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Mehany MM, Hammam OA, Selim AA, Sayed GH, Anwer KE. Novel pyridine bearing pentose moiety-based anticancer agents: design, synthesis, radioiodination and bioassessments. Sci Rep 2024; 14:2738. [PMID: 38302640 PMCID: PMC10834463 DOI: 10.1038/s41598-024-53228-4] [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: 05/15/2023] [Accepted: 01/30/2024] [Indexed: 02/03/2024] Open
Abstract
Pyridine compounds are one of the most important heterocyclic derivatives showing wide ranges in biological and pharmacological activities. Green chemistry eliminates or reduces the generation of hazardous compounds. It prevents pollution at a molecular level. The microwave technique used in heterocyclic compound synthesis is also an important branch of green chemistry techniques. In this study, we report designing and synthesizing a new pyridine-bearing pentose moiety via a one-pot multicomponent reaction using D-glucose and also investigate its behavior and reactivity toward some simple and heterocyclic amino derivatives. The chemical structures of the synthesized compounds were characterized and tested for their cytotoxic activities. Some of the test compounds exhibited slight to high cytotoxic activities against Caco2 (colon cancer) cells, HepG2 (hepatocellular carcinoma) cells and MCF-7 (human breast cancer) cells by MTT assay. The results showed clearly that compound 4 and compound 8 displayed strongest to moderate cytotoxic activity against the HepG2, Caco2 and MCF-7 respectively and compound 1 showed good activity against MCF-7 in comparison to the standard anticancer drug doxorubicin. These data were by cytopathological examination. An in-vivo radioactive tracing study of compound 4 proved its targeting ability to sarcoma cells in a tumor-bearing mice model. Our findings suggest that the synthesized compounds may be promising candidates as novel anticancer agents.
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Affiliation(s)
- Marwa M Mehany
- Laboratory Department, Chemistry Unit, Police Hospital, Agouza, Cairo, Egypt
| | - Olfat A Hammam
- Pathology Department, Theodor Bilharz Research Institute, Giza, Egypt
| | - Adli A Selim
- Labeled Compounds Department, Hot Laboratories Centre, Egyptian Atomic Energy Authority (EAEA), Cairo, 13759, Egypt.
| | - Galal H Sayed
- Heterocyclic Synthesis Lab., Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, 11566, Egypt
| | - Kurls E Anwer
- Heterocyclic Synthesis Lab., Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo, 11566, Egypt
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2
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Tyagi S, Mishra R, Mazumder R, Mazumder A. Current Market Potential and Prospects of Copper-based Pyridine Derivatives: A Review. Curr Mol Med 2024; 24:1111-1123. [PMID: 37496249 DOI: 10.2174/1566524023666230726160056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 07/28/2023]
Abstract
Nicotine, minodronic acid, nicotinamide (niacin), zolpidem, zolimidine, and other pyridine-based chemicals play vital roles in medicine and biology. Pyridinecontaining drugs are widely available on the market to treat a wide range of human ailments. As a result of these advances, pyridine research is continually expanding, and there are now higher expectations for how it may aid in the treatment of numerous ailments. This evaluation incorporates data acquired from sources, like PubMed, to provide a thorough summary of the approved drugs and bioactivity data for compounds containing pyridine. Most of the reactions discussed in this article will provide readers with a deeper understanding of various pyridine-related examples, which is necessary for the creation of copper catalysis-based synthetic processes that are more accessible, secure, environmentally friendly, and practical, and that also have higher accuracy and selectivity. This paper also discusses significant innovations in the multi-component copper-catalyzed synthesis of N-heterocycles (pyridine), with the aim of developing precise, cost-effective, and environmentally friendly oxygenation and oxidation synthetic methods for the future synthesis of additional novel pyridine base analogs. Therefore, the review article will serve as a novel platform for researchers investigating copperbased pyridine compounds.
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Affiliation(s)
- Shivani Tyagi
- Noida Institute of Engineering and Technology (Pharmacy Institute), Knowledge Park-2, Plot 19, Greater Noida, 201306, India
| | - Rakhi Mishra
- Noida Institute of Engineering and Technology (Pharmacy Institute), Knowledge Park-2, Plot 19, Greater Noida, 201306, India
| | - Rupa Mazumder
- Noida Institute of Engineering and Technology (Pharmacy Institute), Knowledge Park-2, Plot 19, Greater Noida, 201306, India
| | - Avijit Mazumder
- Noida Institute of Engineering and Technology (Pharmacy Institute), Knowledge Park-2, Plot 19, Greater Noida, 201306, India
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3
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Tiwari S, Ravikanth M. Synthesis, Spectral, Redox and Theoretical Studies of Stable Nonaromatic Dicarba Dithia Hexaphyrin(2.0.1.1.1.0)s with Two Inverted Thiophenes. J Org Chem 2023. [PMID: 37276457 DOI: 10.1021/acs.joc.3c00680] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A series of dicarba dithia hexaphyrin(2.0.1.1.1.0)s containing two p-phenylene rings, two thiophene rings, and two pyrrole rings connected via five meso carbons were synthesized by condensing the key precursor, hexapyrrane, which was prepared over a sequence of steps, with the appropriate aromatic aldehyde under acid catalytic conditions followed by alumina chromatographic purification. Detailed one-dimensional (1D) and two-dimensional (2D) NMR studies revealed that the two thiophene rings were inverted and facing outward from the macrocyclic core. Interestingly, one of the inverted thiophene rings adopts a normal orientation in the protonated derivatives of macrocycles generated by addition of trifluoroacetic acid to the appropriate macrocyclic solution. The spectroscopic studies support the non-aromatic nature of macrocycles, and the macrocycles exhibit a distinct sharp band at ∼425 nm along with a broad band in the range of 550-1000 nm, which experienced a red shift with a clear color change in the protonated derivatives. The redox studies showed lower oxidation potentials, indicating their electron-rich nature. The density functional theoretical (DFT) studies showed that the hexaphyrins adopt oval-shaped structures, and time-dependent-DFT (TD-DFT) studies parallelly matched the experimental observations of macrocycles.
