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Zhu YX, Yuan RZ, Zhang HN, Jin GX. Selective B(3)-H Activation Affording Multinuclear Ir(III) Complexes with (o-Carboranyl)dithioester Ligands. Chemistry 2024; 30:e202401154. [PMID: 38627216 DOI: 10.1002/chem.202401154] [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: 03/22/2024] [Indexed: 06/19/2024]
Abstract
A method was developed to link two or three o-carborane moieties to form a series of carboranyl dithioester bridging ligands via in situ substitution of haloalkanes by tetraphenylphosphonium carboranyldithiocarboxylates. Based on these ligands, direct B-H activation without the assistance of Ag(I) and alkali was successfully achieved with half-sandwich Ir(III) substrate [Cp*IrCl2]2 to yield corresponding bimetallic or trimetallic complexes. Single crystal structure analyses of the B-H activated complexes and corresponding SnCl2-inserted derivatives confirm the selective B(3)-H activation in these complexes.
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Affiliation(s)
- Yong-Xiao Zhu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Run-Ze Yuan
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Hai-Ning Zhang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Guo-Xin Jin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
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2
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Tanaka K. Solid-state excimer emission of o-carborane derivatives and applications for stimuli-responsive luminescent materials. Dalton Trans 2024; 53:9240-9247. [PMID: 38747024 DOI: 10.1039/d4dt01072h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
o-Carborane is an icosahedral cluster containing boron and has been paid attention as a versatile platform for constructing stimuli-responsive materials with solid-state luminescence properties by suppressing aggregation-caused quenching (ACQ), which is the emission annihilation process observed in condensed states, such as concentrated solutions, solids and films. Non-specific intermolecular interactions in the condensed states resulting in ACQ are disturbed by the spherical boron cluster. More recently, it has been demonstrated from several reports that o-carborane is capable of assisting solid-state excimer emission in aryl-modified o-carboranes. Moreover, some of these materials provide unique stimuli-responsiveness. In the commodity design for solid-state luminescent materials, o-carboranes are responsible for disturbing intermolecular interactions and subsequently presenting solid-state luminescence. On the other hand, excimer emission, which is inducible from the intermolecular photophysical process, has been discovered in the solid state based on o-carborane materials. In this manuscript, recent progress in stimuli-responsive luminescent materials via excimer formation will be described. Moreover, as the further potential of o-carborane materials, recent findings on the photo-salient effect which can be induced through excimer formation followed by photoreaction will also be explained.
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Affiliation(s)
- Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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3
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Lee T, Jang J, Nguyen NNT, Jung J, Lee J, Lee MH. Ortho-Carborane Decorated Multi-Resonance TADF Emitters: Preserving Local Excited State and High Efficiency in OLEDs. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309016. [PMID: 38233207 PMCID: PMC10953543 DOI: 10.1002/advs.202309016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/31/2023] [Indexed: 01/19/2024]
Abstract
A novel class of o-carboranyl luminophores, 2CB-BuDABNA (1) and 3CB-BuDABNA (2) is reported, in which o-carborane moieties are incorporated at the periphery of the B,N-doped multi-resonance thermally activated delayed fluorescence (MR-TADF) core. Both compounds maintain the inherent local emission characteristics of their MR-emitting core, exhibiting intense MR-TADF with high photoluminescence quantum yields in toluene and rigid states. In contrast, the presence of the dark lowest-energy charge transfer state, induced by cage rotation in THF, is suggested to be responsible for emission quenching in a polar solvent. Despite the different arrangement of the cage on the DABNA core, both 1 and 2 show red-shifted emissions compared to the parent compound BuDABNA (3). By utilizing 1 as the emitter, high-efficiency blue organic light-emitting diodes (OLEDs) are achieved with a remarkable maximum external quantum efficiency of 25%, representing the highest reported efficiency for OLEDs employing an o-carboranyl luminophore as the emitter.
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Affiliation(s)
- Taehwan Lee
- Department of ChemistryUniversity of UlsanUlsan44610Republic of Korea
| | - Jee‐Hun Jang
- Department of Materials Science and Engineering and 3D Convergence CenterInha UniversityIncheon22212Republic of Korea
| | | | - Jaehoon Jung
- Department of ChemistryUniversity of UlsanUlsan44610Republic of Korea
| | - Jeong‐Hwan Lee
- Department of Materials Science and Engineering and 3D Convergence CenterInha UniversityIncheon22212Republic of Korea
| | - Min Hyung Lee
- Department of ChemistryUniversity of UlsanUlsan44610Republic of Korea
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4
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Sun ZZ, Gao P, Yang Y, Wang T, Wu XJ, Wang YQ. Synthesis of Carboranylated Dihydropyrrolo[1,2- a]quinoxalines and Dihydroindolo[1,2- a]quinoxalines by BF 3·OEt 2-Catalyzed Heterocyclization of C-Formyl- o-carboranes and Investigation of Their Oxidation Stability. J Org Chem 2024; 89:3573-3579. [PMID: 38377489 DOI: 10.1021/acs.joc.3c02443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
A BF3·OEt2-catalyzed synthesis of carboranylated dihydropyrrolo[1,2-a]quinoxalines and dihydroindolo[1,2-a]quinoxalines in 30-99% yields is presented through the heterocyclization of various C-modified C-formyl-o-carboranes with 1-(2-aminophenyl)-pyrroles/indoles. A systematic comparative investigation of their oxidation stability in air confirmed that 4-carboranyl-4,5-dihydropyrrolo[1,2-a]quinoxaline had better stability than the 4-phenyl analogue. A cage-deboronation reaction for N-acetyl-substituted carboranylated dihydropyrrolo[1,2-a]quinoxaline produced the corresponding 7,8-nido-carborane cesium salt. A kinetic resolution was also realized to obtain an optically pure carboranylated N-heterocycle scaffold bearing a carborane cage carbon-bonded chiral stereocenter.
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Affiliation(s)
- Zhen-Zhen Sun
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Pan Gao
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Yong Yang
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan 450000, P. R. China
| | - Tao Wang
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Xiao-Jun Wu
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan 450000, P. R. China
| | - You-Qing Wang
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan 450000, P. R. China
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5
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Yang HB, Guo Y, Cao K, Jiang QJ, Teng CC, Zhu DY, Wang SH. Iridium-catalyzed selective arylation of B(6)-H of 3-aryl- o-carboranes with arylboronic acid via direct B-H activation. Chem Commun (Camb) 2024; 60:1124-1127. [PMID: 38193475 DOI: 10.1039/d3cc05630a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
This work discloses an iridium-catalyzed selective arylation of B(6)-H of 3-Ar-o-carboranes with arylboronic acid via direct B-H activation for the first time. A series of unsymmetric and symmetric 3,6-diaryl-o-carboranes decorated with diverse active groups have been synthesized with moderate to excellent yields under mild conditions. This work offers an efficient approach for selective arylation of B(6)-H with arylboronic acid and has important value for selective functionalization of o-carboranes.
