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Heteroleptic Copper Complexes as Catalysts for the CuAAC Reaction: Counter-Ion Influence in Catalyst Efficiency. Catalysts 2023. [DOI: 10.3390/catal13020386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
A series of nine cationic heteroleptic aryl-BIAN-copper(I) (BIAN = bis-iminoacenaphthene) complexes with the general formula [Cu((E-C6H4)2BIAN)(PPh3)2][X] (E = p-Me, p-iPr, o-iPr; X = BF4, OTf, NO3) 1X–3X were synthesized and fully characterized using several analytical techniques, including NMR spectroscopy and single-crystal X-ray diffraction. Except for complexes 2BF4 and 3BF4, which were already reported in our previous works, all remaining complexes are herein described for the first time. Two different strategies were used for the preparation of the complexes: complexes bearing BF4− or OTf− counter-ions (1BF4, 1OTf, 2OTf, and 3OTf) were obtained using the appropriate copper(I) precursors [Cu(NCMe)4][BF4] or [Cu(NCMe)4][OTf], whereas for derivatives 1NO3–3NO3, [Cu(PPh3)2NO3] was used. Their activity as catalysts for the copper azide-alkyne cycloaddition (CuAAC) was assessed alongside other high activity, previously reported Cu(I) complexes. Comparative studies to determine the influence of the counter-ion and of the aryl substituents were performed. All complexes behaved as active catalysts under neat reaction conditions, at 25 °C and in short reaction times without requiring the use of any additive, with complex 2NO3 being the most efficient derivative, along with other NO3−-bearing complexes.
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Brufani G, Valentini F, Rossini G, Rosignoli L, Gu Y, Liu P, Vaccaro L. Waste-minimized continuous flow copper-catalyzed azide-alkyne cycloaddition with low metal contamination. GREEN SYNTHESIS AND CATALYSIS 2023. [DOI: 10.1016/j.gresc.2023.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Tolan HEM, Radwan MAA, Soliman HA, Awad HM, El-Sayed WA. Synthesis and Anti-Proliferative Activity of New Acridinyl and Benzothiazolyl-Based Triazole Glycosides via Click Cycloaddition and Their Tetrazolyl Analogs. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162020060345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Nielsen BE, Stabile S, Vitale C, Bouzat C. Design, Synthesis, and Functional Evaluation of a Novel Series of Phosphonate-Functionalized 1,2,3-Triazoles as Positive Allosteric Modulators of α7 Nicotinic Acetylcholine Receptors. ACS Chem Neurosci 2020; 11:2688-2704. [PMID: 32786318 DOI: 10.1021/acschemneuro.0c00348] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The α7 nicotinic acetylcholine receptor is a pentameric ligand-gated ion channel widely distributed in the central nervous system, mainly in the hippocampus and cortex. The enhancement of its activity by positive allosteric modulators (PAMs) is a promising therapeutic strategy for cognitive deficits and neurodegenerative disorders. With the aim of developing novel scaffolds with PAM activity, we designed and synthesized a series of phosphonate-functionalized 1,4-disubstituted 1,2,3-triazoles using supported copper nanoparticles as the cycloaddition reaction catalyst and evaluated their activity on α7 receptors by single-channel and whole-cell recordings. We identified several triazole derivatives that displayed PAM activity, with the compound functionalized with the methyl phosphonate group being the most efficacious one. At the macroscopic level, α7 potentiation was evidenced as an increase of the maximal currents elicited by acetylcholine with minimal effects on desensitization, recapitulating the actions of type I PAMs. At the single-channel level, the active compounds did not affect channel amplitude but significantly increased the duration of channel openings and activation episodes. By using chimeric and mutant α7 receptors, we demonstrated that the new α7 PAMs share transmembrane structural determinants of potentiation with other chemically nonrelated PAMs. To gain further insight into the chemical basis of potentiation, we applied structure-activity relationship strategies involving modification of the chain length, inversion of substituent positions in the triazole ring, and changes in the aromatic nucleus. Our findings revealed that the phosphonate-functionalized 1,4-disubstituted 1,2,3-triazole is a novel pharmacophore for the development of therapeutic agents for neurological and neurodegenerative disorders associated with cholinergic dysfunction.
