1
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Gao P, Rahman MM, Zamalloa A, Feliciano J, Szostak M. Classes of Amides that Undergo Selective N-C Amide Bond Activation: The Emergence of Ground-State Destabilization. J Org Chem 2023; 88:13371-13391. [PMID: 36054817 DOI: 10.1021/acs.joc.2c01094] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ground-state destabilization of the N-C(O) linkage represents a powerful tool to functionalize the historically inert amide bond. This burgeoning reaction manifold relies on the availability of amide bond precursors that participate in weakening of the nN → π*C=O conjugation through N-C twisting, N pyramidalization, and nN electronic delocalization. Since 2015, acyl N-C amide bond activation through ground-state destabilization of the amide bond has been achieved by transition-metal-catalyzed oxidative addition of the N-C(O) bond, generation of acyl radicals, and transition-metal-free acyl addition. This Perspective summarizes contributions of our laboratory in the development of new ground-state-destabilized amide precursors enabled by twist and electronic activation of the amide bond and synthetic utility of ground-state-destabilized amides in cross-coupling reactions and acyl addition reactions. The use of ground-state-destabilized amides as electrophiles enables a plethora of previously unknown transformations of the amide bond, such as acyl coupling, decarbonylative coupling, radical coupling, and transition-metal-free coupling to forge new C-C, C-N, C-O, C-S, C-P, and C-B bonds. Structural studies of activated amides and catalytic systems developed in the past decade enable the view of the amide bond to change from the "traditionally inert" to "readily modifiable" functional group with a continuum of reactivity dictated by ground-state destabilization.
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Affiliation(s)
- Pengcheng Gao
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Md Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Alfredo Zamalloa
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Jessica Feliciano
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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2
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Yamasaki R, Okada Y, Iizumi H, Ito A, Fukuda K, Okamoto I. Structure and Additive-free Transamidation of Planar N-Cyano Amides. J Org Chem 2023; 88:5704-5712. [PMID: 37094254 DOI: 10.1021/acs.joc.3c00172] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Although transamidation of amides generally requires metals, additives, or harsh conditions, we present here a facile transamidation of N-cyano amides with various amines at ambient temperature without any additive. N-cyano amides preferred the trans conformation and have a reduced double bond character revealed by crystal analysis. The DFT study indicates that the transamidation reaction proceeds through the direct attack of amine on the amide carbonyl since the LUMO (or LUMO+1) is located at the carbonyl moiety.
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Affiliation(s)
- Ryu Yamasaki
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Yuko Okada
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Hiromi Iizumi
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Ai Ito
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Kazuo Fukuda
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
| | - Iwao Okamoto
- Showa Pharmaceutical University, 3-3165 Higashi-tamagawagakuen, Machida, Tokyo 194-8543, Japan
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3
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Bai J, Li S, Zhu R, Li Y, Li W. B 2(OH) 4-Mediated Reductive Transamidation of N-Acyl Benzotriazoles with Nitro Compounds En Route to Aqueous Amide Synthesis. J Org Chem 2023; 88:3714-3723. [PMID: 36888556 DOI: 10.1021/acs.joc.2c02995] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Abstract
We herein developed a reductive transamidation reaction between N-acyl benzotriazoles (AcBt) and organic nitro compounds or NaNO2 under mild conditions. This protocol employed the stable and readily available B2(OH)4 as the reducing agent and H2O as the ideal solvent. N-Deuterated amides can be synthesized when conducting the reaction in D2O. A reasonable reaction mechanism involving bond metathesis between the AcBt amide and amino boric acid intermediate was proposed to explain the unique nature of AcBt.
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Affiliation(s)
- Jin Bai
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Shangzhang Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Riqian Zhu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Yang Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Wanfang Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
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4
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Liu C, Szostak M. Amide N-C Bond Activation: A Graphical Overview of Acyl and Decarbonylative Coupling. SYNOPEN 2023; 7:88-101. [PMID: 38037650 PMCID: PMC10686541 DOI: 10.1055/a-2035-6733] [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] [Indexed: 02/16/2023] Open
Abstract
This Graphical Review provides an overview of amide bond activation achieved by selective oxidative addition of the N-C(O) acyl bond to transition metals and nucleophilic acyl addition, resulting in acyl and decarbonylative coupling together with key mechanistic details pertaining to amide bond distortion underlying this reactivity manifold.