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Affiliation(s)
- Shubham Tiwari
- Department of Chemistry, IIT Bombay, Powai, Mumbai 400076, India
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4
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Mekhail MA, Pota K, Kharel S, Freire DM, Green KN. Pyridine modifications regulate the electronics and reactivity of Fe-pyridinophane complexes. Dalton Trans 2023; 52:892-901. [PMID: 36537287 PMCID: PMC10903111 DOI: 10.1039/d2dt03485a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
12-Membered pyridinophanes are the focus of many studies as biological mimics, chelators, and catalytic precursors. Therefore, the desire to tune the reactivity of pyridinophanes to better control the applications of derivative metal complexes has inspired many structure-activity relationship studies. However, the separation of structural versus electronic changes imparted by ligand modification has made these structure-activity relationship studies of transition metal catalysts challenging to define. In this work we show that 4-substitution of the pyridine ring in 12-membered tetra-aza pyridinophanes successfully provides a regulatory handle on the electronic properties of the metal center and, therefore, the catalytic C-C coupling activity of the respective iron complexes. The C-C coupling reaction catalyzed by Fe(L1-L6) provides a range of yields (32-58%) that directly correlate with iron redox potentials (ΔE1/2 = 152 mV) and metal binding constants (Δlog β = 3.45), while the geometry of the complexes was virtually indistinguishable. These are the first results to definitively show the redox potential and metal binding as independent properties from the coordination chemistry in one ligand series. Adjustments to these chemical properties were then shown to provide a regulatory handle for the C-C coupling reactivity tuned via pyridine substitution in pyridinophanes.
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Affiliation(s)
- Magy A Mekhail
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
| | - Sugam Kharel
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
| | - David M Freire
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
| | - Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, Fort Worth, Texas 76129, USA.
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5
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Panza N, di Biase A, Caselli A. Structural and spectroscopical characterization of µ-oxo bridged Iron(III) bromide complexes of Pyclen ligands. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Patel AK, Rathor SS, Samanta S. Regioselective access to di- and trisubstituted pyridines via a metal-oxidant-solvent-free domino reaction involving 3-chloropropiophenones. Org Biomol Chem 2022; 20:6759-6765. [PMID: 35972042 DOI: 10.1039/d2ob01193j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A remarkable metal-oxidant-solvent- and base-free domino route for regioselective access to a wide range of 2,4-di- and 2,3,4/6-trisubstituted pyridines including carbo- and heterocyclic fused pyridines is reported. This [3C + 2C + 1N] cyclization reaction occurs between 3-chloropropiophenones (3C units), enolizable acyclic/cyclic ketones (2C sources) and NH4OAc as a robust N source under neat conditions under an open atmosphere, producing new C=C and C=N-C bonds in highly chemo- and regioselective manners. Interestingly, this eco-friendly method has many positive features: excellent functional group tolerance, broad substrate scope, good to excellent regioselectivities, promising yields, no-unwanted products, neutral reaction conditions and appropriateness for large-scale synthesis. Mechanism studies reveal that the in situ generated β-amino ketone from 3-chloropropiophenone and an ammonium salt undergoes C=N bond formation with a ketone followed by an intramolecular cyclization process (C=C bond), which are the decisive steps for pyridine synthesis.
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Affiliation(s)
- Ashvani Kumar Patel
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Shikha Singh Rathor
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
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7
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Panza N, Soave R, Cargnoni F, Trioni MI, Caselli A. Experimental and theoretical insight into the mechanism of CO2 cycloaddition to epoxides catalyzed by ammonium ferrates. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Li F, Long L, He YM, Li Z, Chen H, Fan QH. Manganese-Catalyzed Asymmetric Formal Hydroamination of Allylic Alcohols: A Remarkable Macrocyclic Ligand Effect. Angew Chem Int Ed Engl 2022; 61:e202202972. [PMID: 35438237 DOI: 10.1002/anie.202202972] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Indexed: 12/23/2022]
Abstract
A unique family of chiral peraza N6 -macrocyclic ligands, which are conformationally rigid and have a tunable saddle-shaped cavity, is described. Utilizing their manganese(I) complexes, the first example of earth-abundant transition metal-catalyzed asymmetric formal anti-Markovnikov hydroamination of allylic alcohols was realized, providing a practical access to synthetically important chiral γ-amino alcohols in excellent yields and enantioselectivities (up to 99 % yield and 98 % ee). The single-crystal structure of a MnI complex indicates that the manganese atom coordinates with the chiral dialkylamine moiety in a bidentate fashion. Further DFT calculations revealed that five of the six nitrogen atoms in the ligand were engaged in multiple noncovalent interactions with Mn, an isopropanol molecule, and a β-amino ketone intermediate via coordination, hydrogen bonding, and/or CH⋅⋅⋅π interactions in the transition state, showing a remarkable role of the macrocyclic framework.
