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Synthesis, structural and antimicrobial studies of binary and ternary complexes of a new tridentate thiosemicarbazone. Future Med Chem 2018; 10:2507-2519. [PMID: 30499339 DOI: 10.4155/fmc-2018-0194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A new thiosemicarbazone ligand was synthesized and characterized using spectroscopic techniques (UV-Vis and IR) and synchrotron x-ray powder diffraction. With M2+ = Mn2+, Zn2+ and Cd2+, coordination compounds of the type (M[L]2) were isolated. In the presence of sodium dithiocarbamate salts (NadiEtdtc.3H2O = sodium diethyldithiocarbamate trihydrate and Napipdtc = sodium piperidinedithiocarbamate), Zn2+ and Cd2+ were able to form ternary octahedral complexes where each metal binds a deprotonated (thiosemicarbazone) ligand, a monobasic dithiocarbamate ligand and a water molecule. In vitro biological evaluation tests of the free HL ligand and its metal complexes against selected fungal and bacterial cultures were performed. Compared with HL, the complexes displayed enhanced biological activities and ternary Zn (II) complexes displayed comparable antibacterial activities to the chloramphenicol standard.
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Panda SS, Girgis AS, Prakash A, Khanna L, Khanna P, Shalaby EM, Fawzy NG, Jain SC. Protective effects of Aporosa octandra bark extract against D-galactose induced cognitive impairment and oxidative stress in mice. Heliyon 2018; 4:e00951. [PMID: 30761365 PMCID: PMC6286303 DOI: 10.1016/j.heliyon.2018.e00951] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 09/20/2018] [Accepted: 11/15/2018] [Indexed: 11/17/2022] Open
Abstract
Aporosa octandra (Buch.-Ham. ex D.Don) Vickery is a native species of India. Different parts of the plant are used for the medicinal purpose by the tribal peoples of south-eastern part of India. However, the biological properties of A. octandra have not been studied well. The extracts obtained from the bark of A. octandra were evaluated to determine their protective effect on cognitive impairment and oxidative stress in mice induced by D-galactose using the standard protocol. Different dosages of extract AOE-4 (100, 200, and 300 mg/kg, p.o.) were administered to mice, which were previously treated for six weeks with D-galactose (100 mg/kg s.c.). The D-galactose-induced mice showed significantly impaired cognitive behavior, i.e., oxidative defense, compared to the sham group. Six weeks of treatment with A. octandra extract AOE-4 (100, 200 and 300 mg/kg, p.o.) considerably improved the cognitive behavior and oxidative impairment of mice compared to the control alone (D-galactose). For the phytochemical investigation, the bark of A. octandra was successively extracted with dichloromethane and methanol. The chemical constituents of A. octandra were isolated by multiple column chromatography and characterized by different spectral analyses. (R)-Coclaurine (AO-5), an alkaloid, was isolated along with two other compounds from the AOE-4 extract; three more compounds were also isolated from the AOE-1 extract of the bark of A. octandra. All the compounds were isolated for the first time from the bark of A. octandra, and their structures were established by detailed spectral studies. The structure of compound AO-5 was also investigated and confirmed by X-ray diffraction and DFT studies. This study highlights the protective effect of A. octandra bark extract against D-galactose-induced biochemically dysfunction in mice. (R)-Coclaurine (AO-5) was isolated as one of the major components of A. octandra bark from AOE-4 extract; this compound could be further evaluated for the development of new potential drug candidates.
