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Rajak S, Chair K, Rana LK, Kaur P, Maris T, Duong A. Amidine/Amidinate Cobalt Complexes: One-Pot Synthesis, Mechanism, and Photocatalytic Application for Hydrogen Production. Inorg Chem 2020; 59:14910-14919. [DOI: 10.1021/acs.inorgchem.0c01495] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sanil Rajak
- Département de Chimie, Biochimie et Physique and Institut de Recherche sur l’Hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec G9A 5H7, Canada
| | - Khaoula Chair
- Département de Chimie, Biochimie et Physique and Institut de Recherche sur l’Hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec G9A 5H7, Canada
| | - Love Karan Rana
- Département de Chimie, Biochimie et Physique and Institut de Recherche sur l’Hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec G9A 5H7, Canada
| | - Prabhjyot Kaur
- Département de Chimie, Biochimie et Physique and Institut de Recherche sur l’Hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec G9A 5H7, Canada
| | - Thierry Maris
- Département de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Adam Duong
- Département de Chimie, Biochimie et Physique and Institut de Recherche sur l’Hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec G9A 5H7, Canada
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Maciejewska D, Żabiński J, Rezler M, Kaźmierczak P, Collins MS, Ficker L, Cushion MT. Development of highly active anti- Pneumocystis bisbenzamidines: insight into the influence of selected substituents on the in vitro activity. MEDCHEMCOMM 2017; 8:2003-2011. [PMID: 30108719 PMCID: PMC6071923 DOI: 10.1039/c7md00445a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 10/02/2017] [Indexed: 11/21/2022]
Abstract
Here we describe the potency of 21 pentamidine analogues against the fungal pathogen, Pneumocystis carinii, in an ATP bioluminescent assay with toxicity profiles in 2 mammalian cell lines. Reduction of two 5-methyl-1,2,4-oxadiazole rings was applied to the synthesis of acid-labile bisamidines. Anti-Pneumocystis activity is discussed in the context of 3 groups of compounds depending on the main structural changes of the pentamidine lead structure. The groups include: 1) 1,4-bis(methylene)piperazine derivatives 1-5; 2) alkanediamide derivatives 6-10; 3) alkane-derived bisbenzamidines 11-21. IC50 values of 18 compounds were lower than the IC50 of pentamidine. Four bisamidines were active at nanogram concentrations. Introduction of sulfur atoms in the alkane bridge, replacement of the amidino groups with imidazoline rings, or attachment of nitro or amino groups to the benzene rings is responsible for remarkable activity of the new leading structures. The vast majority of compounds, including four highly active ones, can be classified as mild or nontoxic to host cells. These compounds show promise as candidates for new anti-Pneumocystis agents.
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Affiliation(s)
- D Maciejewska
- Department of Organic Chemistry , Faculty of Pharmacy , Medical University of Warsaw , Banacha 1 Street , 02-097 Warsaw , Poland .
| | - J Żabiński
- Department of Organic Chemistry , Faculty of Pharmacy , Medical University of Warsaw , Banacha 1 Street , 02-097 Warsaw , Poland .
| | - M Rezler
- Department of Organic Chemistry , Faculty of Pharmacy , Medical University of Warsaw , Banacha 1 Street , 02-097 Warsaw , Poland .
| | - P Kaźmierczak
- Department of Organic Chemistry , Faculty of Pharmacy , Medical University of Warsaw , Banacha 1 Street , 02-097 Warsaw , Poland .
| | - M S Collins
- Division of Infectious Diseases , Department of Internal Medicine , University of Cincinnati College of Medicine , 231 Albert Sabin Way , Cincinnati , OH 45267 , USA .
- Cincinnati Veterans Affairs Medical Center , 3200 Vine Street , Cincinnati , OH 45220 , USA
| | - L Ficker
- Division of Infectious Diseases , Department of Internal Medicine , University of Cincinnati College of Medicine , 231 Albert Sabin Way , Cincinnati , OH 45267 , USA .
- Cincinnati Veterans Affairs Medical Center , 3200 Vine Street , Cincinnati , OH 45220 , USA
| | - M T Cushion
- Division of Infectious Diseases , Department of Internal Medicine , University of Cincinnati College of Medicine , 231 Albert Sabin Way , Cincinnati , OH 45267 , USA .
- Cincinnati Veterans Affairs Medical Center , 3200 Vine Street , Cincinnati , OH 45220 , USA
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Oliveira PF, Haruta N, Chamayou A, Guidetti B, Baltas M, Tanaka K, Sato T, Baron M. Comprehensive experimental investigation of mechanically induced 1,4-diazines synthesis in solid state. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Singh AS, Tiwari RK, Lee MM, Behera JN, Sun SS, Chandrasekhar V. Structural Tuning of Anion-Templated Motifs with External Stimuli through Crystal-to-Crystal Transformation. Chemistry 2017; 23:762-766. [PMID: 27879018 DOI: 10.1002/chem.201604542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 11/10/2022]
Abstract
Protonation of trans-1,2-bis(4-pyridyl)ethylene (4,4'-bpe) with dilute sulfuric acid (33 %) afforded a protonated adduct [{4,4'-bpe⋅2 H+ }2 {HSO4 }-2 {SO4 }-2 {H2 O}2 ] (1). The neighboring olefinic bond in 1 is in a suitable range (3.931-4.064 Å) to undergo a photochemical [2+2] cycloaddition reaction. Upon irradiation with UV light (365 nm), 1 undergoes a molecular sliding involving the 4,4'-bpe⋅2 H+ units, affording 2, stabilized through OSO4 ⋅⋅⋅π interactions. Heating 1 to 50° C leads to a 3D hydrogen-bonded organic framework (HOF) (3). This process occurs through thermal dissociation of the bisulfate anion. Diffusion of iodine through the crystal lattice of 1 and 3 enables the reduction of sulfate to bisulfate, affording a 1D hydrogen-bonded chain (4). Solid-state 13 C CPMAS NMR, IR, DSC, and powder XRD studies further support stimuli-responsive structural tuning through crystal-to-crystal transformation. All these conversions occur with significant translational and rotational movements along with a series of bond-breaking and bond-forming processes.
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Affiliation(s)
- Ashutosh S Singh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Ranjay K Tiwari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Mandy M Lee
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - Jogendra N Behera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, Nangang, 115, Taipei, Taiwan, ROC
| | - V Chandrasekhar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, PO Jatni, Khurda, 752050, Odissa, India
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