1
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Bai M, Zhang S, Lin Z, Hao Z, Han Z, Lu GL, Lin J. Ruthenium Complexes with NNN-Pincer Ligands for N-Methylation of Amines Using Methanol. Inorg Chem 2024. [PMID: 38848310 DOI: 10.1021/acs.inorgchem.4c01561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
A series of ruthenium complexes (Ru1-Ru4) bearing new NNN-pincer ligands were synthesized in 58-78% yields. All of the complexes are air and moisture stable and were characterized by IR, NMR, and high-resolution mass spectra (HRMS). In addition, the structures of Ru1-Ru3 were confirmed by X-ray crystallographic analysis. These Ru(II) complexes exhibited high catalytic efficiency and broad functional group tolerance in the N-methylation reaction of amines using CH3OH as both the C1 source and solvent. Experimental results indicated that the electronic effect of the substituents on the ligands considerably affects the catalytic reactivity of the complexes in which Ru3 bearing an electron-donating OMe group showed the highest activity. Deuterium labeling and control experiments suggested that the dehydrogenation of methanol to generate ruthenium hydride species was the rate-determining step in the reaction. Furthermore, this protocol also provided a ready approach to versatile trideuterated N-methylamines under mild conditions using CD3OD as a deuterated methylating agent.
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Affiliation(s)
- Mengxuan Bai
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Shengxin Zhang
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Zhengguo Lin
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Zhiqiang Hao
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Zhangang Han
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Guo-Liang Lu
- Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, Private Bag 92019,Auckland 1142, New Zealand
- Maurice Wilkins Centre, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Jin Lin
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, China
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2
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Saha R, Panda S, Nanda A, Bagh B. Nickel-Catalyzed α-Alkylation of Arylacetonitriles with Challenging Secondary Alcohols. J Org Chem 2024; 89:6664-6676. [PMID: 36595479 DOI: 10.1021/acs.joc.2c02026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Nickel(II) complex 1 was utilized as a sustainable catalyst for α-alkylation of arylacetonitriles with challenging secondary alcohols. Arylacetonitriles with a wide range of functional groups were tolerated, and various cyclic and acyclic secondary alcohols were utilized to yield a large number of α-alkylated products. The plausible mechanism involves the base-promoted activation of precatalyst 1 to an active catalyst 2 (dehydrochlorinated product) which activates the O-H and C-H bonds of the secondary alcohol in a dehydrogenative pathway.
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Affiliation(s)
- Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, 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, Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Amareshwar Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, 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, Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
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3
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Bera S, Kabadwal LM, Banerjee D. Harnessing alcohols as sustainable reagents for late-stage functionalisation: synthesis of drugs and bio-inspired compounds. Chem Soc Rev 2024; 53:4607-4647. [PMID: 38525675 DOI: 10.1039/d3cs00942d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Alcohol is ubiquitous with unparalleled structural diversity and thus has wide applications as a native functional group in organic synthesis. It is highly prevalent among biomolecules and offers promising opportunities for the development of chemical libraries. Over the last decade, alcohol has been extensively used as an environmentally friendly chemical for numerous organic transformations. In this review, we collectively discuss the utilisation of alcohol from 2015 to 2023 in various organic transformations and their application toward intermediates of drugs, drug derivatives and natural product-like molecules. Notable features discussed are as follows: (i) sustainable approaches for C-X alkylation (X = C, N, or O) including O-phosphorylation of alcohols, (ii) newer strategies using methanol as a methylating reagent, (iii) allylation of alkenes and alkynes including allylic trifluoromethylations, (iv) alkenylation of N-heterocycles, ketones, sulfones, and ylides towards the synthesis of drug-like molecules, (v) cyclisation and annulation to pharmaceutically active molecules, and (vi) coupling of alcohols with aryl halides or triflates, aryl cyanide and olefins to access drug-like molecules. We summarise the synthesis of over 100 drugs via several approaches, where alcohol was used as one of the potential coupling partners. Additionally, a library of molecules consisting over 60 fatty acids or steroid motifs is documented for late-stage functionalisation including the challenges and opportunities for harnessing alcohols as renewable resources.
