1
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Paul S, Panda S. Synthesis of Boronic Esters from Organometallic Reagents and Bis(pinacolato)diboron. Chem Asian J 2024; 19:e202300911. [PMID: 38131458 DOI: 10.1002/asia.202300911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 12/04/2023] [Accepted: 12/20/2023] [Indexed: 12/23/2023]
Abstract
Synthesis of alkyl, aryl, and vinyl boronic esters carrying various chiral and achiral diol-protecting groups were synthesized starting from the corresponding alkyl, aryl, and vinyl lithium or Grignard reagents. Good to excellent yields were obtained for a large range of substrates. The reaction can be conducted in a gram scale to obtain the product over 80 % yield. This approach provides direct access to neopentyl, pinene, and other boronic esters that are difficult to achieve. Using trimethoxyborane or 2-isopropoxy pinacolboronic ester. Detailed mechanistic studies have been conducted to understand the mechanism behind the formation of boronic ester starting from organometallic reagents.
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Affiliation(s)
- Swagata Paul
- Indian Institute of Technology, Kharagpur, 721302, India
| | - Santanu Panda
- Indian Institute of Technology, Kharagpur, 721302, India
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2
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Manna S, Paul S, Kong WY, Aich D, Sahoo R, Tantillo DJ, Panda S. Stereodivergent Zweifel Olefination and its Mechanistic Dichotomy. Angew Chem Int Ed Engl 2023; 62:e202309136. [PMID: 37495925 DOI: 10.1002/anie.202309136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 07/28/2023]
Abstract
Stereoselective Zweifel olefination using boronate complexes carrying two different reactive π-systems was achieved to synthesize vinyl heteroarenes and conjugated 1,3-dienes in good yield and up to 100 % stereoselectivity, which remains unexplored until now. Most importantly, we report the unprecedented formation of E vs. Z-vinyl heteroarenes for different heteroarenes under identical conditions. Density functional theory (DFT) investigations unveil the mechanistic dichotomy between olefin and heteroarene activation followed by 1,2-migration, leading to E or Z-vinyl heteroarenes respectively. We also report a previously unknown reversal of stereoselectivity by using 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an electrophile. The Zweifel olefination using a boronate complex that carries two different olefins was previously unexplored due to significant challenges associated with the site-selective activation of olefins. We have solved this problem and reported the site-selective activation of olefins for the stereoselective synthesis of 1,3-dienes.
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Affiliation(s)
- Samir Manna
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Swagata Paul
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California, Davis, CA 95616, USA
| | - Debasis Aich
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Rupam Sahoo
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
| | - Dean J Tantillo
- Department of Chemistry, University of California, Davis, CA 95616, USA
| | - Santanu Panda
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal, India
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3
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Stammers E, Parsons CD, Clayden J, Lennox AJJ. Electrochemical synthesis of biaryls by reductive extrusion from N,N'-diarylureas. Nat Commun 2023; 14:4561. [PMID: 37507363 PMCID: PMC10382484 DOI: 10.1038/s41467-023-40237-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
The synthesis of biaryl compounds by the transition-metal free coupling of arenes is an important contemporary challenge, aiming to avoid the toxicity and cost profiles associated with the metal catalysts commonly used in the synthesis of these pharmaceutically relevant motifs. In this paper, we describe an electrochemical approach to the synthesis of biaryls in which aniline derivatives are coupled through the formation and reduction of a temporary urea linkage. The conformational alignment of the arenes in the N,N'-diaryl urea intermediates promotes C-C bond formation following single-electron reduction. Our optimized conditions are suitable for the synthesis of a variety of biaryls, including sterically hindered examples carrying ortho-substituents, representing complementary reactivity to most metal catalysed methods.
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Affiliation(s)
- Ellie Stammers
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Chris D Parsons
- Early Chemical Development, Pharmaceutical Sciences, R&D, AstraZeneca, Macclesfield, SK10 2NA, UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Alastair J J Lennox
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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4
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Hazra S, Mahato S, Kanti Das K, Panda S. Transition-Metal-Free Heterocyclic Carbon-Boron Bond Formation. Chemistry 2022; 28:e202200556. [PMID: 35438817 DOI: 10.1002/chem.202200556] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Indexed: 12/16/2022]
Abstract
Heteroaryl boronic acids and esters are extremely important and valuable intermediates because of their wide application in the synthesis of marketed drugs and bioactive compounds. Over the last couple of decades, the construction of highly important heteroaryl carbon-boron bonds has created huge attention. The transition-metal-free protocols are more green, less sensitive to air and moisture, and also economically advantageous over the transition-metal-based protocols. The transition-metal-free C-H borylation of heteroarenes and C-X (X=halogen) borylation of heteroaryl halides represents an excellent approach for their synthesis. Also, various cyclization and alkyne activation protocols have been recently established for their synthesis. The goal of this review article is to summarize the existing literature and the current state of the art for transition-metal-free synthesis of heteroaryl boronic acid and esters.
