1
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Romero-Soto CA, Iglesias AL, Velázquez-Ham AF, Camarena-Díaz JP, Correa-Ayala E, Gomez-Lopez JL, Chávez D, Ochoa-Terán A, Aguirre G, Rheingold AL, Grotjahn DB, Parra-Hake M, Miranda-Soto V. Ruthenium complexes with triazenide ligands bearing an N-heterocyclic moiety, and their catalytic properties in the reduction of nitroarenes. RSC Adv 2024; 14:24019-24030. [PMID: 39086523 PMCID: PMC11290092 DOI: 10.1039/d4ra04813j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Accepted: 07/19/2024] [Indexed: 08/02/2024] Open
Abstract
A series of ruthenium complexes of formulae [RuCl(triazenide)(p-cymene)] have been synthesized using as ligand a triazenide monofunctionalized with an N-heterocyclic moiety. Nuclear magnetic resonance, high resolution mass spectrometry and X-ray diffraction were used to characterize the triazenide ligands and their complexes. In addition, these ruthenium complexes catalyzed the reduction of nitrobenzene to aniline in the presence of sodium borohydride and ethanol as solvent at room temperature. Notably, complex 5 was especially active in the reduction of nitroarenes substituted at the aromatic ring with electron-withdrawing or electron-donating fuctional groups affording the desired arylamines in good to excellent yields (80-100%). The role of the N-heterocyclic moiety on catalysis was explored.
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Affiliation(s)
- Christian A Romero-Soto
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Ana L Iglesias
- Facultad de Ciencias de la Ingeniería y Tecnología, Universidad Autónoma de Baja California Mexico
| | - Amor F Velázquez-Ham
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Juan P Camarena-Díaz
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Erick Correa-Ayala
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Jessica L Gomez-Lopez
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Daniel Chávez
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Adrián Ochoa-Terán
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Gerardo Aguirre
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California at San Diego CA 92093 USA
| | - Douglas B Grotjahn
- Department of Chemistry and Biochemistry, San Diego State University CA 92182 USA
| | - Miguel Parra-Hake
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
| | - Valentín Miranda-Soto
- Tecnológico Nacional de México/Instituto Tecnológico de Tijuana/Centro de Graduados e Investigación en Química Blvd. Alberto Limón Padilla S/N 22454 Tijuana BC Mexico
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2
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Lu Z, Cooney SE, McKone JR, Matson EM. Selective Hydrogenation of Azobenzene to Hydrazobenzene via Proton-Coupled Electron Transfer from a Polyoxotungstate Cluster. JACS AU 2024; 4:1310-1314. [PMID: 38665657 PMCID: PMC11041919 DOI: 10.1021/jacsau.4c00127] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 03/05/2024] [Accepted: 03/14/2024] [Indexed: 04/28/2024]
Abstract
In this report, we describe proton-coupled electron transfer (PCET) reactivity at the surface of the Keggin-type polyoxotungstate cluster [nBu4N]3[PWVI12O40] (PW12) in acetonitrile. Bond dissociation free energies (BDFEs) of the O-H groups generated upon reduction of PW12 in the presence of acid are determined through the construction of a potential-pKa diagram. The surface O-H bonds are found to be weak (BDFE(O-H)avg < 48 kcal mol-1), comparable to the BDFE of H2. This is consistent with the observed formation of H2 upon addition of a suitably strong organic acid, H2NPh2+ (pKa MeCN = 5.98), to the reduced form of the cluster. The one-electron reduced form of PW12 is isolated and used in conjunction with acid to realize the stoichiometric semihydrogenation of azobenzene via PCET from the surface of the reduced cluster.
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Affiliation(s)
- Zhou Lu
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Shannon E. Cooney
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - James R. McKone
- Departments
of Chemical and Petroleum Engineering and Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Ellen M. Matson
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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3
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Kanwal A, Afzal U, Zubair M, Imran M, Rasool N. Synthesis of anti-depressant molecules via metal-catalyzed reactions: a review. RSC Adv 2024; 14:6948-6971. [PMID: 38410364 PMCID: PMC10895647 DOI: 10.1039/d3ra06391g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/07/2024] [Indexed: 02/28/2024] Open
Abstract
Depression is one of the most mutilating conditions in the world today. It has been difficult to make advancements toward better, more effective therapies since the introduction of antidepressant medicines in the late 1950s. One important field of medicinal chemistry is the synthesis of antidepressant molecules through metal-catalyzed procedures. The important role that different transition metals, including iron, nickel, ruthenium, and others, serve as catalysts in the synthesis of antidepressants is examined in this review. Key structural motifs included in antidepressant drugs such as tricyclic antidepressants (TCAs), selective serotonin reuptake inhibitors (SSRIs), and others can be synthesized in a variety of effective ways using metal-catalyzed steps. This review examines current developments in the catalytic synthesis of antidepressants and their potential application over the previous thirteen years.