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Affiliation(s)
- Siva S Panda
- Department of Chemistry and Physics, Augusta University, Augusta, GA 30912, USA.,Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Adel S Girgis
- Department of Pesticide Chemistry, National Research Centre, Dokki, Giza 12622, Egypt
| | - Atish Prakash
- Division of Pediatric CNS Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Leena Khanna
- Department of Chemistry, University of Delhi, Delhi 110007, India.,Guru Gobind Singh Indraprastha University, Sector-16 C, Dwarka, New Delhi 110078, India
| | - Pankaj Khanna
- Department of Chemistry, University of Delhi, Delhi 110007, India.,Acharya Narendra Dev College, University of Delhi, Govindpuri, Kalkaji, New Delhi 110019, India
| | - ElSayed M Shalaby
- X-Ray Crystallography. Lab., Physics Division, National Research Centre, Dokki, Giza 12622, Egypt
| | - Nehmedo G Fawzy
- Department of Pesticide Chemistry, National Research Centre, Dokki, Giza 12622, Egypt
| | - Subhash C Jain
- Department of Chemistry, University of Delhi, Delhi 110007, India
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Synthesis & molecular modeling studies of bronchodilatory active indole–pyridine conjugates. Future Med Chem 2018; 10:1787-1804. [DOI: 10.4155/fmc-2018-0039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
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 of 2-[(1-alkyl-1H-indol-3-yl)methylene]malononitriles 4a,b with the corresponding ketone-containing compounds (5a–f, 7a–c and 9a,b) in the presence of sodium alkoxide. Single (6l, 8 g) and powder (6k, 8d) x-ray studies supported the structures. Results: Histamine precontracted isolated tracheal rings of guinea pig exhibited the potent bronchodilation properties of 6c (about double-fold potency relative to the standard reference, theophylline). Some of the synthesized conjugates (8d, 6c, 6f and 6e) revealed promising reduction of IL-8 production during lipopolysaccharide-induced airway inflammatory bioassay. Computational studies (3D pharmacophore, 2D-QSAR ‘quantitative structure–activity relationship’) showed high approximations to the bronchodilation properties and explained the parameters controlling biological observations.
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Synthesis, characterization, and cytotoxic activity of some new 1,3,4-trisubstituted pyrazoles against diverse tumor cell lines. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2153-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Girgis AS, Aziz MN, Shalaby EM, Asaad FM, Farag IA. Synthesis and X-ray Studies of Novel Azaphenanthrenes. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15183538282993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Two azaphenanthrenes were synthesised by a facile synthetic pathway and characterised by X-ray crystallography. Molecular packing of 4-(2,4-dichlorophenyl)-2-methoxy-5,6-dihydrobenzo[ h]quinoline-3-carbonitrile exhibits C–H…N and C–H…Cl hydrogen bonds in addition to intermolecular C–H…π, Cl…π and π…π (π-ring) stacking interactions. However, molecules of the 2-ethoxy derivative are linked into chains by one hydrogen bond of the C–H…N type and the crystal structure reveals an intermolecular C–H…π (π-ring) interaction. Computational studies by AM1, PM3, and density functional theory (DFT) techniques provide good approximations to the experimental X-ray data. The root mean square errors between the experimental and calculated bond lengths using AM1, PM3 and DFT methods for the 2-methoxy and 2-ethoxy derivatives are 0.0187, 0.0193, 0.0120 and 0.0197, 0.0195 and 0.0116 respectively.
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Affiliation(s)
- Adel S. Girgis
- Pesticide Chemistry Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - Marian N. Aziz
- Pesticide Chemistry Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - ElSayed M. Shalaby
- X-Ray Crystallography Laboratory, Physics Division, National Research Centre, Dokki, Giza 12622, Egypt
| | - Fahmy M. Asaad
- Pesticide Chemistry Department, National Research Centre, Dokki, Giza 12622, Egypt
| | - I.S. Ahmed Farag
- X-Ray Crystallography Laboratory, Physics Division, National Research Centre, Dokki, Giza 12622, Egypt
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Galal AMF, Shalaby EM, Abouelsayed A, Ibrahim MA, Al-Ashkar E, Hanna AG. Structure and absolute configuration of some 5-chloro-2-methoxy-N-phenylbenzamide derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 188:213-221. [PMID: 28715689 DOI: 10.1016/j.saa.2017.06.068] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 06/05/2017] [Accepted: 06/30/2017] [Indexed: 06/07/2023]
Abstract
The absolute configuration of 5-chloro-2-methoxy-N-phenylbenzamide single crystal [compound (1)] and the effect of introducing -[CH2]n-, n=1,2 group adjacent to the amide group [compounds (2) and (3)], were studied. Furthermore, the replacement of the methoxy group with a hydroxy group [compound (4)] was defined. Proton and carbon-13 NMR spectrometer were used to record the structural information of the prepared compounds. X-ray single crystal diffractometer were used to elucidate the 3D structural configurations. Intensity data for the studied compounds were collected at room temperature. The X-ray data prove that compound (1) is almost planar, with maximum r.m.s. deviations of 0.210(3)Å corresponds to C13. This planarity starts to disturb by adding -[CH2]n-, n=1,2 groups between the NH group and the phenyl ring in compounds (2) and (3), respectively. By replacing the OCH3 group by an OH group in compound (4), the plane of the chlorophenyl moiety is nearly perpendicular to that of the phenyl ring. Such new structural configurations were further illustrated by the infrared, and ultraviolet-visible spectroscopy measurements in the frequency range 400-4000cm-1 and 190-1100nm, respectively. Spectroscopic analyses were verified with the help of molecular modeling using density functional theory. The estimated total dipole moment for the prepared compounds reflects its ability to interact with its surrounding molecules. The higher dipole moment for a given structures is combined with the higher reactivity for potential use in medicinal applications.
