1
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Hanley D, Li ZQ, Gao S, Virgil SC, Arnold FH, Alfonzo E. Stereospecific Enzymatic Conversion of Boronic Acids to Amines. J Am Chem Soc 2024. [PMID: 38958264 DOI: 10.1021/jacs.4c04190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Boronic acids and esters are highly regarded for their safety, unique reactivity, and versatility in synthesizing a wide range of small molecules, bioconjugates, and materials. They are not exploited in biocatalytic synthesis, however, because enzymes that can make, break, or modify carbon-boron bonds are rare. We wish to combine the advantages of boronic acids and esters for molecular assembly with biocatalysis, which offers the potential for unsurpassed selectivity and efficiency. Here, we introduce an engineered protoglobin nitrene transferase that catalyzes the new-to-nature amination of boronic acids using hydroxylamine. Initially targeting aryl boronic acids, we show that the engineered enzyme can produce a wide array of anilines with high yields and total turnover numbers (up to 99% yield and >4000 TTN), with water and boric acid as the only byproducts. We also demonstrate that the enzyme is effective with bench-stable boronic esters, which hydrolyze in situ to their corresponding boronic acids. Exploring the enzyme's capacity for enantioselective catalysis, we found that a racemic alkyl boronic ester affords an enantioenriched alkyl amine, a transformation not achieved with chemocatalysts. The formation of an exclusively unrearranged product during the amination of a boronic ester radical clock and the reaction's stereospecificity support a two-electron process akin to a 1,2-metallate shift mechanism. The developed transformation enables new biocatalytic routes for synthesizing chiral amines.
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Affiliation(s)
- Deirdre Hanley
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Zi-Qi Li
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Shilong Gao
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Scott C Virgil
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Frances H Arnold
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Edwin Alfonzo
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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2
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Kiyokawa K, Kawanaka K, Minakata S. Amino-λ 3 -iodane-Enabled Electrophilic Amination of Arylboronic Acid Derivatives. Angew Chem Int Ed Engl 2024; 63:e202319048. [PMID: 38272833 DOI: 10.1002/anie.202319048] [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: 12/11/2023] [Revised: 01/17/2024] [Accepted: 01/25/2024] [Indexed: 01/27/2024]
Abstract
In this report, we describe the use of amino-λ3 -iodanes in the electrophilic amination of arylboronic acids and boronates. Iodine(III) reagents with transferable amino groups, including one with an NH2 group, were synthesized and used in the amination, allowing the synthesis of a wide range of primary and secondary (hetero)arylamines. Mechanistic studies by DFT calculations indicate that the reaction proceeds through an electrophilic amination process from a tetravalent borate complex with a B-N dative bond.
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Affiliation(s)
- Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Kazuki Kawanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
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3
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Onnuch P, Ramagonolla K, Liu RY. Aminative Suzuki-Miyaura coupling. Science 2024; 383:1019-1024. [PMID: 38422125 DOI: 10.1126/science.adl5359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/05/2024] [Indexed: 03/02/2024]
Abstract
The Suzuki-Miyaura and Buchwald-Hartwig coupling reactions are widely used to form carbon-carbon (C-C) and carbon-nitrogen (C-N) bonds, respectively. We report the incorporation of a formal nitrene insertion process into the Suzuki-Miyaura reaction, altering the products from C-C-linked biaryls to C-N-C-linked diaryl amines and thereby joining the Suzuki-Miyaura and Buchwald-Hartwig coupling pathways to the same starting-material classes. A combination of a bulky ancillary phosphine ligand on palladium and a commercially available amination reagent enables efficient reactivity across aryl halides and pseudohalides, boronic acids and esters, and many functional groups and heterocycles. Mechanistic insights reveal flexibility on the order of bond-forming events, suggesting potential for expansion of the aminative cross-coupling concept to encompass diverse nucleophiles and electrophiles as well as four-component variants.
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Affiliation(s)
- Polpum Onnuch
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | | | - Richard Y Liu
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
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4
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Yadav P, Kumar P. External electric field, a potential catalyst for C-N cross-coupling reaction. Phys Chem Chem Phys 2023. [PMID: 38047469 DOI: 10.1039/d3cp04723g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The present work investigates the role of the external electric field (EEF) in boosting the C-N cross-coupling reaction between 2-chlorobenzoic acid and propylamine, by computing the reaction rates and energy barrier. The investigation suggests that the reaction can become barrierless by choosing an electric field in the appropriate direction, resulting in a quadrillionfold increase in the reaction rate in the presence of an EEF. We also found that the efficiency of the electric field depends on the dipole moment of the reactants, and hence, the results of the present work are general in nature and should be applicable to a variety of C-N cross-coupling reactions.
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Affiliation(s)
- Priyanka Yadav
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India.
| | - Pradeep Kumar
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India.
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5
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Urbiña-Alvarez J, Rincón-Carvajal S, Gamba-Sánchez D. Ammonia surrogates in the synthesis of primary amines. Org Biomol Chem 2023; 21:7036-7051. [PMID: 37575051 DOI: 10.1039/d3ob01202f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Primary amines are derivatives of ammonia in which one hydrogen atom is replaced by an alkyl or aryl group. Ammonia serves as the primary nitrogen source in amination reactions, and its utilization in solution or as a pure gas has witnessed notable advancements. However, the use of gaseous ammonia remains problematic in academic laboratory settings, while employing aqueous ammonia poses challenges in highly water-sensitive transformations. Consequently, the search for alternative sources of ammonia has garnered considerable attention among the organic chemistry community. This comprehensive literature review focuses on the use of ammonia surrogates in amination reactions, irrespective of the resulting intermediate. The review emphasizes the formation of the C-N bond and underscores the importance of generating intermediate products that can be readily transformed into primary amines through well-established reactions.
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Affiliation(s)
- Julia Urbiña-Alvarez
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de Los Andes, Cra 1 No. 18A-12 Q:305, Bogotá 111711, Colombia.
| | - Sergio Rincón-Carvajal
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de Los Andes, Cra 1 No. 18A-12 Q:305, Bogotá 111711, Colombia.
| | - Diego Gamba-Sánchez
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de Los Andes, Cra 1 No. 18A-12 Q:305, Bogotá 111711, Colombia.
