1
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Budiman YP, Putra MH, Ramadhan MR, Hannifah R, Luz C, Ghafara IZ, Rustaman R, Ernawati EE, Mayanti T, Groß A, Radius U, Marder TB. Pd-Catalyzed Oxidative C-H Arylation of (Poly)fluoroarenes with Aryl Pinacol Boronates and Experimental and Theoretical Studies of its Reaction Mechanism. Chem Asian J 2024; 19:e202400094. [PMID: 38412058 DOI: 10.1002/asia.202400094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
We report the synergistic combination of Pd(OAc)2 and Ag2O for the oxidative C-H arylation of (poly)fluoroarenes with aryl pinacol boronates (Ar-Bpin) in DMF as the solvent. This procedure can be conducted easily in air, and without using additional ligands, to afford the fluorinated unsymmetrical biaryl products in up to 98 % yield. Experimental studies suggest that the formation of [PdL2(C6F5)2] in DMF as coordinating solvent does not take place under the reaction conditions as it is stable to reductive elimination and thus would deactivate the catalyst. Thus, the intermediate [Pd(DMF)2(ArF)(Ar)] must be formed selectively to give desired arylation products. DFT calculations predict a low barrier (5.87 kcal/mol) for the concerted metalation deprotonation (CMD) process between C6F5H and the Pd(II) species formed after transmetalation between the Pd(II)X2 complex and aryl-Bpin which forms a Pd-Arrich species. Thus a Pd(Arrich)(Arpoor) complex is generated selectively which undergoes reductive elimination to generate the unsymmetrical biaryl product.
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Affiliation(s)
- Yudha P Budiman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | | | - Muhammad R Ramadhan
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Raiza Hannifah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Christian Luz
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ilham Z Ghafara
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Rustaman Rustaman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Engela E Ernawati
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Tri Mayanti
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, 45363, Sumedang, Indonesia
| | - Axel Groß
- Institute of Theoretical Chemistry, Ulm University, 89081, Ulm, Germany
- Helmholtz Institute Ulm (HIU), Electrochemical Energy Storage, 89069, Ulm, Germany
| | - Udo Radius
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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Asiri JA, Hasan WMI, Jedidi A, Elroby SA, Aziz SG, Osman OI. Organoboron Complexes as Thermally Activated Delayed Fluorescence (TADF) Materials for Organic Light-Emitting Diodes (OLEDs): A Computational Study. Molecules 2023; 28:6952. [PMID: 37836795 PMCID: PMC10574585 DOI: 10.3390/molecules28196952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
We report on organoboron complexes characterized by very small energy gaps (ΔEST) between their singlet and triplet states, which allow for highly efficient harvesting of triplet excitons into singlet states for working as thermally activated delayed fluorescence (TADF) devices. Energy gaps ranging between 0.01 and 0.06 eV with dihedral angles of ca. 90° were registered. The spin-orbit couplings between the lowest excited S1 and T1 states yielded reversed intersystem crossing rate constants (KRISC) of an average of 105 s-1. This setup accomplished radiative decay rates of ca. 106 s-1, indicating highly potent electroluminescent devices, and hence, being suitable for application as organic light-emitting diodes.
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Affiliation(s)
- Jamilah A. Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
- Department of Chemistry, College of Arts and Sciences, Prince Sattam bin Abdulaziz University, Wadi Ad-Dwasir 18510, Saudi Arabia
| | - Walid M. I. Hasan
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
| | - Abdesslem Jedidi
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
| | - Shaaban A. Elroby
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
- Chemistry Department, Faculty of Science, Beni-Suif University, Beni-Suif 62521, Egypt
| | - Saadullah G. Aziz
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
| | - Osman I. Osman
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.A.A.); (W.M.I.H.); (A.J.); (S.G.A.)
- Chemistry Department, Faculty of Science, University of Khartoum, Khartoum P.O. Box 321, Sudan
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Liu LC, Qian J, Duan L, Wang B, Tu FH, Li Q, Wang H. Stereoselective Synthesis of Amphoteric α-Haloalkenyl Boronates via Halogenative Semipinacol Rearrangement of B(MIDA)-Propargylic Alcohols. Chemistry 2023:e202301011. [PMID: 37129911 DOI: 10.1002/chem.202301011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/28/2023] [Accepted: 05/01/2023] [Indexed: 05/03/2023]
Abstract
The facile synthesis of stereo-defined and transformable functionality-enriched building blocks is of great importance in modern organic chemistry, which allows the rapid and divergent assembly of complex molecules. Reported herein is a halogen electrophile (N-bromosuccinimide and N-iodosuccinimide) initiated semipinacol rearrangement reaction of B(MIDA)-propargylic alcohols (MIDA = N-methyliminodiacetyl) via aryl migration towards the synthesis of amphoteric α-haloalkenyl boronates in moderate to good yields with excellent stereoselectivities. The value of the products is evidenced by their ability to undergo divergent conversions to polysubstituted alkenes through manipulation of the C-B and C-X (X = Br, I) bonds and the carbonyl group.
