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Zardi P, Piękoś J, Bravin C, Wurst K, Droghetti F, Natali M, Licini G, Zambon A, Zonta C. Novel ligands from direct benzylic functionalisation of tris(2-pyridylmethyl)amine. Dalton Trans 2024; 53:13831-13836. [PMID: 39113567 DOI: 10.1039/d4dt02022g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2024]
Abstract
Tris-(2-pyridylmethyl)amines (TPA or TPMA) are polipyrydine-based ligands extensively used in catalysis and supramolecular chemistry due their capability to form stable tetradentate complexes with a large variety of metals. The unsubstituted ligand, which is also commercially available, can be synthesised by consecutive alkylation of a picoline or by reductive amination of a pyridine aldehyde. In this article, we report a novel synthetic method which opens to the post-functionalisation of these ligands in the benzylic position. This novel derivatization strategy, beside providing synthetic access to novel structures and functions, has been used to prepare a series of metal complexes which have been tested in photochemical hydrogen evolution.
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Affiliation(s)
- Paolo Zardi
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, via Campi 103, 41125, Modena, Italy.
| | - Justyna Piękoś
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
| | - Carlo Bravin
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
| | - Klaus Wurst
- Department of General, Inorganic and Theoretical Chemistry University of Innsbruck, A-6020 Innsbruck, Austria
| | - Federico Droghetti
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Università di Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Mirco Natali
- Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie, Università di Ferrara, via L. Borsari 46, 44121 Ferrara, Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
| | - Alfonso Zambon
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, via Campi 103, 41125, Modena, Italy.
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche, Università di Padova, via Marzolo 1, 35131 Padova, Italy.
- CIRCC Interuniversity Consortium Chemical Reactivity and Catalysis, Via Celso Ulpiani 27, 70126 Bari, Italy
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Izmest'ev ES, Pestova SV, Kolesnikova AI, Baidamshina DR, Kayumov AR, Rubtsova SA. Terpene-Functionalized Fluoroquinolones as Potential Antimicrobials: Synthesis and Properties. ChemMedChem 2023; 18:e202300358. [PMID: 37872856 DOI: 10.1002/cmdc.202300358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 10/22/2023] [Accepted: 10/23/2023] [Indexed: 10/25/2023]
Abstract
This study was the first to synthesize terpene-containing conjugates of fluoroquinolones, ciprofloxacin and norfloxacin, and to evaluate their antibacterial activity against gram-positive methicillin sensitive (MSSA) and methicillin resistant (MRSA) S. aureus, gram-negative P. aeruginosa as well as antifungal activity against C. albicans. The ability of obtained fluoroquinolones to inhibit S. aureus growth was found to depend upon the presence of a linker separating the bulky terpene and fluoroquinolone fragments, and this activity diminished with increasing its length. The highest activity against MSSA was demonstrated by ciprofloxacin derivatives with campholenic (MIC 1 μg/mL) and 2-(isobornan-2-yl-sulfanyl)acetyl (MIC 0.5 μg/mL) substituents. The compound with the last fragment showed high activity against MRSA (MIC 8 μg/mL). The terpene-functionalized norfloxacin derivatives generally proved to be less active than those containing ciprofloxacin fragment. Camphor-10-sulfonylamide derivative with the ciprofloxacin fragment was the only one of all compounds that showed high antifungal activity against C. albicans (8 μg/mL). The study presents data on docking fluoroquinolones to S. aureus DNA gyrase to explain the reasons for manifestation or disappearance of antibacterial activity. The cytotoxicity of fluoroquinolones that showed any antimicrobial activity was investigated against bovine primary lung cells, and they were found to be not toxic in most cases.
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Affiliation(s)
- Evgeniy S Izmest'ev
- Institute of Chemistry, FRC Komi Science Center Ural Branch of the Russian Academy of Sciences, 48, Pervomaiskaya St., 167000, Syktyvkar, Russian Federation
| | - Svetlana V Pestova
- Institute of Chemistry, FRC Komi Science Center Ural Branch of the Russian Academy of Sciences, 48, Pervomaiskaya St., 167000, Syktyvkar, Russian Federation
| | - Alena I Kolesnikova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18, Kremlevskaya St., 420008, Kazan, Russian Federation
| | - Diana R Baidamshina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18, Kremlevskaya St., 420008, Kazan, Russian Federation
| | - Airat R Kayumov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18, Kremlevskaya St., 420008, Kazan, Russian Federation
| | - Svetlana A Rubtsova
- Institute of Chemistry, FRC Komi Science Center Ural Branch of the Russian Academy of Sciences, 48, Pervomaiskaya St., 167000, Syktyvkar, Russian Federation
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Šegina J, Ciber L, Brodnik H, Požgan F, Svete J, Štefane B, Grošelj U. Synthesis of Six-Membered N-Heterocyclic Carbene Precursors Based on Camphor. Molecules 2023; 28:7973. [PMID: 38138463 PMCID: PMC10745536 DOI: 10.3390/molecules28247973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023] Open
Abstract
The endo- and exo-N-heterocyclic carbene precursors based on camphor were prepared diastereoselectively in five synthetic steps starting from (1S)-(+)-ketopinic acid. The obtained N-heterocyclic carbene precursors were investigated in an asymmetric benzoin reaction. All new compounds were fully characterized, and the absolute configurations were determined via X-ray diffraction and NOESY measurements.