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Affiliation(s)
- Faju Li
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Linhong Long
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Yan-Mei He
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Zeyu Li
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Hui Chen
- CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Qing-Hua Fan
- CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.,Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
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9
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Fesenko AA, Shutalev AD. A general and stereoselective approach to 14-membered cyclic bis-semicarbazones involving BF 3-catalyzed amidoalkylation of 2-(trimethylsilyloxy)propene. Org Biomol Chem 2022; 20:4569-4588. [PMID: 35593300 DOI: 10.1039/d2ob00644h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A general and stereoselective five-step approach to 14-membered cyclic bis-semicarbazones, 5,12-diaryl-7,14-dimethyl-1,2,4,8,9,11-hexaazacyclotetradeca-7,14-diene-3,10-diones, starting from aldehyde semicarbazones has been developed. The key intermediates, 4-(3-oxobut-1-yl)semicarbazones, were prepared by BF3-catalyzed amidoalkylation of 2-(trimethylsilyloxy)propene with 4-[(aryl)(methoxy)methyl]- or 4-[(aryl)(tosyl)methyl]semicarbazones. Treatment of these intermediates with excess of hydrazine gave hydrazones of 4-(3-oxobut-1-yl)semicarbazones or 4-(3-oxobut-1-yl)semicarbazides, which in the presence of TsOH were converted into the target macrocycles. All steps of this approach could be scaled up easily to the multi-gram level.
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Affiliation(s)
- Anastasia A Fesenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation.
| | - Anatoly D Shutalev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation.
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10
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Li F, Long L, He Y, Li Z, Chen H, Fan Q. Manganese‐Catalyzed Asymmetric Formal Hydroamination of Allylic Alcohols: A Remarkable Macrocyclic Ligand Effect. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Faju Li
- CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Linhong Long
- CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Yan‐Mei He
- CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Zeyu Li
- CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Hui Chen
- CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Qing‐Hua Fan
- CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry, Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Beijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
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11
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Ahmed AAM, Mekky AEM, Sanad SMH. Effective synthesis of new benzo-fused macrocyclic and heteromacrocyclic bis(Schiff bases). JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-021-02409-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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12
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Rawat N, Ojha B, Sinha A, Ravikanth M. Synthesis of Pyridine Containing Crowned Fused Expanded Porphyrins. Chem Asian J 2022; 17:e202101425. [PMID: 35244342 DOI: 10.1002/asia.202101425] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/22/2022] [Indexed: 11/07/2022]
Abstract
New examples of nonaromatic fused expanded porphyrins containing both pyridine and crown ether moiety as a part of macrocyclic framework were synthesized by condensing pyridine based pentapyrrane with polyether based diol in CH 2 Cl 2 in the presence of one equivalent of BF 3 ·OEt 2 under inert conditions followed by oxidation with DDQ in open air. The condensation was expected to form pyridine containing crowned expanded porphyrins but resulted in the formation of fused crowned expanded porphyrins due to intramolecular fusion of two pyrrole "N"s with two adjacent inverted thiophene "C"s as revealed by X-ray crystallography obtained for one of the macrocycle. The HRMS and NMR study supported the formation of fused crowned pyridine containing expanded porphyrins, and the macrocycles showed simple well-resolved NMR spectra where all resonances were identified easily by 2D NMR spectroscopy. The macrocycles exhibited typical nonaromatic absorption features and showed one broad band with peak maxima at 535 nm and one or two shoulder bands in the higher energy region. The protonation studies resulted in clear colour change from purple to blue and absorption bands experienced bathochromic shifts with a broad band at 662 nm which was extended up to 800 nm. The electrochemical studies revealed that the macrocycles were easier to oxidize but difficult to reduce. DFT studies indicated that the macrocycle attains a very puckered and distorted 'U' shaped structure owing to the flexibility of the crown ether chain and TD-DFT studies corroborated experimental results. The preliminary studies indicated that the macrocycles could be used as colorimetric optical sensor for detection of Cu 2+ ion.
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Affiliation(s)
- Nisha Rawat
- IIT Bombay: Indian Institute of Technology Bombay, Chemistry, INDIA
| | - Belarani Ojha
- IIT Bombay: Indian Institute of Technology Bombay, Chemistry, INDIA
| | - Avisikta Sinha
- IIT Bombay: Indian Institute of Technology Bombay, Chemistry, INDIA
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13
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Panza N, Tseberlidis G, Caselli A, Vicente R. Recent progresses in the chemistry of 12-membered pyridine-containing tetraazamacrocycles: From synthesis to catalysis. Dalton Trans 2022; 51:10635-10657. [DOI: 10.1039/d2dt00597b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article provides an overview (non-comprehensive) on recent developments regarding pyridine-containing 12-membered tetraazamacrocycles with pyclen or Py2N2 backbones and their metal complexes from 2017 to the present. Firstly, the synthesis...
