1
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Scholz AS, Massoth JG, Stoess L, Bolte M, Braun M, Lerner HW, Mewes JM, Wagner M, Froitzheim T. NBN- and BNB-Phenalenyls: the Yin and Yang of Heteroatom-doped π Systems. Chemistry 2024; 30:e202400320. [PMID: 38426580 DOI: 10.1002/chem.202400320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/02/2024]
Abstract
NBN- and BNB-doped phenalenyls are isoelectronic to phenalenyl anions and cations, respectively. They represent a pair of complementary molecules that have essentially identical structures but opposite properties as electron donors and acceptors. The NBN-phenalenyls 1-4 considered here were prepared from N,N'-dimethyl-1,8-diaminonaphthalene and readily available boron-containing building blocks (i. e., BH3⋅SMe2 (1), p-CF3-C6H4B(OH)2 (2), C6H5B(OH)2 (3), or MesBCl2/iPr2NEt (4)). Treatment of 1 with 4-Me2N-2,6-Me2-C6H2Li gave the corresponding NBN derivative 5. The BNB-phenalenyl 6 was synthesized from 1,8-naphthalenediyl-bridged diborane(6), PhNH2, and MesMgBr. A computational study reveals that the photoemission of 1, 4, and 5 originates from locally excited (LE) states at the NBN-phenalenyl fragments, while that of 2 is dominated by charge transfer (CT) from the NBN-phenalenyl to the p-CF3-C6H4 fragment. Depending on the dihedral angle θ between its Ph and NBN planes, compound 3 emits mainly from a less polar LE (θ >55°) or more polar CT state (θ <55°). In turn, the energetic preference for either state is governed by the polarity of the solvent used. An equimolar aggregate of the NBN- and BNB-phenalenyls 3 and 6 (in THF/H2O) shows a distinct red-shifted emission compared to that of the individual components, which originates from an intermolecular CT state.
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Affiliation(s)
- Alexander S Scholz
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Julian G Massoth
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Lennart Stoess
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Michael Bolte
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Markus Braun
- Institut für Physikalische und Theoretische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Jan-M Mewes
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich Wilhelms-Universität Bonn, Beringstr. 4, 53115, Bonn, Germany
| | - Matthias Wagner
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany
| | - Thomas Froitzheim
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich Wilhelms-Universität Bonn, Beringstr. 4, 53115, Bonn, Germany
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2
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Li J, Tanaka H, Imagawa T, Tsushima T, Nakamoto M, Tan J, Yoshida H. Ethynyl-B(dan) in [3+2] Cycloaddition and Larock Indole Synthesis: Synthesis of Stable Boron-Containing Heteroaromatic Compounds. Chemistry 2024; 30:e202303403. [PMID: 38109084 DOI: 10.1002/chem.202303403] [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: 10/16/2023] [Indexed: 12/19/2023]
Abstract
The cycloaddition of nitrile oxides with ethynyl-B(dan) (dan=naphthalene-1,8-diaminato) allowed the facile preparation of diverse isoxazolyl-B(dan) compounds, all of which displayed excellent protodeborylation-resistant properties. The dan-installation on the boron center proves vital to the high stability of the products as well as the perfect regioselectivity arising from hydrogen bond-directed orientation in the cycloaddition. The diminished boron-Lewis acidity of ethynyl-B(dan) also renders it amenable to azide-alkyne cycloaddition, Larock indole synthesis and related heteroannulations. The obtained boron-containing triazole, indoles, benzofuran and indenone exhibit sufficient resistance toward protodeborylation. Despite the commonly accepted transmetalation-inactive property derived from the diminished Lewis acidity, the synthesized heteroaryl-B(dan) compound was still found to be convertible to the oligoarene via sequential Suzuki-Miyaura coupling.