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6
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Xie Q, Zhang R, Dong G. Programmable Amine Synthesis via Iterative Boron Homologation. Angew Chem Int Ed Engl 2023; 62:e202307118. [PMID: 37417916 DOI: 10.1002/anie.202307118] [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: 05/20/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/08/2023]
Abstract
The value of Matteson-type reactions has been increasingly recognized for developing automated organic synthesis. However, the typical Matteson reactions almost exclusively focus on homologation of carbon units. Here, we report the detailed development of sequential insertion of nitrogen and carbon atoms into boronate C-B bonds, which provides a modular and iterative approach to access functionalized tertiary amines. A new class of nitrenoid reagents is uncovered to allow direct formation of aminoboranes from aryl or alkyl boronates via N-insertion. The one-pot N-insertion followed by controlled mono- or double-carbenoid insertion has been realized with widely available aryl boronates. The resulting aminoalkyl boronate products can undergo further homologation and various other transformations. Preliminary success on homologation of N,N-dialkylaminoboranes and sequential N- and C-insertions with alkyl boronates have also been achieved. To broaden the synthetic utility, selective removal of a benzyl or aryl substituent permits access to secondary or primary amine products. The application of this method has been demonstrated in the modular synthesis of bioactive compounds and the programmable construction of diamines and aminoethers. A plausible reaction mechanism, supported by preliminary NMR (nuclear magnetic resonance) and computational studies, is also proposed.
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Affiliation(s)
- Qiqiang Xie
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave., Chicago, IL, 60637, USA
| | - Rui Zhang
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave., Chicago, IL, 60637, USA
| | - Guangbin Dong
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave., Chicago, IL, 60637, USA
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7
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Zhou Y, Ni J, Lyu Z, Li Y, Wang T, Cheng GJ. Mechanism and Reaction Channels of Iron-Catalyzed Primary Amination of Alkenes by Hydroxylamine Reagents. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yu Zhou
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Jie Ni
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
| | - Zhen Lyu
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
| | - Yang Li
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
| | - Ting Wang
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
| | - Gui-Juan Cheng
- Warshel Institute for Computational Biology and School of Life and Health Sciences, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Shenzhen 518172, China
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8
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Dodds AC, Puddu S, Sutherland A. Thioarylation of anilines using dual catalysis: two-step synthesis of phenothiazines. Org Biomol Chem 2022; 20:5602-5614. [PMID: 35796590 DOI: 10.1039/d2ob01082h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A two-step synthesis of phenothiazines has been developed using a dual-catalytic ortho-thioarylation reaction of anilines as the key step. Activation of N-(2-bromophenylthio)succinimide was achieved using the super Lewis acid, iron(III) triflimide and the Lewis base, diphenyl selenide, resulting in an accelerated and efficient ortho-thioarylation reaction of various protected aniline derivatives and less reactive, unprotected analogues. The thioarylated adducts were then cyclised to the desired phenothiazines using either an Ullmann-Goldberg or Buchwald-Hartwig coupling reaction. The dual catalytic thioarylation and copper(I)-catalysed cyclisation approach was used for the four-step synthesis of methopromazine, a neuroleptic agent with antipsychotic activity.
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Affiliation(s)
- Amy C Dodds
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK.
| | - Sabrina Puddu
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK.
| | - Andrew Sutherland
- School of Chemistry, The Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, UK.
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9
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Kumar P, Verma S, Rathi K, Chandra D, Verma VP, Jat JL. Metal‐Free Direct Transformation of Aryl Boronic Acid to Primary Amines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Puneet Kumar
- Babasaheb Bhimrao Ambedkar University School for Physical Sciences Chemistry INDIA
| | - Saumya Verma
- Babasaheb Bhimrao Ambedkar University School for Physical Sciences Chemistry INDIA
| | - Komal Rathi
- Banasthali Vidyapith: Banasthali University Chemistry INDIA
| | - Dinesh Chandra
- Babasaheb Bhimrao Ambedkar University School for Physical Sciences Chemistry INDIA
| | | | - Jawahar L. Jat
- Babasaheb Bhimrao Ambedkar University Chemistry Vidya ViharRaebareli Road226025 226025 Lucknow INDIA
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10
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Zhou Z, Kweon J, Jung H, Kim D, Seo S, Chang S. Photoinduced Transition-Metal-Free Chan-Evans-Lam-Type Coupling: Dual Photoexcitation Mode with Halide Anion Effect. J Am Chem Soc 2022; 144:9161-9171. [PMID: 35549253 DOI: 10.1021/jacs.2c03343] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herein, we report a photoinduced transition-metal-free C(aryl)-N bond formation between 2,4,6-tri(aryl)boroxines or arylboronic acids as an aryl source and 1,4,2-dioxazol-5-ones (dioxazolones) as an amide coupling partner. Chloride anion, either generated in situ by photodissociation of chlorinated solvent molecules or added separately as an additive, was found to play a critical cooperative role, thereby giving convenient access to a wide range of synthetically versatile N-arylamides under mild photo conditions. The synthetic virtue of this transition-metal-free Chan-Evans-Lam-type coupling was demonstrated by large-scale reactions, synthesis of 15N-labeled arylamides, and applicability toward biologically relevant compounds. On the basis of mechanistic investigations, two distinctive photoexcitations are proposed to function in the current process, in which the first excitation involving chloro-boron adduct facilitates the transition-metal-free activation of dioxazolones by single electron transfer (SET), and the second one enables the otherwise-inoperative 1,2-aryl migration of the thus-formed N-chloroamido-borate adduct.
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Affiliation(s)
- Zijun Zhou
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
| | - Jeonguk Kweon
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
| | - Hoimin Jung
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
| | - Sangwon Seo
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea.,Department of Chemistry, Korea Advanced Institute of Science & Technology (KAIST), Daejeon 34141, South Korea
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11
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Hong SY, Radosevich AT. Chemoselective Primary Amination of Aryl Boronic Acids by P III/P V═O-Catalysis: Synthetic Capture of the Transient Nef Intermediate HNO. J Am Chem Soc 2022; 144:8902-8907. [PMID: 35549268 DOI: 10.1021/jacs.2c02922] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic approach to intercept the transient HNO for a chemoselective primary amination of arylboronic acids is reported. A phosphetane-based catalyst operating within PIII/PV═O redox cycling is shown to capture HNO, generated in situ by Nef decomposition of 2-nitropropane, to selectively install the primary amino group at aryl Csp2 centers. The method furnishes versatile primary arylamines from arylboronic acid substrates with the preservation of otherwise reactive functional groups.