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14
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Liu C, Wang Y, Liu Q. Manganese-Catalyzed Asymmetric Formal Hydroamination of Allylic Alcohols Enabled by a Remarkable Macrocyclic Ligand Effect. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202200037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Ahmed AAM, Mekky AEM, Sanad SMH. Effective synthesis of new benzo‐fused macrocyclic and thiamacrocyclic dilactams and related pyrazolo‐fused macrocycles. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4383] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ahmed A. M. Ahmed
- Chemistry Department, Faculty of Science Cairo University Giza Egypt
- Common First Year Deanship Jouf University Sakaka Saudi Arabia
| | - Ahmed E. M. Mekky
- Chemistry Department, Faculty of Science Cairo University Giza Egypt
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16
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Guin S, Majee D, Samanta S. Unmasking the reverse reactivity of cyclic N-sulfonyl ketimines: multifaceted applications in organic synthesis. Chem Commun (Camb) 2021; 57:9010-9028. [PMID: 34498642 DOI: 10.1039/d1cc03439a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The chemistry related to the exploration of cyclic N-sulfonyl ketimines and their derivatives has attracted significant attention in the last few decades because of their intriguing structures and properties. They serve broadly as reactive synthons in various reactions to create a diverse set of synthetically and biologically attractive molecules. Furthermore, these moieties, which possess multiple heteroatoms (N, O and S), display or can enhance many biological activities. In the case of synthetic reactions, chemists mainly focus on the chemical manipulation of the highly reactive prochiral CN bond of N-sulfonyl ketimines. Besides their traditional role as electrophiles, N-sulfonyl ketimines possess α-Csp3-H protons, and thus behave as potential carbonucleophiles, where they can undergo several C-X (X = C, N and O) bond-forming reactions with different types of electrophiles under various conditions to form a wide range of fascinating asymmetric and non-asymmetric versions of fused heterocycles, carbocycles, spiro-fused skeletons, pyridines, pyrroles, etc. Herein, we highlight the recent examples from our research work and others covering the scope of cyclic N-sulfonyl ketimines as useful carbonucleophiles. In addition, the detailed mechanistic studies of the above-mentioned reactions are also presented.
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Affiliation(s)
- Soumitra Guin
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
| | - Debashis Majee
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, India.
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17
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Unexpected “ferrate” species as single-component catalyst for the cycloaddition of CO2 to epoxides. J CO2 UTIL 2021. [DOI: 10.1016/j.jcou.2021.101635] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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18
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Ulantikov AA, Gayfulin YM, Sukhikh TS, Ryadun AA, Ryzhikov MR, Mironov YV. SYNTHESIS, STRUCTURE, AND PHYSICOCHEMICAL PROPERTIES OF MOLECULAR RHENIUM CLUSTER COMPLEXES WITH 4-PHENYLPYRIDINE MOLECULES AS TERMINAL LIGANDS. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621070040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Kovacs D, Kocsi D, Wells JAL, Kiraev SR, Borbas KE. Electron transfer pathways in photoexcited lanthanide(iii) complexes of picolinate ligands. Dalton Trans 2021; 50:4244-4254. [PMID: 33688904 DOI: 10.1039/d1dt00616a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A series of luminescent lanthanide(iii) complexes consisting of 1,4,7-triazacyclononane frameworks and three secondary amide-linked carbostyril antennae were synthesised. The metal binding sites were augmented with two pyridylcarboxylate donors yielding octadentate ligands. The antennae carried methyl, methoxymethyl or trifluoromethyl substituents in their 4-positions, allowing for a range of excited state energies and antenna electronic properties. The 1H NMR spectra of the Eu(iii) complexes were found to be analogous to each other. Similar results were obtained in the solid-state by single-crystal X-ray crystallography, which showed the structures to have nine-coordinate metal ions with heavily distorted tricapped trigonal prismatic geometries. Steady-state and time-resolved luminescence spectroscopy showed that the antennae could sensitize both Tb(iii) and Eu(iii), however, quantum yields were lower than in other octadentate complexes lacking pyridylcarboxylate. Complexes with more electron-poor pyridines were less emissive even when equipped with the same antenna. The oxidation and reduction potentials of the antennae and the pyridinecarboxylates, respectively, were determined by cyclic voltammetry. The obtained values were consistent with electron transfer from the excited antenna to the pyridine providing a previously unexplored quenching pathway that could efficiently compete with energy transfer to the lanthanide. These results show the crucial impact that photophysically innocent ligand binding sites can have on lanthanide luminescence.
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Affiliation(s)
- Daniel Kovacs
- Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120, Uppsala, Sweden.
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20
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Panza N, Biase A, Rizzato S, Gallo E, Tseberlidis G, Caselli A. Catalytic Selective Oxidation of Primary and Secondary Alcohols Using Nonheme [Iron(III)(Pyridine‐Containing Ligand)] Complexes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001201] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nicola Panza
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
| | - Armando Biase
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
| | - Silvia Rizzato
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
| | - Emma Gallo
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
| | - Giorgio Tseberlidis
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
- Department of Materials Science and Solar Energy Research Center (MIB‐SOLAR) University of Milano‐Bicocca Via Cozzi 55 20125 Milano Italy
| | - Alessandro Caselli
- Department of Chemistry Università degli Studi di Milano and CNR‐SCITEC via Golgi 19 – 20133 Milano Italy
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21
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Pirovano V, Caselli A, Colombo A, Dragonetti C, Giannangeli M, Rossi E, Brambilla E. Synthesis of 2‐alkenylidene‐3‐oxoindolines: cascade reactions of 4
H
‐furo [3,2‐
b
]indoles with diazoacetates catalyzed by a Cu(I) macrocyclic pyridine‐containing ligand (PcL) complex. ChemCatChem 2020. [DOI: 10.1002/cctc.202000887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
| | - Alessandro Caselli
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Alessia Colombo
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Claudia Dragonetti
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Matteo Giannangeli
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
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22
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Garanzini D, Pirovano V, Menghi I, Celentano G, Rizzato S, Rossi E, Caselli A, Abbiati G. [Ag(PcL)]‐Catalysed Domino Approach to 6‐Substituted Benzoxazino Isoquinolines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Davide Garanzini
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
| | - Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
| | - Ilaria Menghi
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi, 19 20133 Milano Italy
| | - Giuseppe Celentano
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
| | - Silvia Rizzato
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi, 19 20133 Milano Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
| | - Alessandro Caselli
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi, 19 20133 Milano Italy
- CNR‐SCITEC Via Golgi, 19 20133 Milano Italy
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian, 21 20133 Milano Italy
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23
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Pirovano V, Hamdan G, Garanzini D, Brambilla E, Rossi E, Caselli A, Abbiati G. [Ag(PcL)]-Catalyzed Domino Reactions of 2-Alkynylbenzaldehydes with Electron-Poor Anilines: Synthesis of 1-Aminoisochromenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000275] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
| | - Gabriele Hamdan
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
| | - Davide Garanzini
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
| | - Alessandro Caselli
- Dipartimento di Chimica; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano and CNR-SCITEC; Via Golgi, 19 20133 Milano Italy
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche; Sezione di Chimica Generale e Organica “A. Marchesini”; Università degli Studi di Milano; Via Venezian, 21 20133 Milano Italy
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24
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Yepremyan A, Mekhail MA, Niebuhr BP, Pota K, Sadagopan N, Schwartz TM, Green KN. Synthesis of 12-Membered Tetra-aza Macrocyclic Pyridinophanes Bearing Electron-Withdrawing Groups. J Org Chem 2020; 85:4988-4998. [PMID: 32208700 DOI: 10.1021/acs.joc.0c00188] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The number of substituted pyridine pyridinophanes found in the literature is limited due to challenges associated with 12-membered macrocycle and modified pyridine synthesis. Most notably, the electrophilic character at the 4-position of pyridine in pyridinophanes presents a unique challenge for introducing electrophilic chemical groups. Likewise, of the few reported, most substituted pyridine pyridinophanes in the literature are limited to electron-donating functionalities. Herein, new synthetic strategies for four new macrocycles bearing the electron-withdrawing groups CN, Cl, NO2, and CF3 are introduced. Potentiometric titrations were used to determine the protonation constants of the new pyridinophanes. Further, the influence of such modifications on the chemical behavior is predicted by comparing the potentiometric results to previously reported systems. X-ray diffraction analysis of the 4-Cl substituted species and its Cu(II) complex are also described to demonstrate the metal binding nature of these ligands. DFT analysis is used to support the experimental findings through energy calculations and ESP maps. These new molecules serve as a foundation to access a range of new pyridinophane small molecules and applications in future work.
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Affiliation(s)
- Akop Yepremyan
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Magy A Mekhail
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Brian P Niebuhr
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Nishanth Sadagopan
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Timothy M Schwartz
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
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25
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Savastano M, Fiaschi M, Ferraro G, Gratteri P, Mariani P, Bianchi A, Bazzicalupi C. Sensing Zn 2+ in Aqueous Solution with a Fluorescent Scorpiand Macrocyclic Ligand Decorated with an Anthracene Bearing Tail. Molecules 2020; 25:E1355. [PMID: 32192025 PMCID: PMC7146481 DOI: 10.3390/molecules25061355] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/13/2020] [Accepted: 03/15/2020] [Indexed: 01/16/2023] Open
Abstract
Synthesis of the new scorpiand ligand L composed of a [9]aneN3 macrocyclic ring bearing a CH2CH2NHCH2-anthracene tail is reported. L forms both cation (Zn2+) and anion (phosphate, benzoate) complexes. In addition, the zinc complexes of L bind these anions. The equilibrium constants for ligand protonation and complex formation were determined in 0.1 M NaCl aqueous solution at 298.1 ± 0.1 K by means of potentiometric (pH-metric) titrations. pH Controlled coordination/detachment of the ligand tail to Zn2+ switch on and off the fluorescence emission from the anthracene fluorophore. Accordingly, L is able to sense Zn2+ in the pH range 6-10 down to nM concentrations of the metal ion. L can efficiently sense Zn2+ even in the presence of large excess of coordinating anions, such as cyanide, sulphide, phosphate and benzoate, despite their ability to bind the metal ion.
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Affiliation(s)
- Matteo Savastano
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Matteo Fiaschi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Giovanni Ferraro
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Paola Gratteri
- Department of NEUROFARBA-Pharmaceutical and Nutraceutical section, and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence, Via Ugo Schiff 6, 50019 Sesto Fiorentino, Italy;
| | - Palma Mariani
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Antonio Bianchi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
| | - Carla Bazzicalupi
- Department of Chemistry “Ugo Schiff”, University of Florence, Via della Lastruccia, 3-13, 50019 Sesto Fiorentino, Italy; (M.S.); (M.F.); (G.F.); (P.M.); (C.B.)
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26
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Ahmed AAM, Mekky AEM, Elwahy AHM, Sanad SMH. Facile synthesis and characterization of novel benzo-fused macrocyclic dicarbonitriles and pyrazolo-fused macrocycles containing thiazole subunits. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2019.1689269] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ahmed A. M. Ahmed
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
- Preparatory Year Deanship, Jouf University, Sakaka, Kingdom of Saudi Arabia
| | - Ahmed E. M. Mekky
- Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt
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27
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Prakash M, Gudimella SK, Lodhi R, Guin S, Samanta S. NH 4OAc-Promoted Domino Route to Hydroxyarylated Unsymmetrical Pyridines under Neat Conditions. J Org Chem 2020; 85:2151-2167. [PMID: 31875454 DOI: 10.1021/acs.joc.9b02896] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new metal-, oxidant-, and solvent-free ecofriendly domino method has been established for modular synthesis of a diverse range of medicinally promising hydroxyarylated unsymmetrical pyridines in good to high chemical yields with an excellent regioselectivity. This domino process involves a range of N-sulfonyl ketimines as C,N-binucleophiles, enolizable ketones, and aromatic/heteroaromatic aldehydes using ammonium acetate as an ideal promoter under neat conditions, which creates two new C-C bonds and one C-N bond. Notably, the neutral reaction conditions are mild enough to tolerate a range of functionalities and cover a variety of substrates, thus bestowing a powerful avenue to access tri- and tetrasubstituted pyridines including carbo- and heterocyclic fused ones. Interestingly, a practical, scalable, and high-yielding synthesis of pyridylphenol derivatives was successfully accomplished by our unique method.
