1
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Liu XR, Cui PF, García-Rodeja Y, Solà M, Jin GX. Formation and reactivity of a unique M⋯C-H interaction stabilized by carborane cages. Chem Sci 2024; 15:9274-9280. [PMID: 38903214 PMCID: PMC11186334 DOI: 10.1039/d4sc01158a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 05/16/2024] [Indexed: 06/22/2024] Open
Abstract
Broadening carborane applications has consistently been the goal of chemists in this field. Herein, compared to alkyl or aryl groups, a carborane cage demonstrates an advantage in stabilizing a unique bonding interaction: M⋯C-H interaction. Experimental results and theoretical calculations have revealed the characteristic of this two-center, two-electron bonding interaction, in which the carbon atom in the arene ring provides two electrons to the metal center. The reduced aromaticity of the benzene moiety, long distance between the metal and carbon atom in arene, and the upfield shift of the signal of M⋯C-H in the nuclear magnetic resonance spectrum distinguished this interaction from metal⋯C π interaction and metal-C(H) σ bonds. Control experiments demonstrate the unique electronic effects of carborane in stabilizing the M⋯C-H bonding interaction in organometallic chemistry. Furthermore, the M⋯C-H interaction can convert into C-H bond metallization under acidic conditions or via treatment with t-butyl isocyanide. These findings deepen our understanding regarding the interactions between metal centers and carbon atoms and provide new opportunities for the use of carboranes.
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Affiliation(s)
- Xin-Ran Liu
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University 2005 Songhu Road Shanghai 200433 P. R. China
| | - Peng-Fei Cui
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University 2005 Songhu Road Shanghai 200433 P. R. China
| | - Yago García-Rodeja
- Institut de Química Computacional i Catàlisi, Departament de Química, Universitat de Girona C/Maria Aurèlia Capmany, 69 17003 Girona Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi, Departament de Química, Universitat de Girona C/Maria Aurèlia Capmany, 69 17003 Girona Spain
| | - Guo-Xin Jin
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University 2005 Songhu Road Shanghai 200433 P. R. China
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2
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Huang JH, Liu YJ, Si Y, Cui Y, Dong XY, Zang SQ. Carborane-Cluster-Wrapped Copper Cluster with Cyclodextrin-like Cavities for Chiral Recognition. J Am Chem Soc 2024. [PMID: 38838264 DOI: 10.1021/jacs.4c04294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Chiral atomically precise metal clusters, known for their remarkable chiroptical properties, hold great potential for applications in chirality recognition. However, advancements in this field have been constrained by the limited exploration of host-guest chemistry, involving metal clusters. This study reports the synthesis of a chiral Cu16(C2B10H10S2)8 (denoted as Cu16@CB8, where C2B10H12S2H2 = 9,12-(HS)2-1,2-closo-carborane) cluster by an achiral carboranylthiolate ligand. The chiral R-/S-Cu16@CB8 cluster features chiral cavities reminiscent of cyclodextrins, which are surrounded by carborane clusters, yet they crystallize in a racemate. These cyclodextrin-like cavities demonstrated the specific recognition of amino acids, as indicated by the responsive output of circular dichroism and circularly polarized luminescence signals of Cu16 moieties of the Cu16@CB8 cluster. Notably, a quantitative chiroptical analysis of amino acids in a short time and a concomitant deracemization of Cu16@CB8 were achieved. Density functional tight-binding molecular dynamics simulation and noncovalent interaction analysis further unraveled the great importance of the cavities and binding sites for chiral recognition. Dipeptide, tripeptide, and polypeptide containing the corresponding amino acids (Cys, Arg, or His residues) display the same chiral recognition, showing the generality of this approach. The functional synergy of dual clusters, comprising carborane and metal clusters, is for the first time demonstrated in the Cu16@CB8 cluster, resulting in the valuable quantification of the enantiomeric excess (ee) value of amino acids. This work opens a new avenue for chirality sensors based on chiral metal clusters with unique chiroptical properties and inspires the development of carborane clusters in host-guest chemistry.
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Affiliation(s)
- Jia-Hong Huang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Ya-Jie Liu
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Yubing Si
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Yao Cui
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Xi-Yan Dong
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, China
| | - Shuang-Quan Zang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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3
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Huang J, Ji A, Wang Z, Wang Q, Zang S. Boosting 2000-Fold Hypergolic Ignition Rate of Carborane by Substitutes Migration in Metal Clusters. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2401861. [PMID: 38569464 PMCID: PMC11186111 DOI: 10.1002/advs.202401861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/20/2024] [Indexed: 04/05/2024]
Abstract
Hypergolic propellants rely on fuel and oxidizer that spontaneously ignite upon contact, which fulfill a wide variety of mission roles in launch vehicles and spacecraft. Energy-rich carboranes are promising hypergolic fuels, but triggering their energy release is quite difficult because of their ultrastable aromatic cage structure. To steer the development of carborane-based high-performance hypergolic material, carboranylthiolated compounds integrated with atomically precise copper clusters are presented, yielding two distinct isomers, Cu14B-S and Cu14C-S, both possessing similar ligands and core structures. With the migration of thiolate groups from carbon atoms to boron atoms, the ignition delay (ID) time shortened from 6870 to 3 ms when contacted with environmentally benign oxidizer high-test peroxide (HTP, with a H2O2 concentration of 90%). The extraordinarily short ignition ID time of Cu14B-S is ranking among the best of HTP-active hypergolic materials. The experimental and theoretical findings reveal that benefitting from the migration of thiolate groups, Cu14B-S, characterized by an electron-rich metal kernel, displays enhanced reducibility and superior charge transfer efficiency. This results in exceptional activation rates with HTP, consequently inducing carborane combustion and the simultaneous release of energy. This fundamental investigation shed light on the development of advanced green hypergolic propulsion systems.