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Affiliation(s)
- Sourajit Bera
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Lalit Mohan Kabadwal
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Debasis Banerjee
- Department of Chemistry, Laboratory of Catalysis and Organic Synthesis, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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4
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Tang Q, Song D, Zhang K, Mao W, Zhao X, Du D, Ling F, Zhong W. Development of an imidazole-based N, N-bidentate ligand for the manganese catalyzed direct coupling of nitriles with alcohols. RSC Adv 2024; 14:12978-12982. [PMID: 38655477 PMCID: PMC11033977 DOI: 10.1039/d4ra00817k] [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: 02/01/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024] Open
Abstract
3d-Metal catalyzed borrowing hydrogen (BH) reactions represent powerful and environmentally friendly approaches for the direct coupling of alcohols with nitriles to assemble various important branched nitriles. The development of simple and efficient ligands is a crucial issue in this field. In this study, we designed a series of readily available N,N-bidentate ligands that demonstrated good efficiency in the Mn-catalyzed BH reaction of alcohols and nitrile derivatives, yielding the targeted nitriles in moderate to good yields. Remarkably, the mildness and practicality of this protocol were further demonstrated by the successful synthesis of anipamil via a two-cascade borrowing hydrogen procedure.
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Affiliation(s)
- Qian Tang
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University Nan Jing 210009 P. R. China
- Zhejiang Center for Drug &Cosmetic Evaluation Hangzhou 310012 P. R. China
| | - Dingguo Song
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Kali Zhang
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Wenhao Mao
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Xianghua Zhao
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Ding Du
- Department of Chemistry, State Key Laboratory of Natural Medicines, China Pharmaceutical University Nan Jing 210009 P. R. China
| | - Fei Ling
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Weihui Zhong
- College of Pharmaceutical Sciences, Zhejiang University of Technology Hangzhou 310014 P. R. China
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5
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Das A, Mandal R, Ravi Sankar HS, Kumaran S, Premkumar JR, Borah D, Sundararaju B. Reversal of Regioselectivity in Asymmetric C-H Bond Annulation with Bromoalkynes under Cobalt Catalysis. Angew Chem Int Ed Engl 2024; 63:e202315005. [PMID: 38095350 DOI: 10.1002/anie.202315005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Indexed: 12/30/2023]
Abstract
Metal-catalyzed asymmetric C-H bond annulation strategy offers a versatile platform, allowing the construction of complex P-chiral molecules through atom- and step-economical fashion. However, regioselective insertion of π-coupling partner between M-C bond with high enantio-induction remain elusive. Using commercially available Co(II) salt and chiral-Salox ligands, we demonstrate an unusual protocol for the regio-reversal, enantioselective C-H bond annulation of phosphinamide with bromoalkyne through desymmetrization. The reaction proceeds through ligand-assisted enantiodetermining cyclocobaltation followed by regioselective insertion of bromoalkyne between Co-C, subsequent reductive elimination, and halogen exchange with carboxylate resulted in P-stereogenic compounds in excellent ee (up to >99 %). The isolation of cobaltacycle involved in the catalytic cycle and the outcome of control experiments provide support for a plausible mechanism.
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Affiliation(s)
- Abir Das
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - Rajib Mandal
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | | | - Subramani Kumaran
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - J Richard Premkumar
- PG & Research Department of Chemistry, Bishop Heber College, 620017, Tiruchirappalli, Tamil Nadu, India
| | - Dipanti Borah
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, 400076, Mumbai, Maharashtra, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
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6
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Dahiya P, Garg N, Poli R, Sundararaju B. Hydrogenation and dehydrogenation of N-heterocycles under Cp*Co(III)-catalysis. Dalton Trans 2023; 52:14752-14756. [PMID: 37814805 DOI: 10.1039/d3dt03161f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
To realize the goal of a carbon-free energy economy, it is crucial to discover reactions that utilize sustainable resources as alternatives to fossil feedstocks. In this study, a well-defined, air-stable Cp*Co(III)-catalyst for transfer hydrogenation of quinoline derivatives and oxidative dehydrogenation of cyclic amines in water is developed. While the former reaction is promoted by formic acid as a transfer hydrogenation reagent, the latter is mediated by molecular oxygen as the sole oxidant. These processes provide new avenues for the investigation of air-stable cobalt catalysts for environmentally benign hydrogenation and dehydrogenation reactions.