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Affiliation(s)
- Jialun Li
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - Hideya Tanaka
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - Taiki Imagawa
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - Takumi Tsushima
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - Masaaki Nakamoto
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
| | - Jiajing Tan
- College of Chemistry, Beijing University of Chemical Technology (BUCT), Beijing, 100029, China
| | - Hiroto Yoshida
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
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3
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Tomota K, Izumi Y, Nakanishi K, Nakamoto M, Yoshida H. Efficient one-pot synthesis of dan-substituted organo- and silyl-boron compounds. Org Biomol Chem 2023. [PMID: 37161742 DOI: 10.1039/d3ob00613a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Direct, transition metal-free B(dan)-installation into organic frameworks has been developed. Heteroaryl-H bonds were transformable into the respective heteroaryl-B(dan) bonds through deprotonation. The resulting heteroaryl-B(dan) compounds, which are otherwise difficult to access, can undergo the direct Suzuki-Miyaura coupling. The method was demonstrated to apply to a silicon nucleophile, giving Lewis acidity-diminished stable silyl-B(dan) and -B(aam) in one pot.
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Affiliation(s)
- Kazuki Tomota
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Yuki Izumi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Kazuki Nakanishi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Masaaki Nakamoto
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Hiroto Yoshida
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
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4
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Yasuda T, Yoshigoe Y, Saito S. Copper-Catalyzed Borylation of Styrenes by 1,8-Diaminonaphthalene-Protected Diboronic Acid. Org Lett 2023; 25:2093-2097. [PMID: 36947669 PMCID: PMC10071482 DOI: 10.1021/acs.orglett.3c00451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
We report a concise synthesis of 1,8-diaminonaphthalene-protected diboronic acid (B2(dan)2), which is a promising borylating agent. B2(dan)2 is a bench-stable compound, and it could be utilized for Cu-catalyzed borylation of styrene derivatives. The reaction proceeded in a highly selective manner, and the products were isolated in up to 97% yields. Mechanistic studies revealed that a borate species would be a key intermediate for the borylation reaction.
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Affiliation(s)
- Taiga Yasuda
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Yusuke Yoshigoe
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
| | - Shinichi Saito
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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5
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Zhai S, Forsyth C, Liu Z, Vidović D. Synthesis of Mono- and Acyclic Bis-aminoboranes via Controlled Hydroboration of Imines. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siyuan Zhai
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Craig Forsyth
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Zhizhou Liu
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Dragoslav Vidović
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
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Yoshida H, Izumi Y, Hiraoka Y, Nakanishi K, Nakamoto M, Hatano S, Abe M. A stable silylborane with diminished boron Lewis acidity. Dalton Trans 2022; 51:6543-6546. [PMID: 35445235 DOI: 10.1039/d2dt00962e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new dimethyl(phenyl)silylborane having a naphthalene-1,8-diaminato (dan) substituent on the boron center, PhMe2Si-B(dan), was synthesized. Owing to the diminished boron Lewis acidity, it is highly stable toward air. Synthetic application of the silylborane to catalytic silylboration and silylation of alkynes is also described.
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Affiliation(s)
- Hiroto Yoshida
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Yuki Izumi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Yuta Hiraoka
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Kazuki Nakanishi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Masaaki Nakamoto
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Sayaka Hatano
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
| | - Manabu Abe
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
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7
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Yoshida H. Main-Group Organometallics Containing Boron or Tin that Open New Frontiers in Organic Synthesis. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hiroto Yoshida
- Graduate School of Advanced Science and Engineering, Hiroshima University
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8
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Yoshida H. Borylation and Stannylation Reactions with Tuning of Lewis Acidity. CHEM REC 2021; 21:3483-3497. [PMID: 34075689 DOI: 10.1002/tcr.202100099] [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: 03/29/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 01/05/2023]
Abstract
A B(dan) moiety (dan=naphthalene-1,8-diaminato) of diminished boron-Lewis acidity has efficiently been installed into organic frameworks by three-component carboboration of alkenes under copper catalysis, where a Cu-B(dan) species, generated by chemoselective σ-bond metathesis between a copper catalyst and an unsymmetrical diboron [(pin)B-B(dan)], acts as a key intermediate. The Cu-B(dan) species has also turned out to serve as a B(dan) nucleophile to afford various dan-substituted organoboranes via borylative substitution of carbon electrophiles. Furthermore, borylation reactions with another Lewis acidity-diminished boron unit, B(aam) (aam=anthranilamidato), have become feasible by use of (pin)B-B(aam) or H-B(aam). The resulting dan/aam-substituted organoboranes have been demonstrated to undergo direct cross-coupling without prior acidic deprotection, regardless of their diminished boron-Lewis acidity. Synthesis of diverse organostannanes based upon copper-catalyzed carbostannylation and borylstannylation, in which Lewis acidity increment of a tin center facilitates the progress in some cases, have also been described.