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Affiliation(s)
- Li-Cai Liu
- Sun Yat-Sen University, School of Pharmaceutical Sciences, CHINA
| | - Jiasheng Qian
- Sun Yat-Sen University, School of Pharmaceutical Sciences, CHINA
| | - Liyan Duan
- Sun Yat-Sen University, Shangdong Apeloa Tospo Pharmaceutical Co.,Ltd, CHINA
| | - Bin Wang
- Sun Yat-Sen University, Shangdong Apeloa Tospo Pharmaceutical Co.,Ltd, CHINA
| | - Fang-Hai Tu
- Sun Yat-Sen University, School of Pharmaceutical Sciences, CHINA
| | - Qingjiang Li
- Sun Yat-Sen University, Shangdong Apeloa Tospo Pharmaceutical Co.,Ltd, CHINA
| | - Honggen Wang
- Sun Yat-Sen University, School of Pharmaceutical Sciences, 132 East Waihuan Road, College City, 510006, Guangzhou, CHINA
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Chen XY, Gao FC, Ning PF, Wei Y, Hong K. Facile Access to Cyclopropylboronates via Stereospecific Deborylative Cyclization: A Leaving Group-Assisted Activation of Geminal Diborons. Angew Chem Int Ed Engl 2023; 62:e202302638. [PMID: 36960671 DOI: 10.1002/anie.202302638] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/25/2023]
Abstract
Herein we reported a transition metal-free deborylative cyclization strategy, based on which two routes have been developed, generating racemic and enantioenriched cyclopropylboronates, respectively. The cyclization of geminal bis(boronates) bearing a leaving group was highly diastereoselective, tolerating various functional groups and heterocycles. When optically active epoxides were used as the starting materials, enantioenriched cyclopropylboronates could be efficiently prepared with >99% stereospecificity. Mechanistic studies showed that the leaving group at the γ-position played a crucial role and significantly promoted the activation of the gem-diboron moiety.
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Affiliation(s)
- Xin-Yi Chen
- East China Normal University, School of Chemistry and Molecular Engineering, CHINA
| | - Feng-Chen Gao
- East China Normal University, School of Chemistry and Molecular Engineering, CHINA
| | - Peng-Fei Ning
- East China Normal University, School of Chemistry and Molecular Engineering, CHINA
| | - Yi Wei
- East China Normal University, School of Chemistry and Molecular Engineering, CHINA
| | - Kai Hong
- East China Normal University, Department of Chemistry, 3663 N Zhongshan Road, 200062, Shanghai, CHINA
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5
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Wang K, Xu Y, Wang J. Palladium-Catalyzed Cyclizative Borylation of Allenyl Ketones through Carbene Boryl Migratory Insertion: Access to Densely Substituted Furyl Boronates. Chemistry 2023; 29:e202203697. [PMID: 36448967 DOI: 10.1002/chem.202203697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 11/29/2022] [Accepted: 11/30/2022] [Indexed: 12/05/2022]
Abstract
Herein the palladium-catalyzed cyclizative borylation of allenyl ketones with diboron compounds is reported which involves the carbene boryl migratory insertion as the key step. This reaction features mild conditions, good functional group tolerance and broad substrate scope. Thus, it represents an efficient methodology for the assembly of diverse tri-substituted furyl boronates. In addition, a series of transformations of the resultant multi-substituted furyl boronates were conducted to provide various densely substituted furan derivatives in good yields, further illustrating the potential synthetic utility of this methodology.
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Affiliation(s)
- Kang Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, 100871, Beijing, China
| | - Yan Xu
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, 100871, Beijing, China
| | - Jianbo Wang
- Beijing National Laboratory of Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, 100871, Beijing, China.,The State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 200032, Shanghai, China
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6
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Okada N, Nakatsuka S, Kawasumi R, Gotoh H, Yasuda N, Hatakeyama T. Synthesis and Late-Stage Diversification of BN-Embedded Dibenzocorannulenes as Efficient Fluorescence Organic Light-Emitting Diode Emitters. Chemistry 2023; 29:e202202627. [PMID: 36260535 DOI: 10.1002/chem.202202627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Indexed: 11/07/2022]
Abstract
We report the synthesis and late-stage diversification of a new class of hetero-buckybowl, BN-embedded dibenzocorannulenes (B2 N2 -DBCs). The synthesis is achieved via one-shot halogenative borylation, comprising the nitrogen-directed haloboration of alkyne and an intramolecular bora-Friedel-Crafts reaction, which provides BN-embedded dibenzocorannulene possessing two bromo substituents (B2 N2 -DBC-Br). B2 N2 -DBC-Br undergoes diversification via coupling reactions to provide a variety of arylated derivatives (B2 N2 -DBC-R), exhibiting strong blue fluorescence. An organic light-emitting diode (OLED) employing one of the derivatives as an emitter exhibited a high external quantum efficiency of 6.6 % and long operational lifetime of 907 h at an initial luminance of 1000 cd m-2 , indicating the significant potential for the development of efficient and stable hetero-buckybowl-based OLED materials.