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Affiliation(s)
- Alaaeldin M F Galal
- Chemistry of Natural Compounds Department, Drug and Pharmaceutical Industries Research Division, National Research Centre, 33 El Bohouth st. (former El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt
| | - Elsayed M Shalaby
- X-Ray Crystallography Laboratory, Physics Division, National Research Centre, 33 El Bohouth st. (former El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt
| | - Ahmed Abouelsayed
- Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (fromer El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt.
| | - Medhat A Ibrahim
- Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (fromer El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt
| | - Emad Al-Ashkar
- Spectroscopy Department, Physics Division, National Research Centre, 33 El Bohouth st. (fromer El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt
| | - Atef G Hanna
- Chemistry of Natural Compounds Department, Drug and Pharmaceutical Industries Research Division, National Research Centre, 33 El Bohouth st. (former El Tahrir st.), Dokki, P.O. 12622, Giza, Egypt
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Shalaby EM, Srour AM, Panda SS, George RF, Fitch AN, Girgis AS. Synthesis, X-ray powder diffraction and DFT-D studies of indole-based compounds. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/zkri-2017-2106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Four indole-based compounds have been synthesized and their crystal structures determined using high-resolution synchrotron powder X-ray diffraction. In vacuo density function theory (DFT) optimization has been used in building initial molecular models for structure solution with the help of the Cambridge structure database. All four compounds were found to crystallize in the monoclinic space group P21/c. Dispersion-corrected DFT (DFT-D) has been used for experimental crystal structure validation with acceptable agreement found between the DFT-optimized and final refined structures. Three of the compounds exhibit bronchodilation properties with potency comparable to the theophylline (standard reference).
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Affiliation(s)
- ElSayed M. Shalaby
- X-Ray Crystallography Lab., Physics Division, National Research Centre , Dokki, Giza 12622 , Egypt
| | - Aladdin M. Srour
- Therapeutical Chemistry Department, National Research Centre , Dokki, Giza 12622 , Egypt
| | - Siva S. Panda
- Department of Chemistry and Physics , Augusta University , Augusta, GA 30912 , USA
| | - Riham F. George
- Pharmaceutical Chemistry Department, Faculty of Pharmacy , Cairo University , Cairo , Egypt
| | - Andrew N. Fitch
- European Synchrotron Radiation Facility , CS40220 , 38043 Grenoble Cedex 9 , France
| | - Adel S. Girgis
- Pesticide Chemistry Department, National Research Centre , Dokki, Giza 12622 , Egypt
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Synthesis and 2D-QSAR Study of Active Benzofuran-Based Vasodilators. Molecules 2017; 22:molecules22111820. [PMID: 29072621 PMCID: PMC6150240 DOI: 10.3390/molecules22111820] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 10/22/2017] [Indexed: 02/03/2023] Open
Abstract
A new series of 2-alkyloxy-pyridine-3-carbonitrile-benzofuran hybrids (4a–x) was synthesized. All the new derivatives were examined via the standard technique for their vasodilation activity. Some of the investigated compounds exhibited a remarkable activity, with compounds 4w, 4e, 4r, 4s, 4f and 4g believed to be the most active hits in this study with IC50 values 0.223, 0.253, 0.254, 0.268, 0.267 and 0.275 mM, respectively, compared with amiodarone hydrochloride, the reference standard used (IC50 = 0.300 mM). CODESSA PRO was employed to obtain a statistically significant 2-Dimensional Quantitative Structure Activity Relationship (2D-QSAR) model describing the bioactivity of the newly synthesized analogs (N = 24, n = 4, R2 = 0.816, R2cvOO = 0.731, R2cvMO = 0.772, F = 21.103, s2 = 6.191 × 10−8).