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Affiliation(s)
- Jia‐Hong Huang
- Henan Key Laboratory of Crystalline Molecular Functional Materials, and College of ChemistryZhengzhou UniversityZhengzhou450001China
| | - Ao‐Qi Ji
- Henan Key Laboratory of Crystalline Molecular Functional Materials, and College of ChemistryZhengzhou UniversityZhengzhou450001China
| | - Zhao‐Yang Wang
- Henan Key Laboratory of Crystalline Molecular Functional Materials, and College of ChemistryZhengzhou UniversityZhengzhou450001China
| | - Qian‐You Wang
- Henan Key Laboratory of Crystalline Molecular Functional Materials, and College of ChemistryZhengzhou UniversityZhengzhou450001China
| | - Shuang‐Quan Zang
- Henan Key Laboratory of Crystalline Molecular Functional Materials, and College of ChemistryZhengzhou UniversityZhengzhou450001China
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4
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Riffle JR, Hemingway TM, Smith MD, Peryshkov DV. Synthesis and cluster structure distortions of biscarborane dithiol, thioether, and disulfide. Dalton Trans 2024; 53:4444-4450. [PMID: 38353929 DOI: 10.1039/d3dt04289h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
The synthesis and structural characterization of the first sulfur-containing derivatives of the C,C-biscarborane {ortho-C2B10}2 cluster - thiol, thioether, and disulfide - are reported. The biscarboranyl dithiol (1-HS-C2B10H10)2 exhibits an exceedingly long intracluster carbon-carbon bond length of 1.858(3) Å, which is attributed to the extensive interaction between the lone pairs of the thiol groups and the unoccupied molecular orbital of the carborane cluster. The structures of the doubly deprotonated biscarboranyl dithiolate anion (1-S-C2B10H10)22- with various counter cations feature an even longer carbon-carbon bond length of 2.062(10) Å within the cluster along with a short carbon-sulfur bond of 1.660(7) Å, both indicative of significant delocalization of electron density from the sulfur atoms into the cluster.
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Affiliation(s)
- Jared R Riffle
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Tyler M Hemingway
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Mark D Smith
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
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5
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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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6
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Yuan S, Zhang H, Qiu Z, Xie Z. Palladium-Catalyzed Regioselective B(3,5)-Dialkenylation and B(4)-Alkenylation of o-Carboranes. J Org Chem 2024; 89:2474-2479. [PMID: 38303606 DOI: 10.1021/acs.joc.3c02496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Picolyl group directed B(3,5)-dialkenylation and B(4)-monoalkenylation of o-carboranes has been developed with a very low palladium catalyst loading. The degree of substitution is determined by the cage C(2)-substituents due to steric reasons. On the basis of experimental results, a plausible mechanism is proposed including electrophilic palladation and alkyne insertion followed by protonation.
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Affiliation(s)
- Shasha Yuan
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, China
| | - Huifang Zhang
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 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, Shanghai 200032, China
- Innovation Institute of Carbon Neutrality and International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, 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, 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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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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8
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Chen F, Guo W, Ma YN, Chen X. 9,9'-Bis- o-carboranes: synthesis and exploration of properties. Chem Commun (Camb) 2024; 60:614-617. [PMID: 38100063 DOI: 10.1039/d3cc05041f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
A highly efficient Pd-catalyzed B(9)-H/B(9)-H oxidative dehydrogenation coupling of carboranes to synthesize 9,9'-bis-o-carboranes has been developed. The properties and derivatization of 9,9'-bis-o-carborane were also examined, which provided diverse bis-o-carborane derivatives and bis-nido-carborane.
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Affiliation(s)
- Feijing Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Wenjing Guo
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Yan-Na Ma
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Xuenian Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
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9
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Aher YN, Bhaduri N, Pawar AB. Advances in transition metal-catalyzed C-H amination strategies using anthranils. Org Biomol Chem 2023; 21:8794-8812. [PMID: 37901918 DOI: 10.1039/d3ob01421e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2023]
Abstract
Modern times have witnessed an uprise in the synthesis and derivatization of nitrogen-containing fused heterocycles. Amination reactions involving nitrene chemistry have always been the most convenient choice for the incorporation of a nitrogen atom in a molecule. The utilization of an open nitrene species harnesses harsh conditions. Hence, transition metal-catalyzed C-H amination reactions using aminating agents have been an attractive choice. Electrophilic aminating agents for C-H amination reactions are well exploited due to their desirable reaction conditions. Out of all, anthranils have paved the way forward due to their utility in simultaneously forming two new functional groups (amine and carbonyl). Amination using anthranils follows a metal-nitrenoid pathway. Often, the amination has been followed by a Lewis acid or transition metal-mediated intramolecular cyclization to directly produce fused heterocycles. This review broadly demonstrates the utilization of anthranils as an aminating agent for transition metal-catalyzed C-H amination reactions. The focus has been given to the scope, limitations, and mechanistic understanding of using such an electrophilic aminating agent, anthranil, with transition metals.
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Affiliation(s)
- Yogesh N Aher
- School of Chemical Sciences, Indian Institute of Technology Mandi, Himachal Pradesh, 175075, India.
| | - Nilanjan Bhaduri
- School of Chemical Sciences, Indian Institute of Technology Mandi, Himachal Pradesh, 175075, India.
| | - Amit B Pawar
- School of Chemical Sciences, Indian Institute of Technology Mandi, Himachal Pradesh, 175075, India.
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10
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Ki Au Y, Ma Q, Zhang J, Xie Z. Ir-Catalyzed B(3)-Amination of o-Carboranes with Amines via Acceptorless Dehydrogenative BH/NH Cross-Coupling. Chem Asian J 2023; 18:e202300611. [PMID: 37694997 DOI: 10.1002/asia.202300611] [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: 07/14/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 09/12/2023]
Abstract
An efficient and convenient strategy for Ir-catalyzed selective B(3)-amination of o-carboranes with amines via acceptorless BH/NH dehydrocoupling was developed, affording a series of B(3)-aminated-o-carboranes in moderate to high isolated yields with H2 gas as a sole by-product. Such an oxidant-free system endues the protocol sustainability, atom-economy and environmental friendliness. A reaction mechanism via an Ir(I)-Ir(III)-Ir(I) catalytic cycle involving oxidative addition, dehydrogenation and reductive elimination was proposed.