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Affiliation(s)
- Han-Bo Yang
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan, P. R. China.
| | - Yan Guo
- Department of Oncology, Sichuan Science City Hospital, Mianyang, Sichuan, 621000, P. R. China
| | - Ke Cao
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan, P. R. China.
| | - Qi-Jia Jiang
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan, P. R. China.
| | - Chao-Chao Teng
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan, P. R. China.
| | - Dao-Yong Zhu
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Shao-Hua Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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6
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Nie Z, Cheng R, Qiu Z, Xie Z. Reaction of 4-Bpin-o-Carborane with Ketones: Sequential Carbon Vertex Alkylation and B-B Bond Activation. Chem Asian J 2023; 18:e202300598. [PMID: 37547963 DOI: 10.1002/asia.202300598] [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: 07/11/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Diboron compounds are important reagents in a series of transition metal catalyzed or metal-free borylation reactions. We describe herein a unique reactivity of 4-Bpin-o-carborane with ketones under basic conditions, leading to sequential cage carbon alkylation, B-B bond activation and unexpected O-migration. The reaction was compatible with a good substrate scope including dialkyl or alkyl aryl ketones. The reaction mechanism is also proposed, involving cage CH deprotonation, nucleophilic attack of ketone, and O-migration along with B-B bond cleavage.
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Affiliation(s)
- Zhen Nie
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai, 200032, China
| | - Ruofei Cheng
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai, 200032, China
| | - Zaozao Qiu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai, 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou, 310024, China
| | - Zuowei Xie
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai, 200032, China
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China
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7
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Duan HX, Li HN, Yang Y, Wu XJ, Wang YQ. Catalytic asymmetric synthesis of carboranylated diols bearing two adjacent stereocenters located at the α,β-position of o-carborane cage carbon. Dalton Trans 2023; 52:4077-4085. [PMID: 36880957 DOI: 10.1039/d3dt00129f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Despite the great interest in carborane-containing molecules, there is a lack of literature on the generation of central chiralities, via catalytic asymmetric transformations using prochiral carboranyl substrates. Herein, we have synthesized novel optically active icosahedral carborane-containing diols via Sharpless catalytic asymmetric dihydroxylation of carborane-derived alkenes, under mild conditions. The reaction showed a good substrate scope with 74-94% yields and 92->99% ee. This synthetic approach facilitated the creation of two adjacent stereocenters respectively located at the α,β-position of o-carborane cage carbon, with a single syn-diastereoisomer. In addition, the obtained chiral carborane-containing diol product can be transformed to cyclic sulfate and can subsequently undergo a nucleophilic substitution and reduction to obtain the unexpected nido-carboranyl derivatives of chiral amino alcohols in the form of zwitterions.
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Affiliation(s)
- Hui-Xin Duan
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China.
| | - Hao-Nan Li
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China.
| | - Yong Yang
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
| | - Xiao-Jun Wu
- Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
| | - You-Qing Wang
- Provincial Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng, Henan, 475004, People's Republic of China. .,Zhengzhou Yuanli Biological Technology Co., Ltd., Zhengzhou, Henan, 450001, People's Republic of China
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8
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Sun F, Tan S, Cao HJ, Lu CS, Tu D, Poater J, Solà M, Yan H. Facile Construction of New Hybrid Conjugation via Boron Cage Extension. J Am Chem Soc 2023; 145:3577-3587. [PMID: 36744315 DOI: 10.1021/jacs.2c12526] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Aromatic polycyclic systems have been extensively utilized as structural subunits for the preparation of various functional molecules. Currently, aromatics-based polycyclic systems are predominantly generated from the extension of two-dimensional (2D) aromatic rings. In contrast, polycyclic compounds based on the extension of three-dimensional (3D) aromatics such as boron clusters are less studied. Here, we report three types of boron cluster-cored tricyclic molecular systems, which are constructed from a 2D aromatic ring, a 3D aromatic nido-carborane, and an alkyne. These new tricyclic compounds can be facilely accessed by Pd-catalyzed B-H activation and the subsequent cascade heteroannulation of carborane and pyridine with an alkyne in an isolated yield of up to 85% under mild conditions without any additives. Computational results indicate that the newly generated ring from the fusion of the 3D carborane, the 2D pyridyl ring, and an alkyne is non-aromatic. However, such fusion not only leads to a 1H chemical shift considerably downfield shifted owing to the strong diatropic ring current of the embedded carborane but also devotes to new/improved physicochemical properties including increased thermal stability, the emergence of a new absorption band, and a largely red-shifted emission band and enhanced emission efficiency. Besides, a number of bright, color-tunable solid emitters spanning over all visible light are obtained with absolute luminescence efficiency of up to 61%, in contrast to aggregation-caused emission quenching of, e.g., Rhodamine B containing a 2D-aromatics-fused structure. This work demonstrates that the new hybrid conjugated tricyclic systems might be promising structural scaffolds for the construction of functional molecules.
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Affiliation(s)
- Fangxiang Sun
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shuaimin Tan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Hou-Ji Cao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Chang-Sheng Lu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Deshuang Tu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Jordi Poater
- Departament de Química Inorgànica i Orgànica & IQTCUB, Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain.,ICREA, Pg. Lluís Companys 23, Barcelona 08010, Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/ Maria Aurèlia Capmany, 69, Girona 17003, Catalonia, Spain
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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9
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Zhang H, Cheng R, Qiu Z, Xie Z. Iridium-catalyzed regioselective B(3,6)-dialkenylation or B(4)-alkenylation of o-carboranes via B-H activation and 1,2-carbon migration of alkynes. Chem Commun (Camb) 2023; 59:740-743. [PMID: 36541286 DOI: 10.1039/d2cc05890a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An efficient Ir-catalyzed cage boron alkenylation of 1-(2'-picolyl)-o-carboranes with diarylacetylenes has been developed, leading to a wide variety of B-H geminal addition products via 1,2-carbon migration of alkynes. The steric effect of cage carbon substituents has a great impact on the regioselectivity of such alkenylation reactions.