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Affiliation(s)
- Chengwei Liu
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, China
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
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5
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Ochmann M, Vaz da Cruz V, Eckert S, Huse N, Föhlisch A. R-Group stabilization in methylated formamides observed by resonant inelastic X-ray scattering. Chem Commun (Camb) 2022; 58:8834-8837. [PMID: 35848855 PMCID: PMC9350990 DOI: 10.1039/d2cc00053a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inherent stability of methylated formamides is traced to a stabilization of the deep-lying σ-framework by resonant inelastic X-ray scattering at the nitrogen K-edge. Charge transfer from the amide nitrogen to the methyl groups underlie this stabilization mechanism that leaves the aldehyde group essentially unaltered and explains the stability of secondary and tertiary amides. The inherent stability of methylated formamides is traced to a stabilization of the deep-lying σ-framework by resonant inelastic X-ray scattering at the nitrogen K-edge.![]()
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Affiliation(s)
- Miguel Ochmann
- Department of Physics, University of Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Vinícius Vaz da Cruz
- Institute for Methods and Instrumentation in Synchrotron Radiation Research G-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
| | - Sebastian Eckert
- Institute for Methods and Instrumentation in Synchrotron Radiation Research G-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.
| | - Nils Huse
- Department of Physics, University of Hamburg and Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany.
| | - Alexander Föhlisch
- Institute for Methods and Instrumentation in Synchrotron Radiation Research G-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany. .,Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
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6
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022; 61:e202203539. [DOI: 10.1002/anie.202203539] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Indexed: 12/14/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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7
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Cetin HK, Baytaroglu C. The Impact of Age on Percutaneous Thrombectomy Outcomes in the Management of Lower Extremity Deep Vein Thrombosis. HASEKI TIP BÜLTENI 2022. [DOI: 10.4274/haseki.galenos.2022.8233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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8
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Hoque ME, Bisht R, Unnikrishnan A, Dey S, Mahamudul Hassan MM, Guria S, Rai RN, Sunoj RB, Chattopadhyay B. Iridium‐Catalyzed Ligand‐Controlled Remote
para
‐Selective C−H Activation and Borylation of Twisted Aromatic Amides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Anju Unnikrishnan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Sayan Dey
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Mirja Md Mahamudul Hassan
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Saikat Guria
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
| | - Rama Nand Rai
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Raghavan B. Sunoj
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400076 India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR), SGPGIMS Campus Raebareli Road Lucknow 226014, U.P. India
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9
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Dorval C, Stetsiuk O, Gaillard S, Dubois E, Gosmini C, Danoun G. Cobalt Bromide-Catalyzed Negishi-Type Cross-Coupling of Amides. Org Lett 2022; 24:2778-2782. [PMID: 35380446 DOI: 10.1021/acs.orglett.2c00940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we describe a novel Negishi-type cross-coupling of amides employing only cobalt bromide salt as the catalyst. This original reaction is highly tolerant to various glutarimide amides as well as organozinc coupling partners. These conditions also allow the performance of the cross-coupling reaction in an eco-compatible solvent such as ethyl acetate on a large scale.
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Affiliation(s)
- Céline Dorval
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Oleh Stetsiuk
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Sylvaine Gaillard
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Elodie Dubois
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Corinne Gosmini
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Grégory Danoun
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
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10
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Qu E, Li S, Bai J, Zheng Y, Li W. Nickel-Catalyzed Reductive Cross-Coupling of N-Acyl and N-Sulfonyl Benzotriazoles with Diverse Nitro Compounds: Rapid Access to Amides and Sulfonamides. Org Lett 2021; 24:58-63. [PMID: 34904834 DOI: 10.1021/acs.orglett.1c03535] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we report a Ni-catalyzed reductive transamidation of conveniently available N-acyl benzotriazoles with alkyl, alkenyl, and aryl nitro compounds, which afforded various amides with good yields and a broad substrate scope. The same catalytic reaction conditions were also applicable for N-sulfonyl benzotriazoles, which could undergo smooth reductive coupling with nitroarenes and nitroalkanes to afford the corresponding sulfonamides.