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Affiliation(s)
- Aqsa Kanwal
- Department of Chemistry, Government College University Faisalabad 38000 Pakistan +92-3085448384
| | - Uzma Afzal
- Department of Chemistry, Government College University Faisalabad 38000 Pakistan +92-3085448384
| | - Muhammad Zubair
- Department of Chemistry, Government College University Faisalabad 38000 Pakistan +92-3085448384
| | - Muhammad Imran
- Chemistry Department, Faculty of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
| | - Nasir Rasool
- Department of Chemistry, Government College University Faisalabad 38000 Pakistan +92-3085448384
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4
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Gioftsidou DK, Kallitsakis MG, Kavaratzi K, Hatzidimitriou AG, Terzidis MA, Lykakis IN, Angaridis PA. Synergy of redox-activity and hemilability in thioamidato cobalt(III) complexes for the chemoselective reduction of nitroarenes to anilines: catalytic and mechanistic investigation. Dalton Trans 2024; 53:1469-1481. [PMID: 38126463 DOI: 10.1039/d3dt02923a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Reduction of nitro-compounds to amines is one of the most often employed and challenging catalytic processes in the fine and bulk chemical industry. Herein, we present two series of mononuclear homoleptic and heteroleptic Co(III) complexes, i.e., [Co(LNS)3] and [Co(LNS)2L1L2]x+, respectively (x = 0 or 1, LNS = pyrimidine- or pyridine-thioamidato, L1/L2 = thioamidato, phosphine or pyridine), which successfully catalyze the transformation of nitroarenes to anilines by methylhydrazine. The catalytic reaction can be accomplished for a range of electronically and sterically diverse nitroarenes, using mild experimental conditions and low catalyst loadings, resulting in the corresponding anilines in high yields, with high chemoselectivity, and no side-products. Electronic and steric properties of the ligands play pivotal role in the catalytic efficacy of the respective complexes. In particular, complexes bearing ligands of high hemilability/lability and being capable of stabilizing lower metal oxidation-states exhibit the highest catalytic activity. Mechanistic investigations suggest the participation of the Co(III) complexes in two parallel reaction pathways: (a) coordination-induced activation of methylhydrazine and (b) reduction of nitroarenes to anilines by methylhydrazine, through the formation of Co(I) and Co-hydride intermediates.
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Affiliation(s)
- Dimitra K Gioftsidou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Michael G Kallitsakis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Konstantina Kavaratzi
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Antonios G Hatzidimitriou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Michael A Terzidis
- Laboratory of Chemical Biology, Department of Nutritional Sciences and Dietetics, International Hellenic University, Sindos, 57400 Thessaloniki, Greece
| | - Ioannis N Lykakis
- Laboratory of Organic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Panagiotis A Angaridis
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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5
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Chen C, Lu C, Zhao B. Deoxygenative Hydroboration of Aromatic Nitro Compounds Catalyzed by Tetra(diisopropylamido) Rare-Earth Metal-Lithium Bimetallic Complexes. J Org Chem 2023; 88:16391-16399. [PMID: 37948672 DOI: 10.1021/acs.joc.3c01905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
The first example of the reduction of a nitro compound with HBPin catalyzed by tetra(diisopropylamido) rare-earth metal-lithium bimetallic complexes LiRE(NiPr2)4(THF) (RE = La, Nd, Sm, Gd, and Y) was disclosed. A series of aromatic nitro compounds were reduced to N-borylamines in high yields (up to 99%). The derivatives of N-borylamines─amides and carbamates─were obtained in a sequential one-pot manner. Furthermore, kinetic studies of the deoxygenative hydroboration of nitro compounds were carried out.
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Affiliation(s)
- Chuanling Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Chengrong Lu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Bei Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
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6
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Yang S, He M, Wang Y, Bao M, Yu X. Visible-light-induced iron-catalyzed reduction of nitroarenes to anilines. Chem Commun (Camb) 2023; 59:14177-14180. [PMID: 37961762 DOI: 10.1039/d3cc04324j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
An efficient visible-light-induced iron-catalyzed reduction of nitroarenes to anilines by using N-ethylmorpholine (NEM) as a reductant under mild conditions has been developed. The reaction proceeds with photosensitizer-free conditions and features good to excellent yields and broad functional group tolerance. Preliminary mechanistic investigations showed that this reaction was conducted via ligand-to-metal (NEM to Fe3+) charge transfer and nitro triplet biradical-induced hydrogen atom transfer processes.