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Affiliation(s)
- Huifang Zhang
- NMPA Key Laboratory for Research and Evaluation of Innovative Drug, Henan Key Laboratory of Organic Functional Molecules and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.,Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai 200032, China.
| | - Ruofei Cheng
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai 200032, China.
| | - Zaozao Qiu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai 200032, China. .,School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
| | - Zuowei Xie
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Rd, Shanghai 200032, China. .,Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T, Hong Kong, China.
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10
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Zhu M, Zhou Q, Cheng H, Sha Y, Bregadze VI, Yan H, Sun Z, Li X. Boron-Cluster Embedded Necklace-Shaped Nanohoops. Angew Chem Int Ed Engl 2023; 62:e202213470. [PMID: 36203221 DOI: 10.1002/anie.202213470] [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: 09/13/2022] [Indexed: 12/30/2022]
Abstract
The combination of carbon-based nanohoops with other functional organic molecular structures should lead to the design of new molecular configurations with interesting properties. Here, necklace-like nanohoops embedded with carborane were synthesized for the first time. The unique deboronization of o-carborane has led to the facile preparation of ionic nanohoop compounds. Nanohoops functionalized by nido-o-carborane show excellent fluorescence emission, with a solution quantum yield of up to 90.0 % in THF and a solid-state quantum efficiency of 87.3 %, which opens an avenue for the applications of the nanohoops in OLEDs and bioimaging.
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Affiliation(s)
- Miao Zhu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qin Zhou
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - He Cheng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ye Sha
- Department of Chemistry and Materials Science, College of Science, Nanjing Forestry University, Nanjing, 210037, China
| | - Vladimir I Bregadze
- A. N. Nesmeyanov Institute of Organoelement Compounds (INEOS) Russian Academy of Sciences, Moscow, 119991, Russia
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, 210023, China
| | - Zhe Sun
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, 92 Weijin Road, Tianjin, 300072, China
| | - Xiang Li
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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11
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Jia H, Qiu Z. Recent Advances in Transition Metal-Catalyzed B—H Bond Activation for Synthesis of o-Carborane Derivatives with B—Heteroatom Bond. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202211040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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12
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Sivaev IB, Anufriev SA, Shmalko AV. How substituents at boron atoms affect the CH-acidity and the electron-withdrawing effect of the ortho-carborane cage: A close look on the 1H NMR spectra. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Huang R, Wang C, Tan D, Wang K, Zou B, Shao Y, Liu T, Peng H, Liu X, Fang Y. Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions. Angew Chem Int Ed Engl 2022; 61:e202211106. [DOI: 10.1002/anie.202211106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Rongrong Huang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education) School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710119 P. R. China
| | - Chao Wang
- Fluorescence Research Group Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
| | - Davin Tan
- Fluorescence Research Group Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
| | - Kai Wang
- State Key Laboratory of Superhard Materials Jilin University Changchun Jilin 130012 P. R. China
| | - Bo Zou
- State Key Laboratory of Superhard Materials Jilin University Changchun Jilin 130012 P. R. China
| | - Yangtao Shao
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education) School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710119 P. R. China
| | - Taihong Liu
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education) School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710119 P. R. China
| | - Haonan Peng
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education) School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710119 P. R. China
| | - Xiaogang Liu
- Fluorescence Research Group Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore
| | - Yu Fang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education) School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710119 P. R. China
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14
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Chen M, Xu J, Zhao D, Sun F, Tian S, Tu D, Lu C, Yan H. Site-Selective Functionalization of Carboranes at the Electron-Rich Boron Vertex: Photocatalytic B-C Coupling via a Carboranyl Cage Radical. Angew Chem Int Ed Engl 2022; 61:e202205672. [PMID: 35670361 DOI: 10.1002/anie.202205672] [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: 04/18/2022] [Indexed: 12/14/2022]
Abstract
Functionalization of carboranes in a vertex-specific manner is a perennial challenge. Here, we report a photocatalytic B-C coupling for the selective functionalization of carboranes at the boron site which is most distal to carbon. This reaction was achieved by the photo-induced decarboxylation of carborane carboxylic acids to generate boron vertex-centered carboranyl radicals. Theoretical calculations also demonstrate that the reaction more easily occurs at the boron site bearing higher electron density owing to the lower energy barrier for a single-electron transfer to generate a carboranyl radical. By using this strategy, a number of functionalized carboranes could be accessed through alkylation, alkenylation, and heteroarylation under mild conditions. Moreover, both a highly efficient blue emitter with a solid-state luminous efficiency of 42 % and a drug candidate for boron neutron capture therapy (BNCT) containing targeting and fluorine units were obtained.
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Affiliation(s)
- Meng Chen
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jingkai Xu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Deshi Zhao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Fangxiang Sun
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Songlin Tian
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Deshuang Tu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Changsheng Lu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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15
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Huang R, Wang C, Tan D, Wang K, Zou B, Shao Y, Liu T, Peng H, Liu X, Fang Y. Single‐Fluorophore‐Based Organic Crystals with Distinct Conformers Enabling Wide‐Range Excitation‐Dependent Emissions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211106] [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)
- Rongrong Huang
- Shaanxi Normal University School of Chemistry and Chemical Engineering CHINA
| | - Chao Wang
- Singapore University of Technology and Design Science, Math and Technology SINGAPORE
| | - Davin Tan
- Singapore University of Technology and Design Science, Math and Technology SINGAPORE
| | - Kai Wang
- Jilin University State Key Laboratory of Superhard Materials CHINA
| | - Bo Zou
- Jilin University State Key Laboratory of Superhard Materials CHINA
| | - Yangtao Shao
- Shaanxi Normal University School of Chemistry and Chemical Engineering CHINA
| | - Taihong Liu