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Affiliation(s)
- Pardeep Dahiya
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Nidhi Garg
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, F-31077, Toulouse Cedex 4, France
- Institut Universitaire de France, 1, rue Descartes, 75231 Paris Cedex 05, France
| | - Basker Sundararaju
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
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7
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De S, Ranjan P, Chaurasia V, Pal S, Pal S, Pandey P, Bera JK. Synchronous Proton-Hydride Transfer by a Pyrazole-Functionalized Protic Mn(I) Complex in Catalytic Alcohol Dehydrogenative Coupling. Chemistry 2023; 29:e202301758. [PMID: 37490592 DOI: 10.1002/chem.202301758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/23/2023] [Accepted: 07/25/2023] [Indexed: 07/27/2023]
Abstract
A series of Mn(I) complexes Mn(L1 )(CO)3 Br, Mn(L2 )(CO)3 Br, Mn(L1 )(CO)3 (OAc) and Mn(L3 )(CO)3 Br [L1 =2-(5-tert-butyl-1H-pyrazol-3-yl)-1,8-naphthyridine, L2 =2-(5-tert-butyl-1H-pyrazol-3-yl)pyridine, L3 =2-(5-tert-butyl-1-methyl-1H-pyrazol-3-yl)-1,8-naphthyridine] were synthesized and fully characterized. The acid-base equilibrium between the pyrazole and the pyrazolato forms of Mn(L1 )(CO)3 Br was studied by 1 H NMR and UV-vis spectra. These complexes are screened as catalysts for acceptorless dehydrogenative coupling (ADC) of primary alcohols and aromatic diamines for the synthesis of benzimidazole and quinoline derivatives with the release of H2 and H2 O as byproducts. The protic complex Mn(L1 )(CO)3 Br shows the highest catalytic activity for the synthesis of 2-substituted benzimidazole derivatives with broad substrate scope, whereas a related complex [Mn(L3 )(CO)3 Br], which is devoid of the proton responsive β-NH unit, shows significantly reduced catalytic efficiency validating the crucial role of the β-NH functionality for the alcohol dehydrogenation reactions. Control experiments, kinetic and deuterated studies, and density functional theory (DFT) calculations reveal a synchronous hydride-proton transfer by the metal-ligand construct in the alcohol dehydrogenation step.
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Affiliation(s)
- Subhabrata De
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prabodh Ranjan
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Vishal Chaurasia
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sourav Pal
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Saikat Pal
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Pragati Pandey
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra K Bera
- Department of Chemistry and, Center for Environmental Sciences and Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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8
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Izquierdo-Aranda L, Adam R, Cabrero-Antonino JR. Silver Supported Nanoparticles on [Mg 4 Al-LDH] as an Efficient Catalyst for the α-Alkylation of Nitriles, Oxindoles and Other Carboxylic Acid Derivatives with Alcohols. CHEMSUSCHEM 2023:e202300818. [PMID: 37486295 DOI: 10.1002/cssc.202300818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/24/2023] [Accepted: 07/24/2023] [Indexed: 07/25/2023]
Abstract
An efficient heterogeneous silver-catalyzed α-alkylation of nitriles and oxindoles using alcohols via borrowing hydrogen strategy has been developed for the first time. The active nanostructured material, namely [Ag/Mg4 Al-LDH], composed by silver nanoparticles (3-4 nm average particle size) homogeneously stabilized onto a [Mg4 Al-LDH] support with suitable Brønsted basic properties, constitutes a stable catalyst for the sustainable building of novel C-C bonds from alcohols and C-nucleophiles. By applying this catalyst, a broad range of α-functionalized nitriles and oxindoles has been accessed with good to excellent isolated yields and without the addition of external bases. Moreover, the novel silver nanocatalyst has also demonstrated its successful application to the cyclization of N-[2-(hydroxymethyl)phenyl]-2-phenylacetamides to afford 3-arylquinolin-2(1H)-ones, through a one-pot dehydrogenation and intramolecular α-alkylation. Control experiments, kinetic studies, and characterization data of a variety of [Ag/LDH]-type materials confirmed the silver role in the dehydrogenation and hydrogenation steps, while [Mg4 Al-LDH] matrix is able to catalyze condensation. Interestingly, these studies suggest as key point for the successful activity of [Ag/Mg4 Al-LDH], in comparison with other [Ag/LDH]-type nanocatalysts, the suitable acid-base properties of this material.
