiproliferative properties against HepG2 and MCF7 carcinoma cell lines.

10.1039/c6ra21486j article EN RSC Advances 2016-01-01

Orange prismatic crystals of the supramolecular coordination polymer (SCP) ∞ 3 [Cu(CN) 2 (Me Sn)(Pyz)], SCP 1 , were synthesized using a self‐assembly method under ambient conditions. Nanosized was obtained same molar ratio in water by ultrasonic irradiation. characterized single‐crystal X‐ray diffraction, elemental analysis, thermal analysis and Fourier transform infrared spectroscopy. its nanosized particles also examined powder X‐ay diffraction scanning electron microscopy. The...

10.1002/aoc.5114 article EN Applied Organometallic Chemistry 2019-07-24

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.

10.1039/c6ra07061b article EN RSC Advances 2016-01-01

Abstract The reactions of 5-azido-3-methyl-1-phenyl-1 H -pyrazole-4-carbaldehyde (azidopyrazole) with several classes organophosphorus reagents: phosphonium ylides, Wittig-Horner reagents, dialkylphosphonates, trialkylphosphites, tris(dialkylamino)phosphanes, triphenylstibane, triphenylarsane, and Lawesson’s reagent are reported. Structural reasoning for the new products was based on compatible analytical spectral data. cytotoxic activity most evaluated against human breast carcinoma cell...

10.1515/znb-2015-0187 article EN Zeitschrift für Naturforschung B 2016-04-12

3,5-Bis(arylidene)-N-substituted-4-oxo-piperidine-1-carboxamides 24-51 were synthesized as curcumin mimics in a facile pathway through reaction of 3,5-bis(arylidene)-4-piperidones with the appropriate isocyanate presence triethylamine. The 3E,5E'-stereochemical configuration was conclusively supported by single crystal X-ray studies compounds 25 and 34. Most piperidinecarboxamides showed high anti-proliferative properties potency higher than that 5-fluorouracil (clinically approved drug...

10.1039/c9ra05661k article EN cc-by RSC Advances 2019-01-01

In the title mol-ecule, C(27)H(24)N(2)O(2), pyrrolidin-2-one ring is almost planar (r.m.s. deviation = 0.003 Å), pyrrolidine has an envelope conformation (the N atom flap atom) and cyclo-penta-none twisted about C(q)-C(m) bond (q quaternary m methylene). The ketone O atoms are directed to opposite sides of mol-ecule. Supra-molecular chains along a axis formed in crystal packing mediated by N-H⋯N C-H⋯O inter-actions. These connected into layers ab plane via C-H⋯π

10.1107/s1600536812028012 article EN cc-by Acta Crystallographica Section E Structure Reports Online 2012-06-22

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...

10.1515/zkri-2015-1892 article EN Zeitschrift für Kristallographie - Crystalline Materials 2016-03-01

A set of dispiro[indoline-3,2'-pyrrolidine-3',3''-pyrrolidines] 8a-l was regioselectively synthesized utilizing multi-component azomethine cycloaddition reaction 3-(arylmethylidene)pyrrolidine-2,5-diones 5a-e, isatins 6a-c and sarcosine 7. Single crystal X-ray studies 8c add conclusive support for the structure. Compounds 8e 8g reveal cholinesterase inhibitory properties with promising efficacy against both AChE BChE were found to be more selective towards than as indicted by selectivity...

10.1039/d0ra03064c article EN cc-by RSC Advances 2020-01-01

A new thiosemicarbazone ligand was synthesized and characterized using spectroscopic techniques (UV-Vis IR) synchrotron x-ray powder diffraction. With M2+ = Mn2+, Zn2+ Cd2+, coordination compounds of the type (M[L]2) were isolated. In presence sodium dithiocarbamate salts (NadiEtdtc.3H2O diethyldithiocarbamate trihydrate Napipdtc piperidinedithiocarbamate), Cd2+ able to form ternary octahedral complexes where each metal binds a deprotonated (thiosemicarbazone) ligand, monobasic water...

10.4155/fmc-2018-0194 article EN Future Medicinal Chemistry 2018-11-01

Pyrrolo-pyrazoles were obtained from the reaction between phosphacumulenes and aminoantipyrine, while with phosphaallene (hexaphenylcarbodiphosphorane ylide) afforded azaphosphole pyrazolo-phosphanylidene. The aminocoumarin carbaldehyde gave chromeno-phosphanylidene chromeno-pyridinone, when it was allowed to react phosphacumulenes. of chloroquinoline phosphacumulenes, phosphanylidenecyclobutane, resulted in formation oxaphosphetane, phosphanylidene ethenyl- oxaphosphetyl-quinoline....