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Affiliation(s)
- Seung Youn Hong
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alexander T Radosevich
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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12
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Anugu RR, Falck JR. Site-selective amination and/or nitrilation via metal-free C(sp 2)-C(sp 3) cleavage of benzylic and allylic alcohols. Chem Sci 2022; 13:4821-4827. [PMID: 35655896 PMCID: PMC9067586 DOI: 10.1039/d2sc00758d] [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: 02/07/2022] [Accepted: 04/04/2022] [Indexed: 11/21/2022] Open
Abstract
Benzylic/allylic alcohols are converted via site-selective C(sp2)-C(sp3) cleavage to value-added nitrogenous motifs, viz., anilines and/or nitriles as well as N-heterocycles, utilizing commercial hydroxylamine-O-sulfonic acid (HOSA) and Et3N in an operationally simple, one-pot process. Notably, cyclic benzylic/allylic alcohols undergo bis-functionalization with attendant increases in architectural complexity and step-economy.
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Affiliation(s)
- Raghunath Reddy Anugu
- Chemistry Division, Biochemistry Dept., Pharmacology Dept., University of Texas Southwestern Medical Center Dallas TX 75390 USA
| | - John R Falck
- Chemistry Division, Biochemistry Dept., Pharmacology Dept., University of Texas Southwestern Medical Center Dallas TX 75390 USA
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13
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Zhang F, Zhou L, Yang K, Song Q. Recent Progress on 1,2-Metallate Shift Reactions Based on Tetracoordinate Boron Intermediates. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202110017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Cho J, Sadu VS, Han Y, Bae Y, Lee H, Lee KI. Structural Requirements of 1-(2-Pyridinyl)-5-pyrazolones for Disproportionation of Boronic Acids. Molecules 2021; 26:molecules26226814. [PMID: 34833904 PMCID: PMC8623043 DOI: 10.3390/molecules26226814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/02/2021] [Accepted: 11/06/2021] [Indexed: 11/16/2022] Open
Abstract
We observed an unusual formation of four-coordinate boron(III) complexes from the reaction of 1-(2-pyridinyl)-5-pyrazolone derivatives with arylboronic acids in the basic media. The exact mechanism is not clear; however, the use of unprotected boronic acid and the presence of a bidentate ligand appeared to be the key structural requirements for the transformation. The results suggest that base-promoted disproportionation of arylboronic acid with the assistance of the [N,O]-bidentate ligation of 1-(2-pyridinyl)-5-pyrazolone should take place and facilitate the formation of pyrazole diarylborinate. Experiments to obtain a deeper understanding of its mechanism are currently underway.
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Affiliation(s)
- Joungmo Cho
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
| | - Venkata Subbaiah Sadu
- R&D Center, Molecules & Materials Co., Ltd., B-219 Daeduck BIZ Center, Daejeon 34013, Korea;
| | - Yohan Han
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
| | - Yunsoo Bae
- Department of Life Science, Ewha Womans University, Seoul 03760, Korea;
| | - Hwajeong Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea;
| | - Kee-In Lee
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
- R&D Center, Molecules & Materials Co., Ltd., B-219 Daeduck BIZ Center, Daejeon 34013, Korea;
- Correspondence:
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15
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Prasad S, Rodene DD, Burkholder MB, Donald KJ, Gupton BF. Substituent Effects and the Energetics of Noncatalyzed Aryl Halide Aminations: A Theoretical Investigation. ACS OMEGA 2021; 6:27216-27224. [PMID: 34693141 PMCID: PMC8529657 DOI: 10.1021/acsomega.1c03934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
We report the influence of substituents and physical conditions on activation energies for the noncatalyzed amination (C-N cross-coupling reactions) of aryl halides. We uncover a significant correlation between the barrier heights of the C-N bond formation and Hammett σ parameters-a formal measure of the electron-withdrawing or -donating ability of substituents on the aryl halides. Our results indicate that such correlations are useful predictive tools for the amination of aryl halides over a wide range of substituent types. From 54 cases studied (six substituents occupying specific positions relative to halogen atoms), the 2-COOHPhI + NH2 n Pr amination reaction is predicted to possess the lowest noncatalyzed activation free energy (135.6 kJ mol-1) using the B3LYP method. The lower barriers for the 2-COOHPhX (for X = Cl, Br, and I) compounds are shown to originate from collusion between steric and electronic effects-specifically, the momentary formation of a hydrogen bond between an oxygen site on the ortho-COOH and the lone pair of the entering amine. Internal reaction coordinate (IRC) path calculations afforded us these and other key insights into the nature of the reactions. The control exerted by substituents on the arrangement of the transition state structure, as well as the sensitivity of the reaction barriers to temperature and solvent polarity, are discussed. These results offer new perspectives from which to assess the nature of the C-N bond formation and suggest new avenues for future exploration, especially in progress toward the metal-free amination of aryl compounds.
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Affiliation(s)
- Supreeth Prasad
- Department
of Chemistry, University of California—Davis, Davis, California 95616, United States
| | - Dylan D. Rodene
- Department
of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Michael B. Burkholder
- Department
of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Kelling J. Donald
- Department
of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
| | - B. Frank Gupton
- Department
of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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16
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Holsten M, Feierabend S, Elbert SM, Rominger F, Oeser T, Mastalerz M. Soluble Congeners of Prior Insoluble Shape-Persistent Imine Cages. Chemistry 2021; 27:9383-9390. [PMID: 33848032 PMCID: PMC8362185 DOI: 10.1002/chem.202100666] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Indexed: 12/12/2022]
Abstract
One of the most applied reaction types to synthesize shape‐persistent organic cage compounds is the imine condensation reaction and it is assumed that the formed cages are thermodynamically controlled products due to the reversibility of the imine condensation. However, most of the synthesized imine cages reported are formed as precipitate from the reaction mixture and therefore rather may be kinetically controlled products. There are even examples in literature, where resulting cages are not soluble at all in common organic solvents to characterize or study their formation by NMR spectroscopy in solution. Here, a triptycene triamine containing three solubilizing n‐hexyloxy chains has been used to synthesize soluble congeners of prior insoluble cages. This allowed us to study the formation as well as the reversibility of cage formation in solution by investigating exchange of building blocks between the cages and deuterated derivatives thereof.