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Affiliation(s)
- Subrata Hazra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Somenath Mahato
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Santanu Panda
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
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5
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Mahato S, Nandy S, Das KK, Panda S. Zirconium Promoted Synthetic Transformations of Organoboron Compounds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Somenath Mahato
- IIT Kharagpur: Indian Institute of Technology Kharagpur chemistry INDIA
| | - Soumilee Nandy
- IIT Kharagpur: Indian Institute of Technology Kharagpur chemistry INDIA
| | - Kanak Kanti Das
- IIT Kharagpur: Indian Institute of Technology Kharagpur chemistry INDIA
| | - Santanu Panda
- Indian Institute of Technology Kharagpur Department of Chemistry Chemistry IIT Kharagpur, Organic chemistry building, OC-207Near Rubber technology department 721302 Kharagpur INDIA
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6
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Das KK, Mahato S, Hazra S, Panda S. Development of Methods to the Synthesis of β-Boryl Acyls, Imines and Nitriles. CHEM REC 2022; 22:e202100290. [PMID: 35088513 DOI: 10.1002/tcr.202100290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 12/30/2022]
Abstract
Organoboron compounds are highly important and versatile synthetic intermediates for the preparation of a wide range of organic molecules. Organoboron compounds have drawn significant attention among organic chemists due to their Lewis acidic property, non-toxicity, and commercial availability. Over the last several decades, there has been a substantial development of new organoboron compounds, useful in organic synthesis. Among all other organoboron compounds, β-boryl carbonyl compounds are the important ones. The β-boryl compounds have appeared as promising intermediates for various synthetic transformations. The 1,4-conjugate addition of diboron reagents to carbon-carbon double bond in the presence of different transition-metal catalysts has been extensively reported by various research groups across the globe. This mini-review outlines the numerous racemic as well as asymmetric β-borylation methods developed to date.
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Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India
| | - Somenath Mahato
- Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India
| | - Subrata Hazra
- Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India
| | - Santanu Panda
- Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, India
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7
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Kanti Das K, Kumar P, Ghorai D, Mondal B, Panda S. Organoboron Compounds Towards Asymmetric Pericyclic Reaction; Exploitation to Bioactive Molecule Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 India
| | - Parveen Kumar
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 India
| | - Debraj Ghorai
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 India
| | - Buddhadeb Mondal
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 India
| | - Santanu Panda
- Department of Chemistry Indian Institute of Technology Kharagpur 721302 India
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8
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Yoshida T, Honda Y, Morofuji T, Kano N. N-Methylphenothiazine S-Oxide Enabled Oxidative C(sp 2)-C(sp 2) Coupling of Boronic Acids with Organolithiums via Phenothiaziniums. Org Lett 2021; 23:9664-9668. [PMID: 34878797 DOI: 10.1021/acs.orglett.1c03986] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we report the development of a transition-metal-free oxidative C(sp2)-C(sp2) coupling of readily available boronic acids and organolithiums via phenothiazinium ions. Various biaryl, styrene, and diene derivatives were obtained using this reaction system. The key to this process is N-methylphenothiazine S-oxide (PTZSO), which allows efficient conversion of boronic acids to phenothiazinium ions. The mechanism of phenothiazinium formation using PTZSO was investigated using theoretical calculations and experiments, which provided insight into the unique reactivity of PTZSO.
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Affiliation(s)
- Tatsuki Yoshida
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Yuki Honda
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Tatsuya Morofuji
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Naokazu Kano
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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Alam S, Karim R, Khan A, Pal AK, Maruani A. Copper‐Catalyzed Preparation of Alkenylboronates and Arylboronates. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100817] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Safiul Alam
- Department of Chemistry Aliah University IIA/27, New Town Kolkata 700160 India
| | - Rejaul Karim
- Department of Chemistry Aliah University IIA/27, New Town Kolkata 700160 India
| | - Aminur Khan
- Department of Chemistry Aliah University IIA/27, New Town Kolkata 700160 India
| | - Amarta Kumar Pal
- Centre for Advance Studies in Chemistry North-Eastern Hill University Mawlai Campus Shillong 793022 India
| | - Antoine Maruani
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques – UMR 8601 Université de Paris UFR Biomédicale 45 rue des Saints Pères Paris 75006 France
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10
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Nandy S, Paul S, Das KK, Kumar P, Ghorai D, Panda S. Synthesis and reactivity of alkynyl boron compounds. Org Biomol Chem 2021; 19:7276-7297. [PMID: 34374405 DOI: 10.1039/d1ob00465d] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Over the last century, there have been considerable developments in organoboron chemistry due to the stability, non-toxicity, and easy commercial availability of various boronic esters. Several organoboron reagents have emerged and play an increasingly important role in everyday organic synthesis. Among them, alkynyl boron compounds have attracted significant attention due to their easy synthesis and diverse reactivity. In this review, we summarize the advancement of research on alkynyl boron compounds, highlighting their importance in the synthesis of valuable compounds.