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Affiliation(s)
- Meher Prakash
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Santosh K Gudimella
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Rajni Lodhi
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Soumitra Guin
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Sampak Samanta
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
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28
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Mekhail MA, Pota K, Schwartz TM, Green KN. Functionalized pyridine in pyclen-based iron( iii) complexes: evaluation of fundamental properties. RSC Adv 2020; 10:31165-31170. [PMID: 34094507 PMCID: PMC8174454 DOI: 10.1039/d0ra05756h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Six iron(iii) pyridinophane complexes were evaluated to determine whether functionalizing the pyridine ring could introduce a handle by which electrochemical properties and thermodynamic stability can be tuned.
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Affiliation(s)
- Magy A. Mekhail
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Kristof Pota
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Timothy M. Schwartz
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
| | - Kayla N. Green
- Department of Chemistry and Biochemistry
- Texas Christian University
- Fort Worth
- USA
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29
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Nath BD, Takaishi K, Ema T. Macrocyclic multinuclear metal complexes acting as catalysts for organic synthesis. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01894h] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Recent progress in homogeneous catalysis with macrocyclic multinuclear metal complexes (categories A–C) is overviewed.
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Affiliation(s)
- Bikash Dev Nath
- Division of Applied Chemistry
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
| | - Kazuto Takaishi
- Division of Applied Chemistry
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
| | - Tadashi Ema
- Division of Applied Chemistry
- Graduate School of Natural Science and Technology
- Okayama University
- Okayama 700-8530
- Japan
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30
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Johnston HM, Pota K, Barnett MM, Kinsinger O, Braden P, Schwartz TM, Hoffer E, Sadagopan N, Nguyen N, Yu Y, Gonzalez P, Tircsó G, Wu H, Akkaraju G, Chumley MJ, Green KN. Enhancement of the Antioxidant Activity and Neurotherapeutic Features through Pyridol Addition to Tetraazamacrocyclic Molecules. Inorg Chem 2019; 58:16771-16784. [PMID: 31774280 PMCID: PMC7323501 DOI: 10.1021/acs.inorgchem.9b02932] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Alzheimer's and other neurodegenerative diseases are chronic conditions affecting millions of individuals worldwide. Oxidative stress is a consistent component described in the development of many neurodegenerative diseases. Therefore, innovative strategies to develop drug candidates that overcome oxidative stress in the brain are needed. To target these challenges, a new, water-soluble 12-membered tetraaza macrocyclic pyridinophane L4 was designed and produced using a building-block approach. Potentiometric data show that the neutral species of L4 provides interesting zwitterionic behavior at physiological pH, akin to amino acids, and a nearly ideal isoelectric point of 7.3. The copper(II) complex of L4 was evaluated by X-ray diffraction and cyclic voltammetry to show the potential modes of antioxidant activity derived, which was also demonstrated by 2,2-diphenyl-1-picrylhydrazyl and coumarin carboxylic acid antioxidant assays. L4 was shown to have dramatically enhanced antioxidant activity and increased biological compatibility compared to parent molecules reported previously. L4 attenuated hydrogen peroxide (H2O2)-induced cell viability loss more efficiently than precursor molecules in the mouse hippocampal HT-22 cell model. L4 also showed potent (fM) level protection against H2O2 cell death in a BV2 microglial cell culture. Western blot studies indicated that L4 enhanced the cellular antioxidant defense capacity via Nrf2 signaling activation as well. Moreover, a low-cost analysis and high metabolic stability in phase I and II models were observed. These encouraging results show how the rational design of lead compounds is a suitable strategy for the development of treatments for neurodegenerative diseases where oxidative stress plays a substantial role.
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Affiliation(s)
- Hannah M. Johnston
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Madalyn M. Barnett
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Olivia Kinsinger
- Department of Biology, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Paige Braden
- Department of Biology, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Timothy M. Schwartz
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Emily Hoffer
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Nishanth Sadagopan
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Nam Nguyen
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Yu Yu
- Pharmaceutical Sciences, University of North Texas System College of Pharmacy, University of North Texas (UNT) Health Science Center, Fort Worth, Texas 76107, United States
| | - Paulina Gonzalez
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen H-4010, Hungary
| | - Hongli Wu
- Pharmaceutical Sciences, University of North Texas System College of Pharmacy, University of North Texas (UNT) Health Science Center, Fort Worth, Texas 76107, United States
- North Texas Eye Research Institute, University of North Texas (UNT) Health Science Center, Fort Worth, Texas 76107, United States
| | - Giridhar Akkaraju
- Department of Biology, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Michael J. Chumley
- Department of Biology, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
| | - Kayla N. Green
- Department of Chemistry and Biochemistry, Texas Christian University (TCU), 2950 S. Bowie, Fort Worth, Texas 76129, United States
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31
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Green KN, Pota K, Tircsó G, Gogolák RA, Kinsinger O, Davda C, Blain K, Brewer SM, Gonzalez P, Johnston HM, Akkaraju G. Dialing in on pharmacological features for a therapeutic antioxidant small molecule. Dalton Trans 2019; 48:12430-12439. [PMID: 31342985 PMCID: PMC6863055 DOI: 10.1039/c9dt01800j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The pyridinophane molecule L2 (3,6,9,15-tetraazabicyclo[9.3.1]penta-deca-1(15),11,13-trien-13-ol) has shown promise as a therapuetic for neurodegenerative diseases involving oxidative stress and metal ion misregulation. Protonation and metal binding stability constants with Mg2+, Ca2+, Cu2+, and Zn2+ ions were determined to further explore the therapeutic and pharmacological potential of this water soluble small molecule. These studies show that incorporation of an -OH group in position 4 of the pyridine ring decreases the pI values compared to cyclen and L1 (3,6,9,15-tetraazabicyclo[9.3.1]penta-deca-1(15),11,13-triene). Furthermore, this approach tunes the basicity of the tetra-aza macrocyclic ligand through the enhanced resonance stabilization of the -OH in position 4 and rigidity of the pyridine ring such that L2 has increased basicity compared to previously reported tetra-aza macrocycles. A metal binding preference for Cu2+, a redox cycling agent known to produce oxidative stress, indicates that this would be the in vivo metal target of L2. However, the binding constant of L2 with Cu2+ is moderated compared to cyclen due to the rigidity of the ligand and shows how ligand design can be used to tune metal selectivity. An IC50 = 298.0 μM in HT-22 neuronal cells was observed. Low metabolic liability was determined in both Phase I and II in vitro models. Throughout these studies other metal binding systems were used for comparison and as appropriate controls. The reactivity reported to date and pharmacological features described herein warrant further studies in vivo and the pursuit of L2 congeners using the knowledge that pyridine substitution in a pyridinophane can be used to tune the structure of the ligand and retain the positive therapeutic outcomes.