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Affiliation(s)
- Mattes Holsten
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Sarah Feierabend
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Sven M Elbert
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Thomas Oeser
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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17
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Florentino L, López L, Barroso R, Cabal M, Valdés C. Synthesis of Pyrrolidines by a Csp
3
‐Csp
3
/Csp
3
‐
N
Transition‐Metal‐Free Domino Reaction of Boronic Acids with γ‐Azido‐
N
‐Tosylhydrazones. Angew Chem Int Ed Engl 2020; 60:1273-1280. [DOI: 10.1002/anie.202010528] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/29/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Lucía Florentino
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Lucía López
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Raquel Barroso
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - María‐Paz Cabal
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
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18
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Florentino L, López L, Barroso R, Cabal M, Valdés C. Synthesis of Pyrrolidines by a Csp
3
‐Csp
3
/Csp
3
‐
N
Transition‐Metal‐Free Domino Reaction of Boronic Acids with γ‐Azido‐
N
‐Tosylhydrazones. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010528] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Lucía Florentino
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Lucía López
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Raquel Barroso
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - María‐Paz Cabal
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica Instituto de Química Organometálica “Enrique Moles” Universidad de Oviedo C/ Julián Clavería 8 33006 Oviedo Spain
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19
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Yang J, Horst M, Werby SH, Cegelski L, Burns NZ, Xia Y. Bicyclohexene- peri-naphthalenes: Scalable Synthesis, Diverse Functionalization, Efficient Polymerization, and Facile Mechanoactivation of Their Polymers. J Am Chem Soc 2020; 142:14619-14626. [PMID: 32786795 DOI: 10.1021/jacs.0c06454] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pursuing polymers that can transform from a nonconjugated to a conjugated state under mechanical stress to significantly change their properties, we developed a new generation of ladder-type mechanophore monomers, bicyclo[2.2.0]hex-5-ene-peri-naphthalene (BCH-Naph), that can be directly and efficiently polymerized by ring-opening metathesis polymerization (ROMP). BCH-Naphs can be synthesized in multigram quantities and functionalized with a wide range of electron-rich and electron-poor substituents, allowing tuning of the optoelectronic and physical properties of mechanically generated conjugated polymers. Efficient ROMP of BCH-Naphs yielded ultrahigh molecular weight polymechanophores with controlled MWs and low dispersity. The resulting poly(BCH-Naph)s can be mechanically activated into conjugated polymers using ultrasonication, grinding, and even simple stirring of the dilute solutions, leading to changes in absorption and fluorescence. Poly(BCH-Naph)s represent an attractive polymechanophore system to explore multifaceted mechanical response in solution and solid states, owing to the synthetic scalability, functional diversity, efficient polymerization, and facile mechanoactivation.
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Affiliation(s)
- Jinghui Yang
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Matias Horst
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Sabrina H Werby
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Lynette Cegelski
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Noah Z Burns
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yan Xia
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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20
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George N, Ofori S, Parkin S, Awuah SG. Mild deprotection of the N- tert-butyloxycarbonyl ( N-Boc) group using oxalyl chloride. RSC Adv 2020; 10:24017-24026. [PMID: 33456769 PMCID: PMC7810210 DOI: 10.1039/d0ra04110f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We report a mild method for the selective deprotection of the N-Boc group from a structurally diverse set of compounds, encompassing aliphatic, aromatic, and heterocyclic substrates by using oxalyl chloride in methanol. The reactions take place under room temperature conditions for 1–4 h with yields up to 90%. This mild procedure was applied to a hybrid, medicinally active compound FC1, which is a novel dual inhibitor of IDO1 and DNA Pol gamma. A broader mechanism involving the electrophilic character of oxalyl chloride is postulated for this deprotection strategy. We report a mild method for the selective deprotection of the N-Boc group from a structurally diverse set of compounds, encompassing aliphatic, aromatic, and heterocyclic substrates by using oxalyl chloride in methanol.![]()
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Affiliation(s)
- Nathaniel George
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Samuel Ofori
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Samuel G Awuah
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
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21
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Li G, Nykaza TV, Cooper JC, Ramirez A, Luzung MR, Radosevich AT. An Improved P III/P V═O-Catalyzed Reductive C-N Coupling of Nitroaromatics and Boronic Acids by Mechanistic Differentiation of Rate- and Product-Determining Steps. J Am Chem Soc 2020; 142:6786-6799. [PMID: 32178514 PMCID: PMC7146866 DOI: 10.1021/jacs.0c01666] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
Experimental,
spectroscopic, and computational studies are reported
that provide an evidence-based mechanistic description of an intermolecular
reductive C–N coupling of nitroarenes and arylboronic acids
catalyzed by a redox-active main-group catalyst (1,2,2,3,4,4-hexamethylphosphetane P-oxide, i.e., 1·[O]). The central observations
include the following: (1) catalytic reduction of 1·[O]
to PIII phosphetane 1 is kinetically fast
under conditions of catalysis; (2) phosphetane 1 represents
the catalytic resting state as observed by 31P NMR spectroscopy;
(3) there are no long-lived nitroarene partial-reduction intermediates
observable by 15N NMR spectroscopy; (4) the reaction is
sensitive to solvent dielectric, performing best in moderately polar
solvents (viz. cyclopentylmethyl ether); and (5) the reaction is largely
insensitive with respect to common hydrosilane reductants. On the
basis of the foregoing studies, new modified catalytic conditions
are described that expand the reaction scope and provide for mild
temperatures (T ≥ 60 °C), low catalyst
loadings (≥2 mol%), and innocuous terminal reductants (polymethylhydrosiloxane).
