1
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Kamaraj K, H Dixneuf P, Sundaram GB, Reek JNH, Beromeo Bheeter C. Pd/C-Catalyzed Selective N-Monomethylation by Transfer Hydrogenation of Urea Derivatives using Methanol as H 2 and C1 Sources. Chemistry 2024; 30:e202402414. [PMID: 39205531 DOI: 10.1002/chem.202402414] [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: 06/24/2024] [Revised: 08/28/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
N-monomethyl amines are useful intermediates in drugs, natural products, paints. Yet their synthesis is a tremendous challenge due to their high reactivity, typically leading to overmethylation. In this contribution, a highly selective catalytic N-methylation methodology is reported, converting urea derivatives to monomethylated amines, using a commercially available heterogeneous Pd/C catalyst and methanol as unique reagent. Methanol provides a sustainable alternative protocol for the selective preparation of mono-methylated derivatives as it acts as both H2 and C1 sources. In addition, several control experiments were performed to provide a proposal for the mechanism, namely dehydrogenation of methanol and subsequent hydrogenation of urea derivatives, followed by reduction of the in situ formed methyl imine. Importantly, the approach is simple, highly productive and enables novel synthetic procedures for the preparation of monomethylamines from urea derivatives.
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Affiliation(s)
- Kiruthigadevi Kamaraj
- School of Advanced Sciences, Department of Chemistry, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
| | - Pierre H Dixneuf
- University of Rennes, ISCR, UMR CNRS 6226, F-35000, Rennes, France
| | - Ganesh Babu Sundaram
- School of Advanced Sciences, Department of Chemistry, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
| | - Joost N H Reek
- Homogeneous, Supramolecular and Bio-inspired Catalysis group, Van't Hoff, Institute for Molecular Science (HIMS), University of Amsterdam (UvA), Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Charles Beromeo Bheeter
- Amity Institute of Applied Sciences, Amity University, Uttar Pradesh, Noida, 201313, India
- School of Advanced Sciences, Department of Chemistry, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
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2
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Khan J, Taneja N, Yadav N, Hazra CK. Silane-mediated, facile C-H and N-H methylation using formaldehyde. Chem Commun (Camb) 2024; 60:11367-11370. [PMID: 39308363 DOI: 10.1039/d4cc03976a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2024]
Abstract
The use of (para)-formaldehyde for the methylation/alkylation of C(sp2)-H and N-H bonds, utilizing a combination of silane and hexafluoroisopropanol (HFIP) as activators, is reported. Overcoming the complexity of C(sp2)-H methylation on aryl and indole substrates, the process utilizes a Friedel-Crafts alkylation, followed by silane as a hydride donor, under a mild acidic medium. The method has been employed for the synthesis of the antifungal drug butenafine and a derivative of the non-steroidal anti-inflammatory drug (NSAID) flurbiprofen.
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Affiliation(s)
- Jabir Khan
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Neha Taneja
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Naveen Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Chinmoy Kumar Hazra
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
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3
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Templ J, Schnürch M. A Guide for Mono-Selective N-Methylation, N-Ethylation, and N-n-Propylation of Primary Amines, Amides, and Sulfonamides and Their Applicability in Late-Stage Modification. Chemistry 2024; 30:e202304205. [PMID: 38353032 DOI: 10.1002/chem.202304205] [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: 12/18/2023] [Indexed: 03/06/2024]
Abstract
This review provides a comprehensive overview of mono-alkylation methodologies targeting crucial nitrogen moieties - amines, amides, and sulfonamides - found in organic building blocks and pharmaceuticals. Emphasizing the intersection of chemical precision with drug discovery, the central challenge addressed is achieving one-pot mono-selective short-chain N-alkylations (methylations, ethylations, and n-propylations), preventing undesired overalkylation. Additionally, sustainable, safe, and benign alternatives to traditional alkylating agents, including alcohols, carbon dioxide, carboxylic acids, nitriles, alkyl phosphates, quaternary ammonium salts, and alkyl carbonates, are explored. This review, categorized by the nature of the alkylating agent, aids researchers in selecting suitable methods for mono-selective N-alkylation.
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Affiliation(s)
- Johanna Templ
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060, Vienna, Austria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, 1060, Vienna, Austria
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4
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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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5
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Ji J, Huo Y, Dai Z, Chen Z, Tu T. Manganese-Catalyzed Mono-N-Methylation of Aliphatic Primary Amines without the Requirement of External High-Hydrogen Pressure. Angew Chem Int Ed Engl 2024; 63:e202318763. [PMID: 38300154 DOI: 10.1002/anie.202318763] [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: 12/06/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/02/2024]
Abstract
The synthesis of mono-N-methylated aliphatic primary amines has traditionally been challenging, requiring noble metal catalysts and high-pressure H2 for achieving satisfactory yields and selectivity. Herein, we developed an approach for the selective coupling of methanol and aliphatic primary amines, without high-pressure hydrogen, using a manganese-based catalyst. Remarkably, up to 98 % yields with broad substrate scope were achieved at low catalyst loadings. Notably, due to the weak base-catalyzed alcoholysis of formamide intermediates, our novel protocol not only obviates the addition of high-pressure H2 but also prevents side secondary N-methylation, supported by control experiments and density functional theory calculations.