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Affiliation(s)
- Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4010, Hungary
| | - Réka Anna Gogolák
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4010, Hungary
| | - Olivia Kinsinger
- Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
| | - Collin Davda
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Kimberly Blain
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA. and Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
| | - Samantha M Brewer
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Paulina Gonzalez
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Hannah M Johnston
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Giridhar Akkaraju
- Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
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32
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Tseberlidis G, Demonti L, Pirovano V, Scavini M, Cappelli S, Rizzato S, Vicente R, Caselli A. Controlling Selectivity in Alkene Oxidation: Anion Driven Epoxidation or Dihydroxylation Catalysed by [Iron(III)(Pyridine‐Containing Ligand)] Complexes. ChemCatChem 2019. [DOI: 10.1002/cctc.201901045] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Giorgio Tseberlidis
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
| | - Luca Demonti
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
| | - Valentina Pirovano
- Department of Pharmaceutical Sciences General and Organic Chemistry Section “A. Marchesini”University of Milan Via Venezian 21 Milano 20133 Italy
| | - Marco Scavini
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
| | - Serena Cappelli
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
| | - Silvia Rizzato
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
| | - Rubén Vicente
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica “Enrique Moles”Universidad de Oviedo c/ Julián Clavería 8 Oviedo 33007 Spain
| | - Alessandro Caselli
- Department of Chemistry and ISTM-CNR-MilanoUniversità degli Studi di Milano Via Golgi 19 Milano 20133 Italy
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Spin Cross-Over (SCO) Complex Based on Unsymmetrical Functionalized Triazacyclononane Ligand: Structural Characterization and Magnetic Properties. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5010019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The unsymmetrical ligand 1-(2-aminophenyl)-4,7-bis(pyridin-2-ylmethyl)-1,4,7-triazacyclononane (L6) has been prepared and characterized by NMR spectroscopy. The L6 ligand is based on the triazamacrocycle (tacn) ring that is functionalized by two flexible 2-pyridylmethyl and one rigid 2-aminophenyl groups. Reaction of this ligand with Fe(ClO4)2·xH2O led to the complex [Fe(L6)](ClO4)2 (1), which was characterized as the first Fe(II) complex based on the unsymmetrical N-functionalized tacn ligand. The crystal structure revealed a discrete monomeric [FeL6]2+ entity in which the unsymmetrical N-functionalized triazacyclononane molecule (L6) acts as hexadentate ligand. As observed in the few parent examples that are based on the symmetrical N-functionalized tacn ligands, the triazacyclononane ring is facially coordinated and the N-donor atoms of the three functional groups (two pyridine and one aniline groups) are disposed in the same side of the tacn ring, leading to a distorted FeN6 environment. The magnetic studies of 1 revealed the presence of an incomplete spin crossover (SCO) transition above 425 K, whose progress would be prevented by a very exothermic thermal decomposition at ca. 472 K, as shown by thermogravimetric and DSC measurements.
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Pankhurst JR, Paul S, Zhu Y, Williams CK, Love JB. Polynuclear alkoxy-zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO 2. Dalton Trans 2019; 48:4887-4893. [PMID: 30896006 DOI: 10.1039/c9dt00595a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reactions between alcohols and the tetranuclear ethyl-Zn complexes of an ortho-phenylene-bridged polypyrrole macrocycle, Zn4Et4(L1) 1 and the related anthracenyl-bridged macrocyclic complex, Zn4Et4(THF)4(L2) 2 have been studied. With long-chain alcohols such as n-hexanol, the clean formation of the tetranuclear hexoxide complex Zn4(OC6H13)4(L1) 3 occurs. In contrast, the use of shorter-chain alcohols such as i-propanol results in the trinuclear complex Zn3(μ2-OiPr)2(μ3-OiPr)(HL1) 4 that arises from demetalation; this complex was characterised by X-ray crystallography. The clean formation of these polynuclear zinc clusters allowed a study of their use as catalysts in the ring-opening copolymerisation (ROCOP) reaction between cyclohexene oxide and CO2. In situ reactions involving the pre-catalyst 1 and n-hexanol formed the desired polymer with the best selectivity for polycarbonate (90%) at 30 atm CO2, whilst the activity and performance of pre-catalyst 2 was poor in comparison.