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Affiliation(s)
- Shilei Yang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.
| | - Min He
- School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenhe District, Shenyang, 110016, China
| | - Yi Wang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.
| | - Xiaoqiang Yu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China.
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7
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Dewangan C, Kumawat S, Bhatt T, Natte K. Homogenous nickel-catalyzed chemoselective transfer hydrogenation of functionalized nitroarenes with ammonia-borane. Chem Commun (Camb) 2023. [PMID: 37997758 DOI: 10.1039/d3cc05173k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Homogeneous Ni-catalyzed highly selective transfer hydrogenation of nitroarenes was successfully established using NH3BH3 as a hydrogen source. A broad range of functional groups were selectively reduced to provide the corresponding anilines in good to high yields. Further, pharmaceutically active compounds can be prepared that would otherwise be challenging to access.
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Affiliation(s)
- Chitrarekha Dewangan
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502 285, Telangana, India.
| | - Sandeep Kumawat
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502 285, Telangana, India.
| | - Tarun Bhatt
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502 285, Telangana, India.
| | - Kishore Natte
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502 285, Telangana, India.
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8
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Moradi Z, Ghorbani-Choghamarani A. Fe 3O 4@SiO 2@KIT-6@2-ATP@Cu I as a catalyst for hydration of benzonitriles and reduction of nitroarenes. Sci Rep 2023; 13:7645. [PMID: 37169905 PMCID: PMC10175259 DOI: 10.1038/s41598-023-34409-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 04/29/2023] [Indexed: 05/13/2023] Open
Abstract
In this paper, a new type of magnetic mesoporous material (Fe3O4@SiO2@KIT-6@2-ATP@CuI) was designed and synthesized and its application in the synthesis of amides and anilines was investigated. The structure of Fe3O4@SiO2@KIT-6@2-ATP@CuI was characterized and identified using FTIR, SEM, XRD, TGA, BET, VSM, and ICP techniques. An external magnet can easily remove the synthesized catalyst from the reaction medium, and be reused in several consequence runs.
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Affiliation(s)
- Zahra Moradi
- Department of Chemistry, Faculty of Sciences, Ilam University, P.O. Box 69315516, Ilam, Iran
| | - Arash Ghorbani-Choghamarani
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, P.O. Box 6517838683, Hamedan, Iran.
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9
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Li Q, Luo Y, Chen J, Xia Y. Visible-Light-Promoted Hydrogenation of Azobenzenes to Hydrazobenzenes with Thioacetic Acid as the Reductant. J Org Chem 2023; 88:2443-2452. [PMID: 36718625 DOI: 10.1021/acs.joc.2c02873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A catalyst- and metal-free hydrogenation of azobenzenes to hydrazobenzenes in the presence of thioacetic acid was achieved under visible light irradiation. The transformation was carried out under mild conditions in an air atmosphere at ambient temperature, generating a variety of hydrazobenzenes with yields up to 99%. The current process is compatible with a variety of substituents and is highly chemoselective for azo reduction when other unsaturated functionalities (carbonyl, alkenyl, alkynyl, etc.) are contained. Preliminary mechanistic study indicated that the transformation could be a radical process.
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Affiliation(s)
- Qiao Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yanshu Luo
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Jianhui Chen
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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10
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Roemer M, Proschogo N, Luck I. Copper(I) Chloride Mediated Amination of Halobenzenes via Azides: Scope, Mechanistic Aspects, and C-C Cleavage Reactions. J Org Chem 2023; 88:1522-1532. [PMID: 36668998 DOI: 10.1021/acs.joc.2c02549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Selective azidation-amination of long-chain alkanoyl halobenzenes with sodium azide, promoted by copper(I) chloride, is reported. The protocol is, apart from CuCl and NaN3, additive free and allows the isolation of versatile amine-azides. Alkyl cleavage occurs as a side reaction through an unusual Schmidt-type azide insertion adjacent to the carbonyl group, forming alkyl nitriles possibly via radical pathways. Mechanistic studies involving 15N labeling experiments and test substrates indicate that the reaction occurs via 1-azido-4-alkanoyl benzenes. The amination is applicable for substrates with electron-withdrawing groups and proceeds under mild conditions. The mechanism of the amine formation involves nitrenes. Intermediates were trapped by carrying out the reaction in the presence of the 2,2,6,6-(tetramethylpiperidin-1-yl)oxyl stable radical and characterized by high-resolution mass spectrometry. The intermediates are consistent with earlier mechanistic proposals.