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Affiliation(s)
- Erdong Qu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Shangzhang Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Jin Bai
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Yan Zheng
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Wanfang Li
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
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11
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Abstract
In this contribution, we provide a comprehensive overview of acyclic twisted amides, covering the literature since 1993 (the year of the first recognized report on acyclic twisted amides) through June 2020. The review focuses on classes of acyclic twisted amides and their key structural properties, such as amide bond twist and nitrogen pyramidalization, which are primarily responsible for disrupting nN to π*C═O conjugation. Through discussing acyclic twisted amides in comparison with the classic bridged lactams and conformationally restricted cyclic fused amides, the reader is provided with an overview of amidic distortion that results in novel conformational features of acyclic amides that can be exploited in various fields of chemistry ranging from organic synthesis and polymers to biochemistry and structural chemistry and the current position of acyclic twisted amides in modern chemistry.
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Affiliation(s)
- Guangrong Meng
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Jin Zhang
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States.,College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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12
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Bao CC, Du HZ, Luo YL, Guan BT. Direct alkylation of N,N-dialkyl benzamides with methyl sulfides under transition metal-free conditions. Commun Chem 2021; 4:138. [PMID: 36697564 PMCID: PMC9814863 DOI: 10.1038/s42004-021-00575-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 08/19/2021] [Indexed: 01/28/2023] Open
Abstract
Amides are a fundamental and widespread functional group, and are usually considered as poor electrophiles owing to resonance stabilization of the amide bond. Various approaches have been developed to address challenges in amide transformations. Nonetheless, most methods use activated amides, organometallic reagents or transition metal catalysts. Here, we report the direct alkylation of N,N-dialkyl benzamides with methyl sulfides promoted by the readily available base LDA (lithium diisopropylamide). This approach successfully achieves an efficient and selective synthesis of α-sulfenylated ketones without using transition-metal catalysts or organometallic reagents. Preliminary mechanism studies reveal that the deprotonative aroylation of methyl sulfides is promoted by the directed ortho-lithiation of the tertiary benzamide with LDA.
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Affiliation(s)
- Can-Can Bao
- grid.216938.70000 0000 9878 7032College of Chemistry, Nankai University, Tianjin, China
| | - Hui-Zhen Du
- grid.216938.70000 0000 9878 7032College of Chemistry, Nankai University, Tianjin, China
| | - Yan-Long Luo
- grid.216938.70000 0000 9878 7032College of Chemistry, Nankai University, Tianjin, China
| | - Bing-Tao Guan
- grid.8547.e0000 0001 0125 2443Department of Chemistry, Fudan University, Shanghai, China
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13
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Rahman MM, Pyle DJ, Bisz E, Dziuk B, Ejsmont K, Lalancette R, Wang Q, Chen H, Szostak R, Szostak M. Evaluation of Cyclic Amides as Activating Groups in N-C Bond Cross-Coupling: Discovery of N-Acyl-δ-valerolactams as Effective Twisted Amide Precursors for Cross-Coupling Reactions. J Org Chem 2021; 86:10455-10466. [PMID: 34275281 DOI: 10.1021/acs.joc.1c01110] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of efficient methods for facilitating N-C(O) bond activation in amides is an important objective in organic synthesis that permits the manipulation of the traditionally unreactive amide bonds. Herein, we report a comparative evaluation of a series of cyclic amides as activating groups in amide N-C(O) bond cross-coupling. Evaluation of N-acyl-imides, N-acyl-lactams, and N-acyl-oxazolidinones bearing five- and six-membered rings using Pd(II)-NHC and Pd-phosphine systems reveals the relative reactivity order of N-activating groups in Suzuki-Miyaura cross-coupling. The reactivity of activated phenolic esters and thioesters is evaluated for comparison in O-C(O) and S-C(O) cross-coupling under the same reaction conditions. Most notably, the study reveals N-acyl-δ-valerolactams as a highly effective class of mono-N-acyl-activated amide precursors in cross-coupling. The X-ray structure of the model N-acyl-δ-valerolactam is characterized by an additive Winkler-Dunitz distortion parameter Σ(τ+χN) of 54.0°, placing this amide in a medium distortion range of twisted amides. Computational studies provide insight into the structural and energetic parameters of the amide bond, including amidic resonance, N/O-protonation aptitude, and the rotational barrier around the N-C(O) axis. This class of N-acyl-lactams will be a valuable addition to the growing portfolio of amide electrophiles for cross-coupling reactions by acyl-metal intermediates.