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Affiliation(s)
- Luis Izquierdo-Aranda
- Instituto de Tecnología Química, Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, València, Spain
| | - Rosa Adam
- Instituto de Tecnología Química, Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, València, Spain
- Departament de Química Orgànica, Facultat de Farmàcia, Universitat de València, Av. Vicent Andrés Estellés s/n, 46100, Burjassot, València, Spain
| | - Jose R Cabrero-Antonino
- Instituto de Tecnología Química, Universitat Politécnica de València-Consejo Superior Investigaciones Científicas (UPV-CSIC), Avda. de los Naranjos s/n, 46022, València, Spain
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9
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Bera A, Ghosh A, Banerjee D. Nickel-Catalyzed Alkylation of Oxindoles with Secondary Alcohols. J Org Chem 2023. [PMID: 37161856 DOI: 10.1021/acs.joc.3c00402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Herein, we have demonstrated a simple nickel-catalyzed C-3-selective alkylation of 2-oxindoles using a wide variety of secondary alkyl alcohols. As a special highlight, functionalization of the cholesterol derivative was reported. Control experiments, initial mechanistic studies, and deuterium-labeling experiments were performed for the alkylation process.
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Affiliation(s)
- Atanu Bera
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Adrija Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Debasis Banerjee
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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10
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Saini P, Dolui P, Nair A, Verma A, Elias AJ. A Bench-stable 8-Aminoquinoline Derived Phosphine-free Manganese (I)-Catalyst for Environmentally Benign C(α)-Alkylation of Oxindoles with Secondary and Primary Alcohols. Chem Asian J 2023; 18:e202201148. [PMID: 36688923 DOI: 10.1002/asia.202201148] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/11/2023] [Accepted: 01/23/2023] [Indexed: 01/24/2023]
Abstract
Herein, we report a new air-stable phosphine-free 8-AQ (8-aminoquinoline) based Mn(I) carbonyl complex as the catalyst for the C(α)-alkylation of oxindoles with alcohols. The Mn complex [(8-AQ)Mn(CO)3 Br] works effectively as a catalyst for the α-alkylation of oxindoles by both secondary as well as primary alcohols. The procedure has been used for the synthesis of pharmaceutically important recently developed oxindoles such as 3-(4-methoxybenzyl)indolin-2-one, 3-(4-(dimethylamino)benzyl)indolin-2-one, 3-(4-(dimethylamino)phenyl)-5-fluoroindolin-2-one and 3-(benzo[d][1,3]dioxol-5-ylmethyl)indolin-2-one, which are found to be effective in preventing specific types of cell death in neurodegenerative disorders. Control experiments have been carried out to investigate the reaction mechanism and the crucial role of metal-ligand cooperation via -NH2 moiety during catalysis.