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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
| | - Qiangqiang Ma
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong Shatin, N.T., Hong Kong, P.R. China
| | - Jie Zhang
- 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
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, P.R.China
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11
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Gruzdev DA, Telegina AA, Levit GL, Ezhikova MA, Kodess MI, Krasnov VP. Synthesis of Charge-Compensated nido-Carboranyl Derivatives of Sulfur-Containing Amino Acids and Biotin. J Org Chem 2023; 88:14022-14032. [PMID: 37737724 DOI: 10.1021/acs.joc.3c01569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
A new group of charge-compensated nido-carboranyl derivatives of sulfur-containing amino acids and biotin has been synthesized in which the boron atom in position 9 or 10 of carborane is attached to a positively charged sulfur atom. The possibilities of obtaining symmetrical B(10)-substituted and asymmetric B(9)-substituted nido-carboranes were studied. Using the example of (S)-methionine and D-biotin derivatives, water-soluble S-substituted charge-compensated nido-carboranes with free functional groups were prepared. The results obtained open up prospects for the development of potential boron delivery agents for BNCT as well as new bioactive compounds containing a negatively charged nido-carboranyl fragment bearing a positive charge on the sulfur atom associated with the boron cluster.
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Affiliation(s)
- Dmitry A Gruzdev
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
| | - Angelina A Telegina
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
| | - Galina L Levit
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
| | - Marina A Ezhikova
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
| | - Mikhail I Kodess
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
| | - Victor P Krasnov
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy St., Ekaterinburg 620108, Russia
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12
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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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13
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Noh HC, Kim CE, Lee K, Kim D, Lee PH. Iridium-Catalyzed Regioselective B(4)-Alkenylation and B(3,5)-Dialkenylation of o-Carboranes. Org Lett 2023; 25:6643-6648. [PMID: 37646852 DOI: 10.1021/acs.orglett.3c02410] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Iridium(I)-catalyzed regioselective B(4)-alkenylation has been developed from o-carboranyl sulfoxonium ylides and alkynes through B(4)-H activation. The sequential B(4)- and B(6)-alkenylation afforded B(3,5)-dialkenylated o-carboranyl sulfoxonium ylides in one pot. Eventually, two alkenyl groups, the same or different, were introduced at positions 3 and 5 of the carborane. Sulfoxonium ylide used as a directing group remains available for further functionalization and is converted to B-alkenylated o-carboranyl trichloromethyl ketones.
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Affiliation(s)
- Hee Chan Noh
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Cheol-Eui Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyungsup Lee
- 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
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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14
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Cui PF, Liu XR, Jin GX. Supramolecular Architectures Bearing Half-Sandwich Iridium- or Rhodium-Based Carboranes: Design, Synthesis, and Applications. J Am Chem Soc 2023; 145:19440-19457. [PMID: 37643971 DOI: 10.1021/jacs.3c05563] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
The utilization of carboranes in supramolecular chemistry has attracted considerable attention. The unique spatial configuration and weak interaction forces of carboranes can help to explore the properties of supramolecular complexes, particularly via host-guest chemistry. Additionally, certain difficulties encountered in carborane development─such as controlled B-H bond activation─can be overcome by judiciously selecting metal centers and their adjacent ligands. However, few studies are being conducted in this nascent research area. With advances in this field, novel carborane-based supramolecular complexes will likely be prepared, structurally characterized, and intrinsically investigated. To expedite these efforts, we present major findings from recent studies, including π-π interactions, host-guest associations, and steric effects, which have been leveraged to implement a regioselective process for activating B(2,9)-, B(2,8)-, and B(2,7)-H bonds of para-carboranes and B(4,7)-H bonds of ortho-carboranes. Future studies should clarify the unique weak interactions of carboranes and their potential for enhancing the utility of supramolecular complexes. Although carboranes exhibit several unique weak interactions (such as dihydrogen-bond [Bδ+-Hδ-···Hδ+-Cδ-], Bδ+-Hδ-···M+, and Bδ+-Hδ-···π interactions), the manner in which they can be utilized remains unclear. Supramolecular complexes, particularly those based on host-guest chemistry, can be utilized as a platform for demonstrating potential applications of these weak interactions. Owing to the importance of alkane separation, applications related to the recognition and separation of alkane isomers via dihydrogen-bond interactions are primarily summarized. Advances in the research of unique weak interactions in carboranes will certainly lead to more possibilities for supramolecular chemistry.
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Affiliation(s)
- Peng-Fei Cui
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200433, People's Republic of China
| | - Xin-Ran Liu
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200433, People's Republic of China
| | - Guo-Xin Jin
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200433, People's Republic of China
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15
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Park K, Han GU, Yoon S, Lee E, Noh HC, Lee K, Maeng C, Kim D, Lee PH. Iridium(III)-Catalyzed Regioselective B(4)-H Amination of o-Carboranes with Sufilimines. Org Lett 2023; 25:5989-5994. [PMID: 37540091 DOI: 10.1021/acs.orglett.3c02114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Iridium(III)-catalyzed regioselective B(4)-H amination is developed from the reaction of o-carborane acids with sulfilimines without any oxidants under mild conditions, which leads to a wide range of B(4)-H aminated o-carboranes in good yields with a broad substrate scope. Moreover, the selective B(3,6)-diamination reaction of the o-carborane acid was achieved. The present reaction is attractive from a practical point of view because dibenzothiophene is quantitatively recovered and reused.
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Affiliation(s)
- Kyeongna Park
- 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
| | - Sugyeong Yoon
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Eunseo Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hee Chan Noh
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyungsup Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- 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
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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16
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Nussbaum BC, Humphries AL, Gange GB, Peryshkov DV. Redox-active carborane clusters in bond activation chemistry and ligand design. Chem Commun (Camb) 2023; 59:9918-9928. [PMID: 37522167 DOI: 10.1039/d3cc03011c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
Icosahedral closo-dodecaboranes have the ability to accept two electrons, opening into a dianionic nido-cluster. This transformation can be utilized to store electrons, drive bond activation, or alter coordination to metal cations. In this feature article, we present cases for each of these applications, wherein the redox activity of carborane facilitates the generation of unique products. We highlight the effects of exohedral substituents on reactivity and the stability of the products through conjugation between the cluster and exohedral substituents. Futher, the utilization of the redox properties and geometry of carborane clusters in the ligand design is detailed, both in the stabilization of low-valent complexes and in the tuning of ligand geometry.