- Shaanxi Normal University School of Chemistry and Chemical Engineering CHINA
| | - Haonan Peng
- Shaanxi Normal University School of Chemistry and Chemical Engineering CHINA
| | - Xiaogang Liu
- Singapore University of Technology and Design 8 Somapah Road487372Singapore 487372 Singapore SINGAPORE
| | - Yu Fang
- Shaanxi Normal University School of Chemistry and Chemical Engineering CHINA
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16
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Zhang J, Xie Z. N-Ligand-Enabled Aromatic Nucleophilic Amination of 1,2-Diaryl-o-Carboranes with (R 2 N) 2 Mg for Selective Synthesis of 4-R 2 N-o-Carboranes and 2-R 2 N-m-Carboranes. Angew Chem Int Ed Engl 2022; 61:e202202675. [PMID: 35579912 DOI: 10.1002/anie.202202675] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Indexed: 11/08/2022]
Abstract
The nucleophilic aromatic BH substitution reaction of carboranes is uncommon, compared to the electrophilic one. This work reported a pyridine-enabled transition-metal-free regioselective nucleophilic aromatic cage B(4)-H amination of 1,2-diaryl-o-carboranes with magnesium bisamides, giving a series of B(4)-aminated o-carboranes. DFT calculations showcased a stepwise B-N formation/B-H cleavage process, in which Mg-H formation/cage closure is the rate-determining step. Unprecedentedly, in the presence of 4,4'-di-tert-butyl-2,2'-dipyridyl (dtbpy), a tandem B(4)-amination/cage isomerization reaction of o-carboranes was discovered for the facile preparation of B(2)-aminated m-carboranes. Control experiments indicated that magnesium complex, bidentate ligand (dtbpy) and reaction temperature were crucial in the cage isomerization process. This direct nucleophilic aromatic cage B-H amination reaction offers an alternative strategy for selective amination of o- and m-carboranes.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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17
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Sha Y, Zhou Z, Zhu M, Luo Z, Xu E, Li X, Yan H. The Mechanochemistry of Carboranes. Angew Chem Int Ed Engl 2022; 61:e202203169. [DOI: 10.1002/anie.202203169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Ye Sha
- Department of Chemistry and Material Science College of Science Nanjing Forestry University Nanjing 210037 China
| | - Zhou Zhou
- Department of Chemistry and Material Science College of Science Nanjing Forestry University Nanjing 210037 China
| | - Miao Zhu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Science Nanjing Agricultural University Nanjing 210095 China
| | - Zhenyang Luo
- Department of Chemistry and Material Science College of Science Nanjing Forestry University Nanjing 210037 China
| | - Enhua Xu
- Graduate School of System Informatics Kobe University Kobe 657-8501 Japan
| | - Xiang Li
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Science Nanjing Agricultural University Nanjing 210095 China
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry Nanjing University Nanjing 210023 China
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18
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Zhang J, Xie Z. N‐Ligand‐Enabled Aromatic Nucleophilic Amination of 1,2‐Diaryl‐
o
‐Carboranes with (R
2
N)
2
Mg for Selective Synthesis of 4‐R
2
N‐
o
‐Carboranes and 2‐R
2
N‐
m
‐Carboranes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202675] [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)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry The Chinese University of Hong Kong Shatin, New Territories, Hong Kong China
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19
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Chen M, Xu J, Zhao D, Sun F, Tian S, Tu D, Lu C, Yan H. Site‐Selective Functionalization of Carboranes at Electron‐Rich Boron Vertex: Photocatalytic B‐C Coupling via a Carboranyl Cage Radical. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Meng Chen
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Jingkai Xu
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Deshi Zhao
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Fangxiang Sun
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Songlin Tian
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Deshuang Tu
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Changsheng Lu
- Nanjing University School of Chemistry and Chemical Engineering CHINA
| | - Hong Yan
- Nanjing University School of Chemistry and Chemical Engineering 22 Hankou Rd. 210093 Nanjing CHINA
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20
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Sha Y, Zhou Z, Zhu M, Luo Z, Xu E, Li X, Yan H. The Mechanochemistry of Carboranes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ye Sha
- Nanjing Forestry University Chemistry and Biochemistry 159 Longpan StNanjing Forestry University 210037 Nanjing CHINA
| | - Zhou Zhou
- Nanjing Forestry University Chemistry CHINA
| | - Miao Zhu
- Nanjing Agricultural University Chemistry CHINA
| | | | - Enhua Xu
- Kobe University Graduate School of System Informatics: Kobe Daigaku Daigakuin System Johogaku Kenkyuka Chemistry JAPAN
| | - Xiang Li
- Nanjing Agricultural University Chemistry CHINA
| | - Hong Yan
- Nanjing University Chemistry CHINA
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21
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Abstract
Synthesis, NMR spectral data and crystal structure of 9,12-dibromo derivative of ortho-carborane are reported.
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22
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Bischof T, Guo X, Krummenacher I, Beßler L, Lin Z, Finze M, Braunschweig H. Alkene insertion reactivity of a o-carboranyl-substituted 9-borafluorene. Chem Sci 2022; 13:7492-7497. [PMID: 35872816 PMCID: PMC9244080 DOI: 10.1039/d2sc02750j] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/01/2022] [Indexed: 11/24/2022] Open
Abstract
The synthesis of 9-borafluorene with an electron-withdrawing o-carboranyl substituent and its reactions with a series of alkenes are described. The o-carboranyl substituent is bonded via one of the cluster carbon atoms to the boron atom of the 9-borafluorene moiety. In all cases, the reactions afford partly saturated analogs of borepins (i.e. 6,7-dihydroborepins) by unprecedented alkene insertion into the endocyclic B–C bond of the borole ring. Comparative studies with 9-bromo-9-borafluorene illustrate the superior insertion reactivity of the carboranyl-substituted derivative. A suite of experimental and computational techniques disclose the unique properties of the 9-borafluorene and provide insight into how the 9-carboranyl substituent affects its chemical reactivity. A 9-carboranyl-substituted 9-borafluorene is reported, which is capable of undergoing efficient ring expansion to 6,7-dihydroborepins by a previously unknown alkene insertion.![]()
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Affiliation(s)
- Tobias Bischof
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Xueying Guo
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Lukas Beßler
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China
| | - Maik Finze
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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23
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Liu J, Fu D, Chen Z, Li T, Qu LB, Li SJ, Zhang W, Lan Y. Regioselectivity of Pd-catalyzed o-carborane arylation: a theoretical view. Org Chem Front 2022. [DOI: 10.1039/d2qo00046f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
B(3)-Arylation is unfavorable because the steric repulsion between the substituent group on C(2) and the metal moiety would lead to significant distortion of o-carborane and would result in a higher activation energy for reductive elimination.