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Affiliation(s)
- Md Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Daniel J Pyle
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Elwira Bisz
- Department of Chemistry, Opole University, 48 Oleska Street, Opole 45-052, Poland
| | - Błażej Dziuk
- Department of Chemistry, Opole University, 48 Oleska Street, Opole 45-052, Poland.,Department of Chemistry, Wroclaw University of Science and Technology, Norwida 4/6 14, Wroclaw 50-373, Poland
| | - Krzysztof Ejsmont
- Department of Chemistry, Opole University, 48 Oleska Street, Opole 45-052, Poland
| | - Roger Lalancette
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Qi Wang
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Hao Chen
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Roman Szostak
- Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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14
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Bao CC, Luo YL, Du HZ, Guan BT. Benzylic aroylation of toluenes with unactivated tertiary benzamides promoted by directed ortho-lithiation. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1035-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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15
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Xie. P, Qin Z, Zhang S, Hong X. Understanding the Structure‐Activity Relationship of Ni‐Catalyzed Amide C−N Bond Activation using Distortion/Interaction Analysis. ChemCatChem 2021. [DOI: 10.1002/cctc.202100672] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pei‐Pei Xie.
- Center of Chemistry for Frontier Technologies Department of Chemistry Zhejiang University Hangzhou 310027 P.R. China
| | - Zhi‐Xin Qin
- Center of Chemistry for Frontier Technologies Department of Chemistry Zhejiang University Hangzhou 310027 P.R. China
| | - Shuo‐Qing Zhang
- Center of Chemistry for Frontier Technologies Department of Chemistry Zhejiang University Hangzhou 310027 P.R. China
| | - Xin Hong
- Center of Chemistry for Frontier Technologies Department of Chemistry Zhejiang University Hangzhou 310027 P.R. China
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16
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Majewski A, Chojnacki J, Przychodzeń W. Unexpected Z/E isomerism of N-methyl-O-phosphothioyl benzohydroxamic acids, their oxyphilic reactivity and inertness to amines. Struct Chem 2021. [DOI: 10.1007/s11224-020-01719-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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17
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Garcı́a-Cárceles J, Bahou KA, Bower JF. Recent Methodologies That Exploit Oxidative Addition of C–N Bonds to Transition Metals. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03341] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | - Karim A. Bahou
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
| | - John F. Bower
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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18
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Idris MA, Lee S. Palladium-Catalyzed Amide N–C Hiyama Cross-Coupling: Synthesis of Ketones. Org Lett 2020; 22:9190-9195. [DOI: 10.1021/acs.orglett.0c03260] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Muhammad Aliyu Idris
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry Chonnam National University, Gwangju 61186, Republic of Korea
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19
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Hirai T, Kato D, Mai BK, Katayama S, Akiyama S, Nagae H, Himo F, Mashima K. Esterification of Tertiary Amides: Remarkable Additive Effects of Potassium Alkoxides for Generating Hetero Manganese-Potassium Dinuclear Active Species. Chemistry 2020; 26:10735-10742. [PMID: 32346933 PMCID: PMC7496701 DOI: 10.1002/chem.202001447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Indexed: 02/03/2023]
Abstract
A catalyst system of mononuclear manganese precursor 3 combined with potassium alkoxide served as a superior catalyst compared with our previously reported manganese homodinuclear catalyst 2 a for esterification of not only tertiary aryl amides, but also tertiary aliphatic amides. On the basis of stoichiometric reactions of 3 and potassium alkoxide salt, kinetic studies, and density functional theory (DFT) calculations, we clarified a plausible reaction mechanism in which in situ generated manganese-potassium heterodinuclear species cooperatively activates the carbonyl moiety of the amide and the OH moiety of the alcohols. We also revealed details of the reaction mechanism of our previous manganese homodinuclear system 2 a, and we found that the activation free energy (ΔG≠ ) for the manganese-potassium heterodinuclear complex catalyzed esterification of amides is lower than that for the manganese homodinuclear system, which was consistent with the experimental results. We further applied our catalyst system to deprotect the acetyl moiety of primary and secondary amines.