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Affiliation(s)
- Parul Saini
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Pritam Dolui
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Abhishek Nair
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Ashutosh Verma
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | - Anil J Elias
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
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11
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Chakraborty P, Pradhan S, Richard Premkumar J, Sundararaju B. Valorization of Terpenols Under Iron Catalysis. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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12
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Poli R. A new classification for the ever-expanding mechanistic landscape of catalyzed hydrogenations, dehydrogenations and transfer hydrogenations. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2023. [DOI: 10.1016/bs.adomc.2022.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
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13
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Jafarzadeh M, Sobhani SH, Gajewski K, Kianmehr E. Recent advances in C/ N-alkylation with alcohols through hydride transfer strategies. Org Biomol Chem 2022; 20:7713-7745. [PMID: 36169049 DOI: 10.1039/d2ob00706a] [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
This review highlights the most recent reports in three powerful and ever-growing fields of borrowing hydrogen, acceptorless dehydrogenative coupling, and base-mediated hydride transfer strategies; which pave the way for generating reactive intermediates via shuttling hydrogen (or hydride) between starting materials without any need for an external hydrogen source to easily construct more complex structures. There is a thorough focus on diversifying the utility of alcohols for C/N-alkylation leading to the synthesis of branched ketones, alcohols, amines, indols, and 6-membered nitrogen-containing heterocycles such as pyridines and pyrimidines, various transformations with the focus on C-C and C-N bond-forming reactions via metal-based catalysis or metal-free approaches in this context to give a global overview in this area.
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Affiliation(s)
- Mahdi Jafarzadeh
- School of Chemistry, College of Science, University of Tehran, Tehran 1417614411, Iran.
| | - Seyed Hasan Sobhani
- School of Chemistry, College of Science, University of Tehran, Tehran 1417614411, Iran.
| | | | - Ebrahim Kianmehr
- School of Chemistry, College of Science, University of Tehran, Tehran 1417614411, Iran.
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14
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Dai K, Chen Q, Xie W, Lu K, Yan Z, Peng M, Li C, Tu Y, Ding T. Facile Benzylic Alkylation of Arenes with Alcohols by Catalysis with Spirocyclic NHC Ir
III
Pincer Complex. Angew Chem Int Ed Engl 2022; 61:e202206446. [DOI: 10.1002/anie.202206446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Kun‐Long Dai
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Qi‐Long Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
| | - Wen‐Ping Xie
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Ka Lu
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
| | - Zhi‐Bo Yan
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
| | - Meng Peng
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
| | - Chang‐Kun Li
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
| | - Yong‐Qiang Tu
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 P. R. China
| | - Tong‐Mei Ding
- School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University Shanghai 200240 P. R. China
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15
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Garg N, Somasundharam HP, Dahiya P, Sundararaju B. Methanol as a hydrogen source: room-temperature highly-selective transfer hydrogenation of α,β-unsaturated ketones. Chem Commun (Camb) 2022; 58:9930-9933. [PMID: 35979880 DOI: 10.1039/d2cc03597a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The described system offers an ideal, user-friendly protocol for the chemoselective homogeneous hydrogenation of α,β-unsaturated ketones at room temperature using methanol as a liquid organic hydrogen carrier. Excellent yields were achieved with an in situ-prepared phosphine-free Cp*Ir(III)/bipyridonate complex. Chemoselective reduction with other reducible functionalities and late-stage functionalization were also explored.
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Affiliation(s)
- Nidhi Garg
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
| | | | - Pardeep Dahiya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
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16
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Emayavaramban B, Chakraborty P, Dahiya P, Sundararaju B. Iron-Catalyzed α-Methylation of Ketones Using Methanol as the C1 Source under Photoirradiation. Org Lett 2022; 24:6219-6223. [PMID: 35960264 DOI: 10.1021/acs.orglett.2c02545] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild, environmentally benign approach for α-methylation of ketones utilizing methanol as the C1 source under visible light has been developed. The reaction conditions were favorable for a wide range of ketones with both aromatic and aliphatic backbones, allowing for good-to-excellent yields of the respective products. The tentative mechanism is postulated after preliminary mechanistic and kinetic experiments.