DFT calculations define a two-stage deoxygenation sequence for the
reductive C–N coupling. The initial deoxygenation involves
a rate-determining step that consists of a (3+1) cheletropic addition
between the nitroarene substrate and phosphetane 1; energy
decomposition techniques highlight the biphilic character of the phosphetane
in this step. Although kinetically invisible, the second deoxygenation
stage is implicated as the critical C–N product-forming event,
in which a postulated oxazaphosphirane intermediate is diverted from
arylnitrene dissociation toward heterolytic ring opening with the
arylboronic acid; the resulting dipolar intermediate evolves by antiperiplanar
1,2-migration of the organoboron residue to nitrogen, resulting in
displacement of 1·[O] and formation of the target
C–N coupling product upon in situ hydrolysis.
The method thus described constitutes a mechanistically well-defined
and operationally robust main-group complement to the current workhorse
transition-metal-based methods for catalytic intermolecular C–N
coupling.
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Affiliation(s)
- Gen Li
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Trevor V Nykaza
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Julian C Cooper
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Antonio Ramirez
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Michael R Luzung
- Chemical and Synthetic Development, Bristol-Myers Squibb Company, One Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Alexander T Radosevich
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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22
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Biswal P, Pati BV, Chebolu R, Ghosh A, Ravikumar PC. Hydroxylamine-O
-Sulfonic Acid (HOSA) as a Redox-Neutral Directing Group: Rhodium Catalyzed, Additive Free, One-Pot Synthesis of Isoquinolines from Arylketones. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901825] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Pragati Biswal
- School of Chemical Sciences; National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI; 752050 Jatani Khurda Odisha India
| | - Bedadyuti Vedvyas Pati
- School of Chemical Sciences; National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI; 752050 Jatani Khurda Odisha India
| | - Rajesh Chebolu
- School of Chemical Sciences; National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI; 752050 Jatani Khurda Odisha India
| | - Asit Ghosh
- School of Chemical Sciences; National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI; 752050 Jatani Khurda Odisha India
| | - P. C. Ravikumar
- School of Chemical Sciences; National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI; 752050 Jatani Khurda Odisha India
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23
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Liu X, Zhu Q, Chen D, Wang L, Jin L, Liu C. Aminoazanium of DABCO: An Amination Reagent for Alkyl and Aryl Pinacol Boronates. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201913388] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xingxing Liu
- College of Chemical EngineeringZhejiang University of Technology Hangzhou 310014 P. R. China
- State Key Laboratory for Oxo Synthesis and Selective OxidationSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Qing Zhu
- State Key Laboratory for Oxo Synthesis and Selective OxidationSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Du Chen
- State Key Laboratory for Oxo Synthesis and Selective OxidationSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Lu Wang
- State Key Laboratory for Oxo Synthesis and Selective OxidationSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Liqun Jin
- College of Chemical EngineeringZhejiang University of Technology Hangzhou 310014 P. R. China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective OxidationSuzhou Research InstituteLanzhou Institute of Chemical PhysicsChinese Academy of Sciences Lanzhou 730000 P. R. China
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal University Hangzhou 311121 P. R. China
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24
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Liu X, Zhu Q, Chen D, Wang L, Jin L, Liu C. Aminoazanium of DABCO: An Amination Reagent for Alkyl and Aryl Pinacol Boronates. Angew Chem Int Ed Engl 2020; 59:2745-2749. [PMID: 31814182 DOI: 10.1002/anie.201913388] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Indexed: 01/21/2023]
Abstract
The aminoazanium of DABCO (H2 N-DABCO) has been developed as a general and practical amination reagent for the direct amination of alkyl and aryl pinacol boronates. This compound is stable and practical for use as a reagent. Various primary, secondary. and tertiary alkyl-Bpin and aryl-Bpin substrates were aminated to give the corresponding amine derivatives. The amination is stereospecific. The anti-Markovnikov hydroamination of olefins was easily achieved by catalytic hydroboration with HBpin and in subsequent situ amination using H2 N-DABCO. Moreover, the combination of 1,2-diboration of olefins, using B2 pin2 , with this amination process achieved the unprecedented 1,2-diamination of olefins. The amination protocol was also successfully extended to aryl pinacol boronates.
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Affiliation(s)
- Xingxing Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Qing Zhu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Du Chen
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Lu Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
| | - Liqun Jin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China.,Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China
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25
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Roscales S, Csáky AG. How to make C–N bonds using boronic acids and their derivatives without transition metals. Chem Soc Rev 2020; 49:5159-5177. [DOI: 10.1039/c9cs00735k] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
No need for transition-metal catalysis in amination, amidation, nitration or nitrosation reactions with boron derivatives as reagents.