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Affiliation(s)
- Soumilee Nandy
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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11
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Roscales S, Csáky AG. Synthesis of Ketones by C−H Functionalization of Aldehydes with Boronic Acids under Transition‐Metal‐Free Conditions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar Universidad Complutense Campus de Excelencia Internacional Moncloa Paseo de Juan XXIII, 1 28040 Madrid Spain
| | - Aurelio G. Csáky
- Instituto Pluridisciplinar Universidad Complutense Campus de Excelencia Internacional Moncloa Paseo de Juan XXIII, 1 28040 Madrid Spain
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12
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13
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Roscales S, Csáky AG. Synthesis of Ketones by C-H Functionalization of Aldehydes with Boronic Acids under Transition-Metal-Free Conditions. Angew Chem Int Ed Engl 2021; 60:8728-8732. [PMID: 33476411 DOI: 10.1002/anie.202015835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/30/2020] [Indexed: 12/11/2022]
Abstract
A method for the synthesis of ketones from aldehydes and boronic acids via a transition-metal-free C-H functionalization reaction is reported. The method employs nitrosobenzene as a reagent to drive the simultaneous activation of the boronic acid as a boronate and the activation of the C-H bond of the aldehyde as an iminium species that triggers the key C-C bond-forming step via an intramolecular migration from boron to carbon. These findings constitute a practical, scalable, and operationally straightforward method for the synthesis of ketones.
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Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, Paseo de Juan XXIII, 1, 28040, Madrid, Spain
| | - Aurelio G Csáky
- Instituto Pluridisciplinar, Universidad Complutense, Campus de Excelencia Internacional Moncloa, Paseo de Juan XXIII, 1, 28040, Madrid, Spain
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14
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Kanti Das K, Manna S, Panda S. Transition metal catalyzed asymmetric multicomponent reactions of unsaturated compounds using organoboron reagents. Chem Commun (Camb) 2021; 57:441-459. [PMID: 33350405 DOI: 10.1039/d0cc06460b] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Asymmetric multicomponent reactions allow stitching several functional groups in an enantioselective and atom economical manner. The introduction of boron-based reagents as a multicomponent coupling partner has its own merits. In addition to being non-toxic and highly stable, organoboron compounds can be easily converted to other functional groups in a stereoselective manner. In the last decade several transition metal catalyzed asymmetric multicomponent strategies have been evolved using boron based reagents. This review will discuss the merits and scope of multicomponent strategies based on their difference in the reaction mechanism and transition metals involved.
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Affiliation(s)
- Kanak Kanti Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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15
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Liu Y, Xue D, Wang C, Huang L. Room-Temperature Palladium(II)-Catalyzed Direct 2-Arylation of Indoles with Tetraarylstannanes. Synlett 2020. [DOI: 10.1055/s-0040-1707196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A palladium(II)-catalyzed direct 2-arylation of indoles by tetraarylstannanes with oxygen (balloon) as the oxidant at room temperature has been developed. Various tetraarylstannanes can be employed as aryl sources for 2-arylation of indoles in up to 89% yield, providing a practical and efficient catalytic protocol for accessing 2-arylindoles.
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Affiliation(s)
- Yuxia Liu
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University
| | - Dong Xue
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University
| | - Chao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University
| | - Linjuan Huang
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University
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Das KK, Panda S. Functionalization of Heterocycles through 1,2‐Metallate Rearrangement of Boronate Complexes. Chemistry 2020; 26:14270-14282. [DOI: 10.1002/chem.202002573] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 07/14/2020] [Indexed: 01/27/2023]
Affiliation(s)
| | - Santanu Panda
- Indian Institute of Technology Kharagpur 721302 India
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17
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Gerleve C, Studer A. Transition-Metal-Free Oxidative Cross-Coupling of Tetraarylborates to Biaryls Using Organic Oxidants. Angew Chem Int Ed Engl 2020; 59:15468-15473. [PMID: 32159264 PMCID: PMC7496537 DOI: 10.1002/anie.202002595] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Indexed: 12/11/2022]
Abstract
Readily prepared tetraarylborates undergo selective (cross)-coupling through oxidation with Bobbitt's salt to give symmetric and unsymmetric biaryls. The organic oxoammonium salt can be used either as a stoichiometric oxidant or as a catalyst in combination with in situ generated NO2 and molecular oxygen as the terminal oxidant. For selected cases, oxidative coupling is also possible with NO2 /O2 without any additional nitroxide-based cocatalyst. Transition-metal-free catalytic oxidative ligand cross-coupling of tetraarylborates is unprecedented and the introduced method provides access to various biaryl and heterobiaryl systems.
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Affiliation(s)
- Carolin Gerleve
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
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Gerleve C, Studer A. Übergangsmetallfreie oxidative Kreuzkupplung von Tetraarylboraten zu Biarylen mit organischen Oxidationsmitteln. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002595] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Carolin Gerleve
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
| | - Armido Studer
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
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