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Affiliation(s)
| | - Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Pardeep Dahiya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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17
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Dai KL, Chen QL, Xie WP, Lu K, Yan ZB, Peng M, Li CK, Tu Y, Ding TM. Facile Benzylic Alkylation of Arenes with Alcohols by Catalysis with Spirocyclic NHC Ir(III) Pincer Complex. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kun-Long Dai
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering CHINA
| | - Qi-Long Chen
- Lanzhou University School of Chemistry and Chemical Engineering CHINA
| | - Wen-Ping Xie
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering CHINA
| | - Ka Lu
- Lanzhou University School of Chemistry and Chemical Engineering CHINA
| | - Zhi-Bo Yan
- Lanzhou University School of Chemistry and Chemical Engineering CHINA
| | - Meng Peng
- Lanzhou University School of Chemistry and Chemical Engineering CHINA
| | - Chang-Kun Li
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering CHINA
| | - Yongqiang Tu
- Lanzhou University Chemistry 222 Tianshui Road South 730000 Lanzhou CHINA
| | - Tong-Mei Ding
- Shanghai Jiao Tong University School of Chemistry and Chemical Engineering CHINA
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18
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Dahiya P, Sarkar A, Sundararaju B. Well‐defined [Cp*Co(N,O)I]‐Catalysts for Site‐selective Intramolecular C‐H Amidation. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Affiliation(s)
- Arpita Singh
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
- Chemistry & Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Michael Findlater
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
- Chemistry & Biochemistry, University of California Merced, Merced, California 95343, United States
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20
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Borthakur I, Sau A, Kundu S. Cobalt-catalyzed dehydrogenative functionalization of alcohols: Progress and future prospect. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214257] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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21
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Wang M, Gong H, Fu H, Zheng X, Chen H, Li R. Ruthenium Complex-Catalyzed Tandem Reactions of Alcohols with Acetonitriles for Synthesis of α-Substituted Amides. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202204039] [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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22
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Mandal R, Barsu N, Garai B, Das A, Perekalin D, Sundararaju B. Room-temperature C-H bond alkynylation by merging cobalt and photocatalysts. Chem Commun (Camb) 2021; 57:12167-12170. [PMID: 34726212 DOI: 10.1039/d1cc05263b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new protocol is developed for the mono- and bis-ortho-C-H alkynylation of easily accessible benzamide derivatives using alkynyl bromides at room temperature by merging cobalt and photocatalysts. The diverse reactivity of various alkynyl bromides towards the C-H alkynylation and competing C-H/N-H bond annulation reactions has been demonstrated to give the corresponding products in good yields with excellent functional group tolerance.
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Affiliation(s)
- Rajib Mandal
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Nagaraju Barsu
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Bholanath Garai
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Abir Das
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Dmitry Perekalin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., Moscow, Russia
| | - Basker Sundararaju
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
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23
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Bains AK, Kundu A, Maiti D, Adhikari D. Ligand-redox assisted nickel catalysis toward stereoselective synthesis of ( n+1)-membered cycloalkanes from 1, n-diols with methyl ketones. Chem Sci 2021; 12:14217-14223. [PMID: 34760207 PMCID: PMC8565367 DOI: 10.1039/d1sc04261k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 10/04/2021] [Indexed: 01/16/2023] Open
Abstract
A well-defined, bench-stable nickel catalyst is presented here, that can facilitate double alkylation of a methyl ketone to realize a wide variety of cycloalkanes. The performance of the catalyst depends on the ligand redox process comprising an azo-hydrazo couple. The source of the bis electrophile in this double alkylation is a 1,n-diol, so that (n+1)-membered cycloalkanes can be furnished in a stereoselective manner. The reaction follows a cascade of dehydrogenation/hydrogenation reactions and adopts a borrowing hydrogen (BH) method. A thorough mechanistic analysis including the interception of key radical intermediates and DFT calculations supports the ligand radical-mediated dehydrogenation and hydrogenation reactions, which is quite rare in BH chemistry. In particular, this radical-promoted hydrogenation is distinctly different from conventional hydrogenations involving a metal hydride and complementary to the ubiquitous two-electron driven dehydrogenation/hydrogenation reactions.