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Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- 28040 Madrid
- Spain
| | - Aurelio G. Csáky
- Instituto Pluridisciplinar
- Universidad Complutense de Madrid
- 28040 Madrid
- Spain
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26
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Lardy SW, Luong KC, Schmidt VA. Formal Aniline Synthesis from Phenols through Deoxygenative N‐Centered Radical Substitution. Chemistry 2019; 25:15267-15271. [DOI: 10.1002/chem.201904288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Samuel W. Lardy
- Department of Chemistry and BiochemistryUniversity of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Kristine C. Luong
- Department of Chemistry and BiochemistryUniversity of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA
| | - Valerie A. Schmidt
- Department of Chemistry and BiochemistryUniversity of California San Diego 9500 Gilman Drive La Jolla CA 92093 USA
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27
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Wang YW, Zheng L, Jia FC, Chen YF, Wu AX. Oxidative ring-opening of isatins for the synthesis of 2-aminobenzamides and 2-aminobenzoates. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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28
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Hellerstedt J, Cahlík A, Stetsovych O, Švec M, Shimizu TK, Mutombo P, Klívar J, Stará IG, Jelínek P, Starý I. Aromatic Azide Transformation on the Ag(111) Surface Studied by Scanning Probe Microscopy. Angew Chem Int Ed Engl 2019; 58:2266-2271. [DOI: 10.1002/anie.201812334] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Jack Hellerstedt
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
| | - Aleš Cahlík
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and MaterialsFaculty of SciencePalacký University Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Oleksander Stetsovych
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
- National Institute for Materials Science (NIMS) 1-2-1 Sengen Tsukuba 305-0047 Japan
| | - Martin Švec
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and MaterialsFaculty of SciencePalacký University Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Tomoko K. Shimizu
- National Institute for Materials Science (NIMS) 1-2-1 Sengen Tsukuba 305-0047 Japan
| | - Pingo Mutombo
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
| | - Jiří Klívar
- Institute of Organic Chemistry and BiochemistryAcademy of Sciences of the Czech Republic Flemingovo nám. 2 16610 Prague 6 Czech Republic
| | - Irena G. Stará
- Institute of Organic Chemistry and BiochemistryAcademy of Sciences of the Czech Republic Flemingovo nám. 2 16610 Prague 6 Czech Republic
| | - Pavel Jelínek
- Institute of PhysicsAcademy of Sciences of the Czech Republic Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and MaterialsFaculty of SciencePalacký University Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Ivo Starý
- Institute of Organic Chemistry and BiochemistryAcademy of Sciences of the Czech Republic Flemingovo nám. 2 16610 Prague 6 Czech Republic
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29
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Yang Q, Yang Z, Tan Y, Zhao J, Sun Q, Zhang H, Zhang Y. Direct C(
sp
2
)−H Amination to Synthesize Primary 3‐aminoquinoxalin‐2(1
H
)‐ones under Simple and Mild Conditions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801661] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Qiming Yang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Zibing Yang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Yushi Tan
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Qian Sun
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Hong‐Yu Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy SavingHebei University of Technology Tianjin 300130 People's Republic of China
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30
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Hellerstedt J, Cahlík A, Stetsovych O, Švec M, Shimizu TK, Mutombo P, Klívar J, Stará IG, Jelínek P, Starý I. Aromatic Azide Transformation on the Ag(111) Surface Studied by Scanning Probe Microscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jack Hellerstedt
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
| | - Aleš Cahlík
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and Materials; Faculty of Science; Palacký University; Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Oleksander Stetsovych
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
- National Institute for Materials Science (NIMS); 1-2-1 Sengen Tsukuba 305-0047 Japan
| | - Martin Švec
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and Materials; Faculty of Science; Palacký University; Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Tomoko K. Shimizu
- National Institute for Materials Science (NIMS); 1-2-1 Sengen Tsukuba 305-0047 Japan
| | - Pingo Mutombo
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
| | - Jiří Klívar
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nám. 2 16610 Prague 6 Czech Republic
| | - Irena G. Stará
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nám. 2 16610 Prague 6 Czech Republic
| | - Pavel Jelínek
- Institute of Physics; Academy of Sciences of the Czech Republic; Cukrovarnická 10 16200 Prague 6 Czech Republic
- Regional Centre of Advanced Technologies and Materials; Faculty of Science; Palacký University; Šlechtitelû 27 78371 Olomouc Czech Republic
| | - Ivo Starý
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; Flemingovo nám. 2 16610 Prague 6 Czech Republic
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31
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Liu Y, Chen L, Wang Z, Liu P, Liu Y, Dai B. Cascade Reaction of Arylboronic Acids and 2′-Cyano-biaryl-2-aldehyde N-Tosylhydrazones: Access to Functionalized 9-Amino-10-arylphenanthrenes. J Org Chem 2018; 84:204-215. [DOI: 10.1021/acs.joc.8b02605] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yueqiang Liu
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
| | - Lingjuan Chen
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
| | - Zhong Wang
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
| | - Ping Liu
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
| | - Yan Liu
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
| | - Bin Dai
- School of Chemistry and Chemical Engineering, the Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi City, 832004, China
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32
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Li Y, Huang S, Liao C, Shao Y, Chen L. Transition-metal-free access to 2-aminopyridine derivatives from 2-fluoropyridine and acetamidine hydrochloride. Org Biomol Chem 2018; 16:7564-7567. [PMID: 30288539 DOI: 10.1039/c8ob02129e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Under catalyst-free conditions, an efficient method for the synthesis of 2-aminopyridine derivatives through the nucleophilic substitution and hydrolysis of 2-fluoropyridine and acetamidine hydrochloride has been developed. This amination uses inexpensive acetamidine hydrochloride as the ammonia source and has the advantages of a high yield, high chemoselectivity and wide substrate adaptability. The results suggest that other N-heterocycles containing fluorine substituents can also complete the reaction via these reaction conditions and yield the target products.
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Affiliation(s)
- Yibiao Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Shuo Huang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Chunshu Liao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Yan Shao
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
| | - Lu Chen
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong Province 529090, China.
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33
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Bao J, Kuik D, Tranmer GK. An efficient one-pot synthesis of N,N′-disubstituted phenylureas and N-aryl carbamates using hydroxylamine-O-sulfonic acid. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Wagner P, Rominger F, Mastalerz M. Switching the Statistical C
3
/C
1
Ratio in the Threefold Aromatic Substitution of Tribenzotriquinacenes towards the C
3
Isomer. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806332] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Philippe Wagner
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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35
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Wagner P, Rominger F, Mastalerz M. Switching the Statistical C 3 /C 1 Ratio in the Threefold Aromatic Substitution of Tribenzotriquinacenes towards the C 3 Isomer. Angew Chem Int Ed Engl 2018; 57:11321-11324. [PMID: 29938890 DOI: 10.1002/anie.201806332] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 12/21/2022]
Abstract
Tribenzotriquinacene (TBTQ) is a bowl-shaped molecule that has been widely used as a molecular building block in supramolecular and materials chemistry. Especially C3 -symmetric threefold-substituted TBTQs are interesting for these purposes. Until now a general and selective synthetic approach to those C3 -symmetric products was lacking, mainly because the typically used electrophilic aromatic substitution reactions of the parent TBTQ hydrocarbons produce predominantly the C1 isomer over the C3 isomer (3:1 statistical ratio). Herein we introduce a threefold borylation of TBTQ with the C3 isomer as the main product (2.6:1 C3 /C1 ratio). The borylated TBTQ can be converted in good yields into other C3 -symmetric TBTQs, thus allowing straightforward synthetic access to new building blocks for supramolecular and materials chemistry.
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Affiliation(s)
- Philippe Wagner
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Michael Mastalerz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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36
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Edelstein EK, Grote AC, Palkowitz MD, Morken JP. A Protocol for Direct Stereospecific Amination of Primary, Secondary, and Tertiary Alkylboronic Esters. Synlett 2018; 29:1749-1752. [PMID: 30631220 DOI: 10.1055/s-0037-1610172] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The direct, stereospecific amination of alkylboronic and borinic esters can be conducted by treatment of the organoboron compound with methoxyamine and potassium tert-butoxide. In addition to being stereospecific, this process also enables the direct amination of tertiary boronic esters in an efficient fashion.