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Affiliation(s)
- Naoya Okada
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science, Kyoto University Sakyo-ku, Kyoto, 606-8502, Japan
| | - Ryosuke Kawasumi
- SK JNC Japan, Co. Ltd., 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Hajime Gotoh
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science, Kyoto University Sakyo-ku, Kyoto, 606-8502, Japan
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7
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Yang J, Ding WL, Li QS, Li ZS. Incorporation of a Boron-Nitrogen Covalent Bond Improves the Charge-Transport and Charge-Transfer Characteristics of Organoboron Small-Molecule Acceptors for Organic Solar Cells. Molecules 2023; 28. [PMID: 36677871 DOI: 10.3390/molecules28020811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/09/2023] [Accepted: 01/11/2023] [Indexed: 01/15/2023] Open
Abstract
An organoboron small-molecular acceptor (OSMA) MB←N containing a boron-nitrogen coordination bond (B←N) exhibits good light absorption in organic solar cells (OSCs). In this work, based on MB←N, OSMA MB-N, with the incorporation of a boron-nitrogen covalent bond (B-N), was designed. We have systematically investigated the charge-transport properties and interfacial charge-transfer characteristics of MB-N, along with MB←N, using the density functional theory (DFT) and the time-dependent density functional theory (TD-DFT). Theoretical calculations show that MB-N can simultaneously boost the open-circuit voltage (from 0.78 V to 0.85 V) and the short-circuit current due to its high-lying lowest unoccupied molecular orbital and the reduced energy gap. Moreover, its large dipole shortens stacking and greatly enhances electron mobility by up to 5.91 × 10-3 cm2·V-1·s-1. Notably, the excellent interfacial properties of PTB7-Th/MB-N, owing to more charge transfer states generated through the direct excitation process and the intermolecular electric field mechanism, are expected to improve OSCs performance. Together with the excellent properties of MB-N, we demonstrate a new OSMA and develop a new organoboron building block with B-N units. The computations also shed light on the structure-property relationships and provide in-depth theoretical guidance for the application of organoboron photovoltaic materials.
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8
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Jayarajan R, Kireilis T, Eriksson L, Szabó KJ. Asymmetric Organocatalytic Homologation: Access to Diverse Chiral Trifluoromethyl Organoboron Species. Chemistry 2022; 28:e202202059. [PMID: 35980871 DOI: 10.1002/chem.202202059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Indexed: 01/07/2023]
Abstract
A broad range of aliphatic, aromatic, and heterocyclic boronic acids were successfully homologated using trifluorodiazoethane in the presence of BINOL derivatives to provide the corresponding chiral trifluoromethyl containing boronic acid derivatives in high yields and excellent enantioselectivity. The in situ conversion of the chiral transient boronic acids to the corresponding alcohols or β-CF3 carboxylates are also demonstrated.
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Affiliation(s)
- Ramasamy Jayarajan
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Tautvydas Kireilis
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Lars Eriksson
- Department of Materials and Environmental Chemistry, Stockholm University, SE106 91, Stockholm, Sweden
| | - Kálmán J Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden
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Lu H, Chen K, Bobba RS, Shi J, Li M, Wang Y, Xue J, Xue P, Zheng X, Thorn KE, Wagner I, Lin CY, Song Y, Ma W, Tang Z, Meng Q, Qiao Q, Hodgkiss JM, Zhan X. Simultaneously Enhancing Exciton/Charge Transport in Organic Solar Cells by an Organoboron Additive. Adv Mater 2022; 34:e2205926. [PMID: 36027579 DOI: 10.1002/adma.202205926] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/10/2022] [Indexed: 06/15/2023]
Abstract
Efficient exciton diffusion and charge transport play a vital role in advancing the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, a facile strategy is presented to simultaneously enhance exciton/charge transport of the widely studied PM6:Y6-based OSCs by employing highly emissive trans-bis(dimesitylboron)stilbene (BBS) as a solid additive. BBS transforms the emissive sites from a more H-type aggregate into a more J-type aggregate, which benefits the resonance energy transfer for PM6 exciton diffusion and energy transfer from PM6 to Y6. Transient gated photoluminescence spectroscopy measurements indicate that addition of BBS improves the exciton diffusion coefficient of PM6 and the dissociation of PM6 excitons in the PM6:Y6:BBS film. Transient absorption spectroscopy measurements confirm faster charge generation in PM6:Y6:BBS. Moreover, BBS helps improve Y6 crystallization, and current-sensing atomic force microscopy characterization reveals an improved charge-carrier diffusion length in PM6:Y6:BBS. Owing to the enhanced exciton diffusion, exciton dissociation, charge generation, and charge transport, as well as reduced charge recombination and energy loss, a higher PCE of 17.6% with simultaneously improved open-circuit voltage, short-circuit current density, and fill factor is achieved for the PM6:Y6:BBS devices compared to the devices without BBS (16.2%).
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Affiliation(s)
- Heng Lu
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Kai Chen
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
- Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Raja Sekhar Bobba
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY, 13244, USA
| | - Jiangjian Shi
- CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Mengyang Li
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Yilin Wang
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jingwei Xue
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Peiyao Xue
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Xiaojian Zheng
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Karen E Thorn
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Isabella Wagner
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Chao-Yang Lin
- Robinson Research Institute, Faculty of Engineering, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Yin Song
- School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China
| | - Wei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Zheng Tang
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Qingbo Meng
- CAS Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Quinn Qiao
- Department of Mechanical and Aerospace Engineering, Syracuse University, Syracuse, NY, 13244, USA
| | - Justin M Hodgkiss
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6010, New Zealand
| | - Xiaowei Zhan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Key Laboratory of Eco-functional Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
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Gurubasavaraj PM, Sajjan VP, Muñoz-Flores BM, Jiménez Pérez VM, Hosmane NS. Recent Advances in BODIPY Compounds: Synthetic Methods, Optical and Nonlinear Optical Properties, and Their Medical Applications. Molecules 2022; 27:molecules27061877. [PMID: 35335243 PMCID: PMC8949266 DOI: 10.3390/molecules27061877] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 02/26/2022] [Accepted: 03/09/2022] [Indexed: 11/25/2022]
Abstract
Organoboron compounds are attracting immense research interest due to their wide range of applications. Particularly, low-coordinate organoboron complexes are receiving more attention due to their improbable optical and nonlinear optical properties, which makes them better candidates for medical applications. In this review, we summarize the various synthetic methods including multicomponent reactions, microwave-assisted and traditional pathways of organoboron complexes, and their optical and nonlinear properties. This review also includes the usage of organoboron complexes in various fields including biomedical applications.