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Affiliation(s)
- Jiale Ji
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Yinghao Huo
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Zhaowen Dai
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
| | - Zhening Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao West Road, Fuzhou, 350002, China
| | - Tao Tu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai, 200032, China
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6
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Gao C, Li Y, Wang M, Gong D, Zhao L. Ru(II)-Catalyzed N-Methylation of Amines Using Methanol as the C1 Source. ACS OMEGA 2023; 8:36597-36603. [PMID: 37810663 PMCID: PMC10552110 DOI: 10.1021/acsomega.3c06260] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 09/08/2023] [Indexed: 10/10/2023]
Abstract
Four ruthenium complexes were used as catalysts for the N-methylation of amines using methanol as the C1 source under weak base conditions. The (DPEPhos)RuCl2PPh3(1a) catalyst showed the best catalytic performance (0.5 mol %, 12 h). The deuterium labeling and control experiments suggested the reaction via the Ru-H mechanism. This study provides a new ruthenium catalyst system for N-methylation with methanol under weak base conditions.
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Affiliation(s)
- Caiyu Gao
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Yufei Li
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Minghao Wang
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Dawei Gong
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
| | - Lina Zhao
- Key Laboratory
of Preparation
and Application of Environmental Friendly Materials, Ministry of Education,
College of Chemistry, Jilin Normal University, Changchun 130103, P. R. China
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7
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Brodie CN, Owen AE, Kolb JS, Bühl M, Kumar A. Synthesis of Polyethyleneimines from the Manganese-Catalysed Coupling of Ethylene Glycol and Ethylenediamine. Angew Chem Int Ed Engl 2023; 62:e202306655. [PMID: 37195140 PMCID: PMC11497229 DOI: 10.1002/anie.202306655] [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: 05/12/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 05/18/2023]
Abstract
Polyethyleneimines find many applications in products such as detergents, adhesives, cosmetics, and for processes such as tissue culture, gene therapy, and CO2 capture. The current state-of-the-art technology for the production of the branched polyethyleneimines involves aziridine feedstock which is a highly toxic, volatile and mutagenic chemical and raises significant concern to human health and environment. We report here a novel method for the synthesis of branched polyethyleneimine derivative from ethylene glycol and ethylenediamine which are much safer, environmentally benign, commercially available and potentially renewable feedstock. The polymerisation reaction is catalysed by a complex of an earth-abundant metal, manganese and liberates H2 O as the only by-product. Our mechanistic studies using a combination of DFT computation and experiment suggest that the reaction proceeds by the formation and subsequent hydrogenation of imine intermediates.
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Affiliation(s)
- Claire N. Brodie
- Department of ChemistryUniversity of St AndrewsNorth HaughKY16 9STSt AndrewsUK
| | - Aniekan E. Owen
- Department of ChemistryUniversity of St AndrewsNorth HaughKY16 9STSt AndrewsUK
| | - Julian S. Kolb
- Department of ChemistryUniversity of St AndrewsNorth HaughKY16 9STSt AndrewsUK
| | - Michael Bühl
- Department of ChemistryUniversity of St AndrewsNorth HaughKY16 9STSt AndrewsUK
| | - Amit Kumar
- Department of ChemistryUniversity of St AndrewsNorth HaughKY16 9STSt AndrewsUK
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8
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Guin AK, Pal S, Chakraborty S, Chakraborty S, Paul ND. N-Alkylation of Amines by C1-C10 Aliphatic Alcohols Using A Well-Defined Ru(II)-Catalyst. A Metal-Ligand Cooperative Approach. J Org Chem 2023; 88:5944-5961. [PMID: 37052217 DOI: 10.1021/acs.joc.3c00313] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
A Ru(II)-catalyzed efficient and selective N-alkylation of amines by C1-C10 aliphatic alcohols is reported. The catalyst [Ru(L1a)(PPh3)Cl2] (1a) bearing a tridentate redox-active azo-aromatic pincer, 2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline (L1a) is air-stable, easy to prepare, and showed wide functional group tolerance requiring only 1.0 mol % (for N-methylation and N-ethylation) and 0.1 mol % of catalyst loading for N-alkylation with C3-C10 alcohols. A wide array of N-methylated, N-ethylated, and N-alkylated amines were prepared in moderate to good yields via direct coupling of amines and alcohols. 1a efficiently catalyzes the N-alkylation of diamines selectively. It is even suitable for synthesizing N-alkylated diamines using (aliphatic) diols producing the tumor-active drug molecule MSX-122 in moderate yield. 1a showed excellent chemo-selectivity during the N-alkylation using oleyl alcohol and monoterpenoid β-citronellol. Control experiments and mechanistic investigations revealed that the 1a-catalyzed N-alkylation reactions proceed via a borrowing hydrogen transfer pathway where the hydrogen removed from the alcohol during the dehydrogenation step is stored in the ligand backbone of 1a, which in the subsequent steps transferred to the in situ formed imine intermediate to produce the N-alkylated amines.