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Affiliation(s)
- Beatriz Elizabeth Nielsen
- Departamento de Biologı́a, Bioquı́mica y Farmacia, Instituto de Investigaciones Bioquı́micas de Bahı́a Blanca (INIBIBB), Departamento de Biologı́a, Bioquı́mica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Cientı́ficas y Técnicas (CONICET), Bahía Blanca 8000, Buenos Aires, Argentina
| | - Santiago Stabile
- Instituto de Quı́mica del Sur (INQUISUR), Departamento de Quı́mica, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Buenos Aires, Argentina
| | - Cristian Vitale
- Instituto de Quı́mica del Sur (INQUISUR), Departamento de Quı́mica, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bahía Blanca 8000, Buenos Aires, Argentina
| | - Cecilia Bouzat
- Departamento de Biologı́a, Bioquı́mica y Farmacia, Instituto de Investigaciones Bioquı́micas de Bahı́a Blanca (INIBIBB), Departamento de Biologı́a, Bioquı́mica y Farmacia, Universidad Nacional del Sur-Consejo Nacional de Investigaciones Cientı́ficas y Técnicas (CONICET), Bahía Blanca 8000, Buenos Aires, Argentina
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A decade of advances in the reaction of nitrogen sources and alkynes for the synthesis of triazoles. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213217] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Alminderej FM, Elganzory HH, El-Bayaa MN, Awad HM, El-Sayed WA. Synthesis and Cytotoxic Activity of New 1,3,4-Thiadiazole Thioglycosides and 1,2,3-Triazolyl-1,3,4-Thiadiazole N-glycosides. Molecules 2019; 24:molecules24203738. [PMID: 31623291 PMCID: PMC6832760 DOI: 10.3390/molecules24203738] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 11/21/2022] Open
Abstract
New 1,3,4-thiadiazole thioglycosides linked to substituted arylidine systems were synthesized via glycosylation of the prepared 1,3,4-thiadiazole thiol compounds. Click strategy was also used for the synthesis of new 1,3,4-thiadiazole and 1,2,3-triazole hybrid glycosides by reaction of the acetylenic derivatives with different glycosyl azids followed by deacetylation process. The cytotoxic activities of the prepared compounds were studied against HCT-116 (human colorectal carcinoma) and MCF-7 (human breast adenocarcinoma) cell lines using the MTT assay. The results showed that the key thiadiazolethione compounds 2 and 3, the triazole glycosides linked to p-methoxyarylidine derivatives 14 and 15 in addition to the free hydroxyl glycoside 20 were found potent in activity comparable to the reference drug doxorubicin against MCF-7 human cancer cells. The acetylenic derivative 2 and glycoside 20 were also found highly active against HCT-116 cell lines.
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Affiliation(s)
- Fahad M Alminderej
- Chemistry Department, Faculty of Science, Qassim University, Buraidah 51452, Saudi Arabia.
| | - Hussein H Elganzory
- Chemistry Department, Faculty of Science, Qassim University, Buraidah 51452, Saudi Arabia.
| | - Mohamed N El-Bayaa
- Photochemistry Department, National Research Centre, Cairo 12311, Egypt.
| | - Hanem M Awad
- Tanning Materials and Leather Technology Department, National Research Centre, El-Behouth St, Dokki, Cairo 12311, Egypt.
| | - Wael A El-Sayed
- Chemistry Department, Faculty of Science, Qassim University, Buraidah 51452, Saudi Arabia.
- Photochemistry Department, National Research Centre, Cairo 12311, Egypt.
