1
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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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2
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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: 9] [Impact Index Per Article: 9.0] [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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3
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Wang L, Yan X, Tian G, Xie Z, Shi S, Zhang Y, Li S, Sun X, Sun J, He J, Shen H. Chiral copper-hydride nanoclusters: synthesis, structure, and assembly. Dalton Trans 2023; 52:3371-3377. [PMID: 36810425 DOI: 10.1039/d2dt03788b] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An effective strategy is developed to synthesize a novel and stable layered Cu nanocluster using a one-pot reduction method. The cluster, with a molecular formula of [Cu14(tBuS)3(PPh3)7H10]BF4 which has been unambiguously characterized by single crystal X-ray diffraction analysis, exhibits different structures from previously reported analogues with core-shell geometries. In the absence of chiral ligands, the cluster displays intrinsic chirality owing to the non-covalent ligand-ligand interactions (e.g., C-H⋯Cu interactions and C-H⋯π interactions) to lock the central copper core. The interlacing of chiral-cluster enantiomers forms a large cavity, which lays the foundation for a series of potential applications such as drug filling and gas adsorption. Moreover, the C-H⋯H-C interactions of phenyl groups between different cluster moieties promote the formation of a dextral helix and realization of the self-assembly of nanostructures.
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Affiliation(s)
- Lin Wang
- College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China. .,College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Xiaodan Yan
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Guolong Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhenlang Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Shanshan Shi
- Department of Chemistry and Chemical Engineering, Hefei Normal University, 230061, Hefei, Anhui, China.
| | - Yuhao Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Simin Li
- College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China.
| | - Xueli Sun
- College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China.
| | - Jing Sun
- College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China.
| | - Jinlu He
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
| | - Hui Shen
- College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China.
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4
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How the Position of Substitution Affects Intermolecular Bonding in Halogen Derivatives of Carboranes: Crystal Structures of 1,2,3- and 8,9,12-Triiodo- and 8,9,12-Tribromo ortho-Carboranes. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020875. [PMID: 36677932 PMCID: PMC9865681 DOI: 10.3390/molecules28020875] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023]
Abstract
The crystal structures of two isomeric triiodo derivatives of ortho-carborane containing substituents in the three most electron-withdrawing positions of the carborane cage, 1,2,3-I3-1,2-C2B10H9, and the three most electron-donating positions, 8,9,12-I3-1,2-C2B10H9, as well as the crystal structure of 8,9,12-Br3-1,2-C2B10H9, were determined by single-crystal X-ray diffraction. In the structure of 1,2,3-I3-1,2-C2B10H9, an iodine atom attached to the boron atom (position 3) donates its lone pairs simultaneously to the σ-holes of both iodine atoms attached to the carbon atoms (positions 1 and 2) with the I⋯I distance of 3.554(2) Å and the C-I⋯I and B-I⋯I angles of 169.2(2)° and 92.2(2)°, respectively. The structure is additionally stabilized by a few B-H⋯I-shortened contacts. In the structure of 8,9,12-I3-1,2-C2B10H9, the I⋯I contacts of type II are very weak (the I⋯I distance is 4.268(4) Å, the B8-I8⋯I12 and B12-I12⋯I8 angles are 130.2(3)° and 92.2(3)°) and can only be regarded as dihalogen bonds formally. In comparison with the latter, the structure of 8,9,12-Br3-1,2-C2B10H9 demonstrates both similarities and differences. No Br⋯Br contacts of type II are observed, while there are two Br⋯Br halogen bonds of type I.
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5
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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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6
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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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7
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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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8
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Gruzdev DA, Telegina AA, Levit GL, Krasnov VP. N-Aminoacyl-3-amino- nido-carboranes as a Group of Boron-Containing Derivatives of Natural Amino Acids. J Org Chem 2022; 87:5437-5441. [PMID: 35377641 DOI: 10.1021/acs.joc.2c00151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A new group of nido-carboranyl derivatives of natural (S)-amino acids containing from 9 to 18 boron atoms was obtained in good yields as a result of acylation of 3-amino-1,2-dicarba-closo-dodecaborane followed by deboronation. The proposed approach is convenient and based on the use of readily available reagents and is suitable for the synthesis of enantiopure nido-carboranyl derivatives of amino acids with various side chains, including water-soluble boron-containing amino acids (17 examples).