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Affiliation(s)
- Prabhuodeyara M. Gurubasavaraj
- Department of Chemistry, Rani Channamma University, Belagavi 591156, India;
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
| | | | - Blanca M. Muñoz-Flores
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza 66451, Nuevo León, Mexico;
| | - Víctor M. Jiménez Pérez
- Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, San Nicolás de los Garza 66451, Nuevo León, Mexico;
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
| | - Narayan S. Hosmane
- Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, USA
- Correspondence: (P.M.G.); (V.M.J.P.); (N.S.H.)
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11
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Park IS, Yang M, Shibata H, Amanokura N, Yasuda T. Achieving Ultimate Narrowband and Ultrapure Blue Organic Light-Emitting Diodes Based on Polycyclo-Heteraborin Multi-Resonance Delayed-Fluorescence Emitters. Adv Mater 2022; 34:e2107951. [PMID: 34877725 DOI: 10.1002/adma.202107951] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/25/2021] [Indexed: 06/13/2023]
Abstract
To achieve an ultimate wide color gamut for ultrahigh-definition displays, there is great demand for the development of organic light-emitting diodes (OLEDs) enabling monochromatic, ultrapure blue electroluminescence (EL). Herein, high-efficiency and ultrapure blue OLEDs based on polycyclo-heteraborin multi-resonance thermally activated delayed fluorescence (MR-TADF) materials, BOBO-Z, BOBS-Z, and BSBS-Z, are reported. The key to the design of the present luminophores is the exquisite combination and interplay of multiple boron, nitrogen, oxygen, and sulfur heteroatoms embedded in a fused polycyclic π-system. Comprehensive photophysical and computational investigations of this family of MR-TADF materials reveal that the systematic implementation of chalcogen (oxygen and sulfur) atoms can finely modulate the emission color while maintaining a narrow bandwidth, as well as the spin-flipping rates between the excited singlet and triplet states. Consequently, OLEDs based on BOBO-Z, BOBS-Z, and BSBS-Z demonstrate narrowband and ultrapure blue EL emission, with peaks at 445-463 nm and full width at half maxima of 18-23 nm, leading to Commission Internationale de l'Éclairage-y coordinates in the range of 0.04-0.08. Particularly, for OLEDs incorporating sulfur-doped BOBS-Z and BSBS-Z, notably high maximum external EL quantum efficiencies of 26.9% and 26.8%, respectively, and small efficiency roll-offs are achieved concurrently.
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Affiliation(s)
- In Seob Park
- INAMORI Frontier Research Center (IFRC), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Minlang Yang
- INAMORI Frontier Research Center (IFRC), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiromoto Shibata
- Nippon Soda Co., Ltd., 2-2-1 Ohtemachi, Chiyoda-ku, Tokyo, 100-8165, Japan
| | - Natsuki Amanokura
- Nippon Soda Co., Ltd., 2-2-1 Ohtemachi, Chiyoda-ku, Tokyo, 100-8165, Japan
| | - Takuma Yasuda
- INAMORI Frontier Research Center (IFRC), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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12
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Saxon E, Peng X. Recent Advances in Hydrogen Peroxide Responsive Organoborons for Biological and Biomedical Applications. Chembiochem 2021; 23:e202100366. [PMID: 34636113 DOI: 10.1002/cbic.202100366] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/10/2021] [Indexed: 12/26/2022]
Abstract
Hydrogen peroxide is the most stable reactive oxygen species generated endogenously, participating in numerous physiological processes and abnormal pathological conditions. Mounting evidence suggests that a higher level of H2 O2 exists in various disease conditions. Thus, H2 O2 functions as an ideal target for site-specific bioimaging and therapeutic targeting. The unique reactivity of organoborons with H2 O2 provides a method for developing chemoselective molecules for biological and biomedical applications. This review highlights the design and application of boron-derived molecules for H2 O2 detection, and the utility of boron moieties toward masking reactive compounds leading to the development of metal prochelators and prodrugs for selectively delivering an active species at the target sites with elevated H2 O2 levels. Additionally, the emergence of H2 O2 -responsive theranostic agents consisting of both therapeutic and diagnostic moieties in one integrated system are discussed. The purpose of this review is to provide a better understanding of the role of boron-derived molecules toward biological and pharmacological applications.
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Affiliation(s)
- Eron Saxon
- University of Wisconsin-Milwaukee, Milwaukee, USA
| | - Xiaohua Peng
- University of Wisconsin-Milwaukee, Milwaukee, USA
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13
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Shimoyama D, Baser-Kirazli N, Lalancette RA, Jäkle F. Electrochromic Polycationic Organoboronium Macrocycles with Multiple Redox States. Angew Chem Int Ed Engl 2021; 60:17942-17946. [PMID: 34111328 DOI: 10.1002/anie.202105852] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/09/2021] [Indexed: 12/14/2022]
Abstract
Polycationic macrocycles are attractive as they display unique molecular switching capabilities arising from their redox properties. Although diverse polycationic macrocycles have been developed, those based on cationic boron systems remain very limited. We present herein the development of novel polycationic macrocycles by introducing organoboronium moieties into a conjugated organoboron macrocyclic framework. These macrocycles consist of four bipyridylboronium units that are connected by fluorene and either electron-deficient arylborane or electron-rich arylamine moieties. Electrochemical studies reveal that the macrocycles undergo reversible multi-step redox processes with transfer of up to 10 electrons. Switchable electrochromic behavior is demonstrated via spectroelectrochemical studies and the observed color changes are rationalized by correlation with computed electronic transitions using DFT methods.