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Affiliation(s)
- Max Roemer
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Nicholas Proschogo
- School of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Ian Luck
- Sydney Analytical Core Research Facility, The University of Sydney, Sydney, New South Wales 2006, Australia
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11
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Behera RR, Panda S, Ghosh R, Kumar AA, Bagh B. Manganese-Catalyzed Chemoselective Hydrosilylation of Nitroarenes: Sustainable Route to Aromatic Amines. Org Lett 2022; 24:9179-9183. [PMID: 36413437 DOI: 10.1021/acs.orglett.2c03576] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Herein we report efficient catalytic hydrosilylations of nitroarenes to form the corresponding aromatic amines using a well-defined manganese(II)-NNO pincer complex with a low catalyst loading (1 mol %) under solvent-free conditions. This base-metal-catalyzed hydrosilylation is an easy and sustainable alternative to classical hydrogenation. A large variety of nitroarenes bearing various functionalities were selectively transformed into the corresponding aromatic amines in good yields. The potential utility of the present catalytic protocol was demonstrated by the preparation of commercial drug molecules.
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Affiliation(s)
- Rakesh R Behera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Surajit Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Rahul Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - A Ashis Kumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
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12
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Kim S, Kim J, Zhong H, Panetti GB, Chirik PJ. Catalytic N–H Bond Formation Promoted by a Ruthenium Hydride Complex Bearing a Redox-Active Pyrimidine-Imine Ligand. J Am Chem Soc 2022; 144:20661-20671. [DOI: 10.1021/jacs.2c07800] [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)
- Sangmin Kim
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Junho Kim
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Hongyu Zhong
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Grace B. Panetti
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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13
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Vielhaber T, Faust K, Bögl T, Schöfberger W, Topf C. A Triphos-Modified Tungsten Piano-Stool Complex for the Homogeneous (Conjugate) Hydrogenation of Ketones and Esters. J Catal 2022. [DOI: 10.1016/j.jcat.2022.11.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Zhou H, Fan R, Yang J, Sun X, Liu X, Wang XC. N, N-Diisopropylethylamine-Mediated Electrochemical Reduction of Azobenzenes in Dichloromethane. J Org Chem 2022; 87:14536-14543. [PMID: 36269896 DOI: 10.1021/acs.joc.2c01949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a cathodic reduction-dominated electrochemical approach for the hydrogenation of azobenzenes in dichloromethane. With cheap and readily available N,N-diisopropylethylamine as a catalytic mediator, the reaction proceeded smoothly in a simple undivided cell under constant-current electrolysis. A series of azobenzenes were successfully reduced to the corresponding hydrazobenzenes in moderate to high yields at room temperature. Preliminarily mechanistic studies indicate that solvent dichloromethane acts as a hydrogen source. The use of a common solvent as a hydrogen source, no need for stoichiometric mediators or metallic reductants, and mild conditions make this work a more straightforward and sustainable protocol for hydrogenation of azobenzenes.
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Affiliation(s)
- Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.,College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Rundong Fan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Ximei Sun
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Xiaojun Liu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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15
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Chugh V, Chatterjee B, Chang W, Cramer HH, Hindemith C, Randel H, Weyhermüller T, Farès C, Werlé C. An Adaptive Rhodium Catalyst to Control the Hydrogenation Network of Nitroarenes. Angew Chem Int Ed Engl 2022; 61:e202205515. [PMID: 35759682 PMCID: PMC9544374 DOI: 10.1002/anie.202205515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Indexed: 11/10/2022]
Abstract
An adaptive catalytic system that provides control over the nitroarene hydrogenation network to prepare a wide range of aniline and hydroxylamine derivatives is presented. This system takes advantage of a delicate interplay between a rhodium(III) center and a Lewis acidic borane introduced in the secondary coordination sphere of the metal. The high chemoselectivity of the catalyst in the presence of various potentially vulnerable functional groups and its readiness to be deployed at a preparative scale illustrate its practicality. Mechanistic studies and density functional theory (DFT) methods were used to shed light on the mode of functioning of the catalyst and elucidate the origin of adaptivity. The competition for interaction with boron between a solvent molecule and a substrate was found crucial for adaptivity. When operating in THF, the reduction network stops at the hydroxylamine platform, whereas the reaction can be directed to the aniline platform in toluene.