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Affiliation(s)
- Takahiro Hirai
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Daiki Kato
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Binh Khanh Mai
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Shoichiro Katayama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Shoko Akiyama
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Haruki Nagae
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
| | - Fahmi Himo
- Department of Organic ChemistryArrhenius LaboratoryStockholm UniversitySE-106 91StockholmSweden
| | - Kazushi Mashima
- Department of ChemistryGraduate School of Engineering ScienceOsaka UniversityToyonakaOsaka560-8531Japan
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20
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Shi W, Sun G, Zou G. Ball-milling enables highly selective solvent-free N-tert-butoxycarbonylation for activation of amides. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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21
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Quan H, Wang L, Wang Z, Mei X, Ning J, She D. Application of N‐Acylimidazoles in the Claisen Condensation Reaction. ChemistrySelect 2020. [DOI: 10.1002/slct.202001944] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haiyuan Quan
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Liuyang Wang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Zhinan Wang
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Xiangdong Mei
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Jun Ning
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Dongmei She
- State Key Laboratory for Biology of Plant Diseases and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
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22
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Rahman MM, Liu C, Bisz E, Dziuk B, Lalancette R, Wang Q, Chen H, Szostak R, Szostak M. N-Acyl-glutarimides: Effect of Glutarimide Ring on the Structures of Fully Perpendicular Twisted Amides and N–C Bond Cross-Coupling. J Org Chem 2020; 85:5475-5485. [DOI: 10.1021/acs.joc.0c00227] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Md. Mahbubur Rahman
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Chengwei Liu
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Elwira Bisz
- Department of Chemistry, Opole University, 48 Oleska Street, Opole 45-052, Poland
| | - Błażej Dziuk
- Department of Chemistry, Opole University, 48 Oleska Street, Opole 45-052, Poland
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-373 Wrocław, Poland
| | - Roger Lalancette
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Qi Wang
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Hao Chen
- Department of Chemistry & Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Roman Szostak
- Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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23
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Chen J, Xu M, Yu S, Xia Y, Lee S. Nickel-Catalyzed Claisen Condensation Reaction between Two Different Amides. Org Lett 2020; 22:2287-2292. [DOI: 10.1021/acs.orglett.0c00485] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jiajia Chen
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325035, P. R. China
| | - Man Xu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325035, P. R. China
| | - Subeen Yu
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325035, P. R. China
| | - Sunwoo Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
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24
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Ni-catalyzed direct alcoholysis of N-acylpyrrole-type tertiary amides under mild conditions. Sci China Chem 2020. [DOI: 10.1007/s11426-019-9665-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Abstract
Double C–N bond cleavage of amides and tertiary amines afforded the transamidated products in good yields.
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Affiliation(s)
- Muhammad Aliyu Idris
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
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26
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Yang D, Shin T, Kim H, Lee S. Nickel/briphos-catalyzed transamidation of unactivated tertiary amides. Org Biomol Chem 2020; 18:6053-6057. [DOI: 10.1039/d0ob01271h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The transamidation of tertiary amides was achieved via nickel catalysis in combination with briphos ligands.