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Affiliation(s)
- Amit Kumar Guin
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Subhasree Pal
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Subhajit Chakraborty
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Santana Chakraborty
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
| | - Nanda D Paul
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Botanic Garden, Howrah 711103, India
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9
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Wang X, Wang H, Zhao K, Yuan H, Shi F, Cui X. Active Pd Catalyst for the Selective Synthesis of Methylated Amines with Methanol. J Org Chem 2023; 88:5025-5035. [PMID: 36692494 DOI: 10.1021/acs.joc.2c02294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Selective N-methylation of amines with methanol is an important reaction in the synthesis of high-value-added fine chemicals, including dyes, surfactants, pharmaceuticals, agrochemicals, and materials. However, N-methylated amines possess higher reactivities and are prone to further transform into N,N-dimethylated amines. Therefore, it is still a challenge to controllably regulate the selectivity of N-methylation using heterogeneous catalysts without the use of base. Herein, we developed a series of Pd/Zn(Al)O catalysts with abundant basic sites, and the selectivity of N-methylation was controlled by a heterogeneous Pd/Zn(Al)O catalyst with a Zn/Al ratio of 10 and a Pd loading of 0.4 wt % in the pressure of H2. The experimental results showed that the appropriate basic properties of the catalyst were beneficial to form the desired N-methylated amine. The low loading of Pd in the catalyst was highly dispersed on the support, providing sufficient active sites. These were attributed to the Zn vacancies formed by Al-doped Zn, which were beneficial to form the highly active and stable Pd sites. Furthermore, a series of amines and nitrobenzenes with different functional groups were well tolerated for the selective synthesis of N-methylated amines in the absence of base.
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Affiliation(s)
- Xinzhi Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China.,University of Chinese Academy of Sciences, No. 19A, Yuquan Road, Beijing 100049, China
| | - Hongli Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China
| | - Kang Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China
| | - Hangkong Yuan
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China
| | - Feng Shi
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China
| | - Xinjiang Cui
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, Lanzhou, Gansu 730000, China
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10
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Long Y, He J, Zhang H, Chen Y, Liu K, Fu J, Li H, Zhu L, Lin Z, Stefancu A, Cortes E, Zhu M, Liu M. Highly Selective Monomethylation of Amines with CO 2 /H 2 via Ag/Al 2 O 3 as a Catalyst. Chemistry 2023; 29:e202203152. [PMID: 36626646 DOI: 10.1002/chem.202203152] [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: 10/10/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/12/2023]
Abstract
The selective synthesis of monomethylated amines with CO2 is particularly challenging because the formation of tertiary amines is thermodynamically more favorable. Herein, a new strategy for the controllable synthesis of N-monomethylated amines from primary amines and CO2 /H2 is explored. First-principle calculations reveal that the dissociation of H2 via an heterolytic route reduces the reactivity of methylated amines and thus inhibit successive methylation. In situ DRIFTS proves the process of formation and decomposition of ammonium salt by secondary amine reversible binding with H+ on the Ag/Al2 O3 catalyst, thereby reducing its reactivity. Meanwhile, the energy barrier for the rate-determining step of monomethylation was much lower than that of overmethylation (0.34 eV vs. 0.58 eV) means amines monomethylation in preference to successive methylation. Under optimal reaction conditions, a variety of amines were converted to the corresponding monomethylated amines in good to excellent yields, and more than 90 % yield of product was obtained.
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Affiliation(s)
- Yan Long
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, 511443, Guangzhou, P. R. China
| | - Jie He
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, 511443, Guangzhou, P. R. China
| | - Hang Zhang
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
| | - Yingkang Chen
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
| | - Kang Liu
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
| | - Junwei Fu
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
| | - Hongmei Li
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China.,School of Materials Science and Engineering, Zhengzhou University, 450002, Zhengzhou, P. R. China
| | - Li Zhu
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
| | - Zhang Lin
- Chinese National Engineering Research Centre for Control &, Treatment of Heavy Metal Pollution, School of Metallurgy and Environment, Central South University, 410083, Changsha, China
| | - Andrei Stefancu
- Nanoinstitut München, Fakultät für Physik, Ludwig-Maximilians-Universität München, 80539, München, Germany
| | - Emiliano Cortes
- Nanoinstitut München, Fakultät für Physik, Ludwig-Maximilians-Universität München, 80539, München, Germany
| | - Mingshan Zhu
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, 511443, Guangzhou, P. R. China
| | - Min Liu
- Hunan Joint International Research Center for Carbon Dioxide Resource Utilization, State Key Laboratory of Powder Metallurgy, School of Physical and Electronics, Central South University, 410083, Changsha, P. R. China
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11
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Recent advances in the catalytic N-methylation and N-trideuteromethylation reactions using methanol and deuterated methanol. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Chen L, Zhou X, Chen Z, Wang C, Wang S, Teng H. A versatile way for the synthesis of monomethylamines by reduction of N-substituted carbonylimidazoles with the NaBH 4/I 2 system. Beilstein J Org Chem 2022; 18:1032-1039. [PMID: 36105729 PMCID: PMC9443423 DOI: 10.3762/bjoc.18.104] [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: 05/29/2022] [Accepted: 08/05/2022] [Indexed: 11/23/2022] Open
Abstract
An economical and versatile protocol for the one-pot synthesis of monomethylamines by reduction of N-substituted carbonylimidazoles with NaBH4/I2 in THF at reflux temperature is described. This method used no special catalyst and various monomethylamines can be easily obtained in moderate to good yields from a wide range of raw materials including amines (primary amines and secondary amines), carboxylic acids and isocyanates. Besides, an interesting reduction selectivity was observed. Exploration of the reaction process shows that it undergoes a two-step pathway via a formamide intermediate and the reduction of the formamide intermediate to monomethylamine as the rate-determining step. This work can contribute significantly expanding the applications of N-substituted carbonylimidazoles.