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Affiliation(s)
- Vishal Chugh
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
| | - Basujit Chatterjee
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
| | - Wei‐Chieh Chang
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
| | - Hanna H. Cramer
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
| | - Carsten Hindemith
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
| | - Helena Randel
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
| | - Thomas Weyhermüller
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
| | - Christophe Farès
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Christophe Werlé
- Max Planck Institute for Chemical Energy Conversion Stiftstr. 34–36 45470 Mülheim an der Ruhr Germany
- Ruhr University Bochum Universitätsstr. 150 44801 Bochum Germany
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16
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A Reusable FeCl3∙6H2O/Cationic 2,2′-Bipyridyl Catalytic System for Reduction of Nitroarenes in Water. Catalysts 2022. [DOI: 10.3390/catal12080924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The association of a commercially-available iron (III) chloride hexahydrate (FeCl3∙6H2O) with cationic 2,2′-bipyridyl in water was proven to be an operationally simple and reusable catalytic system for the highly-selective reduction of nitroarenes to anilines. This procedure was conducted under air using 1–2 mol% of catalyst in the presence of nitroarenes and 4 equiv of hydrazine monohydrate (H2NNH2∙H2O) in neat water at 100 °C for 12 h, and provided high to excellent yields of aniline derivatives. After separation of the aqueous catalytic system from the organic product, the residual aqueous solution could be applied for subsequent reuse, without any catalyst retreatment or regeneration, for several runs with only a slight decrease in activity, proving this process eco-friendly.
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17
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Michalke J, Faust K, Bögl T, Bartling S, Rockstroh N, Topf C. Mild and Efficient Heterogeneous Hydrogenation of Nitroarenes Facilitated by a Pyrolytically Activated Dinuclear Ni(II)-Ce(III) Diimine Complex. Int J Mol Sci 2022; 23:ijms23158742. [PMID: 35955876 PMCID: PMC9369285 DOI: 10.3390/ijms23158742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 12/04/2022] Open
Abstract
We communicate the assembly of a solid, Ce-promoted Ni-based composite that was applied as catalyst for the hydrogenation of nitroarenes to afford the corresponding organic amines. The catalytically active material described herein was obtained through pyrolysis of a SiO2-pellet-supported bimetallic Ni-Ce complex that was readily synthesized prior to use from a MeO-functionalized salen congener, Ni(OAc)2·4 H2O, and Ce(NO3)3·6 H2O. Rewardingly, the requisite ligand for the pertinent solution phase precursor was accessible upon straightforward and time-saving imine condensation of ortho-vanillin with 1,3-diamino-2,2′-dimethylpropane. The introduced catalytic protocol is operationally simple in that the whole reaction set-up is quickly put together on the bench without the need of cumbersome handling in a glovebox or related containment systems. Moreover, the advantageous geometry and compact-sized nature of the used pellets renders the catalyst separation and recycling exceptionally easy.
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Affiliation(s)
- Jessica Michalke
- Institute of Catalysis (INCA), Johannes Kepler University (JKU), Altenbergerstraße 69, 4040 Linz, Austria
- Institute of Inorganic Chemistry, Johannes Kepler University (JKU), Altenbergerstraße 69, 4040 Linz, Austria
| | - Kirill Faust
- Institute of Catalysis (INCA), Johannes Kepler University (JKU), Altenbergerstraße 69, 4040 Linz, Austria
| | - Thomas Bögl
- Department of Analytical Chemistry, Johannes Kepler University (JKU), Altenbergerstraße 69, 4040 Linz, Austria
| | - Stephan Bartling
- Leibniz Institute for Catalysis, University of Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Nils Rockstroh
- Leibniz Institute for Catalysis, University of Rostock (LIKAT Rostock), Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Christoph Topf
- Institute of Catalysis (INCA), Johannes Kepler University (JKU), Altenbergerstraße 69, 4040 Linz, Austria
- Correspondence:
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18
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Zhong Q, Gao H, Wang PL, Zhou C, Miao T, Li H. Electrochemical Site-Selective Alkylation of Azobenzenes with (Thio)Xanthenes. Molecules 2022; 27:molecules27154967. [PMID: 35956916 PMCID: PMC9370205 DOI: 10.3390/molecules27154967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 07/31/2022] [Accepted: 08/02/2022] [Indexed: 12/10/2022] Open
Abstract
Herein, we first report an electrochemical methodology for the site-selective alkylation of azobenzenes with (thio)xanthenes in the absence of any transition metal catalyst or external oxidant. A variety of groups are compatible with this electrochemical alkylation, which furnishes the products in moderate to good yields.