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Affiliation(s)
- Daisuke Shimoyama
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Nurcan Baser-Kirazli
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Roger A Lalancette
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
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14
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Nagata M, Min H, Watanabe E, Fukumoto H, Mizuhata Y, Tokitoh N, Agou T, Yasuda T. Fused-Nonacyclic Multi-Resonance Delayed Fluorescence Emitter Based on Ladder-Thiaborin Exhibiting Narrowband Sky-Blue Emission with Accelerated Reverse Intersystem Crossing. Angew Chem Int Ed Engl 2021; 60:20280-20285. [PMID: 34268850 DOI: 10.1002/anie.202108283] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Indexed: 01/28/2023]
Abstract
Developing organic luminophores with unique capability of strong narrowband emission is both crucial and challenging for the further advancement of organic light-emitting diodes (OLEDs). Herein, a nanographitic fused-nonacyclic π-system (BSBS-N1), which was strategically embedded with multiple boron, nitrogen, and sulfur atoms, was developed as a new multi-resonance thermally activated delayed fluorescence (MR-TADF) emitter. Narrowband sky-blue emission with a peak at 478 nm, full width at half maximum of 24 nm, and photoluminescence quantum yield of 89 % was obtained with BSBS-N1. Additionally, the spin-orbit coupling was enhanced by incorporating two sulfur atoms, thereby facilitating the spin-flipping process between the excited triplet and singlet states. OLEDs based on BSBS-N1 as a sky-blue MR-TADF emitter achieved a high maximum external electroluminescence quantum efficiency of 21.0 %, with improved efficiency roll-off.
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Affiliation(s)
- Masakazu Nagata
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Naka-narusawa, Hitachi, Ibaraki, 316-8511, Japan
| | - Hyukgi Min
- INAMORI Frontier Research Center (IFRC) and Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Erika Watanabe
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Naka-narusawa, Hitachi, Ibaraki, 316-8511, Japan
| | - Hiroki Fukumoto
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Naka-narusawa, Hitachi, Ibaraki, 316-8511, Japan
| | - Yoshiyuki Mizuhata
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Tomohiro Agou
- Department of Quantum Beam Science, Graduate School of Science and Engineering, Ibaraki University, 4-12-1 Naka-narusawa, Hitachi, Ibaraki, 316-8511, Japan
| | - Takuma Yasuda
- INAMORI Frontier Research Center (IFRC) and Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
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15
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Frydrych M, Pakuła D, Sztorch B, Brząkalski D, Przekop RE, Marciniec B. Novel Silsesquioxane-Derived Boronate Esters-Synthesis and Thermal Properties. Molecules 2021; 26:4107. [PMID: 34299387 DOI: 10.3390/molecules26144107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 06/28/2021] [Accepted: 06/29/2021] [Indexed: 11/20/2022] Open
Abstract
The functionalization of mono- and octahydrospherosilicate with vinylboranes and allylboranes via hydrosilylation reaction in the presence of a Karstedt’s platinum (0) catalyst is presented. This is the catalytic route to obtain a new class of silsesquioxanes containing boron atoms in their structure in high yields (>90%) and with satisfactory selectivity. The obtained compounds were fully characterized by spectroscopic (1H, 13C, 29Si NMR) and spectrometric methods (MALDI-TOF-MS), as well as thermal analysis (TGA). The obtained compounds were subjected to thermal tests, characterizing the processes of melting, thermal evaporation, sublimation and thermal decomposition.
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16
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Yang T, Tang N, Wan Q, Yin SF, Qiu R. Recent Progress on Synthesis of N, N'-Chelate Organoboron Derivatives. Molecules 2021; 26:1401. [PMID: 33807680 DOI: 10.3390/molecules26051401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 02/26/2021] [Accepted: 03/01/2021] [Indexed: 02/07/2023] Open
Abstract
N,N′-chelate organoboron compounds have been successfully applied in bioimaging, organic light-emitting diodes (OLEDs), functional polymer, photocatalyst, electroluminescent (EL) devices, and other science and technology areas. However, the concise and efficient synthetic methods become more and more significant for material science, biomedical research, or other practical science. Here, we summarized the organoboron-N,N′-chelate derivatives and showed the different routes of their syntheses. Traditional methods to synthesize N,N′-chelate organoboron compounds were mainly using bidentate ligand containing nitrogen reacting with trivalent boron reagents. In this review, we described a series of bidentate ligands, such as bipyridine, 2-(pyridin-2-yl)-1H-indole, 2-(5-methyl-1H-pyrrol-2-yl)quinoline, N-(quinolin-8-yl)acetamide, 1,10-phenanthroline, and diketopyrrolopyrrole (DPP).
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17
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Full J, Panchal SP, Götz J, Krause A, Nowak‐Król A. Modular Synthesis of Organoboron Helically Chiral Compounds: Cutouts from Extended Helices. Angew Chem Int Ed Engl 2021; 60:4350-4357. [PMID: 33244880 PMCID: PMC7898935 DOI: 10.1002/anie.202014138] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/25/2020] [Indexed: 11/12/2022]
Abstract
Two types of helically chiral compounds bearing one and two boron atoms were synthesized by a modular approach. Formation of the helical scaffolds was executed by the introduction of boron to flexible biaryl and triaryl derived from small achiral building blocks. All-ortho-fused azabora[7]helicenes feature exceptional configurational stability, blue or green fluorescence with quantum yields (Φfl ) of 18-24 % in solution, green or yellow solid-state emission (Φfl up to 23 %), and strong chiroptical response with large dissymmetry factors of up to 1.12×10-2 . Azabora[9]helicenes consisting of angularly and linearly fused rings are blue emitters exhibiting Φfl of up to 47 % in CH2 Cl2 and 25 % in the solid state. As revealed by the DFT calculations, their P-M interconversion pathway is more complex than that of H1. Single-crystal X-ray analysis shows clear differences in the packing arrangement of methyl and phenyl derivatives. These molecules are proposed as primary structures of extended helices.