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Affiliation(s)
- Jiying Liu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Dongmin Fu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Zitong Chen
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Tiantian Li
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Ling-Bo Qu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Shi-Jun Li
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Wenjing Zhang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yu Lan
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
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24
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Cheng B, Chen Y, Zhou P, Xie Z. Rhodium-catalyzed sequential B(3)-, B(4)-, and B(5)-trifunctionalization of o-carboranes with three different substituents. Chem Commun (Camb) 2021; 58:629-632. [PMID: 34913450 DOI: 10.1039/d1cc05936j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A rhodium-catalyzed one-pot trifunctionalization of o-carboranes with three different substituents via a carboxy group directed sequential B(5)-alkenylation, B(4)-alkyne annulation and B(3)-acyloxylation has been developed for the first time, leading to the synthesis of a new class of B(3,4,5)-trisubstituted o-carborane derivatives. Treatment of 1-COOH-2-CH3-o-C2B10H10 with ArCCAr in the presence of a [Cp*RhCl2]2 catalyst and a Cu(OPiv)2 oxidant gave 1,4-[COOC(Ar)C(Ar)]-2-Me-3-OPiv-5-[C(Ar)CH(Ar)-o-C2B10H7 in good to high yields. This protocol represents a new strategy for the catalytic selective polyfunctionalization of carboranes with different substituents.
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Affiliation(s)
- Biao Cheng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
| | - Yu Chen
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
| | - Peng Zhou
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China.
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25
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Synthesis of 3-Aryl- ortho-carboranes with Sensitive Functional Groups. Molecules 2021; 26:molecules26237297. [PMID: 34885881 PMCID: PMC8659134 DOI: 10.3390/molecules26237297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/16/2022] Open
Abstract
A simple and efficient method was developed for the one-pot synthesis of 3-aryl derivatives of ortho-carborane with sensitive functional groups using 3-iodo-ortho-carborane and aryl zinc bromides that were generated in situ. A series of 3-aryl-ortho-carboranes, including those containing nitrile and ester groups, 3-RC6H4-1,2-C2B10H11 (R = p-Me, p-NMe2, p-OCH2OMe, p-OMe, o-CN, p-CN, o-COOEt, m-COOEt, p-COOEt) was synthesized using this approach. The solid-state structures of 3-RC6H4-1,2-C2B10H11 (R = p-OMe, o-CN, and p-CN) were determined by single crystal X-ray diffraction. The intramolecular hydrogen bonding involving the ortho-substituents of the aryl ring and the CH and BH groups of carborane was discussed.
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26
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Yang L, Jei BB, Scheremetjew A, Yuan B, Stückl AC, Ackermann L. Electrooxidative o-carborane chalcogenations without directing groups: cage activation by copper catalysis at room temperature. Chem Sci 2021; 12:12971-12976. [PMID: 34745527 PMCID: PMC8513870 DOI: 10.1039/d1sc02905c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 08/28/2021] [Indexed: 11/21/2022] Open
Abstract
Copper-catalyzed electrochemical direct chalcogenations of o-carboranes was established at room temperature. Thereby, a series of cage C-sulfenylated and C-selenylated o-carboranes anchored with valuable functional groups was accessed with high levels of position- and chemo-selectivity control. The cupraelectrocatalysis provided efficient means to activate otherwise inert cage C-H bonds for the late-stage diversification of o-carboranes.
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Affiliation(s)
- Long Yang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany http://www.ackermann.chemie.uni-goettingen.de/
| | - Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany http://www.ackermann.chemie.uni-goettingen.de/
| | - Alexej Scheremetjew
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany http://www.ackermann.chemie.uni-goettingen.de/
| | - Binbin Yuan
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany http://www.ackermann.chemie.uni-goettingen.de/
| | - A Claudia Stückl
- Institut für Anorganische Chemie, Georg-August-Universität Göttingen Tammannstraße 4 37077 Gottingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany http://www.ackermann.chemie.uni-goettingen.de/
- Woehler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
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27
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Cheng B, Chen Y, Xie Z. Iridium-Catalyzed Annulation of o-Carboranyl Carboxylic Acids with Alkynes: Synthesis of Carborano-Isocoumarins. J Org Chem 2021; 86:12412-12418. [PMID: 34365793 DOI: 10.1021/acs.joc.1c01395] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
An efficient iridium-catalyzed formal [4+2] annulation of carboranyl carboxylic acids with alkynes is developed, resulting in the facile synthesis of a new class of carborano-isocoumarin derivatives. The carboxyl group not only serves as a directing group to control the regioselectivity but also ingeniously becomes a part of the final products. The reaction mechanism involves sequential carboxyl-directed B(4)-H metalation, alkyne insertion, and reductive elimination.
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Affiliation(s)
- Biao Cheng
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yu Chen
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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28
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Conway-Kenny R, Ferrer-Ugalde A, Careta O, Cui X, Zhao J, Nogués C, Núñez R, Cabrera-González J, Draper SM. Ru(ii) and Ir(iii) phenanthroline-based photosensitisers bearing o-carborane: PDT agents with boron carriers for potential BNCT. Biomater Sci 2021; 9:5691-5702. [PMID: 34264257 DOI: 10.1039/d1bm00730k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four novel transition metal-carborane photosensitisers were prepared by Sonogashira cross-coupling of 1-(4-ethynylbenzyl)-2-methyl-o-carborane (A-CB) with halogenated Ru(ii)- or Ir(iii)-phenanthroline complexes. The resulting boron-rich complexes with one (RuCB and IrCB) or two carborane cages (RuCB2 and IrCB2) were spectroscopically characterised, and their photophysical properties investigated. RuCB displayed the most attractive photophysical properties in solution (λem 635 nm, τT 2.53 μs, and φp 20.4%). Nanosecond time-resolved transient absorption studies were used to explore the 3MLCT nature of the triplet excited states, and the highest singlet oxygen quantum yields (ΦΔ) were obtained for the mono-carborane-phenanthroline complexes (RuCB: 52% and IrCB: 25%). None of the complexes produce dark toxicity in SKBR-3 cells after incubation under photodynamic therapy (PDT) conditions. Remarkably, mono-carboranes RuCB and IrCB were the best internalised by the SKBR-3 cells, demonstrating the first examples of tris-bidentate transition metal-carborane complexes acting as triplet photosensitisers for PDT with a high photoactivity; RuCB or IrCB killed ∼50% of SKBR-3 cells at 10 μM after irradiation. Therefore, the high-boron content and the photoactive properties of these photosensitisers make them potential candidates as dual anti-cancer agents for PDT and Boron Neutron Capture Therapy (BNCT).