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Affiliation(s)
- Qiang Zhong
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Hui Gao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
| | - Pei-Long Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Information College, Huaibei Normal University, Huaibei 235000, China
- Correspondence: (P.-L.W.); (H.L.)
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Tao Miao
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
| | - Hongji Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China
- Correspondence: (P.-L.W.); (H.L.)
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19
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Chugh V, Chatterjee B, Chang WC, Cramer HH, Hindemith C, Randel H, Weyhermüller T, Farès C, Werlé C. An Adaptive Rhodium Catalyst to Control the Hydrogenation Network of Nitroarenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205515] [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)
- Vishal Chugh
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Basujit Chatterjee
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Wei-Chieh Chang
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Hanna H. Cramer
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Carsten Hindemith
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Helena Randel
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis GERMANY
| | - Thomas Weyhermüller
- Max-Planck-Institute for Chemical Energy Conversion: Max-Planck-Institut fur chemische Energiekonversion Anorganische Spektroskopie GERMANY
| | - Christophe Farès
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Nuclear Magnetic Resonance Spectroscopy GERMANY
| | - Christophe Werlé
- Max-Planck-Institut fur chemische Energiekonversion Synergistic Organometallic Catalysis Stiftstrasse 34 - 36 D - 45470 Mülheim an der Ruhr GERMANY
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20
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Namdeo PK, Sheokand S, Kote BS, Radhakrishna L, Kunchur HS, Saini P, Ramakrishnan S, Balakrishna MS. Ru II complexes of 1,2,3-triazole appended tertiary phosphines, [P(Ph){( o-C 6H 4)(1,2,3-N 3C(Ph)CH} 2] and [P(Ph){ o-C 6H 4(CCH)-(1,2,3-N 3-Ph)} 2]: highly active catalysts for transfer hydrogenation of carbonyl/nitro compounds and for α-alkylation of ketones. Dalton Trans 2022; 51:6795-6808. [PMID: 35420618 DOI: 10.1039/d2dt00361a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The synthesis of two new 1,2,3-triazole appended monophosphines [P(Ph){(o-C6H4)(1,2,3-N3C(Ph)CH}2] (1) and [P(Ph){o-C6H4(CCH)(1,2,3-N3-Ph)}2] (2) and their RuII complexes is described. The reactions of 1 and 2 with [Ru(PPh3)3Cl2] in a 1 : 1 molar ratio produced cationic complexes 3 and 4, respectively. Both the complexes showed very high catalytic activity towards transfer hydrogenation, nitro reduction, and α-alkylation reactions and afforded the corresponding products in good to excellent yields. The free energy of β-hydride elimination from the respective Ru-alkoxide intermediates, a key mechanistic step common to all the three catalytic pathways, was calculated to be close to ergoneutral by density functional theory-based calculations, which is posited to rationalize the catalytic activity of 3. The reduction of aromatic nitro compounds was found to be highly chemoselective and produced the corresponding amines as major products even in the presence of a carbonyl group. The triazolyl-N2 coordinated RuII-NPN complex 3 showed better catalytic activity compared to the triazolyl-N3 coordinated complex 4.
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Affiliation(s)
- Pavan K Namdeo
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Sonu Sheokand
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Basvaraj S Kote
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Latchupatula Radhakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Harish S Kunchur
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Prateek Saini
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Srinivasan Ramakrishnan
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - Maravanji S Balakrishna
- Phosphorus Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
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21
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Curley JB, Townsend TM, Bernskoetter WH, Hazari N, Mercado BQ. Iron, Cobalt, and Nickel Complexes Supported by a iPrPNPhP Pincer Ligand. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00646] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Julia B. Curley
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Tanya M. Townsend
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Wesley H. Bernskoetter
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Nilay Hazari
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Brandon Q. Mercado
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
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22
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Zubar V, Haedler AT, Schütte M, Hashmi ASK, Schaub T. Hydrogenative Depolymerization of Polyurethanes Catalyzed by a Manganese Pincer Complex. CHEMSUSCHEM 2022; 15:e202101606. [PMID: 34342135 DOI: 10.1002/cssc.202101606] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Chemical recycling, in particular hydrogenative depolymerization, offers a promising way to utilize plastic waste. This report covers the manganese-catalyzed hydrogenation of polyurethane materials to the corresponding monomeric units. The key to success is a Mn pincer complex as a potent hydrogenation catalyst in combination with elevated temperatures (up to 200 °C) and appropriate solvents to ensure sufficient solubility of the polymers. A wide range of polyurethane samples of varying polyol and isocyanate compositions, some of which feature significant amounts of urea functionalities, are depolymerized, releasing polyetherols and diaminotoluene (TDA) in yields of up to 89 % and 76 %, respectively.