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Affiliation(s)
- Dahyeon Yang
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Taeil Shin
- Department of Chemistry
- Daejeon 34141
- Republic of Korea
| | - Hyunwoo Kim
- Department of Chemistry
- Daejeon 34141
- Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
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27
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Champetter P, Castillo-Aguilera O, Taillier C, Brière JF, Dalla V, Oudeyer S, Comesse S. N
-Alkoxyacrylamides in Domino Reactions: Catalytic and Stereoselective Access to δ-Lactams. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901528] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
| | | | | | | | - Vincent Dalla
- Normandie Univ; UNILEHAVRE FR 3038 CNRS, URCOM; 76600 Le Havre France
| | - Sylvain Oudeyer
- UNIROUEN, INSA Rouen, CNRS, COBRA; Normandie Univ; 76000 Rouen France
| | - Sébastien Comesse
- Normandie Univ; UNILEHAVRE FR 3038 CNRS, URCOM; 76600 Le Havre France
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28
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Dorval C, Dubois E, Bourne‐Branchu Y, Gosmini C, Danoun G. Sequential Organozinc Formation and Negishi Cross‐Coupling of Amides Catalysed by Cobalt Salt. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801577] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Céline Dorval
- LCM, CNRS, Ecole PolytechniqueUniversité Paris-Saclay 91128 Palaiseau Cedex France
| | - Elodie Dubois
- LCM, CNRS, Ecole PolytechniqueUniversité Paris-Saclay 91128 Palaiseau Cedex France
| | - Yann Bourne‐Branchu
- LCM, CNRS, Ecole PolytechniqueUniversité Paris-Saclay 91128 Palaiseau Cedex France
| | - Corinne Gosmini
- LCM, CNRS, Ecole PolytechniqueUniversité Paris-Saclay 91128 Palaiseau Cedex France
| | - Grégory Danoun
- LCM, CNRS, Ecole PolytechniqueUniversité Paris-Saclay 91128 Palaiseau Cedex France
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29
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Zeynizadeh B, Mousavi H, Zarrin S. Application of Cu(Hdmg)
2
as a simple and cost‐effective catalyst for the convenient one‐pot reductive acetylation of aromatic nitro compounds. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800325] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Behzad Zeynizadeh
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
| | - Hossein Mousavi
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
| | - Saviz Zarrin
- Department of Organic Chemistry, Faculty of ChemistryUrmia University Urmia Iran
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30
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Fast Amide Bond Cleavage Assisted by a Secondary Amino and a Carboxyl Group-A Model for yet Unknown Peptidases? Molecules 2019; 24:molecules24030572. [PMID: 30764512 PMCID: PMC6384577 DOI: 10.3390/molecules24030572] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 01/30/2019] [Accepted: 01/31/2019] [Indexed: 12/13/2022] Open
Abstract
Unconstrained amides that undergo fast hydrolysis under mild conditions are valuable sources of information about how amide bonds may be activated in enzymatic transformations. We report a compound possessing an unconstrained amide bond surrounded by an amino and a carboxyl group, each mounted in close proximity on a bicyclic scaffold. Fast amide hydrolysis of this model compound was found to depend on the presence of both the amino and carboxyl functions, and to involve a proton transfer in the rate-limiting step. Possible mechanisms for the hydrolytic cleavage and their relevance to peptide bond cleavage catalyzed by natural enzymes are discussed. Experimental observations suggest that the most probable mechanisms of the model compound hydrolysis might include a twisted amide intermediate and a rate-determining proton transfer.