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Affiliation(s)
- Robert Conway-Kenny
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
| | - Albert Ferrer-Ugalde
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193-Bellatera, Barcelona, Spain
| | - Oriol Careta
- Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain.
| | - Xiaoneng Cui
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland. and State Key Laboratory of Fine Chemicals, Dalian University of Technology, E208 Western Campus, 2 Ling-Gong Road, Dalian 116012, P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, E208 Western Campus, 2 Ling-Gong Road, Dalian 116012, P. R. China
| | - Carme Nogués
- Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain.
| | - Rosario Núñez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193-Bellatera, Barcelona, Spain
| | | | - Sylvia M Draper
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
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29
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Zhang J, Xie Z. Ene Reaction of o-Carboryne with Alkynes and Alkenes at Room Temperature: Synthesis of o-Carboranyl Allenes and Alkenes. Org Lett 2021; 23:2971-2975. [PMID: 33797268 DOI: 10.1021/acs.orglett.1c00649] [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
o-Carboryne undergoes at room temperature an efficient ene reaction with a large variety of alkynes and alkenes possessing an α-CH proton to give a series of o-carboranyl allenes and alkenes in good to high isolated yields. This reaction has a broad substrate scope from alkyl and aryl to silyl substituents. This protocol provides a facile synthetic method for accessing cage C-substituted carboranyl allenes and alkenes, which may be utilized as useful starting materials to synthesize multifunctionalized carboranes.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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30
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Au YK, Xie Z. Recent Advances in Transition Metal-Catalyzed Selective B-H Functionalization ofo-Carboranes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200366] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yik Ki Au
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, P. R. China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, P. R. China
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31
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Zhang J, Xie Z. Tandem [4 + 2]/[2 + 2] cycloaddition of o-carboryne with enynes: facile construction of carborane-fused tricyclics. Chem Sci 2021; 12:5616-5620. [PMID: 34168796 PMCID: PMC8179614 DOI: 10.1039/d0sc07047e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 02/19/2021] [Indexed: 11/21/2022] Open
Abstract
o-Carboryne (1,2-dehydro-o-carborane) is a very useful synthon for the synthesis of a variety of carborane-functionalized molecules. With 1-Li-2-OTf-o-C2B10H10 as the precursor, o-carboryne undergoes an efficient [4 + 2] cycloaddition with various conjugated enynes, followed by a subsequent [2 + 2] cycloaddition at room temperature, generating a series of carborane-fused tricyclo[6.4.0.02,7]dodeca-2,12-dienes in moderate to high isolated yields. This reaction is compatible with many functional groups and has a broad substrate scope. A reactive carborane-fused 1,2-cyclohexadiene intermediate is involved, which is supported by experimental results and DFT calculations. This protocol offers a convenient strategy for the construction of complex carborane-functionalized tricyclics.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
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32
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Yao ZJ, Jin YX, Deng W, Liu ZJ. Synthesis and Optoelectronic Properties of Cationic Iridium(III) Complexes with o-Carborane-Based 2-Phenyl Benzothiazole Ligands. Inorg Chem 2021; 60:2756-2763. [PMID: 33480675 DOI: 10.1021/acs.inorgchem.0c03625] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A series of cationic cyclometalated iridium(III) complexes with o-carborane cage on the main ligand of 2-phenylbenzothiazole were synthesized. The prepared iridium complexes (C1-C6) were fully characterized by UV-vis, NMR, and FT-IR spectra. The exact molecular structure of complex C1 was further studied by single crystal X-ray diffraction analysis. The different substitution position of o-carborane on the 2-phenylbenzothiazole ring lead to obvious differences in the emission properties of the synthesized complexes. The o-carboranyl unit results in a bathochromic shift of 10 nm in the fluorescence emission spectrum of C2. In addition, the presence of an o-carborane fragment promoted the strong fluorescence intensity of C1 and C4, which can be used as a tool to effectively boost the intensity of fluorescence properties. The emission fluorescent behavior of iridium(III) complexes can be facilely tuned by structural variations in the main ligands of these materials.
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Affiliation(s)
- Zi-Jian Yao
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China.,Key Lab of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Yong-Xu Jin
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Wei Deng
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Zhen-Jiang Liu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, China
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33
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Yang L, Bongsuiru Jei B, Scheremetjew A, Kuniyil R, Ackermann L. Electrochemical B-H Nitrogenation: Access to Amino Acid and BODIPY-Labeled nido-Carboranes. Angew Chem Int Ed Engl 2021; 60:1482-1487. [PMID: 32991021 PMCID: PMC7839532 DOI: 10.1002/anie.202012105] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Indexed: 12/16/2022]
Abstract
Electrocatalyzed oxidative B-H nitrogenations of nido-carborane (nido-7,8-C2 B9 H12- ) with N-heterocycles have been established, enabling the preparation of various N-substituted nido-carboranes without chemical oxidants or metal catalyst under ambient conditions. The electrolysis manifold occurred with high levels of efficiency as well as chemo- and position- selectivity, employing sustainable electricity as the sole oxidant. The strategy set the stage for a user-friendly access to novel amino acid and fluorogenic boron-dipyrrin (BODIPY)-labeled nido-carborane hybrids.
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Affiliation(s)
- Long Yang
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Alexej Scheremetjew
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable ChemistryGeorg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
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34
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Ol'shevskaya VA, Alpatova VM, Makarenkov AV, Kononova EG, Smol’yakov AF, Peregudov AS, Rys EG. Synthesis of maleimide-functionalized carboranes and their utility in Michael addition reactions. NEW J CHEM 2021. [DOI: 10.1039/d1nj02499j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Carboranyl maleimides were obtained and their reactivity with S- and N-nucleophiles was demonstrated.
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Affiliation(s)
- Valentina A. Ol'shevskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Victoria M. Alpatova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Anton V. Makarenkov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Elena G. Kononova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Alexander F. Smol’yakov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Alexander S. Peregudov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Evgeny G. Rys
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
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35
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Cui P, Gao Y, Guo S, Jin G. Regioselective B—H/C—H Bond Activation at
Azo‐Substituted
Carboranes Induced by
Half‐Sandwich
Iridium(
III
) Complex. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Peng‐Fei Cui
- Department of Chemistry, Fudan University, State Key Laboratory of Molecular Engineering of Polymers Shanghai 200433 China
| | - Yang Gao
- Department of Chemistry, Fudan University, State Key Laboratory of Molecular Engineering of Polymers Shanghai 200433 China
| | - Shu‐Ting Guo
- Department of Chemistry, Fudan University, State Key Laboratory of Molecular Engineering of Polymers Shanghai 200433 China
| | - Guo‐Xin Jin
- Department of Chemistry, Fudan University, State Key Laboratory of Molecular Engineering of Polymers Shanghai 200433 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences Shanghai 200032 China
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36
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Wu J, Cao K, Zhang CY, Xu TT, Wen XY, Li B, Yang J. Palladium Catalyzed Selective B(3)-H Activation/Oxidative Dehydrogenative Coupling for the Synthesis of Bis( o-carborane)s. Inorg Chem 2020; 59:17340-17346. [PMID: 33232154 DOI: 10.1021/acs.inorgchem.0c02638] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A palladium catalyzed selective B(3)-H activation/oxidative dehydrogenative coupling for the synthesis of bis(o-carborane)s connected with B(3)-B(3') and B(3)-B(6') bonds has been developed for the first time. A plausible mechanism involving stepwise activation of B(3)-H and B(3'/6')-H bonds by PdII and PdIV was proposed. This work is the first example and the most efficient protocol for synthesis of bis(o-carborane)s connected with B(3)-B(3') and B(3)-B(6') bonds, which has important reference for design, synthesis, and application of bis(o-carborane)s in related fields.