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Affiliation(s)
- Julian Full
- Institut für Anorganische ChemieUniversität WürzburgAm Hubland97074WürzburgGermany
- Institut für Organische Chemie and Center for Nanosystems ChemistryUniversität WürzburgAm Hubland97074WürzburgGermany
| | - Santosh P. Panchal
- Institut für Anorganische ChemieUniversität WürzburgAm Hubland97074WürzburgGermany
- Institut für Organische Chemie and Center for Nanosystems ChemistryUniversität WürzburgAm Hubland97074WürzburgGermany
| | - Julian Götz
- Institut für Organische Chemie and Center for Nanosystems ChemistryUniversität WürzburgAm Hubland97074WürzburgGermany
| | - Ana‐Maria Krause
- Institut für Organische Chemie and Center for Nanosystems ChemistryUniversität WürzburgAm Hubland97074WürzburgGermany
| | - Agnieszka Nowak‐Król
- Institut für Anorganische ChemieUniversität WürzburgAm Hubland97074WürzburgGermany
- Institut für Organische Chemie and Center for Nanosystems ChemistryUniversität WürzburgAm Hubland97074WürzburgGermany
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18
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Carter DS, Jacobs RT, Freund YR, Berry PW, Akama T, Easom EE, Lunde CS, Rock F, Stefanakis R, McKerrow J, Fischer C, Bulman CA, Lim KC, Suzuki BM, Tricoche N, Sakanari JA, Lustigman S, Plattner JJ. Macrofilaricidal Benzimidazole-Benzoxaborole Hybrids as an Approach to the Treatment of River Blindness: Part 2. Ketone Linked Analogs. ACS Infect Dis 2020; 6:180-185. [PMID: 31876143 PMCID: PMC7026882 DOI: 10.1021/acsinfecdis.9b00397] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The optimization
of a series of benzimidazole–benzoxaborole hybrid molecules
linked via a ketone that exhibit good activity against Onchocerca
volvulus, a filarial nematode responsible for the disease
onchocerciasis, also known as river blindness, is described. The lead
identified in this series, 21 (AN15470), was found to
have acceptable pharmacokinetic properties to enable an evaluation
following oral dosing in an animal model of onchocerciasis. Compound 21was effective in killing worms implanted in Mongolian gerbils
when dosed orally as a suspension at 100 mg/kg/day for 14 days but
not when dosed orally at 100 mg/kg/day for 7 days.
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Affiliation(s)
- David S. Carter
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Robert T. Jacobs
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Yvonne R. Freund
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Pamela W. Berry
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Tsutomu Akama
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Eric E. Easom
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Christopher S. Lunde
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Fernando Rock
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Rianna Stefanakis
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - James McKerrow
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0657, United States
| | - Chelsea Fischer
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Christina A. Bulman
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Kee Chong Lim
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Brian M. Suzuki
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0657, United States
| | - Nancy Tricoche
- Lindsley F. Kimball Research Institute, New York Blood Center, 310 E. 67th Street, New York, New York 10065, United States
| | - Judy A. Sakanari
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Sara Lustigman
- Lindsley F. Kimball Research Institute, New York Blood Center, 310 E. 67th Street, New York, New York 10065, United States
| | - Jacob J. Plattner
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
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19
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Akama T, Freund YR, Berry PW, Carter DS, Easom EE, Jarnagin K, Lunde CS, Plattner JJ, Rock F, Stefanakis R, Fischer C, Bulman CA, Lim KC, Suzuki BM, Tricoche N, Mansour A, DiCosty U, McCall S, Carson B, McCall JW, McKerrow J, Hübner MP, Specht S, Hoerauf A, Lustigman S, Sakanari JA, Jacobs RT. Macrofilaricidal Benzimidazole-Benzoxaborole Hybrids as an Approach to the Treatment of River Blindness: Part 1. Amide Linked Analogs. ACS Infect Dis 2020; 6:173-179. [PMID: 31876154 PMCID: PMC7026885 DOI: 10.1021/acsinfecdis.9b00396] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A series of benzimidazole–benzoxaborole
hybrid molecules
linked via an amide linker are described that exhibit good in vitro activity against Onchocerca volvulus, a filarial nematode responsible for the disease onchocerciasis,
also known as river blindness. The lead identified in this series, 8a (AN8799), was found to have acceptable pharmacokinetic
properties to enable evaluation in animal models of human filariasis.
Compound 8a was effective in killing Brugia malayi, B. pahangi, and Litomosoides sigmodontis worms present in Mongolian gerbils when dosed subcutaneously as
a suspension at 100 mg/kg/day for 14 days but not when dosed orally
at 100 mg/kg/day for 28 days. The measurement of plasma levels of 8a at the end of the dosing period and at the time of sacrifice
revealed an interesting dependence of activity on the extended exposure
for both 8a and the positive control, flubendazole.