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Affiliation(s)
- Bryce C Nussbaum
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Amanda L Humphries
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Gayathri B Gange
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
| | - Dmitry V Peryshkov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St, Columbia, South Carolina 29208, USA.
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17
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Lin C, Jin Y, Sun J, Ye Z, Chen T, Liu J, Duttwyler S. Regioselective B2-6 penta-iodination of the [CB 11H 12] - monocarborane cluster by palladium catalysis. Dalton Trans 2023; 52:11042-11046. [PMID: 37540047 DOI: 10.1039/d3dt02275g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Penta-iodination of the B2-6 positions of the {CB11} monocarborane cluster is reported. Products of the structure [2,3,4,5,6-I5-CB11H6-12-X]- (X = H, Me, Et, Ph, Br, I) were obtained and fully characterized. X-ray crystal structures of three new compounds confirm this particular substitution pattern. The synthetic method relies on palladium catalysis/B-H activation, assisted by the C1-COOH directing group. The one-pot procedure enables penta-iodination and subsequent decarboxylation under convenient conditions. The B2-6 regioselectivity is complementary to the commonly observed reactivity of {CB11} clusters, which follows the trend B12 > B7-11 > B2-6 for electrophilic substitution. Thus, for the first time upper-belt halogenation is achieved without prior modification of the lower-belt positions.
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Affiliation(s)
- Chuhao Lin
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Yujie Jin
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Jizeng Sun
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Zehua Ye
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Tao Chen
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, China.
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18
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Yu JW, Zhang CY, Chass GA, Zhang JX, Mu WH, Cao K. Pd-NHC catalysed regioselective activation of B(3,6)-H of o-carborane - a synergy between experiment and theory. Dalton Trans 2023; 52:10609-10620. [PMID: 37462420 DOI: 10.1039/d3dt01432k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Regioselective B-H activation of o-carboranes is an effective way for constructing o-carborane derivatives, which have broad applications in medicine, catalysis and the wider chemical industry. However, the mechanistic basis for the observed selectivities remains unresolved. Herein, a series of density functional theory (DFT) calculations were employed to characterise the palladium N-heterocyclic carbene (Pd-NHC) catalysed regioselective B(3,6)-diarylation of o-carboranes. Computational results at the IDSCRF(ether)-LC-ωPBE/BS1 and IDSCRF(ether)-LC-ωPBE/BS2 levels showed that the reaction undergoes a Pd(0) → Pd(II) → Pd(0) oxidation/reduction cycle, with the regioselective B(3)-H activation being the rate-determining step (RDS) for the full reaction profile. The computed RDS free energy barrier of 24.3 kcal mol-1 agrees well with the 82% yield of B(3,6)-diphenyl-o-carborane in ether solution at 298 K after 24 hours of reaction. The Ag2CO3 additive was shown to play a crucial role in lowering the RDS free energy barrier and facilitating the reaction. Natural charge population (NPA) and molecular surface electrostatic potential (ESP) analyses successfully predicted the experimentally observed regioselectivities, with electronic effects being revealed to be the dominant contributors to product selectivity. Steric hindrance was also shown to impact the reaction rate, as revealed by experimental and computational characterisation studies of substituents and ligand effects. Furthermore, computational predictions aligned with the experimental findings that NHC ligands outperform the phosphine ones for this particular reaction. Overall, the observed trends reported in this work are expected to assist in the rational optimisation of the efficiency and regioselectivity of this and related reactions.
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Affiliation(s)
- Jia-Wei Yu
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650092, China.
| | - Cai-Yan Zhang
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, China.
| | - Gregory A Chass
- School of Physical and Chemical Sciences, Queen Mary, University of London, London, E1 4NS, UK
- Department of Chemistry and Biological Chemistry, McMaster University, Hamilton, L8S 4L8, Canada
- Faculty of Land and Food Systems, The University of British Columbia, Vancouver V6T 1Z4, Canada
| | - Jing-Xuan Zhang
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650092, China.
| | - Wei-Hua Mu
- Faculty of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650092, China.
| | - Ke Cao
- State Key Laboratory of Environment-friendly Energy Materials & School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, China.
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19
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Abstract
Metallacarboranes have attracted significant attention due to their unique properties. Considerable efforts have been made on the reactions around the metal centers or the metal ion itself, while transformations of functional groups of the metallacarboranes have been much less explored. We presented here the formation of imidazolium-functionalized nickelacarboranes (2), their subsequent conversion to nickelacarborane-supported N-heterocyclic carbenoids (NHCs, 3), and the reactivities of 3 toward Au(PPh3)Cl and Se powder, which resulted in the formation of bis-gold carbene complexes (4) and NHC selenium adducts (5). Cyclic voltammetry of 4 shows two reversible peaks, corresponding to the interconversion transformations NiII ↔ NiIII and NiIII ↔ NiIV. Theoretical calculations demonstrated relatively high-lying lone-pair orbitals, weak B-H···H-C interactions between the BH units and the methyl group, and weak B-H···π interactions between the BH groups and the vacant p-orbital of the carbene.