10.3184/174751914x14179446629855 article EN Journal of Chemical Research 2014-12-01

Abstract A series of unexpected bis-coumarins have been synthesized by multicomponent reactions 4-hydroxycoumarin, aldehydes, and cyclic secondary amines in ethanol at room temperature. The chemical structures new compounds were identified 1 H, 13 C NMR, mass spectrometry. Furthermore, the molecular structure solid-state adduct 3,3′-[(4-methoxyphenyl)-methylene]bis(4-hydroxy-2 H -chromen-2-one) with morpholine (1:1) has confirmed single-crystal X-ray diffraction. cytotoxicity coumarin...

10.1515/znb-2017-0066 article EN Zeitschrift für Naturforschung B 2017-09-26

Two 3-(arylmethylidene)pyrrolidine-2,5-diones,<bold>12a</bold>and<bold>12b</bold>, were synthesized and characterized by powder X-ray diffraction utilizing a high-resolution synchrotron technique as well DFT calculations.

10.1039/c6ra24302a article EN RSC Advances 2016-01-01

3‐(2,4‐Dichlorophenyl)‐7‐[(2,4‐dichlorophenyl)methylidene]‐11‐methyl‐4‐phenyl‐4,5,11‐triazatricyclo[6.2.1.0*2,6*]undec‐5‐ene ( 3 ) was synthesized in a stereoselective manner. Single crystal X‐ray study of revealed that the structure belongs to triclinic system with space group . The is further stabilized by an intermolecular CH … π interaction. Molecular mechanics force field (MM + ), followed either semi‐empirical AM1 or PM3, used calculate optimized geometrical parameters determined...

10.1002/jhet.2440 article EN Journal of Heterocyclic Chemistry 2015-06-04

New host‐guest supramolecular coordination polymer catalyst 3 ∞ [Co(μ 2 CN) 5 (CN)(μ ‐Me Sn) (Me Sn)(H O)(qox)], SCP1 (qox = quinoxaline) has been synthesized and characterized by single crystal X‐ray diffraction, FT‐IR, U V /Visible fluorescence spectra, thermal elemental analyses. The tin atoms act as bridges connecting the Co (CN) 6 building blocks. structure of exhibits an unusual self‐coordinated 3D network with qox guest molecule. Also, nanosized1 \ was prepared under ultrasonic...

10.1002/aoc.5521 article EN Applied Organometallic Chemistry 2020-01-21

Aim: Synthesis of novel bronchodilatory active indole–pyridine conjugates. Results/methodology: Indole–pyridine conjugates (6a–n, 8a–i and 10a–c) were synthesized in a facile pathway through reaction 2-[(1-alkyl-1H-indol-3-yl)methylene]malononitriles 4a,b with the corresponding ketone-containing compounds (5a–f, 7a–c 9a,b) presence sodium alkoxide. Single (6l, 8 g) powder (6k, 8d) x-ray studies supported structures. Results: Histamine precontracted isolated tracheal rings guinea pig...

10.4155/fmc-2018-0039 article EN Future Medicinal Chemistry 2018-07-18

A set of vasorelaxant active 4-hydroxyquinazoline-4-carboxamides was obtained in a novel synthetic approach <italic>via</italic> secondary amine nucleophilic reaction with 2,3-dioxoindoline-1-carboxamides.

10.1039/c9ra04321g article EN cc-by RSC Advances 2019-01-01

∞ 3 [{Co(hmt) 2 (NCS) (H O) }{Co(NCS) 4 }(2H O)] supramolecular complex ( SC ) had been synthesized through self‐assembly reaction using the sonochemical method at ambient conditions. The structure was fully characterized by single‐crystal X‐ray diffraction and spectroscopic methods. consists of two separate distinct complexes containing crystallography chemically different Co II atoms, four thiocyanate ligands, hmt six coordinated water molecules, one uncoordinated molecule. (SCN) fragments...

10.1002/aoc.6159 article EN Applied Organometallic Chemistry 2021-01-06

Aporosa octandra (Buch.-Ham. ex D.Don) Vickery is a native species of India. Different parts the plant are used for medicinal purpose by tribal peoples south-eastern part However, biological properties A. have not been studied well. The extracts obtained from bark were evaluated to determine their protective effect on cognitive impairment and oxidative stress in mice induced D-galactose using standard protocol. dosages extract AOE-4 (100, 200, 300 mg/kg, p.o.) administered mice, which...

10.1016/j.heliyon.2018.e00951 article EN cc-by-nc-nd Heliyon 2018-11-01
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