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Affiliation(s)
- Tsutomu Akama
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Yvonne R. Freund
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Pamela W. Berry
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - David S. Carter
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Eric E. Easom
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Kurt Jarnagin
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Christopher S. Lunde
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Jacob J. Plattner
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Fernando Rock
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Rianna Stefanakis
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
| | - Chelsea Fischer
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Christina A. Bulman
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Kee Chong Lim
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Brian M. Suzuki
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0657, United States
| | - Nancy Tricoche
- Lindsley F. Kimball Research Institute, New York Blood Center, 310 E. 67th Street, New York, New York 10065, United States
| | - Abdelmoneim Mansour
- TRS Laboratories, Inc., 295 Research Drive, Athens, Georgia 30605, United States
| | - Utami DiCosty
- TRS Laboratories, Inc., 295 Research Drive, Athens, Georgia 30605, United States
| | - Scott McCall
- TRS Laboratories, Inc., 295 Research Drive, Athens, Georgia 30605, United States
| | - Ben Carson
- TRS Laboratories, Inc., 295 Research Drive, Athens, Georgia 30605, United States
| | - John W. McCall
- TRS Laboratories, Inc., 295 Research Drive, Athens, Georgia 30605, United States
| | - James McKerrow
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093-0657, United States
| | - Marc P. Hübner
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Sigmund Freud Strasse 25, 53127 Bonn, Germany
| | - Sabine Specht
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Sigmund Freud Strasse 25, 53127 Bonn, Germany
- Drugs for Neglected Diseases Initiative, 15 Chemin Louis-Dunant, 1202 Geneva, Switzerland
| | - Achim Hoerauf
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Sigmund Freud Strasse 25, 53127 Bonn, Germany
| | - Sara Lustigman
- Lindsley F. Kimball Research Institute, New York Blood Center, 310 E. 67th Street, New York, New York 10065, United States
| | - Judy A. Sakanari
- Department of Pharmaceutical Chemistry, University of California San Francisco, 1700 4th Street, San Francisco, California 94158, United States
| | - Robert T. Jacobs
- Anacor Pharmaceuticals, Inc., 1020 E. Meadow Circle, Palo Alto, California 94303, United States
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20
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Pais VF, Neumann T, Vayá I, Jiménez MC, Ros A, Pischel U. Arylisoquinoline-derived organoboron dyes with a triaryl skeleton show dual fluorescence. Beilstein J Org Chem 2019; 15:2612-2622. [PMID: 31807196 PMCID: PMC6880824 DOI: 10.3762/bjoc.15.254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 10/14/2019] [Indexed: 12/31/2022] Open
Abstract
Four new dyes that derive from borylated arylisoquinolines were prepared, containing a third aryl residue (naphthyl, 4-methoxynaphthyl, pyrenyl or anthryl) that is linked via an additional stereogenic axis. The triaryl cores were synthesized by Suzuki couplings and then transformed into boronic acid esters by employing an Ir(I)-catalyzed reaction. The chromophores show dual emission behavior, where the long-wavelength emission band can reach maxima close to 600 nm in polar solvents. The fluorescence quantum yields of the dyes are generally in the range of 0.2-0.4, reaching in some cases values as high as 0.5-0.6. Laser-flash photolysis provided evidence for the existence of excited triplet states. The dyes form fluoroboronate complexes with fluoride anions, leading to the observation of the quenching of the long-wavelength emission band and ratiometric response by the build-up of a hypsochromically shifted emission signal.
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Affiliation(s)
- Vânia F Pais
- CIQSO – Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain
| | - Tristan Neumann
- CIQSO – Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain
| | - Ignacio Vayá
- Department of Chemistry/Institute of Chemical Technology UPV-CSIC, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - M Consuelo Jiménez
- Department of Chemistry/Institute of Chemical Technology UPV-CSIC, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Abel Ros
- Institute for Chemical Research (CSIC-US) and Innovation Center in Advanced Chemistry (ORFEO−CINQA), C/ Américo Vespucio 49, 41092 Seville, Spain
- Department of Organic Chemistry, University of Seville, C/ Prof. García González 1, 41012 Seville, Spain
| | - Uwe Pischel
- CIQSO – Centre for Research in Sustainable Chemistry and Department of Chemistry, University of Huelva, Campus de El Carmen s/n, 21071 Huelva, Spain
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21
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Fordham JM, Grayson MN, Aggarwal VK. Vinylidene Homologation of Boronic Esters and its Application to the Synthesis of the Proposed Structure of Machillene. Angew Chem Int Ed Engl 2019; 58:15268-15272. [PMID: 31365776 DOI: 10.1002/anie.201907617] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/30/2019] [Indexed: 01/20/2023]
Abstract
Alkenyl boronic esters are important reagents in organic synthesis. Herein, we report that these valuable products can be accessed by the homologation of boronic esters with lithiated epoxysilanes. Aliphatic and electron-rich aromatic boronic esters provided vinylidene boronic esters in moderate to high yields, while electron-deficient aromatic and vinyl boronic esters were found to give the corresponding vinyl silane products. Through DFT calculations, this divergence in mechanistic pathway has been rationalized by considering the stabilization of negative charge in the C-Si and C-B bond breaking transition states. This vinylidene homologation was used in a short six-step stereoselective synthesis of the proposed structure of machillene, however, synthetic and reported data were found to be inconsistent.