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Affiliation(s)
| | | | | | | | | | | | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot 113, 1000 Ljubljana, Slovenia; (J.Š.); (L.C.); (F.P.); (J.S.); (B.Š.)
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Alcock E, Mackey P, Turlik A, Bhatt K, Light ME, Houk KN, McGlacken GP. The Aldol-Tishchenko Reaction of Butanone, Cyclobutanone and a 3-Pentanone Derived Sulfinylimine and DFT Calculations of the Stereo-determining Step. Chemistry 2023; 29:e202203029. [PMID: 36617506 DOI: 10.1002/chem.202203029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/12/2022] [Accepted: 12/20/2022] [Indexed: 01/10/2023]
Abstract
Herein, we present a highly diastereoselective method to furnish acyclic 3-amino-1,5-diol derivatives using a tandem double-aldol-Tishchenko protocol (dr up to >99 : 1) using a butanone derived sulfinylimine. In most cases only 1 diastereomer predominates, from a possible 16. The reaction is also regioselective. In addition, the highly challenging cyclobutanone and 3-pentanone derivatives are also amenable to a double-aldol-Tishchenko reaction, although the dr values are modest. Despite that, clean single diastereomers can be isolated, which should prove very useful in medicinal chemistry and other areas. Detailed DFT calculations support the observed stereoselectivities in all cases, providing a rationale for the excellent dr values in the butanone series and the moderate values for the 3-pentanone class.
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Affiliation(s)
- Emma Alcock
- School of Chemistry and Analytical and Biological Research Facility, University College Cork, T12 YN60, Cork, Ireland
| | - Pamela Mackey
- School of Chemistry and Analytical and Biological Research Facility, University College Cork, T12 YN60, Cork, Ireland
| | - Aneta Turlik
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California, 90095-1596, USA
| | - Khushi Bhatt
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California, 90095-1596, USA
| | - Mark E Light
- University of Southampton, Chemistry Department University Road, Southampton, SO17 1BJ, UK
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California, 90095-1596, USA
| | - Gerard P McGlacken
- School of Chemistry and Analytical and Biological Research Facility, University College Cork, T12 YN60, Cork, Ireland
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Pestova SV, Petukhov DV, Izmest’ev ES, Rubtsova SA. Synthesis of Dehydroabietane-derived Sulfonamides with a Lysine Fragment. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022080139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Adamantane-Monoterpenoid Conjugates Linked via Heterocyclic Linkers Enhance the Cytotoxic Effect of Topotecan. Molecules 2022; 27:molecules27113374. [PMID: 35684313 PMCID: PMC9182348 DOI: 10.3390/molecules27113374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/15/2022] [Accepted: 05/22/2022] [Indexed: 01/01/2023] Open
Abstract
Inhibiting tyrosyl-DNA phosphodiesterase 1 (TDP1) is a promising strategy for increasing the effectiveness of existing antitumor therapy since it can remove the DNA lesions caused by anticancer drugs, which form covalent complexes with topoisomerase 1 (TOP1). Here, new adamantane-monoterpene conjugates with a 1,2,4-triazole or 1,3,4-thiadiazole linker core were synthesized, where (+)-and (-)-campholenic and (+)-camphor derivatives were used as monoterpene fragments. The campholenic derivatives 14a-14b and 15a-b showed activity against TDP1 at a low micromolar range with IC50 ~5-6 μM, whereas camphor-containing compounds 16 and 17 were ineffective. Surprisingly, all the compounds synthesized demonstrated a clear synergy with topotecan, a TOP1 poison, regardless of their ability to inhibit TDP1. These findings imply that different pathways of enhancing topotecan toxicity other than the inhibition of TDP1 can be realized.
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Bulmer R, Spencer TB, Wilden A, Modolo G, Vu TH, Simonin JP, Lewis FW. New Route to Amide-Functionalized N-Donor Ligands Enables Improved Selective Solvent Extraction of Trivalent Actinides. Chem Commun (Camb) 2022; 58:10667-10670. [DOI: 10.1039/d2cc03876e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new general synthetic route to selective actinide extracting ligands for spent nuclear fuel reprocessing has been established. The amide-functionalized ligands separate Am(III) and Cm(III) from the lanthanides with high...
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