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  1. Article: Synthesis, DPPH Radical Scavenging, Cytotoxic Activity, and Apoptosis Induction Efficacy of Novel Thiazoles and Bis-thiazoles.

    Negm, Amr / Al-Faiyz, Yasair S / Riyadh, Sayed / Sayed, Abdelwahed R

    Current organic synthesis

    2023  

    Abstract: Background: Heterocyclic materials-containing thiazoles exhibited incredible importance in pharmaceutical chemistry and drug design due to their extensive biological properties.: Methods: Synthesis of thiazoles and bis-thiazoles from the reaction of ... ...

    Abstract Background: Heterocyclic materials-containing thiazoles exhibited incredible importance in pharmaceutical chemistry and drug design due to their extensive biological properties.
    Methods: Synthesis of thiazoles and bis-thiazoles from the reaction of 2-((6-Nitrobenzo[ d][1,3]dioxol-5-yl)methylene)hydrazine-1-carbothioamide with hydrazonoyl chlorides in dioxane and in the existence of triethylamine as basic catalyst. The antioxidant, invitro anti-proliferative, and cytotoxicity efficacy of thiazoles and bis-thiazoles were measured.
    Results: In this work, novel series of 5-methyl-2-(2-(-(6-nitrobenzo[d][1,3]dioxol-5-yl)methylene) hydrazinyl)-4-(aryldiazenyl)thiazoles (4a-f) were prepared via the reaction of hydrazonoyl chlorides 2a-f with 2-((6-nitrobenzo[d][1,3]dioxol-5-yl)methylene)hydrazine-1-carbothioamide (1) in dioxane and employing triethylamine as basic catalyst. Following the same procedure, bisthiazoles (6, 8, and 10) have been synthesized by utilizing bis-hydrazonoyl chlorides (5, 7, and 9) and carbothioamide 1 in a molar ratio (1:2), respectively. The distinctive features in the structure of isolated products were elucidated by spectroscopic tools and elemental analyses. The antioxidant, invitro anti-proliferative, cytotoxicity, and anti-cancer efficacy of thiazoles and bis-thiazoles were evaluated. Compounds 4d and 4f were the most potent antioxidant agents. Gene expression of apoptosis markers and fragmentation assay of DNA were assessed to explore the biochemical mechanism of synthesized products. Thiazoles significantly inhibited cell growth and proliferation more than bis-thiazoles. They induced apoptosis through induction of apoptotic gene expression P53 and downregulation of antiapoptotic gene expression Bcl-2. Moreover, they induced fragmentation of DNA in cancer cells, indicating that they could be employed as anticancer agents by inhibiting tumor growth and progression and can be considered effective compounds in the strategy of anti-cancer agents' discovery.
    Conclusion: Synthesis, DPPH Radical Scavenging, Cytotoxic activity, and Apoptosis Induction Efficacy based on Novel Thiazoles and Bis-thiazoles.
    Language English
    Publishing date 2023-11-02
    Publishing country United Arab Emirates
    Document type Journal Article
    ISSN 1570-1794
    ISSN 1570-1794
    DOI 10.2174/0115701794264504231017113027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Efficient Methods for the Synthesis of Novel Arylazothiazoles Based on Acetylferrocene or Adamantane.

    Sayed, Abdelwahed R / Ahmed, Mohamed S M / Gomha, Sobhi M

    Current organic synthesis

    2020  Volume 17, Issue 4, Page(s) 282–287

    Abstract: Background: Hydrazonoyl halides are convenient for the synthesis of arylazothiazoles.: Materials and methods: A series of novel arylazothiazoles were efficiently synthesized from the reaction of hydrazonoyl chlorides with 2-(adamantan-2-ylidene) ... ...

    Abstract Background: Hydrazonoyl halides are convenient for the synthesis of arylazothiazoles.
    Materials and methods: A series of novel arylazothiazoles were efficiently synthesized from the reaction of hydrazonoyl chlorides with 2-(adamantan-2-ylidene)hydrazinecarbothioamide or 2-(ferrocenyl-1-ylidene)hydrazinecarbo-- thioamide in dioxane used as an aprotic solvent because of its lower toxicity and higher boiling point (101 °C) and triethylamine at reflux. The reaction mechanistic pathway proceeded by the nucleophilic substitution reaction by the elimination of hydrogen chloride to give thiohydrazonates as intermediate, which in situ undergo intramolecular cyclization and loss of water molecule to afford the final product of novel arylazothiazoles. This method is simple with good yield and excellent purities.
    Results and discussion: The synthetic schemes for the final products are proposed and discussed. The chemical structures of the final products were identified by different techniques, such as elemental analysis, Fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), and mass spectrometry (MS).
    Conclusion: In this article, we prepared arylazothiazoles from the reaction of 2-(adamantan-2-ylidene)hydrazinecarbothioamide or 2-(ferrocenyl-1-ylidene)hydrazinecarbothioamide with hydrazonoyl halides.
    Language English
    Publishing date 2020-02-26
    Publishing country United Arab Emirates
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1570-1794
    ISSN 1570-1794
    DOI 10.2174/1570179417666200226091711
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Synthesis of New Thiazole Clubbed Imidazo[2,1-b]thiazole Hybrid as Antimycobacterial Agents.