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Affiliation(s)
- Hiroto Yoshida
- Graduate School of Advanced Science and Technology, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan
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9
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Catalyst-free and eco-friendly synthesis of masked haloarylboronic acids R (alkyl or aryl)-B(dan) on water. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132205] [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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10
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Cook XAF, de Gombert A, McKnight J, Pantaine LRE, Willis MC. The 2-Pyridyl Problem: Challenging Nucleophiles in Cross-Coupling Arylations. Angew Chem Int Ed Engl 2021; 60:11068-11091. [PMID: 32940402 PMCID: PMC8246887 DOI: 10.1002/anie.202010631] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Indexed: 12/22/2022]
Abstract
Azine-containing biaryls are ubiquitous scaffolds in many areas of chemistry, and efficient methods for their synthesis are continually desired. Pyridine rings are prominent amongst these motifs. Transition-metal-catalysed cross-coupling reactions have been widely used for their synthesis and functionalisation as they often provide a swift and tuneable route to related biaryl scaffolds. However, 2-pyridine organometallics are capricious coupling partners and 2-pyridyl boron reagents in particular are notorious for their instability and poor reactivity in Suzuki-Miyaura cross-coupling reactions. The synthesis of pyridine-containing biaryls is therefore limited, and methods for the formation of unsymmetrical 2,2'-bis-pyridines are scarce. This Review focuses on the methods developed for the challenging coupling of 2-pyridine nucleophiles with (hetero)aryl electrophiles, and ranges from traditional cross-coupling processes to alternative nucleophilic reagents and novel main group approaches.
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Affiliation(s)
- Xinlan A. F. Cook
- Chemistry Research LaboratoryOxford University12 Mansfield RoadOxfordOX1 3TAUK
| | - Antoine de Gombert
- Chemistry Research LaboratoryOxford University12 Mansfield RoadOxfordOX1 3TAUK
| | - Janette McKnight
- Chemistry Research LaboratoryOxford University12 Mansfield RoadOxfordOX1 3TAUK
| | - Loïc R. E. Pantaine
- Chemistry Research LaboratoryOxford University12 Mansfield RoadOxfordOX1 3TAUK
| | - Michael C. Willis
- Chemistry Research LaboratoryOxford University12 Mansfield RoadOxfordOX1 3TAUK
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11
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Yoshida H, Li J. Recent Advances in Synthetic Transformations with Robust Yet Reactive B(Dan) Moiety. HETEROCYCLES 2021. [DOI: 10.3987/rev-20-949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Kamio S, Yoshida H. Synthetic Chemistry with Lewis Acidity‐Diminished B(aam) and B(dan) Groups: Borylation Reactions and Direct Cross‐Couplings. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001460] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shintaro Kamio
- Graduate School of Engineering Hiroshima University Higashi Hiroshima 739-8526 Japan
| | - Hiroto Yoshida
- Graduate School of Advanced Science and Engineering Hiroshima University Higashi Hiroshima 739-8526 Japan
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13
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Tani T, Takahashi N, Sawatsugawa Y, Osano M, Tsuchimoto T. Stepwise Suzuki−Miyaura Cross‐Coupling of Triborylalkenes Derived from Alkynyl−B(dan)s: Regioselective and Flexible Synthesis of Tetrasubstituted Alkenes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001116] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tomohiro Tani
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Naomi Takahashi
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Yuuki Sawatsugawa
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Mana Osano
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
| | - Teruhisa Tsuchimoto
- Department of Applied Chemistry School of Science and Technology Meiji University, 1-1-1 Higashimita, Tama-ku Kawasaki 214-8571 Japan
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14
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Cook XAF, Gombert A, McKnight J, Pantaine LRE, Willis MC. The 2‐Pyridyl Problem: Challenging Nucleophiles in Cross‐Coupling Arylations. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010631] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xinlan A. F. Cook
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA UK
| | - Antoine Gombert
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA UK
| | - Janette McKnight
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA UK
| | - Loïc R. E. Pantaine
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA UK
| | - Michael C. Willis
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA UK
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