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Affiliation(s)
- Amreen K Bains
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
| | - Abhishek Kundu
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai Mumbai-400076 India
| | - Debashis Adhikari
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali SAS Nagar Punjab-140306 India
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24
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Bains AK, Biswas A, Adhikari D. Nickel‐Catalyzed Selective Synthesis of α‐Alkylated Ketones via Dehydrogenative Cross‐Coupling of Primary and Secondary Alcohols. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101077] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amreen K Bains
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER)-Mohali, SAS Nagar Punjab 140306 India
| | - Ayanangshu Biswas
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER)-Mohali, SAS Nagar Punjab 140306 India
| | - Debashis Adhikari
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER)-Mohali, SAS Nagar Punjab 140306 India
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25
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Switching between borrowing hydrogen and acceptorless dehydrogenative coupling by base transition-metal catalysts. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Chakraborty P, Sundararaju B, Manoury E, Poli R. New Borrowing Hydrogen Mechanism for Redox-Active Metals. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02616] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Institut Universitaire de France, 1, Rue Descartes, Paris Cedex 05 75231, France
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27
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Paudel K, Xu S, Ding K. Switchable Cobalt-Catalyzed α-Olefination and α-Alkylation of Nitriles with Primary Alcohols. Org Lett 2021; 23:5028-5032. [PMID: 34143638 DOI: 10.1021/acs.orglett.1c01553] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first switchable α-olefination and α-alkylation of nitriles with primary alcohols catalyzed by a well-defined base transition-metal Co complex was presented. A broad variety of nitriles and primary alcohols are selectively and efficiently converted to the corresponding products by this method. It is noteworthy that the transformation is environmentally benign and atom efficient with H2 and H2O being the sole byproducts.
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Affiliation(s)
- Keshav Paudel
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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28
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Fujita S, Imagawa K, Yamaguchi S, Yamasaki J, Yamazoe S, Mizugaki T, Mitsudome T. A nickel phosphide nanoalloy catalyst for the C-3 alkylation of oxindoles with alcohols. Sci Rep 2021; 11:10673. [PMID: 34021187 PMCID: PMC8140154 DOI: 10.1038/s41598-021-89561-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 04/26/2021] [Indexed: 11/23/2022] Open
Abstract
Although transition metal phosphides are well studied as electrocatalysts and hydrotreating catalysts, the application of metal phosphides in organic synthesis is rare, and cooperative catalysis between metal phosphides and supports remains unexplored. Herein, we report that a cerium dioxide-supported nickel phosphide nanoalloy (nano-Ni2P/CeO2) efficiently promoted the C-3 alkylation of oxindoles with alcohols without any additives through the borrowing hydrogen methodology. Oxindoles were alkylated with various alcohols to provide the corresponding C-3 alkylated oxindoles in high yields. This is the first catalytic system for the C-3 alkylation of oxindoles with alcohols using a non-precious metal-based heterogeneous catalyst. The catalytic activity of nano-Ni2P/CeO2 was comparable to that reported for precious metal-based catalysts. Moreover, nano-Ni2P/CeO2 was easily recoverable and reusable without any significant loss of activity. Control experiments revealed that the Ni2P nanoalloy and the CeO2 support functioned cooperatively, leading to a high catalytic performance.
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Affiliation(s)
- Shu Fujita
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Kohei Imagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Sho Yamaguchi
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Jun Yamasaki
- Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, 7-1, Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo, 192-0397, Japan
| | - Tomoo Mizugaki
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan.,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka, 565-0871, Japan
| | - Takato Mitsudome
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan.