    Mahmoud, Huda K / Sayed, Abdelwahed R / Abdel-Aziz, Marwa M / Gomha, Sobhi M

    Medicinal chemistry (Shariqah (United Arab Emirates))

    2022  Volume 18, Issue 10, Page(s) 1100–1108

    Abstract: Aims: The study aims to synthesize bioactive hybrid pharmacophores (thiazole ring and imidazo[2,1-b]thiazole system) by incorporating them into one biological assessment molecular system.: Background: A literature survey revealed that various imidazo[ ...

    Abstract Aims: The study aims to synthesize bioactive hybrid pharmacophores (thiazole ring and imidazo[2,1-b]thiazole system) by incorporating them into one biological assessment molecular system.
    Background: A literature survey revealed that various imidazo[2,1-b]thiazoles, thiazoles, and hydrazones have powerful antimycobacterial activity.
    Objective: This study demonstrates the effectiveness of molecular hybridization and the scope for imidazo[2,1-b]thiazole-hydrazone-thiazoles to develop as promising antimycobacterial agents.
    Methods: Several imidazo[2,1-b]thiazole-hydrazine-thiazoles 5a-g, 7a,b, 9a,b, 11a,b, 13, and 15a,b were generated using a molecular hybridization strategy and assessed against Mycobacterium tuberculosis (ATCC 25618) for their in vitro antituberculous activity.
    Results: Derivative 7b (MIC = 0.98 μg/mL) has shown the most promising antimycobacterial activity among the series tested. Brief structure-activity relationship studies found that the thiazole of chlorophenyl or pyridine, or coumarin had a significant relation with the antimycobacterial activity.
    Conclusion: The promising antimycobacterial activity of compound 7b compared with the reference drug suggests that this compound may contribute as a lead compound in the search for new potential antimycobacterial agents.
    MeSH term(s) Anti-Bacterial Agents ; Hydrazones ; Mycobacterium tuberculosis ; Structure-Activity Relationship ; Thiazoles
    Chemical Substances Anti-Bacterial Agents ; Hydrazones ; Thiazoles
    Language English
    Publishing date 2022-04-11
    Publishing country Netherlands
    Document type Journal Article
    ISSN 1875-6638
    ISSN (online) 1875-6638
    DOI 10.2174/1573406418666220413095854
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Design, Synthesis, and Biological Evaluations of Novel Azothiazoles Based on Thioamide.

    Sayed, Abdelwahed R / Elsawy, Hany / Shaaban, Saad / Gomha, Sobhi M / Al-Faiyz, Yasair S

    Current issues in molecular biology

    2022  Volume 44, Issue 7, Page(s) 2956–2966

    Abstract: Herein we studied the preparation of different thiazoles via the reaction of 2-(3,4-dimethoxybenzylidene)hydrazine-1-carbothioamide ( ...

    Abstract Herein we studied the preparation of different thiazoles via the reaction of 2-(3,4-dimethoxybenzylidene)hydrazine-1-carbothioamide (
    Language English
    Publishing date 2022-07-01
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2000024-8
    ISSN 1467-3045 ; 1467-3037
    ISSN (online) 1467-3045
    ISSN 1467-3037
    DOI 10.3390/cimb44070204
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Green Biocatalyst for Ultrasound-Assisted Thiazole Derivatives: Synthesis, Antibacterial Evaluation, and Docking Analysis.

    Hussein, Ahmed M / Gomha, Sobhi M / El-Ghany, Nahed A Abd / Zaki, Magdi E A / Farag, Basant / Al-Hussain, Sami A / Sayed, Abdelwahed R / Zaki, Yasser H / Mohamed, Nadia A

    ACS omega

    2024  Volume 9, Issue 12, Page(s) 13666–13679

    Abstract: The catalytic activity of chitosan (Cs) and grafted Cs led to the preparation of terephthalohydrazide Cs Schiff's base hydrogel (TCsSB), which was then investigated as an eco-friendly biocatalyst for synthesizing novel thiazole derivatives. TCsSB ... ...