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Affiliation(s)
- Lin Chen
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
| | - Xuan Zhou
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
| | - Zhiyong Chen
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
| | - Changxu Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
| | - Shunjie Wang
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
| | - Hanbing Teng
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, China
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13
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González-Lainez M, Jiménez MV, Azpiroz R, Passarelli V, Modrego FJ, Pérez-Torrente JJ. N-Methylation of Amines with Methanol Catalyzed by Iridium(I) Complexes Bearing an N,O-Functionalized NHC Ligand. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel González-Lainez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - M. Victoria Jiménez
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Ramón Azpiroz
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Vincenzo Passarelli
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - F. Javier Modrego
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza-C.S.I.C., 50009 Zaragoza, Spain
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14
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Investigation of NNN Pincer Ruthenium(II) Complexes with a Pendant Hydroxyl Group for N‐Monomethylation of amines and Nitroarenes by Methanol. ChemCatChem 2022. [DOI: 10.1002/cctc.202101630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Zubar V, Brzozowska A, Sklyaruk J, Rueping M. Dehydrogenative and Redox-Neutral N-Heterocyclization of Aminoalcohols Catalyzed by Manganese Pincer Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Viktoriia Zubar
- Chemical Science Program, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Aleksandra Brzozowska
- Chemical Science Program, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Jan Sklyaruk
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Magnus Rueping
- Chemical Science Program, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center, Thuwal 23955-6900, Kingdom of Saudi Arabia
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16
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Zhu L, Ye S, Wang J, Zhu J, He G, Liu X. Supported Iridium Catalyst for Clean Transfer Hydrogenation of Aldehydes and Ketones using Methanol as Hydrogen Source. ChemCatChem 2022. [DOI: 10.1002/cctc.202101794] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Longfei Zhu
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Sen Ye
- The University of Hong Kong Morningside Laboratory for Chemical Biology and Department of Chemistry CHINA
| | - Jing Wang
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Jiazheng Zhu
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Guangke He
- Nanjing Tech University School of Chemistry and Molecular Engineering CHINA
| | - Xiang Liu
- Nanjing Tech University School of Chemistry and Molecular Engineering NO.30 Puzhu Road 211816 Nanjing CHINA
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17
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Biswas N, Srimani D. Ru-Catalyzed Selective Catalytic Methylation and Methylenation Reaction Employing Methanol as the C1 Source. J Org Chem 2021; 86:10544-10554. [PMID: 34263597 DOI: 10.1021/acs.joc.1c01185] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Methanol can be employed as a green and sustainable methylating agent to form C-C and C-N bonds via borrowing hydrogen (BH) methodology. Herein we explored the activity of the acridine-derived SNS-Ru pincer for the activation of methanol to apply it as a C1 building block in different reactions. Our catalytic system shows great success toward the β-C(sp3)-methylation reaction of 2-phenylethanols to provide good to excellent yields of the methylated products. We investigated the mechanistic details, kinetic progress, and temperature-dependent product distribution, which revealed the slow and steady generation of in situ formed aldehyde, is the key factor to get the higher yield of the β-methylated product. To establish the environmental benefit of this reaction, green chemistry metrics are calculated. Furthermore, dimerization of 2-naphthol via methylene linkage and formation of N-methylation of amine are also described in this study, which offers a wide range of substrate scope with a good to excellent yield.
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Affiliation(s)
- Nandita Biswas
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India
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18
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Jiang L, Zhang X, Wang Y, Guo F, Hou Z. N
‐Monomethylation of Amines with Methanol by Syndiotactic Poly(aminostyrene)‐supported Palladium Nanoparticle Catalyst. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100339] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Lei Jiang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China
| | - Xiaoyan Zhang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China
| | - Yinran Wang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China
| | - Fang Guo
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 P. R. China
- Organometallic Chemistry Laboratory RIKEN Cluster for Pioneering Research and Advanced Catalysis Research Group RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
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19
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Biswas N, Srimani D. Synthesis of 1,8-Dioxo-decahydroacridine Derivatives via Ru-Catalyzed Acceptorless Dehydrogenative Multicomponent Reaction. J Org Chem 2021; 86:9733-9743. [PMID: 34170141 DOI: 10.1021/acs.joc.1c01075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Ru-catalyzed acceptorless dehydrogenative multicomponent reaction has been developed. This reaction offers a cost-effective and simple operational strategy to synthesize biologically active 1,8-dioxodecahydroacridine derivatives. The protocol provides a wide range of substrate scope and various functional groups are also well tolerated under the reaction condition. To shed light on the mechanistic and kinetic study, some controlled experiments and deuterium labeling experiments were executed. A time-dependent product distribution experiment is also presented and the reaction scale-up is performed to highlight the practical utility of this strategy.