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29
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Donthireddy SNR, Tiwari CS, Kumar S, Rit A. Atom‐Economic Alk(en)ylations of Esters, Amides, and Methyl Heteroarenes Utilizing Alcohols Following Dehydrogenative Strategies. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000634] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- S. N. R. Donthireddy
- Department of Chemistry Indian Institute of Technology Madras Chennai 600036 India
| | | | - Shashi Kumar
- Department of Chemistry Indian Institute of Technology Madras Chennai 600036 India
| | - Arnab Rit
- Department of Chemistry Indian Institute of Technology Madras Chennai 600036 India
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30
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Bhattacharyya D, Sarmah BK, Nandi S, Srivastava HK, Das A. Selective Catalytic Synthesis of α-Alkylated Ketones and β-Disubstituted Ketones via Acceptorless Dehydrogenative Cross-Coupling of Alcohols. Org Lett 2021; 23:869-875. [DOI: 10.1021/acs.orglett.0c04098] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dipanjan Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Sekhar Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Hemant Kumar Srivastava
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research Guwahati, Guwahati 781101, Assam, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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31
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Li C, Bai L, Ge MT, Xia AB, Wang Y, Qiu YR, Xu DQ. Base-controlled chemoselectivity: direct coupling of alcohols and acetonitriles to synthesise α-alkylated arylacetonitriles or acetamides. NEW J CHEM 2021. [DOI: 10.1039/d1nj02243a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Cp*IrCl2]2 with a phosphine-free ligand α,α,α-terpyridine shows high catalytic performance in chemodivergent synthesis of α-alkylated arylacetonitriles in the presence of K2CO3 and α-alkylated acetamides in the presence of tBuOK, respectively.
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Affiliation(s)
- Chen Li
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Liang Bai
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Min-Tong Ge
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ai-Bao Xia
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ying Wang
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yuan-Rui Qiu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dan-Qian Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, China
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32
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Dahiya P, Gangwar MK, Sundararaju B. Well‐defined Cp*Co(III)‐catalyzed Hydrogenation of Carbonates and Polycarbonates. ChemCatChem 2020. [DOI: 10.1002/cctc.202001490] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pardeep Dahiya
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
| | - Manoj Kumar Gangwar
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
| | - Basker Sundararaju
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
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33
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Paudel K, Xu S, Ding K. α-Alkylation of Nitriles with Primary Alcohols by a Well-Defined Molecular Cobalt Catalyst. J Org Chem 2020; 85:14980-14988. [PMID: 33136400 DOI: 10.1021/acs.joc.0c01822] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The α-alkylation of nitriles with primary alcohols to selectively synthesize nitriles by a well-defined molecular homogeneous cobalt catalyst is presented. Thirty-two examples with up to 95% yield are reported. Remarkably, this transformation is environmentally friendly and atom economical with water as the only byproduct.
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Affiliation(s)
- Keshav Paudel
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Shi Xu
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
| | - Keying Ding
- Department of Chemistry, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States.,Molecular Biosciences Program, Middle Tennessee State University, Murfreesboro, Tennessee 37132, United States
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34
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Panda S, Saha R, Sethi S, Ghosh R, Bagh B. Efficient α-Alkylation of Arylacetonitriles with Secondary Alcohols Catalyzed by a Phosphine-Free Air-Stable Iridium(III) Complex. J Org Chem 2020; 85:15610-15621. [PMID: 33197191 DOI: 10.1021/acs.joc.0c02400] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A well-defined and readily available air-stable dimeric iridium(III) complex catalyzed α-alkylation of arylacetonitriles using secondary alcohols with the liberation of water as the only byproduct is reported. The α-alkylations were efficiently performed at 120 °C under solvent-free conditions with very low (0.1-0.01 mol %) catalyst loading. Various secondary alcohols including cyclic and acyclic alcohols and a wide variety of arylacetonitriles bearing different functional groups were converted into the corresponding α-alkylated products in good yields. Mechanistic study revealed that the reaction proceeds via alcohol activation by metal-ligand cooperation with the formation of reactive iridium-hydride species.
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Affiliation(s)
- Surajit Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
| | - Subrat Sethi
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, 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), HBNI, 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), HBNI, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Bhubaneswar, Odisha 752050, India
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