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Affiliation(s)
- Ji Wu
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Ke Cao
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Cai-Yan Zhang
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Tao-Tao Xu
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Xin-Yu Wen
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Bo Li
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, P. R. China
| | - Junxiao Yang
- State Key Laboratory of Environment-friendly Energy Materials & School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
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37
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Yang L, Bongsuiru Jei B, Scheremetjew A, Kuniyil R, Ackermann L. Elektrochemische B‐H‐Nitrogenierung: Zugang zu Aminosäure‐ und BODIPY‐markierten
nido
‐Carboranen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012105] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Long Yang
- Institut für Organische und Biomolekulare Chemie und Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Deutschland
| | - Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie und Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Deutschland
| | - Alexej Scheremetjew
- Institut für Organische und Biomolekulare Chemie und Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Deutschland
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare Chemie und Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Deutschland
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie und Wöhler Research Institute for Sustainable Chemistry Georg-August-Universität Göttingen Tammannstrasse 2 37077 Göttingen Deutschland
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38
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Smyshliaeva LA, Varaksin MV, Fomina EI, Joy MN, Bakulev VA, Charushin VN, Chupakhin ON. Cu(I)-Catalyzed Cycloaddition of Vinylacetylene ortho-Carborane and Arylazides in the Design of 1,2,3-Triazolyl-Modified Vinylcarborane Fluorophores. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00478] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Lidia A. Smyshliaeva
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia
- Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Street, 620990 Ekaterinburg, Russia
| | - Mikhail V. Varaksin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia
- Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Street, 620990 Ekaterinburg, Russia
| | | | | | - Vasiliy A. Bakulev
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia
- Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Street, 620990 Ekaterinburg, Russia
| | - Valery N. Charushin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia
- Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Street, 620990 Ekaterinburg, Russia
| | - Oleg N. Chupakhin
- Ural Federal University, 19 Mira Str., 620002 Ekaterinburg, Russia
- Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, 22 S. Kovalevskaya Street, 620990 Ekaterinburg, Russia
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39
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Cheng R, Qiu Z, Xie Z. Palladium‐Catalyzed
Oxidative Annulation of
1‐Hydroxy‐
o
‐Carborane
with Internal Alkynes: Facile Synthesis of
Carborane‐Fused
Oxaboroles
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ruofei Cheng
- Shanghai‐Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Rd Shanghai 200032 China
| | - Zaozao Qiu
- Shanghai‐Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Rd Shanghai 200032 China
- CAS Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Rd Shanghai 200032 China
- Fujian Innovation Academy, Chinese Academy of Sciences 155 Yangqiao Rd West Fuzhou Fujian 350002 China
| | - Zuowei Xie
- Shanghai‐Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Rd Shanghai 200032 China
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong, China
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40
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Zhang J, Tang C, Xie Z. Magnesium-mediated sp 3 C-H activation in cascade cyclization of 1-arylethynyl-2-alkyl- o-carboranes: efficient synthesis of carborane-fused cyclopentanes. Chem Sci 2020; 11:9925-9929. [PMID: 34094253 PMCID: PMC8162123 DOI: 10.1039/d0sc04465b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 09/01/2020] [Indexed: 01/03/2023] Open
Abstract
This work reports an unprecedented cascade cyclization of 1-arylethynyl-2-alkyl-o-carboranes promoted by magnesium-mediated sp3 C-H activation. Treatment of 1-arylethynyl-2-alkyl-o-carboranes with MeMgBr gives a series of carborane-fused cyclopentanes in very good yields. Deuterium labelling and control experiments suggest that HMgBr, resulting in situ from the nucleophilic substitution of cage B-H bonds with Grignard reagent, initiates the reaction, in which magnesium-promoted intramolecular sp3 C-H activation serves as a key step. This work not only offers a new route for the synthesis of carborane-fused cyclopentanes, but also sheds some light on Mg-mediated C-H activation and functionalization.
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Affiliation(s)
- Jie Zhang
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| | - Cen Tang
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry, State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N. T. Hong Kong China
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41
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Au YK, Quan Y, Xie Z. Palladium‐Catalyzed Carbonylative Annulation of 1‐Hydroxy‐
o
‐Carborane and Internal Alkynes via Regioselective B‐H Activation. Chem Asian J 2020; 15:2170-2173. [DOI: 10.1002/asia.202000642] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/12/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Yik Ki Au
- Department of Chemistry and State Key Laboratory of Synthetic ChemistryThe Chinese University of Hong Kong Shatin, N.T. Hong Kong China
| | - Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic ChemistryThe Chinese University of Hong Kong Shatin, N.T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic ChemistryThe Chinese University of Hong Kong Shatin, N.T. Hong Kong China
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42
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Golub IE, Filippov OA, Kulikova VA, Belkova NV, Epstein LM, Shubina ES. Thermodynamic Hydricity of Small Borane Clusters and Polyhedral closo-Boranes. Molecules 2020; 25:molecules25122920. [PMID: 32630429 PMCID: PMC7357072 DOI: 10.3390/molecules25122920] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 06/21/2020] [Accepted: 06/23/2020] [Indexed: 01/02/2023] Open
Abstract
Thermodynamic hydricity (HDAMeCN) determined as Gibbs free energy (ΔG°[H]−) of the H− detachment reaction in acetonitrile (MeCN) was assessed for 144 small borane clusters (up to 5 boron atoms), polyhedral closo-boranes dianions [BnHn]2−, and their lithium salts Li2[BnHn] (n = 5–17) by DFT method [M06/6-311++G(d,p)] taking into account non-specific solvent effect (SMD model). Thermodynamic hydricity values of diborane B2H6 (HDAMeCN = 82.1 kcal/mol) and its dianion [B2H6]2− (HDAMeCN = 40.9 kcal/mol for Li2[B2H6]) can be selected as border points for the range of borane clusters’ reactivity. Borane clusters with HDAMeCN below 41 kcal/mol are strong hydride donors capable of reducing CO2 (HDAMeCN = 44 kcal/mol for HCO2−), whereas those with HDAMeCN over 82 kcal/mol, predominately neutral boranes, are weak hydride donors and less prone to hydride transfer than to proton transfer (e.g., B2H6, B4H10, B5H11, etc.). The HDAMeCN values of closo-boranes are found to directly depend on the coordination number of the boron atom from which hydride detachment and stabilization of quasi-borinium cation takes place. In general, the larger the coordination number (CN) of a boron atom, the lower the value of HDAMeCN.