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Affiliation(s)
- Nandita Biswas
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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20
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21
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Sarki N, Goyal V, Tyagi NK, Puttaswamy, Narani A, Ray A, Natte K. Simple RuCl
3
‐catalyzed
N
‐Methylation of Amines and Transfer Hydrogenation of Nitroarenes using Methanol. ChemCatChem 2021. [DOI: 10.1002/cctc.202001937] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Naina Sarki
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR-HRDC Campus Joggers Road, Kamla Nehru Nagar Ghaziabad Uttar Pradesh 201 002 India
| | - Vishakha Goyal
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR-HRDC Campus Joggers Road, Kamla Nehru Nagar Ghaziabad Uttar Pradesh 201 002 India
| | - Nitin Kumar Tyagi
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
| | - Puttaswamy
- Department of Chemistry Bangalore University Jnana Bharathi Campus Bangalore 560056 India
| | - Anand Narani
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
- BioFuels Division CSIR-Indian Institute of Petroleum (CSIR-IIP) Haridwar Road Mohkampur Dehradun 248 005 India
| | - Anjan Ray
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
- Analytical Sciences Division CSIR-Indian Institute of Petroleum (CSIR-IIP) Haridwar Road Mohkampur Dehradun 248 005 India
| | - Kishore Natte
- Chemical and Material Sciences Division CSIR-Indian Institute of Petroleum Haridwar road Mohkampur Dehradun 248 005 India
- Academy of Scientific and Innovative Research (AcSIR) CSIR-HRDC Campus Joggers Road, Kamla Nehru Nagar Ghaziabad Uttar Pradesh 201 002 India
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22
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Wang X, Zhao K, Wang H, Shi F. Selective synthesis of N-monomethyl amines with primary amines and nitro compounds. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01177d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The development of the selective N-monomethylation of primary amines and nitro compounds by using various methylating agents, such as MeX, carbon dioxide, methanol, formaldehyde, formic acid and dimethyl carbonate.
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Affiliation(s)
- Xinzhi Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, 730000, China
- University of Chinese Academy of Sciences, No. 19A, Yuquan Road, Beijing, 100049, China
| | - Kang Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, 730000, China
- University of Chinese Academy of Sciences, No. 19A, Yuquan Road, Beijing, 100049, China
| | - Hongli Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, 730000, China
| | - Feng Shi
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No. 18, Tianshui Middle Road, Lanzhou, 730000, China
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23
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Yang J, Liu C, Zhou H, Fan R, Ma B, Li Z. Visible-light-promoted α-methoxymethylation and aminomethylation of ketones with methanol as the C1 source. Org Biomol Chem 2021; 19:5572-5576. [PMID: 34085081 DOI: 10.1039/d1ob00765c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Visible-light-promoted α-methoxymethylation and aminomethylation of ketones using methanol as a sustainable C1 source have been developed. With rose bengal as the photosensitizer and air as the green oxidant, the methoxymethylation reactions proceeded smoothly under visible light irradiation at ambient temperature. Additionally, a one-pot one-step α-aminomethylation of ketones was achieved by adding N-nucleophiles. Preliminary mechanism studies suggest that the reaction mainly proceeds via a radical pathway.
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Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Cai Liu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. and College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Rundong Fan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Zheng Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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24
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Piehl P, Amuso R, Spannenberg A, Gabriele B, Neumann H, Beller M. Efficient methylation of anilines with methanol catalysed by cyclometalated ruthenium complexes. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02210a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cyclometalated ruthenium allow the effective and selective N-methylation of anilines under mild conditions.
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Affiliation(s)
- Patrick Piehl
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
| | - Roberta Amuso
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC)
- Department of Chemistry and Chemical Technologies
| | | | - Bartolo Gabriele
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC)
- Department of Chemistry and Chemical Technologies
- University of Calabria
- 87036 Arcavacata di Rende
- Italy
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25
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Wang J, Qiang W, Ye S, Zhu L, Liu X, Loh TP. Additive-free N-methylation of amines with methanol over supported iridium catalyst. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02442b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Clean N-methylation of amines with methanol was achieved, providing a green approach to the selective synthesis of mono- or di-methylated amines.
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Affiliation(s)
- Jing Wang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Centre for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Wenwen Qiang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Centre for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Sen Ye
- Morningside Laboratory for Chemical Biology and Department of Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Longfei Zhu
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Centre for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Xiang Liu
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Centre for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Teck-Peng Loh
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Centre for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
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26
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Wang J, Wu J, Chen ZN, Wen D, Chen J, Zheng Q, Xu X, Tu T. Selective mono-N-methylation of nitroarenes with methanol catalyzed by atomically dispersed NHC-Ir solid assemblies. J Catal 2020. [DOI: 10.1016/j.jcat.2020.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Chakrabarti K, Dutta K, Kundu S. Synthesis of N-methylated amines from acyl azides using methanol. Org Biomol Chem 2020; 18:5891-5896. [PMID: 32677635 DOI: 10.1039/d0ob01303j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The transformation of acyl azide derivatives into N-methylamines was developed using methanol as the C1 source via the one-pot Curtius rearrangement and borrowing hydrogen methodology. Following this protocol, various functionalised N-methylated amines were synthesized using the (NNN)Ru(ii) complex from carboxylic acids via an acyl azide intermediate. Several kinetic studies and DFT calculations were carried out to support the mechanism and also to determine the role of the Ru(ii) complex and base in this transformation.