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Ismail NSM, George RF, Serya RAT, Baselious FN, El-Manawaty M, Shalaby EM, Girgis AS. Rational design, synthesis and 2D-QSAR studies of antiproliferative tropane-based compounds. RSC Adv 2016. [DOI: 10.1039/c6ra21486j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel tropane-based compounds were synthesized exhibiting antiproliferative properties against HepG2 and MCF7 carcinoma cell lines.
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Affiliation(s)
- Nasser S. M. Ismail
- Pharmaceutical Chemistry Department
- Faculty of Pharmaceutical Sciences and Pharmaceutical Industries
- Future University
- Cairo 12311
- Egypt
| | - Riham F. George
- Pharmaceutical Chemistry Department
- Faculty of Pharmacy
- Cairo University
- Cairo
- Egypt
| | - Rabah A. T. Serya
- Pharmaceutical Chemistry Department
- Faculty of Pharmacy
- Ain Shams University
- Cairo
- Egypt
| | - Fady N. Baselious
- Research and Development Department
- Global Napi Pharmaceuticals
- 6th October City
- Egypt
| | - May El-Manawaty
- Pharmacognosy Department
- National Research Centre
- Giza 12622
- Egypt
| | - ElSayed M. Shalaby
- X-Ray Crystallography Lab
- Physics Division
- National Research Centre
- Giza 12622
- Egypt
| | - Adel S. Girgis
- Pesticide Chemistry Department
- National Research Centre
- Giza 12622
- Egypt
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George RF, Panda SS, Shalaby ESM, Srour AM, Farag ISA, Girgis AS. Synthesis and molecular modeling studies of indole-based antitumor agents. RSC Adv 2016. [DOI: 10.1039/c6ra07061b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Potent antitumor active (HeLa, cervical carcinoma cell line) indole-based compounds were synthesized via azomethine ylide 1,3-dipolar cycloaddition with 3,5-arylidene-4-piperidones.
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Affiliation(s)
- Riham F. George
- Pharmaceutical Chemistry Department
- Faculty of Pharmacy
- Cairo University
- Cairo
- Egypt
| | - Siva S. Panda
- Department of Chemistry & Physics
- Augusta University
- Augusta
- USA
| | - El-Sayed M. Shalaby
- X-Ray Crystallography Lab
- Physics Division
- National Research Centre
- Giza 12622
- Egypt
| | - Aladdin M. Srour
- Therapeutical Chemistry Department
- National Research Centre
- Giza 12622
- Egypt
| | - I. S. Ahmed Farag
- X-Ray Crystallography Lab
- Physics Division
- National Research Centre
- Giza 12622
- Egypt
| | - Adel S. Girgis
- Pesticide Chemistry Department
- National Research Centre
- Giza 12622
- Egypt
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Shalaby EM, Girgis AS, Farag H, Mabied AF, Fitch AN. Synthesis, X-ray powder diffraction and DFT calculations of vasorelaxant active 3-(arylmethylidene)pyrrolidine-2,5-diones. RSC Adv 2016. [DOI: 10.1039/c6ra24302a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two 3-(arylmethylidene)pyrrolidine-2,5-diones, 12a and 12b, were synthesized and characterized by powder X-ray diffraction utilizing a high-resolution synchrotron X-ray powder technique as well as DFT calculations.
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Affiliation(s)
- ElSayed M. Shalaby
- European Synchrotron Radiation Facility
- 38043 Grenoble Cedex 9
- France
- X-Ray Crystallography Lab
- Physics Division
| | - Adel S. Girgis
- Pesticide Chemistry Department
- National Research Centre
- Dokki
- Egypt
| | - Hanaa Farag
- Pesticide Chemistry Department
- National Research Centre
- Dokki
- Egypt
| | - Ahmed F. Mabied
- X-Ray Crystallography Lab
- Physics Division
- National Research Centre
- Dokki
- Egypt
| | - Andrew N. Fitch
- European Synchrotron Radiation Facility
- 38043 Grenoble Cedex 9
- France
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