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Affiliation(s)
- Igor E Golub
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Oleg A Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Vasilisa A Kulikova
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
- Faculty of Chemistry, M.V. Lomonosov Moscow State University, 1/3 Leninskiye Gory, 119991 Moscow, Russia
| | - Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Lina M Epstein
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
| | - Elena S Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds and Russian Academy of Sciences (INEOS RAS), 28 Vavilova St, 119991 Moscow, Russia
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43
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Kushakova NS, Naumkin AV, Suntsova IB, Kupriyanova DV, Kharitonova VG, Babich SA, Kovalev AI, Khotina IA. Polyazomethine and polyphenylene based on 1,2-bis(4-acetylbenzyl)-o-carborane. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2880-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Baek Y, Cheong K, Ko GH, Han GU, Han SH, Kim D, Lee K, Lee PH. Iridium-Catalyzed Cyclative Indenylation and Dienylation through Sequential B(4)–C Bond Formation, Cyclization, and Elimination from o-Carboranes and Propargyl Alcohols. J Am Chem Soc 2020; 142:9890-9895. [DOI: 10.1021/jacs.0c02121] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yonghyeon Baek
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kiun Cheong
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Gi Hoon Ko
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Gi Uk Han
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sang Hoon Han
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Kooyeon Lee
- Department of Bio-Health Technology, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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45
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Liang YF, Yang L, Jei BB, Kuniyil R, Ackermann L. Regioselective B(3,4)-H arylation of o-carboranes by weak amide coordination at room temperature. Chem Sci 2020; 11:10764-10769. [PMID: 34094330 PMCID: PMC8162305 DOI: 10.1039/d0sc01515f] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/03/2020] [Indexed: 01/17/2023] Open
Abstract
Palladium-catalyzed regioselective di- or mono-arylation of o-carboranes was achieved using weakly coordinating amides at room temperature. Therefore, a series of B(3,4)-diarylated and B(3)-monoarylated o-carboranes anchored with valuable functional groups were accessed for the first time. This strategy provided an efficient approach for the selective activation of B(3,4)-H bonds for regioselective functionalizations of o-carboranes.
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Affiliation(s)
- Yu-Feng Liang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Long Yang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
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46
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Zhang J, Xie Z. [2 + 2] Cycloaddition of o-Carboryne with Vinyl Ethers: Synthesis of Carborane-Fused Cyclobutanes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00163] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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47
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Zhang Z, Zhang X, Yuan J, Yue C, Meng S, Chen J, Yu G, Che C. Transition‐Metal‐Catalyzed Regioselective Functionalization of Monophosphino‐
o‐
Carboranes. Chemistry 2020; 26:5037-5050. [DOI: 10.1002/chem.201905647] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/28/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Zi‐Yang Zhang
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Xuepeng Zhang
- Laboratory of Computational and Drug DesignSchool of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 P. R. China
- School of Chemistry and Chemical EngineeringShaanxi Normal University Xi'an 710119 P. R. China
| | - Jia Yuan
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Chang‐Duo Yue
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Sixuan Meng
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Jian Chen
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Guang‐Ao Yu
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Chi‐Ming Che
- State Key Laboratory of Synthetic Chemistry andDepartment of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation Shenzhen, Guangdong 518057 P. R. China
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48
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Chen Y, Quan Y, Xie Z. Ir-catalyzed selective dehydrogenative cross-coupling of aryls with o-carboranes via a mixed directing-group strategy. Chem Commun (Camb) 2020; 56:7001-7004. [DOI: 10.1039/d0cc02531c] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ir-catalyzed highly selective B–H/C–H cross dehydrogenative coupling between o-carboranes and (hetero)aryls has been achieved using a mixed directing-group strategy.
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Affiliation(s)
- Yu Chen
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin
- China
| | - Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin
- China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin
- China
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49
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Zhang C, Wang Q, Tian S, Zhang J, Li J, Zhou L, Lu J. Palladium-catalyzed regioselective synthesis of B(4,5)- or B(4)-substituted o-carboranes containing α,β-unsaturated carbonyls. Org Biomol Chem 2020; 18:4723-4727. [DOI: 10.1039/d0ob00698j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
B(4,5)- or B(4)-Substituted o-carboranes containing α,β-unsaturated carbonyls are regioselectively synthesized through a Pd-catalyzed decarboxylation cross coupling reaction.
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Affiliation(s)
- Chuyi Zhang
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
| | - Qian Wang
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
| | - Song Tian
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
| | - Jianwei Zhang
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
| | - Jiaoyi Li
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule of Ministry of Education
- Department of Chemistry & Materials Science
- National Demonstration Center for Experimental Chemistry Education
- Northwest University
- Xi'an
| | - Jian Lu
- State Key Laboratory of Fluorine & Nitrogen Chemicals
- Xi'an Modern Chemistry Research Institute
- Xi'an 710065
- China
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50
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Piña MDLN, Bauzá A, Frontera A. Halogen⋯halogen interactions in decahalo-closo-carboranes: CSD analysis and theoretical study. Phys Chem Chem Phys 2020; 22:6122-6130. [DOI: 10.1039/d0cp00114g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We theoretically (PBE0-D3/def2TZVP) and experimentally (CSD analysis) demonstrate the importance of “like–like” halogen interactions for the stability of several decahalo-closo-carborane dimers.
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Affiliation(s)
- Maria de las Nieves Piña
- Department of Chemistry Universitat de les Illes Balears
- Crta. de Valldemossa km 7.5
- 07122 Palma (Baleares)
- Spain
| | - Antonio Bauzá
- Department of Chemistry Universitat de les Illes Balears
- Crta. de Valldemossa km 7.5
- 07122 Palma (Baleares)
- Spain
| | - Antonio Frontera
- Department of Chemistry Universitat de les Illes Balears
- Crta. de Valldemossa km 7.5
- 07122 Palma (Baleares)
- Spain
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