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Affiliation(s)
- Kaushik Chakrabarti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | - Kuheli Dutta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
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28
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Omprakash Rathi J, Subray Shankarling G. Recent Advances in the Protection of Amine Functionality: A Review. ChemistrySelect 2020. [DOI: 10.1002/slct.202000764] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jyoti Omprakash Rathi
- Department of Dyestuff TechnologyInstitute of Chemical Technology N. P. Marg, Matunga (E) Mumbai 400 019 India
| | - Ganapati Subray Shankarling
- Department of Dyestuff TechnologyInstitute of Chemical Technology N. P. Marg, Matunga (E) Mumbai 400 019 India
- Department of Dyestuff TechnologyInstitute of Chemical Technology N. P. Marg, Matunga (E) Mumbai 400 019 India
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29
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Savela R, Vogt D, Leino R. Ruthenium Catalyzed N
-Alkylation of Cyclic Amines with Primary Alcohols. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Risto Savela
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
| | - Dieter Vogt
- Laboratory of Industrial Chemistry; Department of Biochemical and Chemical Engineering; Technical University of Dortmund; Emil-Figge-Str. 66 44227 Dortmund Germany
| | - Reko Leino
- Laboratory of Molecular Science and Technology; Åbo Akademi University; Biskopsgatan 8 20500 Åbo Finland
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30
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Meng J, Xia HM, Xu AQ, Wang YF, Wang Z, Zhang FL. Selective N-monomethylation of primary anilines with the controllable installation of N-CH2D, N-CHD2, and N-CD3 units. Org Biomol Chem 2020; 18:4922-4926. [DOI: 10.1039/d0ob01054e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The selective N-monomethylation of primary anilines with the controllable installation of N-CH2D, N-CHD2, and N-CD3 units was realized by using the amine-borane/N,N-dimethylformamide (DMF) system as the methyl precursor.
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Affiliation(s)
- Jing Meng
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Hui-Min Xia
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Ai-Qing Xu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Yi-Feng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
| | - Zhijuan Wang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Feng-Lian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- China
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31
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Meng XJ, Pan YZ, Mo SK, Wang HS, Tang HT, Pan YM. Electrochemical α-methoxymethylation and aminomethylation of propiophenones using methanol as a green C1 source. Org Chem Front 2020. [DOI: 10.1039/d0qo00593b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have developed an efficient and convenient strategy for the straightforward α-methoxymethylation and aminomethylation of a series of propiophenones.
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Affiliation(s)
- Xiu-Jin Meng
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Yong-Zhou Pan
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Shi-Kun Mo
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Heng-Shan Wang
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Hai-Tao Tang
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
| | - Ying-Ming Pan
- Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- People's Republic of China
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32
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Ogata O, Nara H, Matsumura K, Kayaki Y. Formal Deoxygenative Hydrogenation of Lactams Using PN HP-Pincer Ruthenium Complexes under Nonacidic Conditions. Org Lett 2019; 21:9954-9959. [PMID: 31809060 DOI: 10.1021/acs.orglett.9b03878] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A formal deoxygenative hydrogenation of amides to amines with RuCl2(NHC)(PNHP) (NHC = 1,3-dimethylimizadol-2-ylidene, PNHP = bis(2-diphenylphosphinoethyl)amine) is described. Various secondary amides, especially NH-lactams, are reduced with H2 (3.0-5.0 MPa) to amines at a temperature range of 120-150 °C with 1.0-2.0 mol % of PNHP-Ru catalysts in the presence of Cs2CO3. This process consists of (1) deaminative hydrogenation of secondary amides to generate primary amines and alcohols, (2) dehydrogenative coupling of the transient amines with alcohols to generate imines, and (3) hydrogenation of imines to give the formally deoxygenated secondary amine products.
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Affiliation(s)
- Osamu Ogata
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Hideki Nara
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Kazuhiko Matsumura
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Yoshihito Kayaki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology , Tokyo Institute of Technology , 2-12-1-E4-1 O-okayama , Meguro-ku, Tokyo 152-8552 , Japan
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33
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Li YJ, Lai HT, Hu CH, Chen JH, Lin CH, Huang JH. Geometric isomerization and geometry controlled catalytic alcohol aminations of ruthenium hydride compounds containing bidentate pyrrolyl-imines. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.120957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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34
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Jiang L, Guo F, Wang Y, Jiang J, Duan Y, Hou Z. Selective
N
‐Monomethylation of Anilines with Methanol Catalyzed by Commercial Pd/C as an Efficient and Reusable Catalyst. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900509] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Lei Jiang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
| | - Fang Guo
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
| | - Yinran Wang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
| | - Jialin Jiang
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
| | - Yangzhi Duan
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
| | - Zhaomin Hou
- State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical EngineeringDalian University of Technology Dalian 116012 China
- Organometallic Chemistry Laboratory and Center for Sustainable Resource Science RIKEN 2-1 Hirosawa Wako, Saitama 351-0198 Japan
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35
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Goyal V, Gahtori J, Narani A, Gupta P, Bordoloi A, Natte K. Commercial Pd/C-Catalyzed N-Methylation of Nitroarenes and Amines Using Methanol as Both C1 and H2 Source. J Org Chem 2019; 84:15389-15398. [DOI: 10.1021/acs.joc.9b02141] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Vishakha Goyal
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | - Jyoti Gahtori
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | - Anand Narani
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | | | - Ankur Bordoloi
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
| | - Kishore Natte
- Academy of Scientific and Innovative Research (AcSIR), CSIR-HRDC Campus, Joggers Road, Kamla Nehru Nagar, Ghaziabad, Uttar Pradesh 201 002, India
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36
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Paul B, Maji M, Kundu S. Atom-Economical and Tandem Conversion of Nitriles to N-Methylated Amides Using Methanol and Water. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03916] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bhaskar Paul
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Milan Maji
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Sabuj Kundu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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37
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Roscales S, Csákÿ AG. Synthesis of Mono- N-Methyl Aromatic Amines from Nitroso Compounds and Methylboronic Acid. ACS OMEGA 2019; 4:13943-13953. [PMID: 31497712 PMCID: PMC6713987 DOI: 10.1021/acsomega.9b01608] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/12/2019] [Indexed: 05/08/2023]
Abstract
The selective synthesis of mono-N-methyl aromatic amines was achieved by the reaction of aromatic nitroso compounds with methylboronic acid promoted by triethylphosphite under transition metal-free conditions. The target compounds are constructed efficiently without overmethylation, under environmentally benign reaction conditions that do not require bases or reductants and therefore are of interest in pharmaceutical, agricultural, and chemical industries.