    Abstract The catalytic activity of chitosan (Cs) and grafted Cs led to the preparation of terephthalohydrazide Cs Schiff's base hydrogel (TCsSB), which was then investigated as an eco-friendly biocatalyst for synthesizing novel thiazole derivatives. TCsSB exhibited greater surface area and higher thermal stability compared to Cs, making it a promising eco-friendly biocatalyst. We synthesized two novel series of thiazoles via the reaction of 2-(2-oxo-1,2-diphenylethylidene) hydrazine-1-carbothioamide with various hydrazonoyl chlorides and 2-bromo-1-arylethan-1-ones, employing ultrasonic irradiation and using TCsSB as a catalyst. A comparative study between Cs and TCsSB revealed higher yields than TCsSB. The methodology offered advantages such as mild reaction conditions, quick reaction times, and high yields. TCsSB could be reused multiple times without a significant loss of potency. The chemical structures of the newly synthesized compounds were verified through IR,
    Language English
    Publishing date 2024-03-12
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c07785
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Synthesis of novel bis-thiadiazoles, bis-triazoles and polypyrazole derivatives based on hydrazonoyl halides

    Sayed, Abdelwahed R

    Tetrahedron. 2013 July 1, v. 69, no. 26

    2013  

    Abstract: A series of novel bis-thiadiazoles and bis-triazoles derivatives were synthesized via the reaction of hydrazonoyl halides with different moieties. Also, the synthesis and mechanism for polypyrazole formation are described via reaction of bis-hydrazonoyl ... ...

    Abstract A series of novel bis-thiadiazoles and bis-triazoles derivatives were synthesized via the reaction of hydrazonoyl halides with different moieties. Also, the synthesis and mechanism for polypyrazole formation are described via reaction of bis-hydrazonoyl with p-benzoquinone. Synthesized compounds were elucidated by elemental analysis and spectral data.
    Keywords benzoquinones ; chemical reactions ; chemical structure ; halides ; spectral analysis
    Language English
    Dates of publication 2013-0701
    Size p. 5293-5298.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204285-x
    ISSN 1464-5416 ; 0040-4020 ; 0563-2064
    ISSN (online) 1464-5416
    ISSN 0040-4020 ; 0563-2064
    DOI 10.1016/j.tet.2013.04.137
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Synthesis of 1,3,4-thiadiazines, bis-1,3,4-thiadiazoles, [1,2,4]triazino[3,4-b][1,3,4]thiadiazine, thiazolines from carbonothioic dihydrazide

    Sayed, Abdelwahed R

    Tetrahedron. 2012 Apr. 1, v. 68, no. 13

    2012  

    Abstract: A novel and efficient synthesis of 1,3,4-thiadiazines, bis-1,3,4-thiadiazoles, [1,2,4]triazino[3,4-b][1,3,4]thiadiazine, and thiazolines is reported from the reaction of α-haloketo hydrazonoyl halides with carbonothioic dihydrazide or its analogues. The ... ...

    Abstract A novel and efficient synthesis of 1,3,4-thiadiazines, bis-1,3,4-thiadiazoles, [1,2,4]triazino[3,4-b][1,3,4]thiadiazine, and thiazolines is reported from the reaction of α-haloketo hydrazonoyl halides with carbonothioic dihydrazide or its analogues. The structures were elucidated on the basis of their elemental analysis, spectral data and an alternative synthetic route.
    Keywords chemical reactions ; chemical structure ; halides ; organic compounds ; spectral analysis
    Language English
    Dates of publication 2012-0401
    Size p. 2784-2789.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 204285-x
    ISSN 1464-5416 ; 0040-4020 ; 0563-2064
    ISSN (online) 1464-5416
    ISSN 0040-4020 ; 0563-2064
    DOI 10.1016/j.tet.2012.02.011
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: New Route Synthesis of Thiadiazoles, Bisthiadiazoles, Thiadiazolotriazines, and Pyrazolothiadiazoles Based on Hydrazonoyl Halides and Dihydrazinylthiadiazole.

    Sayed, Abdelwahed R / Al-Shihry, Shar Saad

    Molecules (Basel, Switzerland)

    2017  Volume 22, Issue 2

    Abstract: Synthesis and characterization of new thiadiazoles, bisthiadiazoles from the reaction of mono- and di-hydrazonoyl halides with various hydrazinecarbodithioate derivatives were studied. Treatment of hydrazonoyl halides with 2,5-dihydrazinyl-1,3,4- ... ...