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31
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Chaudhari MB, Gnanaprakasam B. Recent Advances in the Metal-Catalyzed Activation of Amide Bonds. Chem Asian J 2018; 14:76-93. [DOI: 10.1002/asia.201801317] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/13/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Moreshwar B. Chaudhari
- Indian Institute of Science Education and Research (IISER) Pune; Dr. Homi Bhabha Road Pune 411008 India
| | - Boopathy Gnanaprakasam
- Indian Institute of Science Education and Research (IISER) Pune; Dr. Homi Bhabha Road Pune 411008 India
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32
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Bourne‐Branchu Y, Gosmini C, Danoun G. N
‐Boc‐Amides in Cross‐Coupling Reactions. Chemistry 2018; 25:2663-2674. [DOI: 10.1002/chem.201802635] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/04/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Yann Bourne‐Branchu
- LCM, CNRS, Ecole Polytechnique Université Paris-Saclay 91128 Palaiseau Cedex France
| | - Corinne Gosmini
- LCM, CNRS, Ecole Polytechnique Université Paris-Saclay 91128 Palaiseau Cedex France
| | - Grégory Danoun
- LCM, CNRS, Ecole Polytechnique Université Paris-Saclay 91128 Palaiseau Cedex France
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33
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Yu S, Shin T, Zhang M, Xia Y, Kim H, Lee S. Nickel/Briphos-Catalyzed Direct Transamidation of Unactivated Secondary Amides Using Trimethylsilyl Chloride. Org Lett 2018; 20:7563-7566. [DOI: 10.1021/acs.orglett.8b03304] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subeen Yu
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Taeil Shin
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Maosheng Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325035, P. R. China
| | - Yuanzhi Xia
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang Province 325035, P. R. China
| | - Hyunwoo Kim
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Sunwoo Lee
- Department of Chemistry, Chonnam National University, Gwangju 61186, Republic of Korea
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34
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Piontek A, Bisz E, Dziuk B, Szostak R, Szostak M. Structures and energetic properties of 4-halobenzamides. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:1395-1402. [PMID: 30398194 DOI: 10.1107/s2053229618013463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 09/20/2018] [Indexed: 01/17/2023]
Abstract
The amide bond represents one of the most fundamental functional groups in chemistry. The properties of amides are defined by amidic resonance (nN→π*C=O conjugation), which enforces planarity of the six atoms comprising the amide bond. Despite the importance of 4-halo-substituted benzamides in organic synthesis, molecular interactions and medicinal chemistry, the effect of 4-halo-substitution on the properties of the amide bond in N,N-disubstituted benzamides has not been studied. Herein, we report the crystal structures and energetic properties of a full series of 4-halobenzamides. The structures of four 4-halobenzamides (halo = iodo, bromo, chloro and fluoro) in the N-morpholinyl series have been determined, namely 4-[(4-halophenyl)carbonyl]morpholine, C11H12XNO2, for halo = iodo (X = I), bromo (X = Br), chloro (X = Cl) and fluoro (X = F). Computations have been used to determine the effect of halogen substitution on the structures and resonance energies. 4-Iodo-N-morpholinylbenzamide crystallized with a significant distortion of the amide bond (τ + χN = 33°). The present study supports the correlation between the Ar-C(O) axis twist angle and the twist angle of the amide N-C(O) bond. Comparison of resonance energies in synthetically valuable N-morpholinyl and N-piperidinyl amides demonstrates that the O atom of the morpholinyl ring has a negligible effect on amidic resonance in the series.
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Affiliation(s)
- Aleksandra Piontek
- Department of Chemistry, University of Opole, 48 Oleska Street, Opole 45-052, Poland
| | - Elwira Bisz
- Department of Chemistry, University of Opole, 48 Oleska Street, Opole 45-052, Poland
| | - Błażej Dziuk
- Department of Chemistry, University of Opole, 48 Oleska Street, Opole 45-052, Poland
| | - Roman Szostak
- Department of Chemistry, Wroclaw University, F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, USA
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35
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Amide Effects in C−H Activation: Noncovalent Interactions with L-Shaped Ligand for meta
Borylation of Aromatic Amides. Angew Chem Int Ed Engl 2018; 57:15762-15766. [DOI: 10.1002/anie.201809929] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Indexed: 11/07/2022]
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36
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Bisht R, Hoque ME, Chattopadhyay B. Amide Effects in C−H Activation: Noncovalent Interactions with L-Shaped Ligand for meta
Borylation of Aromatic Amides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809929] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ranjana Bisht
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
| | - Md Emdadul Hoque
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery, Centre of Bio-Medical Research (CBMR); SGPGIMS Campus; Raebareli Road Lucknow 226014 U.P. India
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37
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Amatov T, Jangra H, Pohl R, Cisařová I, Zipse H, Jahn U. Unique Stereoselective Homolytic C-O Bond Activation in Diketopiperazine-Derived Alkoxyamines by Adjacent Amide Pyramidalization. Chemistry 2018; 24:15336-15345. [PMID: 30092124 DOI: 10.1002/chem.201803284] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 08/02/2018] [Indexed: 12/12/2022]
Abstract
Simple monocyclic diketopiperazine (DKP)-derived alkoxyamines exhibit unprecedented activation of a remote C-O bond for homolysis by amide distortion. The combination of strain-release-driven amide planarization and the persistent radical effect (PRE) enables a unique, irreversible, and quantitative trans→cis isomerization under much milder conditions than typically observed for such homolysis-limited reactions. This isomerization is shown to be general and independent of the steric and electronic nature of both the amino acid side chains and the substituents at the DKP nitrogen atoms. Homolysis rate constants are determined, and they significantly differ for both the labile trans diastereomers and the stable cis diastereomers. To reveal the factors influencing this unusual process, structural features of the kinetic trans diastereomers and thermodynamic cis diastereomers are investigated in the solid state and in solution. X-ray crystallographic analysis and computational studies indicate substantial distortion of the amide bond from planarity in the trans-alkoxyamines, and this is believed to be the cause for the facile and quantitative isomerization. Thus, these amino-acid-derived alkoxyamines are the first examples that exhibit a large thermodynamic preference for one diastereomer over the other upon thermal homolysis, and this allows controlled switching of configurations and configurational cycling.