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Affiliation(s)
- Emma K Edelstein
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467
| | - Andrea C Grote
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467
| | | | - James P Morken
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467
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37
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Sun HB, Gong L, Tian YB, Wu JG, Zhang X, Liu J, Fu Z, Niu D. Metal- and Base-Free Room-Temperature Amination of Organoboronic Acids with N
-Alkyl Hydroxylamines. Angew Chem Int Ed Engl 2018; 57:9456-9460. [PMID: 29736974 DOI: 10.1002/anie.201802782] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Indexed: 02/05/2023]
Affiliation(s)
- Hong-Bao Sun
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Liang Gong
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Yu-Biao Tian
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jin-Gui Wu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Zhengyan Fu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Dawen Niu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
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38
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Sun HB, Gong L, Tian YB, Wu JG, Zhang X, Liu J, Fu Z, Niu D. Metal- and Base-Free Room-Temperature Amination of Organoboronic Acids with N
-Alkyl Hydroxylamines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802782] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Hong-Bao Sun
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Liang Gong
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Yu-Biao Tian
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jin-Gui Wu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Zhengyan Fu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Dawen Niu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital
- School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
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39
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Georgiádes Á, Ötvös SB, Fülöp F. Controlled Transformations of Aryl Halides in a Flow System: Selective Synthesis of Aryl Azides and Aniline Derivatives. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701539] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ádám Georgiádes
- Institute of Pharmaceutical Chemistry; University of Szeged; Eötvös u. 6, H- 6720 Szeged Hungary
| | - Sándor B. Ötvös
- Institute of Pharmaceutical Chemistry; University of Szeged; Eötvös u. 6, H- 6720 Szeged Hungary
- MTA-SZTE Stereochemistry Research Group; Hungarian Academy of Sciences; Eötvös u. 6, H- 6720 Szeged Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry; University of Szeged; Eötvös u. 6, H- 6720 Szeged Hungary
- MTA-SZTE Stereochemistry Research Group; Hungarian Academy of Sciences; Eötvös u. 6, H- 6720 Szeged Hungary
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40
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Yan Z, Xie HP, Shen HQ, Zhou YG. Ruthenium-Catalyzed Hydrogenation of Carbocyclic Aromatic Amines: Access to Chiral Exocyclic Amines. Org Lett 2018; 20:1094-1097. [DOI: 10.1021/acs.orglett.7b04060] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong Yan
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Huan-Ping Xie
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Hong-Qiang Shen
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
| | - Yong-Gui Zhou
- State
Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, People’s Republic of China
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41
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Sabir S, Kumar G, Jat JL. O-Substituted hydroxyl amine reagents: an overview of recent synthetic advances. Org Biomol Chem 2018; 16:3314-3327. [DOI: 10.1039/c8ob00146d] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reagents derived from oxygen-substituted hydroxylamine facilitate stereo- and regioselective C–N, N–N, O–N, and S–N bond-formation reactions and intra-molecular cyclizations without any expensive metal catalysts. These remarkable transformations are discussed in this review.
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Affiliation(s)
- Shekh Sabir
- Department of Chemistry
- Baba Saheb Bhimrao Ambedkar University (a Central University)
- Vidya Vihar
- Lucknow 226025
- India
| | | | - Jawahar L. Jat
- Department of Chemistry
- Baba Saheb Bhimrao Ambedkar University (a Central University)
- Vidya Vihar
- Lucknow 226025
- India
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42
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Hellou N, Macé A, Martin C, Dorcet V, Roisnel T, Jean M, Vanthuyne N, Berrée F, Carboni B, Crassous J. Synthesis of Carbo[6]helicene Derivatives Grafted with Amino or Aminoester Substituents from Enantiopure [6]Helicenyl Boronates. J Org Chem 2017; 83:484-490. [PMID: 29224347 DOI: 10.1021/acs.joc.7b02619] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Enantiopure carbo[6]helicenyl boronates were synthesized using a photocyclization reaction as the key step. These compounds were further converted to various amino derivatives using copper-catalyzed azidation or amination and reductive alkylation of benzylazide by a helicenyl dichloroborane. Asymmetric Petasis condensation with glyoxylic acid and morpholine controlled by the helical chirality afforded the corresponding amino esters.
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Affiliation(s)
- Nora Hellou
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Aurélie Macé
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Clothilde Martin
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Vincent Dorcet
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Thierry Roisnel
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Marion Jean
- CNRS, Centrale Marseille, iSm2, Aix Marseille Univ , Marseille, France
| | - Nicolas Vanthuyne
- CNRS, Centrale Marseille, iSm2, Aix Marseille Univ , Marseille, France
| | - Fabienne Berrée
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Bertrand Carboni
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
| | - Jeanne Crassous
- Univ Rennes, CNRS, ISCR [(Institut des Sciences Chimiques de Rennes)] - UMR 6226 , F-35000, Rennes, France
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43
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Nicolle SM, Nortcliffe A, Bartrum HE, Lewis W, Hayes CJ, Moody CJ. C−H Insertion as a Key Step to Spiro-Oxetanes, Scaffolds for Drug Discovery. Chemistry 2017; 23:13623-13627. [DOI: 10.1002/chem.201703746] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Simon M. Nicolle
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Andrew Nortcliffe
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Hannah E. Bartrum
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - William Lewis
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Hayes
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
| | - Christopher J. Moody
- School of Chemistry; University of Nottingham; University Park Nottingham NG7 2RD United Kingdom
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44
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Merz J, Fink J, Friedrich A, Krummenacher I, Al Mamari HH, Lorenzen S, Haehnel M, Eichhorn A, Moos M, Holzapfel M, Braunschweig H, Lambert C, Steffen A, Ji L, Marder TB. Pyrene Molecular Orbital Shuffle-Controlling Excited State and Redox Properties by Changing the Nature of the Frontier Orbitals. Chemistry 2017; 23:13164-13180. [PMID: 28718975 DOI: 10.1002/chem.201702594] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Indexed: 01/01/2023]
Abstract
We show that by judicious choice of substituents at the 2- and 7-positions of pyrene, the frontier orbital order of pyrene can be modified, giving enhanced control over the nature and properties of the photoexcited states and the redox potentials. Specifically, we introduced a julolidine-like moiety and Bmes2 (mes=2,4,6-Me3 C6 H2 ) as very strong donor (D) and acceptor (A), respectively, giving 2,7-D-π-D- and unsymmetric 2,7-D-π-A-pyrene derivatives, in which the donor destabilizes the HOMO-1 and the acceptor stabilizes the LUMO+1 of the pyrene core. Consequently, for 2,7-substituted pyrene derivatives, unusual properties are obtained. For example, very large bathochromic shifts were observed for all of our compounds, and unprecedented green light emission occurs for the D/D system. In addition, very high radiative rate constants in solution and in the solid state were recorded for the D-π-D- and D-π-A-substituted compounds. All compounds show reversible one-electron oxidations, and Jul2 Pyr exhibits a second oxidation, with the largest potential splitting (ΔE=440 mV) thus far reported for 2,7-substituted pyrenes. Spectroelectrochemical measurements confirm an unexpectedly strong coupling between the 2,7-substituents in our pyrene derivatives.