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Affiliation(s)
- Runxia Nan
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
- Key Laboratory of Silicone Materials Technology of Zhejiang Province, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
| | - Yiwen Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
- Key Laboratory of Silicone Materials Technology of Zhejiang Province, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
| | - Zhouli Zhu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
- Key Laboratory of Silicone Materials Technology of Zhejiang Province, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
| | - Fan Qi
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
- Key Laboratory of Silicone Materials Technology of Zhejiang Province, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
| | - Xu-Qiong Xiao
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
- Key Laboratory of Silicone Materials Technology of Zhejiang Province, Hangzhou Normal University, No. 2318, Yuhangtang Road, Hangzhou 311121, Zhejiang China
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20
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Teixidor F, Núñez R, Viñas C. Towards the Application of Purely Inorganic Icosahedral Boron Clusters in Emerging Nanomedicine. Molecules 2023; 28:molecules28114449. [PMID: 37298925 DOI: 10.3390/molecules28114449] [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: 04/27/2023] [Revised: 05/21/2023] [Accepted: 05/24/2023] [Indexed: 06/12/2023] Open
Abstract
Traditionally, drugs were obtained by extraction from medicinal plants, but more recently also by organic synthesis. Today, medicinal chemistry continues to focus on organic compounds and the majority of commercially available drugs are organic molecules, which can incorporate nitrogen, oxygen, and halogens, as well as carbon and hydrogen. Aromatic organic compounds that play important roles in biochemistry find numerous applications ranging from drug delivery to nanotechnology or biomarkers. We achieved a major accomplishment by demonstrating experimentally/theoretically that boranes, carboranes, as well as metallabis(dicarbollides), exhibit global 3D aromaticity. Based on the stability-aromaticity relationship, as well as on the progress made in the synthesis of derivatized clusters, we have opened up new applications of boron icosahedral clusters as key components in the field of novel healthcare materials. In this brief review, we present the results obtained at the Laboratory of Inorganic Materials and Catalysis (LMI) of the Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) with icosahedral boron clusters. These 3D geometric shape clusters, the semi-metallic nature of boron and the presence of exo-cluster hydrogen atoms that can interact with biomolecules through non-covalent hydrogen and dihydrogen bonds, play a key role in endowing these compounds with unique properties in largely unexplored (bio)materials.
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Affiliation(s)
- Francesc Teixidor
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain
| | - Rosario Núñez
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, 08193 Bellaterra, Spain
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21
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Wang HL, Yu QX, Zhu ZH, Lu XL, Li YL, Liang FP, Zou HH. "One-Pot" In Situ Tandem Reaction─Dy(III) Coordination-Catalyzed Multicomponent Condensation of Salicylaldehyde Derivatives to Obtain Ketals. Inorg Chem 2023; 62:5863-5871. [PMID: 36976914 DOI: 10.1021/acs.inorgchem.3c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
It is difficult to subject simple reaction starting materials to a "one-pot" in situ tandem reaction without post-treatment under mild reaction conditions to obtain multimers with complex structural linkages. In organic synthesis, acetal reactions are often used to protect derivatives containing carbonyl functional groups. Therefore, acetal products tend to have very low stability, and performing multi-step condensation to obtain complex multimeric products is difficult. Herein, we achieved the first efficient multiple condensation of o-vanillin derivatives using Dy(OAc)3·6H2O undergoing a "one-pot" in situ tandem reaction under mild solvothermal conditions to obtain a series of dimers (I and II, clusters 1 and 2) and trimers (I and II, clusters 3 and 4). When methanol or ethanol is used as the solvent, the alcoholic solvent participates in acetal and dehydration reactions to obtain dimers (I and II). Surprisingly, when using acetonitrile as the reaction solvent, the o-vanillin derivatives undergo acetal and dehydration reactions to obtain trimers (I and II). In addition, clusters 1-4 all showed distinct single-molecule magnetic behaviors under zero-field conditions. To the best of our knowledge, this is the first time that multiple acetal reactions catalyzed by coordination-directed catalysis under "one-pot" conditions have been realized, opening a new horizon for the development of fast, facile, green, and efficient synthetic methods for complex compounds.
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Affiliation(s)
- Hai-Ling Wang
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Qiu-Xiang Yu
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Zhong-Hong Zhu
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Xing-Lin Lu
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Yun-Lan Li
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
| | - Fu-Pei Liang
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Hua-Hong Zou
- School of Chemistry and Pharmaceutical Sciences, State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Guangxi Normal University, Guilin 541004, P. R. China
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22
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Ma YN, Ren H, Wu Y, Li N, Chen F, Chen X. B(9)-OH- o-Carboranes: Synthesis, Mechanism, and Property Exploration. J Am Chem Soc 2023; 145:7331-7342. [PMID: 36962083 DOI: 10.1021/jacs.2c13570] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2023]
Abstract
Herein, we present a chemically robust and efficient synthesis route for B(9)-OH-o-carboranes by the oxidation of o-carboranes with commercially available 68% HNO3 under the assistance of trifluoromethanesulfonic acid (HOTf) and hexafluoroisopropanol (HFIP). The reaction is highly efficient with a wide scope of carboranes, and the selectivity of B(9)/B(8) is up to 98:2. The success of this transformation relies on the strong electrophilicity and oxidizability of HNO3, promoted through hydrogen bonds of the Brønsted acid HOTf and the solvent HFIP. Mechanism studies reveal that the oxidation of o-carborane involves an initial electrophilic attack of HNO3 to the hydrogen atom at the most electronegative B(9) of o-carborane. In this transformation, the hydrogen atom of the B-H bond is the nucleophilic site, which is different from the electrophilic substitution reaction, where the boron atom is the nucleophilic site. Therefore, this is an oxidation-reduction reaction of o-carborane under mild conditions in which N(V) → N(III) and H(-I) → H(I). The derivatization of 9-OH-o-carborane was further examined, and the carboranyl group was successfully introduced to an amino acid, polyethylene glycol, biotin, deoxyuridine, and saccharide. Undoubtedly, this approach provides a selective way for the rapid incorporation of carborane moieties into small molecules for application in boron neutron capture therapy, which requires the targeted delivery of boron-rich groups.
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Affiliation(s)
- Yan-Na Ma
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Huazhan Ren
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yanxuan Wu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Na Li
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
| | - Feijing Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xuenian Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
- School of Chemistry and Chemical Engineering, Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, Henan Normal University, Xinxiang, Henan 453007, China
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23
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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: 0] [Impact Index Per Article: 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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24
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Zhang CY, Cao K, Liu D, Yang HB, Teng CC, Li B, Yang J. Iridium-catalyzed selective amination of B(4)-H for the synthesis of o-carborane-fused indolines. Dalton Trans 2023; 52:2933-2936. [PMID: 36815456 DOI: 10.1039/d3dt00316g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
An iridium-catalyzed selective amination of B(4)-H via dehydrogenative cross-coupling of B-H/N-H bonds for the synthesis of o-carborane-fused indolines has been developed for the first time. Various types of unprecedented o-carborane-fused indolines have been synthesized, which would be potential candidates for applications in drug discovery, pharmaceutical chemistry and functional materials. This work offers a valuable reference for the designing and synthesis of o-carborane-fused heterocycles.