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Affiliation(s)
- Tynchtyk Amatov
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610, Prague, Czech Republic.,Ludwig Maximilian University, Department of Chemistry, Butenandstrasse 5-13, 81377, München, Germany
| | - Harish Jangra
- Ludwig Maximilian University, Department of Chemistry, Butenandstrasse 5-13, 81377, München, Germany
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610, Prague, Czech Republic
| | - Ivana Cisařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843, Prague, Czech Republic
| | - Hendrik Zipse
- Ludwig Maximilian University, Department of Chemistry, Butenandstrasse 5-13, 81377, München, Germany
| | - Ullrich Jahn
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo náměstí 2, 16610, Prague, Czech Republic
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38
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Wang C, Huang L, Wang F, Zou G. Highly efficient synthesis of aryl ketones by PEPPSI-palladium catalyzed acylative Suzuki coupling of amides with diarylborinic acids. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.05.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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39
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Mason JD, Weinreb SM. Synthesis of Alstoscholarisines A-E, Monoterpene Indole Alkaloids with Modulating Effects on Neural Stem Cells. J Org Chem 2018; 83:5877-5896. [PMID: 29733650 DOI: 10.1021/acs.joc.8b00889] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A divergent synthetic strategy has been developed for stereoselective total syntheses of alstoscholarisines A-E, monoterpenoid indole alkaloids which are modulators of adult neuronal stem cells. A pivotal step includes an intermolecular Michael addition of an indole-2-acetic acid methyl ester enolate to an α,β-unsaturated N-sulfonyllactam to form the C15, C16 bond of the alkaloids. Other features of the strategy involve a selective partial reduction of an intermediate N-sulfonyllactam followed by cyclization to a bridged aminal system that serves as a key precursor for all five of the alkaloids as well as the use of an allyl group as a masked aldehyde equivalent.
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Affiliation(s)
- Jeremy D Mason
- Department of Chemistry , The Pennsylvania State University University Park , Pennsylvania 16802 , United States
| | - Steven M Weinreb
- Department of Chemistry , The Pennsylvania State University University Park , Pennsylvania 16802 , United States
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40
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Hu XN, Shen TL, Cai DC, Zheng JF, Huang PQ. The iridium-catalysed reductive coupling reaction of tertiary lactams/amides with isocyanoacetates. Org Chem Front 2018. [DOI: 10.1039/c8qo00312b] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A catalytic reductive addition of isocyanoacetates to tertiary lactams/amides has been developed. This one-pot procedure involves Ir-catalysed partial reduction of lactams/amides and sequential chemoselective addition of isocyanide group in isocyanoacetates and produces 5-methoxyoxazoles in moderate to excellent yields.
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Affiliation(s)
- Xiu-Ning Hu
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Tai-Long Shen
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Dong-Cheng Cai
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jian-Feng Zheng
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Pei-Qiang Huang
- Department of Chemistry
- Fujian Provincial Key Laboratory of Chemical Biology
- iChEM (Collaborative Innovation Center of Chemistry for Energy Materials)
- College of Chemistry and Chemical Engineering
- Xiamen University
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