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Affiliation(s)
- James R Pankhurst
- EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, UK.
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Cirulli M, Kaur A, Lewis JEM, Zhang Z, Kitchen JA, Goldup SM, Roessler MM. Rotaxane-Based Transition Metal Complexes: Effect of the Mechanical Bond on Structure and Electronic Properties. J Am Chem Soc 2018; 141:879-889. [DOI: 10.1021/jacs.8b09715] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Martina Cirulli
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Amanpreet Kaur
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - James E. M. Lewis
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London, W12 0BZ, U.K
| | - Zhihui Zhang
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Jonathan A. Kitchen
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Auckland, New Zealand
| | - Stephen M. Goldup
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Maxie M. Roessler
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
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Brewer SM, Wilson KR, Jones DG, Reinheimer EW, Archibald SJ, Prior TJ, Ayala MA, Foster AL, Hubin TJ, Green KN. Increase of Direct C-C Coupling Reaction Yield by Identifying Structural and Electronic Properties of High-Spin Iron Tetra-azamacrocyclic Complexes. Inorg Chem 2018; 57:8890-8902. [PMID: 30024738 PMCID: PMC7067264 DOI: 10.1021/acs.inorgchem.8b00777] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Macrocyclic ligands have been explored extensively as scaffolds for transition metal catalysts for oxygen and hydrogen atom transfer reactions. C-C reactions facilitated using earth abundant metals bound to macrocyclic ligands have not been well-understood but could be a green alternative to replacing the current expensive and toxic precious metal systems most commonly used for these processes. Therefore, the yields from direct Suzuki-Miyaura C-C coupling of phenylboronic acid and pyrrole to produce 2-phenylpyrrole facilitated by eight high-spin iron complexes ([Fe3+L1(Cl)2]+, [Fe3+L4(Cl)2]+, [Fe2+L5(Cl)]+, [Fe2+L6(Cl)2], [Fe3+L7(Cl)2]+, [Fe3+L8(Cl)2]+, [Fe2+L9(Cl)]+, and [Fe2+L10(Cl)]+) were compared to identify the effect of structural and electronic properties on catalytic efficiency. Specifically, catalyst complexes were compared to evaluate the effect of five properties on catalyst reaction yields: (1) the coordination requirements of the catalyst, (2) redox half-potential of each complex, (3) topological constraint/rigidity, (4) N atom modification(s) increasing oxidative stability of the complex, and (5) geometric parameters. The need for two labile cis-coordination sites was confirmed based on a 42% decrease in catalytic reaction yield observed when complexes containing pentadentate ligands were used in place of complexes with tetradentate ligands. A strong correlation between iron(III/II) redox potential and catalytic reaction yields was also observed, with [Fe2+L6(Cl)2] providing the highest yield (81%, -405 mV). A Lorentzian fitting of redox potential versus yields predicts that these catalysts can undergo more fine-tuning to further increase yields. Interestingly, the remaining properties explored did not show a direct, strong relationship to catalytic reaction yields. Altogether, these results show that modifications to the ligand scaffold using fundamental concepts of inorganic coordination chemistry can be used to control the catalytic activity of macrocyclic iron complexes by controlling redox chemistry of the iron center. Furthermore, the data provide direction for the design of improved catalysts for this reaction and strategies to understand the impact of a ligand scaffold on catalytic activity of other reactions.
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Affiliation(s)
- Samantha M. Brewer
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, United States
| | - Kevin R. Wilson
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK 73096, United States
| | - Donald G. Jones
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK 73096, United States
| | - Eric W. Reinheimer
- Rigaku Oxford Diffraction, 9009 New Trails Drive The Woodlands, TX, United States
| | - Stephen J. Archibald
- Department of Chemistry and Positron Emission Tomography Research Centre, University of Hull, Cottingham Road, Hull HU6 7RX, UK
| | - Timothy J. Prior
- Department of Chemistry and Positron Emission Tomography Research Centre, University of Hull, Cottingham Road, Hull HU6 7RX, UK
| | - Megan A. Ayala
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK 73096, United States
| | - Alexandria L. Foster
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK 73096, United States
| | - Timothy J. Hubin
- Department of Chemistry and Physics, Southwestern Oklahoma State University, 100 Campus Drive, Weatherford, OK 73096, United States
| | - Kayla N. Green
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, United States
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Ghanbari B, Shahhoseini L, Hosseini H, Bagherzadeh M, Owczarzak A, Kubicki M. Synthesis of Pd(II) large dinuclear macrocyclic complex tethered through two dipyridine-bridged aza-crowns as an efficient copper- and phosphine-free Sonogashira catalytic reaction. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Brewer SM, Palacios PM, Johnston HM, Pierce BS, Green KN. Isolation and identification of the pre-catalyst in iron-catalyzed direct arylation of pyrrole with phenylboronic acid. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pirovano V, Brambilla E, Tseberlidis G. [Copper(I)(Pyridine-Containing Ligand)] Catalyzed Regio- and Steroselective Synthesis of 2-Vinylcyclopropa[b]indolines from 2-Vinylindoles. Org Lett 2018; 20:405-408. [DOI: 10.1021/acs.orglett.7b03704] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Valentina Pirovano
- Dipartimento
di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica “A.
Marchesini”, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Elisa Brambilla
- Dipartimento
di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica “A.
Marchesini”, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Giorgio Tseberlidis
- Dipartimento
di Chimica, Università degli Studi di Milano, Via Golgi
19, 20133, Milano, Italy
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