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Affiliation(s)
- Cai-Yan Zhang
- 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.
| | - 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.
| | - Dechun Liu
- 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.
| | - 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.
| | - 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.
| | - 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 Materials and Chemistry, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan, P. R. China.
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25
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Ochi J, Tanaka K, Chujo Y. Investigation of the Substitution Site Effect on o-Carborane-Based Chromophores by Anthracene Introduction at the B(3) Position. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2023. [DOI: 10.1246/bcsj.20220310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Junki Ochi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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26
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Yang Q, Dai Q, Bao X, Zhou Y, Lu Y, Zhong H, Wu L, Guo Y, Liu L, Tan X, Xia Y, Han M, Wei Q. Evaluation of a Tumor-Targeting Oligosaccharide Nanosystem in BNCT on an Orthotopic Hepatocellular Carcinoma Model. Mol Pharm 2023; 20:1025-1038. [PMID: 36571795 DOI: 10.1021/acs.molpharmaceut.2c00771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Boron neutron capture therapy (BNCT) is becoming a promising radiation treatment technique dealing with tumors due to its cellular targeting specificity. In this article, based on the biocompatible chitosan oligosaccharide (COS), we designed a boron delivery system using carborane (CB) as a boron drug with cRGD peptide modification and paclitaxel (PTX) loaded in the hydrophobic core. The nanoparticles (cRGD-COS-CB/PTX) realized the boron delivery into tumor sites with an enhanced permeability and retention (EPR) effect and an active targeting effect achieved by the cRGD-integrin interaction on the surface of tumor cells. The uniform spherical nanoparticles can be selectively taken by hepatoma cells rather than normal hepatocytes. In vivo experiments showed that the nanoparticles had a targeting effect on tumor sites in both subcutaneous and orthotopic tumor models, which was an encouraging result for radiotherapy for liver cancer. To sum up, the nanoparticles we produced proved to be promising dual-functionalized nanoparticles for radiotherapy and chemotherapy.
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Affiliation(s)
- Qiyao Yang
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China.,College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Qi Dai
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China
| | - Xiaoyan Bao
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Yi Zhou
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Yiying Lu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Haiqing Zhong
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Linjie Wu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Yinglu Guo
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China
| | - Lihong Liu
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China
| | - Xin Tan
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Yiyi Xia
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China
| | - Min Han
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China.,College of Pharmaceutical Sciences, Zhejiang University, Hangzhou310058, China.,Hangzhou Institute of Innovative Medicine, Zhejiang University, Hangzhou310058, China
| | - Qichun Wei
- Department of Radiation Oncology, Key Laboratory of Cancer Prevention and Intervention, The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou310058, China
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27
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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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28
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Lu W, Wu Y, Ma YN, Chen F, Chen X. A Method for Highly Selective Halogenation of o-Carboranes and m-Carboranes. Inorg Chem 2023; 62:885-892. [PMID: 36584667 DOI: 10.1021/acs.inorgchem.2c03694] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A facile halogenation method for highly selective synthesis of 9-X-o-carboranes, 9,12-X2-o-carboranes, 9-X-12-X'-o-carboranes, 9-X-m-carboranes, 9,10-X2-m-carboranes, and 9-X-10-X'-m-carboranes (X, X' = Cl, Br, I) has been developed on the basis of our previous work. The success of this transformation relies on the usage of trifluoromethanesulfonic acid (HOTf), the easily available strong Brønsted acid. The addition of HOTf greatly increases the electrophilicity of N-haloamides through hydrogen bonding interaction, resulting in the low loading of N-haloamides, short reaction time, and mild reaction conditions. Additionally, the solvent 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) is also essential to further increase the acidity of HOTf.
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Affiliation(s)
- Wen Lu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yanxuan Wu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yan-Na Ma
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Feijing Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xuenian Chen
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
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29
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Ochi J, Tanaka K, Chujo Y. Alternately π-Stacked Systems Assisted by o-Carborane: Dual Excimer Emission and Color Modulation by B cage -Methylation. Angew Chem Int Ed Engl 2023; 62:e202214397. [PMID: 36328979 DOI: 10.1002/anie.202214397] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Indexed: 11/06/2022]
Abstract
Herein, we report the unique solid-state excimer emission of three types of acridine-tethered o-carboranes with variable degrees of methylation at the o-carborane unit. They all showed columnar packing structures based on dimer formation, and two types of π-overlapping motifs were alternately stacked. From the photoluminescence (PL) measurements on the crystalline samples, it was found that three types of luminescence bands can simultaneously appear: monomer emission, excimer emission from the moderately π-stacked intra-dimer unit, and excimer emission from the widely π-stacked inter-dimer unit. Consequently, the PL colors were drastically changed by the steric effect of the methyl groups, with a strong correlation found between the π-overlapping and excimer character. In addition, variable-temperature PL measurements revealed that these PL species should be in thermal equilibrium at room temperature, with the intensity ratios sensitive toward temperature changes.