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Affiliation(s)
- Viktoriia Zubar
- Catalysis Research Laboratory (CaRLa), University of Heidelberg, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
| | | | - Markus Schütte
- BASF Polyurethanes GmbH, Elastogranstr. 60, 49448, Lemfoerde, Germany
| | - A Stephen K Hashmi
- Catalysis Research Laboratory (CaRLa), University of Heidelberg, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Thomas Schaub
- Catalysis Research Laboratory (CaRLa), University of Heidelberg, Im Neuenheimer Feld 584, 69120, Heidelberg, Germany
- BASF SE, Carl-Bosch-Straße 38, 67056, Ludwigshafen, Germany
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23
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Ramalingam A, Samaraj E, Venkateshwaran S, Senthilkumar SM, Senadi GC. 1T-MoS 2 catalysed reduction of nitroarenes and a one-pot synthesis of imines. NEW J CHEM 2022. [DOI: 10.1039/d2nj00732k] [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
An expedient synthesis of aromatic amines and imines via the reduction of nitroaromatics using 1T-MoS2 as a heterogeneous catalyst.
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Affiliation(s)
- Ariprasanth Ramalingam
- Department of Chemistry, SRM Institute of science and technology, Kattankulathur, Chennai, 603203, India
| | - Elavarasan Samaraj
- Department of Chemistry, SRM Institute of science and technology, Kattankulathur, Chennai, 603203, India
| | - Selvaraj Venkateshwaran
- Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi 630003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sakkarapalayam Murugesan Senthilkumar
- Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute (CECRI), Karaikudi 630003, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Gopal Chandru Senadi
- Department of Chemistry, SRM Institute of science and technology, Kattankulathur, Chennai, 603203, India
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24
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Curley JB, Hert C, Bernskoetter WH, Hazari N, Mercado BQ. Control of Catalyst Isomers Using an N-Phenyl-Substituted RN(CH 2CH 2P iPr 2) 2 Pincer Ligand in CO 2 Hydrogenation and Formic Acid Dehydrogenation. Inorg Chem 2021; 61:643-656. [PMID: 34955015 DOI: 10.1021/acs.inorgchem.1c03372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel pincer ligand, iPrPNPhP [PhN(CH2CH2PiPr2)2], which is an analogue of the versatile MACHO ligand, iPrPNHP [HN(CH2CH2PiPr2)2], was synthesized and characterized. The ligand was coordinated to ruthenium, and a series of hydride-containing complexes were isolated and characterized by NMR and IR spectroscopies, as well as X-ray diffraction. Comparisons to previously published analogues ligated by iPrPNHP and iPrPNMeP [CH3N(CH2CH2PiPr2)2] illustrate that there are large changes in the coordination chemistry that occur when the nitrogen substituent of the pincer ligand is altered. For example, ruthenium hydrides supported by the iPrPNPhP ligand always form the syn isomer (where syn/anti refer to the relative orientation of the group on nitrogen and the hydride ligand on ruthenium), whereas complexes supported by iPrPNHP form the anti isomer and complexes supported by iPrPNMeP form a mixture of syn and anti isomers. We evaluated the impact of the nitrogen substituent of the pincer ligand in catalysis by comparing a series of iPrPNRP (R = H, Me, Ph)-ligated ruthenium hydride complexes as catalysts for formic acid dehydrogenation and carbon dioxide (CO2) hydrogenation to formate. The iPrPNPhP-ligated species is the most active for formic acid dehydrogenation, and mechanistic studies suggest that this is likely because there are kinetic advantages for catalysts that operate via the syn isomer. In CO2 hydrogenation, the iPrPNPhP-ligated species is again the most active under our optimal conditions, and we report some of the highest turnover frequencies for homogeneous catalysts. Experimental and theoretical insights into the turnover-limiting step of catalysis provide a basis for the observed trends in catalytic activity. Additionally, the stability of our complexes enabled us to detect a previously unobserved autocatalytic effect involving the base that is added to drive the reaction. Overall, by modifying the nitrogen substituent on the MACHO ligand, we have developed highly active catalysts for formic acid dehydrogenation and CO2 hydrogenation and also provided a framework for future catalyst development.