    Abstract Synthesis and characterization of new thiadiazoles, bisthiadiazoles from the reaction of mono- and di-hydrazonoyl halides with various hydrazinecarbodithioate derivatives were studied. Treatment of hydrazonoyl halides with 2,5-dihydrazinyl-1,3,4-thiadiazole afforded new bistriazines containing thiadiazole; we also examined the reaction of 2,5-dihydrazinyl-1,3,4-thiadiazole with active methylene compounds to afford new pyrazoles containing thiadiazole compounds. The new synthesized compounds were identified by elemental analysis and various spectral data (Fourier transform infrared spectroscopy, mass spectrometry, 1H and 13C nuclear magnetic resonance).
    MeSH term(s) Carbon-13 Magnetic Resonance Spectroscopy ; Chemistry Techniques, Synthetic ; Proton Magnetic Resonance Spectroscopy ; Spectroscopy, Fourier Transform Infrared ; Thiadiazoles/chemical synthesis ; Thiadiazoles/chemistry
    Chemical Substances Thiadiazoles
    Language English
    Publishing date 2017-02-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules22020336
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Synthesis and Biological Evaluation of Bisthiazoles and Polythiazoles.

    Al-Omair, Mohammed A / Sayed, Abdelwahed R / Youssef, Magdy M

    Molecules (Basel, Switzerland)

    2018  Volume 23, Issue 5

    Abstract: Small heterocyclic compounds containing nitrogen and sulfur atoms, such as thiazole derivatives, represent a significant class of organic azoles that exhibit promising bioactivities and have a great potential in medicinal and agricultural fields. A ... ...

    Abstract Small heterocyclic compounds containing nitrogen and sulfur atoms, such as thiazole derivatives, represent a significant class of organic azoles that exhibit promising bioactivities and have a great potential in medicinal and agricultural fields. A convenient and high-yielding synthetic approach for a range of organic molecules is presented. The nuclease-like activities of compounds were studied with the aid of
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Antioxidants/pharmacology ; Bacteria/drug effects ; Cell Death/drug effects ; Cell Line, Tumor ; DNA/metabolism ; Humans ; Lipid Peroxidation/drug effects ; Microbial Sensitivity Tests ; Nitric Oxide/metabolism ; Thiazoles/chemical synthesis ; Thiazoles/chemistry ; Thiazoles/pharmacology
    Chemical Substances Anti-Bacterial Agents ; Antioxidants ; Thiazoles ; Nitric Oxide (31C4KY9ESH) ; DNA (9007-49-2)
    Language English
    Publishing date 2018-05-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules23051133
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: One-Pot Synthesis of Novel Thiazoles as Potential Anti-Cancer Agents.

    Sayed, Abdelwahed R / Gomha, Sobhi M / Taher, Eman A / Muhammad, Zeinab A / El-Seedi, Hesham R / Gaber, Hatem M / Ahmed, Mahgoub M

    Drug design, development and therapy

    2020  Volume 14, Page(s) 1363–1375

    Abstract: Background: Thiazole and thiosemicarbazone derivatives are known to have potential anticancer activity with a mechanism of action related to inhibition of matrix metallo-proteinases, kinases and anti-apoptotic BCL2 family proteins.: Materials and ... ...

    Abstract Background: Thiazole and thiosemicarbazone derivatives are known to have potential anticancer activity with a mechanism of action related to inhibition of matrix metallo-proteinases, kinases and anti-apoptotic BCL2 family proteins.
    Materials and methods: A novel three series of 5-(1-(2-(thiazol-2-yl)hydrazono)ethyl)thiazole derivatives were prepared in a one-pot three-component reaction using 2-(2-benzylidene hydrazinyl)-4-methylthiazole as a starting precursor. MS, IR,
    Results: The results indicated that compounds 
    Conclusion: Thiazole scaffolds
    MeSH term(s) Antineoplastic Agents/chemical synthesis ; Antineoplastic Agents/chemistry ; Antineoplastic Agents/pharmacology ; Apoptosis/drug effects ; Cell Proliferation/drug effects ; Dose-Response Relationship, Drug ; Drug Screening Assays, Antitumor ; HCT116 Cells ; HT29 Cells ; Hep G2 Cells ; Humans ; Molecular Structure ; Structure-Activity Relationship ; Thiazoles/chemical synthesis ; Thiazoles/chemistry ; Thiazoles/pharmacology
    Chemical Substances Antineoplastic Agents ; Thiazoles
    Language English
    Publishing date 2020-04-03
    Publishing country New Zealand
    Document type Journal Article
    ZDB-ID 2451346-5
    ISSN 1177-8881 ; 1177-8881
    ISSN (online) 1177-8881
    ISSN 1177-8881
    DOI 10.2147/DDDT.S221263
    Database MEDical Literature Analysis and Retrieval System OnLINE

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