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Affiliation(s)
- Junki Ochi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
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30
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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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31
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Li YL, Lu XL, Zhu ZH, Wang HL, Liang FP, Zou HH. Manipulating Solvothermal Coordination-Catalyzed In Situ Tandem Reactions to Construct Dysprosium-Based Complexes with Different Shapes and Zero-Field SMM Behaviors. Inorg Chem 2022; 61:20513-20523. [DOI: 10.1021/acs.inorgchem.2c03238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yun-Lan Li
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Xing-Lin Lu
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Zhong-Hong Zhu
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Hai-Ling Wang
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
| | - Fu-Pei Liang
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, P. R. China
| | - Hua-Hong Zou
- School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, P. R. China
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32
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Guo ST, Cui PF, Liu XR, Jin GX. Synthesis of Carborane-Backbone Metallacycles for Highly Selective Capture of n-Pentane. J Am Chem Soc 2022; 144:22221-22228. [PMID: 36442076 DOI: 10.1021/jacs.2c10201] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The specific recognition and separation of alkanes with similar molecular structures and close boiling points face significant scientific challenges and industrial demands. Here, rectangular carborane-based metallacycles were designed to selectively encapsulate n-pentane from n-pentane, iso-pentane, and cyclo-pentane mixtures in a simple-to-operate and more energy-efficient way. Metallacycle 1, bearing 1,2-di(4-pyridyl) ethylene, can selectively separate n-pentane from these three-component mixtures with a purity of 97%. The selectivity is ascribed to the capture of the preferred guest with matching size, C-H···π interactions, and potential B-Hδ-···Hδ+-C interactions. Besides, the removal of n-pentane gives rise to original guest-free carborane-based metallacycles, which can be recycled without losing performance. Considering the variety of substituted carborane derivatives, metal ions, and organic linkers, these new carborane-based supramolecular coordination complexes (SCCs) may be broadly applicable to other challenging recognition and separation systems with good performance.
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Affiliation(s)
- Shu-Ting Guo
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200433, P. R. China
| | - Peng-Fei Cui
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200433, P. R. China
| | - Xin-Ran Liu
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200433, P. R. China
| | - Guo-Xin Jin
- State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai 200433, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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33
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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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34
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Li S, Zhang J, Xie Z. Visible-Light-Induced Palladium-Catalyzed Cross-Coupling of Iodocarboranes with (Hetero)Arenes. Org Lett 2022; 24:7497-7501. [PMID: 36201284 DOI: 10.1021/acs.orglett.2c02648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work describes a general method for the efficient production of a class of cage B-centered carboranyl radicals at the B3, B4, and B9 sites via a visible-light-promoted palladium(0)/palladium(I) pathway using readily available iodo-o-carboranes as the starting materials. The electrophilicities of these hypervalent boron-centered radicals decrease in the following order: B3 > B4 > B9. They are useful intermediates for the preparation of a family of cage B-(hetero)arylated o-carboranes at ambient temperature.
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Affiliation(s)
- Shimeng Li
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - 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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35
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Hamdaoui M, Liu F, Cornaton Y, Lu X, Shi X, Zhang H, Liu J, Spingler B, Djukic JP, Duttwyler S. An Iridium-Stabilized Borenium Intermediate. J Am Chem Soc 2022; 144:18359-18374. [PMID: 36173688 DOI: 10.1021/jacs.2c06298] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Exploration of new organometallic systems based on polyhedral boron clusters has the potential to solve challenging chemical problems such as the stabilization of reactive intermediates and transition-state-like species postulated for E-H (E = H, B, C, Si) bond activation reactions. We report on facile and clean B-H activation of a hydroborane by a new iridium boron cluster complex. The product of this reaction is an unprecedented and fully characterized transition metal-stabilized boron cation or borenium. Moreover, this intermediate bears an unusual intramolecular B···H interaction between the hydrogen originating from the activated hydroborane and the cyclometallated metal-bonded boron atom of the boron cluster. This B···H interaction is proposed to be an arrested insertion of hydrogen into the Bcage-metal bond and the initiation step for iridium "cage-walking" around the upper surface of the boron cluster. The "cage-walking" process is supported by the hydrogen-deuterium exchange observed at the boron cluster, and a mechanism is proposed on the basis of theoretical methods with a special focus on the role of noncovalent interactions. All new compounds were isolated and fully characterized by NMR spectroscopy and elemental analysis. Key compounds were studied by single crystal X-ray diffraction and X-ray photoelectron spectroscopy.
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Affiliation(s)
- Mustapha Hamdaoui
- Department of Chemistry, Zheijang University, Hangzhou 310027, China
| | - Fan Liu
- Department of Chemistry, Zheijang University, Hangzhou 310027, China
| | - Yann Cornaton
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg UMR 7177 CNRS, Université de Strasbourg, Strasbourg 67000, France
| | - Xingyu Lu
- Instrumentation Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, China
| | - Xiaohuo Shi
- Instrumentation Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, China
| | - Huan Zhang
- Instrumentation Service Center for Molecular Sciences, Westlake University, Hangzhou 310024, China
| | - Jiyong Liu
- Department of Chemistry, Zheijang University, Hangzhou 310027, China
| | - Bernhard Spingler
- Department of Chemistry, University of Zurich, Zurich 8057, Switzerland
| | - Jean-Pierre Djukic
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg UMR 7177 CNRS, Université de Strasbourg, Strasbourg 67000, France
| | - Simon Duttwyler
- Department of Chemistry, Zheijang University, Hangzhou 310027, China
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36
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Zhang LB, Xie Z. Iridium-Catalyzed Selective B(4)-H Amination of o-Carboranes with Anthranils. Org Lett 2022; 24:7077-7081. [PMID: 36148973 DOI: 10.1021/acs.orglett.2c02590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report here a catalytic selective cage B4-H amination of o-carboranes employing an Ir(III) complex as a catalyst and anthranils as aminating agents, leading to a large class of B4-aminated o-carboranes with very high yields and a broad substrate scope under mild conditions without any oxidants. In these reactions, the carboxyl group serves as a traceless directing unit to determine the site selectivity and degree of substitution.
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Affiliation(s)
- Lin-Bao Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.,State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, 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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37
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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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38
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Hu J, Dong W, Wang J. Synthesis, structure, and mechanism of the isomers of ruthenium complexes based on HC≡CC(OH)(CH3)2 and ortho-Carborane dithiolate ligands. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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39
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Luo D, Fu Y, Lu JY. Pd-Catalyzed Oxidative Dehydrogenative Cross Coupling of Cage B-H/B-H Bonds at Room Temperature: Synthesis of Bis( o-carborane)s. Inorg Chem 2022; 61:13756-13767. [PMID: 36005736 DOI: 10.1021/acs.inorgchem.2c01360] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Efficient Pd-catalyzed oxidative dehydrogenative cross coupling of B-H/B-H bonds of two pyridyl o-carboranes has been developed, leading to the preparation of B(3)-B(6') heterocoupled and B(3)-B(6') homocoupled biscarboranes with a broad substrate scope at room temperature.