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Affiliation(s)
- Julia B Curley
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Clayton Hert
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Wesley H Bernskoetter
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Nilay Hazari
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Brandon Q Mercado
- The Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
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25
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Generation of Cobalt-Containing Nanoparticles on Carbon via Pyrolysis of a Cobalt Corrole and Its Application in the Hydrogenation of Nitroarenes. Catalysts 2021. [DOI: 10.3390/catal12010011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report on the manufacture of a state-of-the-art heterogeneous non-noble metal catalyst, which is based on a molecularly well-defined phosphine-tagged cobalt corrole complex. This precursor compound is readily synthesized from convenient starting materials while the active material is obtained through wet-impregnation of the pertinent metalliferous macrocycle onto carbon black followed by controlled pyrolysis of the loaded carrier material under an inert gas atmosphere. Thus, the obtained composite was then applied in the heterogeneous hydrogenation of various nitroarenes to yield a vast array of valuable aniline derivatives that were conveniently isolated as their hydrochloride salts. The introduced catalytic protocol is robust and user-friendly with the entire assembly of the reaction set-up enabling the conduction of the experiments on the laboratory bench without any protection from air.
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26
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Gudun KA, Zakarina R, Segizbayev M, Hayrapetyan D, Slamova A, Khalimon AY. Cobalt‐Catalyzed Deoxygenative Hydroboration of Nitro Compounds and Applications to One‐Pot Synthesis of Aldimines and Amides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kristina A. Gudun
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Raikhan Zakarina
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Medet Segizbayev
- Department of Chemistry Brock University 1812 Sir Isaac Brock Way St. Catharines Niagara Region L2S 3A1 ON Canada
| | - Davit Hayrapetyan
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Ainur Slamova
- Core Facilities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
| | - Andrey Y. Khalimon
- Department of Chemistry School of Sciences and Humanities Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
- The Environment and Resource Efficiency Cluster (EREC) Nazarbayev University 53 Kabanbay Batyr Avenue Nur-Sultan 010000 Kazakhstan
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27
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Kabi AK, Gujjarappa R, Roy A, Sahoo A, Musib D, Vodnala N, Singh V, Malakar CC. Transition-Metal-Free Transfer Hydrogenative Cascade Reaction of Nitroarenes with Amines/Alcohols: Redox-Economical Access to Benzimidazoles. J Org Chem 2021; 86:14597-14607. [PMID: 34662119 DOI: 10.1021/acs.joc.1c01450] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This report describes an efficient transition-metal-free process toward the transfer hydrogenative cascade reaction between nitroarenes and amines or alcohols. The developed redox-economical approach was realized using a combination of KOtBu and Et3SiH as reagents, which allows the synthesis of benzimidazole derivatives via σ-bond metathesis. The reaction conditions hold well over a wide range of substrates embedded with diverse functional groups to deliver the desired products in good to excellent yields. The mechanistic proposal has been depicted on the basis of a series of control experiments, mass spectroscopic evidence which is well supported by density functional theory (DFT) calculations with a feasible energy profile.
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Affiliation(s)
- Arup K Kabi
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Raghuram Gujjarappa
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Anupam Roy
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Abhishek Sahoo
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Dulal Musib
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
| | - Nagaraju Vodnala
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India.,Department of Chemistry, Indian Institute of Technology Delhi, Multi-Storey Building, HauzKhas, New Delhi, 110016 India
| | - Virender Singh
- Department of Chemistry, Central University of Punjab, Bathinda, 151401 Punjab, India
| | - Chandi C Malakar
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal - 795004, Manipur, India
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28
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Yao W, Wang J, Lou Y, Wu H, Qi X, Yang J, Zhong A. Chemoselective hydroborative reduction of nitro motifs using a transition-metal-free catalyst. Org Chem Front 2021. [DOI: 10.1039/d1qo00705j] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The first transition-metal-free catalysts for deoxygenative reduction of nitroarenes, nitro heteroarenes and even notoriously challenging nitroalkanes using pinacolborane have been reported.
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Affiliation(s)
- Wubing Yao
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
- Department of Chemistry
| | - Jiali Wang
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
- Department of Chemistry
| | - Yinpeng Lou
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
| | - Haijian Wu
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
| | - Xinxin Qi
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P.R. China
| | - Jianguo Yang
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
- Department of Chemistry
| | - Aiguo Zhong
- School of Pharmaceutical and Materials Engineering
- Taizhou University
- Jiaojiang 318000
- P.R. China
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