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Affiliation(s)
- Julia Merz
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Julian Fink
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Hamad H Al Mamari
- Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36, Al Khoud, 123, Muscat, Sultanate of Oman
| | - Sabine Lorenzen
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Martin Haehnel
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Antonius Eichhorn
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Michael Moos
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marco Holzapfel
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Lambert
- Institut für Organische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Andreas Steffen
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Lei Ji
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry, & Catalysis with Boron (ICB), Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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45
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Ganesh V, Odachowski M, Aggarwal VK. Alkynyl Moiety for Triggering 1,2-Metallate Shifts: Enantiospecific sp 2 -sp 3 Coupling of Boronic Esters with p-Arylacetylenes. Angew Chem Int Ed Engl 2017; 56:9752-9756. [PMID: 28618129 PMCID: PMC5577510 DOI: 10.1002/anie.201703894] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 06/08/2017] [Indexed: 11/25/2022]
Abstract
The enantiospecific coupling of secondary and tertiary boronic esters to aromatics has been investigated. Using p‐lithiated phenylacetylenes and a range of boronic esters coupling has been achieved by the addition of N‐bromosuccinimide (NBS). The alkyne functionality of the intermediate boronate complex reacts with NBS triggering the 1,2‐migration of the group on boron to carbon giving a dearomatized bromoallene intermediate. At this point elimination and rearomatization occurs with neopentyl boronic esters, giving the coupled products. However, using pinacol boronic esters, the boron moiety migrates to the adjacent carbon resulting in formation of ortho boron‐incorporated coupled products. The synthetic utility of the boron incorporated product has been demonstrated by orthogonal transformation of both the alkyne and boronic ester functionalities.
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46
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Ma Z, Zhou Z, Kürti L. Direct and Stereospecific Synthesis of N-H and N-Alkyl Aziridines from Unactivated Olefins Using Hydroxylamine-O-Sulfonic Acids. Angew Chem Int Ed Engl 2017; 56:9886-9890. [PMID: 28614619 PMCID: PMC5727000 DOI: 10.1002/anie.201705530] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Indexed: 11/08/2022]
Abstract
A RhII -catalyzed direct and stereospecific N-H- and N-alkyl aziridination of olefins is reported that uses hydroxylamine-O-sulfonic acids as inexpensive, readily available, and nitro group-free aminating reagents. Unactivated olefins, featuring a wide range of functional groups, are converted into the corresponding N-H or N-alkyl aziridines in good to excellent yields. This operationally simple, scalable transformation proceeds efficiently at ambient temperature and is tolerant towards oxygen and trace moisture.
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Affiliation(s)
- Zhiwei Ma
- Department of Chemistry, Rice University, BioScience Research Collaborative, 6500 Main Street, Rm 380, Houston, TX, 77030, USA
| | - Zhe Zhou
- Department of Chemistry, Rice University, BioScience Research Collaborative, 6500 Main Street, Rm 380, Houston, TX, 77030, USA
| | - László Kürti
- Department of Chemistry, Rice University, BioScience Research Collaborative, 6500 Main Street, Rm 380, Houston, TX, 77030, USA
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47
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Ganesh V, Odachowski M, Aggarwal VK. Alkynyl Moiety for Triggering 1,2‐Metallate Shifts: Enantiospecific sp
2
–sp
3
Coupling of Boronic Esters with
p
‐Arylacetylenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703894] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Ma Z, Zhou Z, Kürti L. Direct and Stereospecific Synthesis of
N
‐H and
N
‐Alkyl Aziridines from Unactivated Olefins Using Hydroxylamine‐
O
‐Sulfonic Acids. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705530] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zhiwei Ma
- Department of Chemistry Rice University BioScience Research Collaborative 6500 Main Street, Rm 380 Houston TX 77030 USA
| | - Zhe Zhou
- Department of Chemistry Rice University BioScience Research Collaborative 6500 Main Street, Rm 380 Houston TX 77030 USA
| | - László Kürti
- Department of Chemistry Rice University BioScience Research Collaborative 6500 Main Street, Rm 380 Houston TX 77030 USA
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49
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Furukawa T, Tobisu M, Chatani N. C–H Borylation by Platinum Catalysis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160391] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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50
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Liu J, Wu K, Shen T, Liang Y, Zou M, Zhu Y, Li X, Li X, Jiao N. Fe-Catalyzed Amination of (Hetero)Arenes with a Redox-Active Aminating Reagent under Mild Conditions. Chemistry 2016; 23:563-567. [DOI: 10.1002/chem.201605476] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 11/23/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Jianzhong Liu
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Kai Wu
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Tao Shen
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Yujie Liang
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Miancheng Zou
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Yuchao Zhu
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Xinwei Li
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Xinyao Li
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs; School of Pharmaceutical Sciences Peking University; Xue Yuan Rd. 38 Beijing 100191 P. R. China
- State Key Laboratory of Organometallic Chemistry; Chinese Academy of Sciences; Shanghai 200032 P. R. China
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