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Kassem AF, Abbas EMH, El-Kady DS, Awad HM, El-Sayed WA. Design, Synthesis and Anticancer Activity of New Thiazole-Tetrazole or Triazole Hybrid Glycosides Targeting CDK-2 via Structure-Based Virtual Screening. Mini Rev Med Chem 2019; 19:933-948. [DOI: 10.2174/1389557519666181231121217] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 12/18/2018] [Accepted: 12/23/2018] [Indexed: 11/22/2022]
Abstract
Background & Objective:
The target tetrazole glycosides were synthesized by construction
of ring system by cycloaddition reaction of benzothiazole-linked nitrile derivative and sodium azide
followed by N-glycosylation process and deprotection.
Methods:
The triazole glycosides were prepared by applying click approach involving dipolar cycloaddition
of benzothiazole possessing alkyne functionality and different glycosyl azides. The products
incorporating acyclic analogs of sugar moieties were synthesized through alkylation using acyclic
oxygenated halides.
Results:
The anticancer activity was studied against human breast adenocarcinoma cells (MCF-7) and
human normal Retina pigmented epithelium cells (RPE-1). High activities were revealed by three
compounds with IC50 values 11.9-16.5 µM compared to doxorubicin (18.6 µM) in addition to other
four derivatives with good inhibition activities.
Conclusion:
Enzyme docking investigation was performed into cyclin-dependent kinase 2 (CDK2); a potential
target for cancer medication. Compounds which have possessed highest activities revealed good
fitting inside the binding site of the protein molecular surface and showed minimum binding energy.
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Affiliation(s)
- Asmaa F. Kassem
- Chemistry of Natural and Microbial products Department, National Research Centre, El-Behouth St, Dokki, Cairo, Egypt
| | - Eman M. H. Abbas
- Chemistry of Natural and Microbial products Department, National Research Centre, El-Behouth St, Dokki, Cairo, Egypt
| | - Dina S. El-Kady
- Hormone Department, National Research Centre, El-Behouth St, Dokki, Cairo, Egypt
| | - Hanem M. Awad
- Tanning Materials and Leather Technology Department, National Research Centre, El-Behouth St, Dokki, Cairo, Egypt
| | - Wael A. El-Sayed
- Chemistry Department, Faculty of Science, Qassim University, Al-Qassim, Saudi Arabia
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Sultana J, Khupse ND, Chakrabarti S, Chattopadhyay P, Sarma D. Ag2CO3-catalyzed cycloaddition of organic azides onto terminal alkynes: A green and sustainable protocol accelerated by aqueous micelles of CPyCl. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Saehlim N, Kasemsuk T, Sirion U, Saeeng R. One-Pot Approach for the Synthesis of Bis-indole-1,4-disubstituted-1,2,3-triazoles. J Org Chem 2018; 83:13233-13242. [PMID: 30298733 DOI: 10.1021/acs.joc.8b02056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A new strategy for the synthesis of bis-indoletriazoles was developed using a sequential one-pot four-step procedure via I2 and H2SO4-SiO2 catalyzed Friedel-Crafts reactions of indole with aldehyde followed by N-alkylation with propargyl bromide, azidation, and copper(I)-catalyzed azide alkyne cycloaddition (CuAAC). The reaction proceeded smoothly at room temperature in a short time, and a series of bis-indoletriazoles were obtained in good to excellent yields proving the generality of this one-pot methodology.
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Affiliation(s)
- Natthiya Saehlim
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Burapha University , Sangesook , Chonburi 20131 , Thailand
| | - Teerapich Kasemsuk
- Department of Chemistry, Faculty of Science and Technology , RambhaiBarni Rajabhat University , Chanthaburi , 22000 , Thailand
| | - Uthaiwan Sirion
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Burapha University , Sangesook , Chonburi 20131 , Thailand
| | - Rungnapha Saeeng
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science , Burapha University , Sangesook , Chonburi 20131 , Thailand
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