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38
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Xu G, Yang G, Wang Y, Shao PL, Yau JNN, Liu B, Zhao Y, Sun Y, Xie X, Wang S, Zhang Y, Xia L, Zhao Y. Stereoconvergent, Redox-Neutral Access to Tetrahydroquinoxalines through Relay Epoxide Opening/Amination of Alcohols. Angew Chem Int Ed Engl 2019; 58:14082-14088. [PMID: 31270918 DOI: 10.1002/anie.201906199] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 06/27/2019] [Indexed: 12/19/2022]
Abstract
We present an economical catalytic procedure to convert readily available 1,2-diaminobenzenes and terminal epoxides into valuable 1,2,3,4-tetrahydroquinoxalines in a highly enantioselective fashion. This procedure operates through relay zinc and iridium catalysis, and achieves redox-neutral and stereoconvergent production of valuable chiral heterocycles from racemic starting materials with water as the only side product. The use of commercially available reagents and catalysts and a convenient procedure also make this catalytic method attractive for practical application.
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Affiliation(s)
- Guangda Xu
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Guoqiang Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Yue Wang
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Pan-Lin Shao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Jia Ning Nicolette Yau
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Bing Liu
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Yunbo Zhao
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Ye Sun
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Xinxin Xie
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Shuo Wang
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Yao Zhang
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Lixin Xia
- College of Chemistry, Liaoning University, Shenyang, 110036, P. R. China
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
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Xu G, Yang G, Wang Y, Shao P, Yau JNN, Liu B, Zhao Y, Sun Y, Xie X, Wang S, Zhang Y, Xia L, Zhao Y. Stereoconvergent, Redox‐Neutral Access to Tetrahydroquinoxalines through Relay Epoxide Opening/Amination of Alcohols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906199] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Guangda Xu
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Guoqiang Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
| | - Yue Wang
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Pan‐Lin Shao
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
| | - Jia Ning Nicolette Yau
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
| | - Bing Liu
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Yunbo Zhao
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Ye Sun
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Xinxin Xie
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Shuo Wang
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Yao Zhang
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Lixin Xia
- College of Chemistry Liaoning University Shenyang 110036 P. R. China
| | - Yu Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Singapore Singapore
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40
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In 2O 3 Nanocrystals for CO 2 Fixation: Atomic-Level Insight into the Role of Grain Boundaries. iScience 2019; 16:390-398. [PMID: 31228747 PMCID: PMC6593164 DOI: 10.1016/j.isci.2019.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/13/2019] [Accepted: 06/03/2019] [Indexed: 11/21/2022] Open
Abstract
N-functionalization of amines with CO2 and H2 is one of the most important processes to make use of CO2. Although noble metal-based catalysts with remarkable performance have been widely used in this process, developing efficient non-noble-metal-based catalysts remains a grand challenge. Herein, we report In2O3 nanocrystals with high density of grain boundaries (HGB-In2O3), which show excellent activity toward methylation of amines. Impressively, HGB-In2O3 achieved the optimal yield of 82.7% for N,N-dimethylaniline with a mass activity of 21.2 mmol·g-1h-1 in methylation of N-methylaniline, comparable to noble-metal-based catalysts. As a bonus, HGB-In2O3 held noticeable stability, remarkable selectivity, and comprehensive applicability. Further mechanistic studies revealed that the presence of high density of grain boundaries not only facilitated the adsorption and activation of CO2 to generate CH3OH as the intermediate but also enhanced the activation of N-H bond in amines, contributing to the attractive activity of HGB-In2O3 toward methylation of amines.
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41
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Jankins TC, Qin Z, Engle KM. A practical method for N-alkylation of phosphinic (thio)amides with alcohols via transfer hydrogenation. Tetrahedron 2019; 75:3272-3281. [PMID: 31745374 DOI: 10.1016/j.tet.2019.04.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This manuscript describes a modular method for preparing N-alkyl phosphinic amides from primary or secondary alcohols and primary phosphinic amide (R1R2P=ONH2) nucleophiles via transfer hydrogenation. The transformation typically proceeds in excellent yields, employs conveniently available reagents, and produces water as the only byproduct.