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Affiliation(s)
- Donghong Luo
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Yatong Fu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Ju-You Lu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, China
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40
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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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41
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Zhang CY, Cao K, Yang HB, Ding LF, Yang J. Cu(OTf) 2/NBS-Mediated Tandem Reaction of 1-Cinnamyl Alcohol- o-Carboranes via Ring Opening of Oxetane with Arenes: An Alternative Approach for the Synthesis of C-Alkenyl- o-Carboranes. J Org Chem 2022; 87:10928-10936. [PMID: 35921205 DOI: 10.1021/acs.joc.2c01217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Cu(OTf)2/NBS-mediated tandem reaction of 1-cinnamyl alcohol-o-carboranes for the synthesis of C-alkenyl-o-carboranes has been developed. Mechanism studies demonstrated that the Cu(OTf)2-promoted ring opening of oxetane with electron-rich arenes as soft nucleophiles was involved and was the key step for the transformation. This work provided an alternative strategy for the synthesis of C-alkenyl-o-carboranes, which has an important reference for the synthesis of o-carborane derivatives with diversity.
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Affiliation(s)
- Cai-Yan Zhang
- State Key Laboratory of Environment-Friendly Energy Materials and 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 and School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Han-Bo Yang
- State Key Laboratory of Environment-Friendly Energy Materials and School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Li-Fang Ding
- State Key Laboratory of Environment-Friendly Energy Materials and School of Material Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, Sichuan 621010, P. R. China
| | - Junxiao Yang
- State Key Laboratory of Environment-Friendly Energy Materials and 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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42
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Lyu H, Xie Z. Transition metal catalyzed selective B(3)-H or B(4)-H amination of o-carboranes via dehydrogenative BH/NH cross-coupling. Chem Commun (Camb) 2022; 58:8392-8395. [PMID: 35792563 DOI: 10.1039/d2cc02852b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A unique approach to vertex-selective catalytic B-H amination at either the B(3)- or B(4)-position in o-carboranes has been developed. Using different transition metal catalysts, dehydrogenative BH/NH cross-coupling of o-carboranes and free amines has been achieved, leading to a wide variety of cage B(3)- or B(4)-aminated o-carboranes in moderate to high yields with excellent regioselectivity, where carboranyl carboxylic acids and amines can serve as competent coupling partners without any pre-functionalization. The isolation and structural identification of a key intermediate provide an insight into the reaction mechanism in the catalytic B(4)-H amination.
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Affiliation(s)
- Hairong Lyu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, China.
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, NT, China.
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43
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Cao K, Zhang CY. Advances in Synthesis of Biscarboranes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200737] [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)
- Ke Cao
- Southwest University of Science and Technology State Key Laboratory of Environment-friendly Energy Materials Qinglong road 59 621010 Mianyang CHINA
| | - Cai-Yan Zhang
- Southwest University of Science and Technology State Key Laboratory of Environment-friendly Energy Materials CHINA
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44
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Zhou P, Chen Y, Xie Z. Iron-Catalyzed Selective B–H Activation for 4/5-fold Methylation and Arylation of Carboranes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02120] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Peng Zhou
- 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
| | - 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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45
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Tang W, He Y, Li H. Migration Mechanism of the B–H Activation of Carboranes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wanyong Tang
- North Minzu University College of Chemistry and Chemical Engineering CHINA
| | - Yuhan He
- North Minzu University College of Chemistry and Chemical Engineering CHINA
| | - Hui Li
- North Minzu University Chemical science and engineering college No.204, North Wenchang Street, Xixia District, Yinchuan City, Ningxia, China 750021 Yinchuan CHINA
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46
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Jei BB, Yang L, Ackermann L. Selective Labeling of Peptides with o-Carboranes via Manganese(I)-Catalyzed C-H Activation. Chemistry 2022; 28:e202200811. [PMID: 35420234 PMCID: PMC9320968 DOI: 10.1002/chem.202200811] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Indexed: 12/15/2022]
Abstract
A robust method for the selective labeling of peptides via manganese(I) catalysis was devised to achieve the C-2 alkenylation of tryptophan containing peptides with 1-ethynyl-o-carboranes. The manganese-catalyzed C-H activation was accomplished with high catalytic efficiency, and featured low toxicity, high functional group tolerance and excellent E-stereoselectivity. This approach unravels a promising tool for the assembly of o-carborane with structurally complex peptides of relevance to applications in boron neutron capture therapy.
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Affiliation(s)
- Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tamannstraße 2, 37077, Göttingen, Germany.,Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Long Yang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tamannstraße 2, 37077, Göttingen, Germany.,Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tamannstraße 2, 37077, Göttingen, Germany.,Woehler Research Institute for Sustainable Chemistry (WISCh), Georg-August-Universität Göttingen, Tammannstraße 2, 37077, Göttingen, Germany
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47
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Sun C, Lu JY, Lu J. Pd-Catalyzed Selective B(6)-H Phosphorization of nido-Carboranes via Cascade Deboronation/B-H Activation from closo-Carboranes. Inorg Chem 2022; 61:9623-9630. [PMID: 35700190 DOI: 10.1021/acs.inorgchem.2c00993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Efficient Pd-catalyzed regioselective B(6)-H phosphorization of nido-carboranes via cascade deboronation/B-H activation of readily available C-substituted o-carboranes with various phosphines using 3-methylpyridine or isoquinoline as a directing group in combination with pyridine ligands has been developed, affording unprecedented B(6)-phosphinated nido-carborane derivatives with high selectivity in a simple one-pot process.
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Affiliation(s)
- Chaofan Sun
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Ju-You Lu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, School of Science, Hainan University, 58 Renmin Road, Haikou 570228, China
| | - Jian Lu
- State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi'an Modern Chemistry Research Institute, Xi'an 710065, China
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48
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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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49
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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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50
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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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