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Affiliation(s)
- James M Fordham
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Matthew N Grayson
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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22
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Abstract
Previous work has demonstrated that variants of a heme protein, Rhodothermus marinus cytochrome c (Rma cyt c), catalyze abiological carbene boron-hydrogen (B-H) bond insertion with high efficiency and selectivity. Here we investigated this carbon-boron bondforming chemistry with cyclic, lactone-based carbenes. Using directed evolution, we obtained a Rma cyt c variant BOR LAC that shows high selectivity and efficiency for B-H insertion of 5- and 6-membered lactone carbenes (up to 24,500 total turnovers and 97.1:2.9 enantiomeric ratio). The enzyme shows low activity with a 7-membered lactone carbene. Computational studies revealed a highly twisted geometry of the 7membered lactone carbene intermediate relative to 5- and 6-membered ones. Directed evolution of cytochrome c together with computational characterization of key iron-carbene intermediates has allowed us to expand the scope of enzymatic carbene B-H insertion to produce new lactone-based organoborons.
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Affiliation(s)
- Kai Chen
- Division of Chemistry and Chemical Engineering 210-41, California Institute of Technology, Pasadena, CA 91125, USA
| | - Xiongyi Huang
- Division of Chemistry and Chemical Engineering 210-41, California Institute of Technology, Pasadena, CA 91125, USA
| | - Shuo-Qing Zhang
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 31007, P. R. of China
| | - Andrew Z Zhou
- Division of Chemistry and Chemical Engineering 210-41, California Institute of Technology, Pasadena, CA 91125, USA
| | - S B Jennifer Kan
- Division of Chemistry and Chemical Engineering 210-41, California Institute of Technology, Pasadena, CA 91125, USA
| | - Xin Hong
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 31007, P. R. of China
| | - Frances H Arnold
- Division of Chemistry and Chemical Engineering 210-41, California Institute of Technology, Pasadena, CA 91125, USA
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Katsamakas S, Papadopoulos AG, Hadjipavlou-Litina D. Boronic Acid Group: A Cumbersome False Negative Case in the Process of Drug Design. Molecules 2016; 21:molecules21091185. [PMID: 27617984 PMCID: PMC6273881 DOI: 10.3390/molecules21091185] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 08/23/2016] [Accepted: 09/02/2016] [Indexed: 11/26/2022] Open
Abstract
Herein we present, an exhaustive docking analysis considering the case of autotaxin (ATX). HA155, a small molecule inhibitor of ATX, is co-crystallized. In order to further extract conclusions on the nature of the bond formed between the ligands and the amino acid residues of the active site, density functional theory (DFT) calculations were undertaken. However, docking does not provide reproducible results when screening boronic acid derivatives and their binding orientations to protein drug targets. Based on natural bond orbital (NBO) calculations, the formed bond between Ser/Thr residues is characterized more accurately as a polar covalent bond instead of a simple nonpolar covalent one. The presented results are acceptable and could be used in screening as an active negative filter for boron compounds. The hydroxyl groups of amino acids are bonded with the inhibitor’s boron atom, converting its hybridization to sp3.
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Affiliation(s)
- Sotirios Katsamakas
- Department of Pharmaceutical Chemistry, School of Pharmacy, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
| | - Anastasios G Papadopoulos
- Laboratory of Applied Quantum Chemistry, School of Chemistry, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
| | - Dimitra Hadjipavlou-Litina
- Department of Pharmaceutical Chemistry, School of Pharmacy, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
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Hatakeyama T, Shiren K, Nakajima K, Nomura S, Nakatsuka S, Kinoshita K, Ni J, Ono Y, Ikuta T. Ultrapure Blue Thermally Activated Delayed Fluorescence Molecules: Efficient HOMO-LUMO Separation by the Multiple Resonance Effect. Adv Mater 2016; 28:2777-81. [PMID: 26865384 DOI: 10.1002/adma.201505491] [Citation(s) in RCA: 608] [Impact Index Per Article: 76.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 12/24/2015] [Indexed: 05/24/2023]
Abstract
Ultrapure blue-fluorescent molecules based on thermally activated delayed fluorescence are developed. Organic light-emitting diode (OLED) devices employing the new emitters exhibit a deep blue emission at 467 nm with a full-width at half-maximum of 28 nm, CIE coordinates of (0.12, 0.13), and an internal quantum efficiency of ≈100%, which represent record-setting performance for blue OLED devices.
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Affiliation(s)
- Takuji Hatakeyama
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
- PRESTO, Japan Science and Technology Agency, 5, Sanbancho, Chiyoda, Tokyo, 102-0075, Japan
| | - Kazushi Shiren
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Kiichi Nakajima
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Shintaro Nomura
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Soichiro Nakatsuka
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Keisuke Kinoshita
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | - Jingping Ni
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Yohei Ono
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
| | - Toshiaki Ikuta
- JNC Petrochemical Corporation, 5-1 Goi Kaigan, Ichihara, Chiba, 290-8551, Japan
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26
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Wang L, Day CS, Wright MW, Welker ME. Preparation and Diels-Alder/cross coupling reactions of a 2-diethanolaminoboron-substituted 1,3-diene. Beilstein J Org Chem 2009; 5:45. [PMID: 19936271 PMCID: PMC2779738 DOI: 10.3762/bjoc.5.45] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Accepted: 09/08/2009] [Indexed: 11/23/2022] Open
Abstract
A 2-diethanolamine boronyl substituted 1,3-diene has been synthesized in high yield and characterized spectroscopically as well as by X-ray crystallography. This diene has then subsequently been used in a number of fast, high yielding Diels–Alder/cross coupling reactions.
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Affiliation(s)
- Liqiong Wang
- Department of Chemistry, Wake Forest University, P.O. Box 7486, Winston-Salem, NC 27109, USA
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