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Affiliation(s)
- Tanner C Jankins
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Ziyang Qin
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Keary M Engle
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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42
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Fu A, Liu Q, Jiang M, Xu G. Selective N‐Monomethylation of Amines and Nitroarenes using Methanol over an Encapsulated Iridium Nanocatalyst. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900140] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Aixiao Fu
- CAS Key Laboratory of Bio-based MaterialsQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao 266101 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Qiang Liu
- CAS Key Laboratory of Bio-based MaterialsQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao 266101 P. R. China
| | - Mingxiang Jiang
- School of Chemistry and Molecular EngineeringEast China University of Science and Technology Shanghai 200237 P. R. China
| | - Guoqiang Xu
- CAS Key Laboratory of Bio-based MaterialsQingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of Sciences Qingdao 266101 P. R. China
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44
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Su L, Ren T, Dong J, Liu L, Xie S, Yuan L, Zhou Y, Yin SF. Cu(I)-Catalyzed 6-endo-dig Cyclization of Terminal Alkynes, 2-Bromoaryl Ketones, and Amides toward 1-Naphthylamines: Applications and Photophysical Properties. J Am Chem Soc 2019; 141:2535-2544. [DOI: 10.1021/jacs.8b12495] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lebin Su
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Tianbing Ren
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Jianyu Dong
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
- Department of Educational Science, Hunan First Normal University, Changsha 410205, China
| | - Lixin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Shimin Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Lin Yuan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Yongbo Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
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45
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Zhang S, Ibrahim JJ, Yang Y. A pincer ligand enabled ruthenium catalyzed highly selective N-monomethylation of nitroarenes with methanol as the C1 source. Org Chem Front 2019. [DOI: 10.1039/c9qo00544g] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A straightforward and highly selective N-monomethylation of nitroarenes with methanol as the C1 source was developed.
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Affiliation(s)
- Shaochun Zhang
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao 266101
- PR China
| | - Jessica Juweriah Ibrahim
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao 266101
- PR China
- University of Chinese Academy of Sciences
| | - Yong Yang
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao 266101
- PR China
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46
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Chen Y. Recent Advances in Methylation: A Guide for Selecting Methylation Reagents. Chemistry 2018; 25:3405-3439. [DOI: 10.1002/chem.201803642] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Yantao Chen
- Medicinal Chemistry, Cardiovascular, Renal and Metabolism, IMED Biotech UnitAstraZeneca Gothenburg Sweden
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47
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Lator A, Gaillard S, Poater A, Renaud JL. Well-Defined Phosphine-Free Iron-Catalyzed N-Ethylation and N-Methylation of Amines with Ethanol and Methanol. Org Lett 2018; 20:5985-5990. [PMID: 30234993 DOI: 10.1021/acs.orglett.8b02080] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An iron(0) complex bearing a cyclopentadienone ligand catalyzed N-methylation and N-ethylation of aryl and aliphatic amines with methanol or ethanol in mild and basic conditions through a hydrogen autotransfer borrowing process is reported. A broad range of aromatic and aliphatic amines underwent mono- or dimethylation in high yields. DFT calculations suggest molecular hydrogen acts not only as a reducing agent but also as an additive to displace thermodynamic equilibria.
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Affiliation(s)
- Alexis Lator
- Normandie Université, LCMT, ENSICAEN, UNICAEN, CNRS , 6 boulevard du Maréchal Juin , 14000 Caen , France
| | - Sylvain Gaillard
- Normandie Université, LCMT, ENSICAEN, UNICAEN, CNRS , 6 boulevard du Maréchal Juin , 14000 Caen , France
| | - Albert Poater
- Departament de Química, Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , c/Ma Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Jean-Luc Renaud
- Normandie Université, LCMT, ENSICAEN, UNICAEN, CNRS , 6 boulevard du Maréchal Juin , 14000 Caen , France
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48
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Ogata O, Nara H, Fujiwhara M, Matsumura K, Kayaki Y. N-Monomethylation of Aromatic Amines with Methanol via PN HP-Pincer Ru Catalysts. Org Lett 2018; 20:3866-3870. [PMID: 29939027 DOI: 10.1021/acs.orglett.8b01449] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of methanol for the selective methylation of aromatic amines with RuHCl(CO)(PNHP) (PNHP = bis(2-diphenylphosphinoethyl)amine) is reported. Various aromatic amines were transformed into their corresponding monomethylated secondary amines in high yields at 150 °C with a very low catalyst loading (0.02-0.1 mol %) in the presence of KO tBu (20-60 mol %). The catalyst precursor, RuHCl(CO)(PNHP), was converted to [RuH(CO)2(PNHP)]+ under the catalytic conditions and also serves as a highly effective catalyst. The robustness of this catalyst contributes to its outstanding catalytic activity, even under reaction conditions, in which CO is liberated from methanol.
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Affiliation(s)
- Osamu Ogata
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Hideki Nara
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Mitsuhiko Fujiwhara
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Kazuhiko Matsumura
- Corporate Research and Development Division , Takasago International Corporation , 1-4-11 Nishi-Yawata , Hiratsuka , Kanagawa 254-0073 , Japan
| | - Yoshihito Kayaki
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology , Tokyo Institute of Technology , 2-12-1-E4-1 O-okayama , Meguro-ku , Tokyo 152-8552 , Japan
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