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Affiliation(s)
- Dmitry A Gruzdev
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy Street, Ekaterinburg 620108, Russia
| | - Angelina A Telegina
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy Street, Ekaterinburg 620108, Russia
| | - Galina L Levit
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy Street, Ekaterinburg 620108, Russia
| | - Victor P Krasnov
- Postovsky Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, 22/20, S. Kovalevskoy Street, Ekaterinburg 620108, Russia
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9
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Vinogradov MM, Nelyubina YV, Aliyeu TM. New aspects of acid-assisted nucleophilic substitution reactions of 11-vertex nido-carboranes. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Transition metal catalyzed synthesis of derivatives of polyhedral boron hydrides with B N, B P, B O and B S bonds. ADVANCES IN CATALYSIS 2022. [DOI: 10.1016/bs.acat.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Recent trends and tactics in facile functionalization of neutral icosahedral carboranes (C2B10H12) and nido-carborane (7,8-C2B9H12−). ADVANCES IN CATALYSIS 2022. [DOI: 10.1016/bs.acat.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Synthesis of 3-Aryl- ortho-carboranes with Sensitive Functional Groups. Molecules 2021; 26:molecules26237297. [PMID: 34885881 PMCID: PMC8659134 DOI: 10.3390/molecules26237297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 11/26/2021] [Accepted: 11/29/2021] [Indexed: 11/16/2022] Open
Abstract
A simple and efficient method was developed for the one-pot synthesis of 3-aryl derivatives of ortho-carborane with sensitive functional groups using 3-iodo-ortho-carborane and aryl zinc bromides that were generated in situ. A series of 3-aryl-ortho-carboranes, including those containing nitrile and ester groups, 3-RC6H4-1,2-C2B10H11 (R = p-Me, p-NMe2, p-OCH2OMe, p-OMe, o-CN, p-CN, o-COOEt, m-COOEt, p-COOEt) was synthesized using this approach. The solid-state structures of 3-RC6H4-1,2-C2B10H11 (R = p-OMe, o-CN, and p-CN) were determined by single crystal X-ray diffraction. The intramolecular hydrogen bonding involving the ortho-substituents of the aryl ring and the CH and BH groups of carborane was discussed.
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13
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Ham H, Shin S, Ko GH, Han SH, Han GU, Maeng C, Kim TH, Noh HC, Lee K, Kim H, Yang H, Lee PH. Direct and Regioselective Palladium(II)-Catalyzed B(4)-H Monoacyloxylation and B(4,5)-H Diacetoxylation of o-Carborane Acids with Phenyliodonium Dicarboxylates. J Org Chem 2021; 86:15153-15163. [PMID: 34592103 DOI: 10.1021/acs.joc.1c01804] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A direct B(4)-H monoacyloxylation via a Pd-catalyzed regioselective B(4)-H activation of o-carborane acids with phenyliodonium dicarboxylates was developed, and a series of B(4)-H monoacyloxylated o-carboranes decorated with active groups were synthesized with moderate to good yields as well as excellent selectivity. In addition, a direct B(4,5)-H diacetoxylation from o-carborane acids with phenyliodonium diacetate was demonstrated.
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Affiliation(s)
- Hyeongcheol Ham
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seohyun Shin
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Gi Hoon Ko
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sang Hoon Han
- 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
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Tae Hyeon Kim
- 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
| | - Hanjoong Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Heejin Yang
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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14
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Au YK, Zhang J, Quan Y, Xie Z. Ir-Catalyzed Selective B(3)-H Amination of o-Carboranes with NH3. J Am Chem Soc 2021; 143:4148-4153. [DOI: 10.1021/jacs.1c00593] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yik Ki Au
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| | - Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, China
| | - Yangjian Quan
- 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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15
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Guo ST, Cui PF, Yuan RZ, Jin GX. Transition metal-mediated B(4)-H hydroxylation/halogenation of o-carboranes bearing a 2-pyridylsulfenyl ligand. Chem Commun (Camb) 2021; 57:2412-2415. [PMID: 33554232 DOI: 10.1039/d0cc08290b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The introduction of the 2-pyridylsulfenyl directing group to o-carboranes allowed either B(3)-Ir or B(4)-Ir bond formation using a steric effect strategy. Moreover, the reactivity of the B(4)-Rh o-carborane complexes with small molecules was probed by reactions with N-bromosuccinimide, N-iodosuccinimide and O2. Rhodium-mediated B(4)-hydroxylation and B(4)-halogenation which are seldom reported have been achieved under practical and mild conditions.
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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, Shanghai 200433, P. R. China.
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16
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Mu X, Hopp M, Dziedzic RM, Waddington MA, Rheingold AL, Sletten EM, Axtell JC, Spokoyny AM. Expanding the Scope of Palladium-Catalyzed B - N Cross-Coupling Chemistry in Carboranes. Organometallics 2020; 39:4380-4386. [PMID: 34012188 DOI: 10.1021/acs.organomet.0c00576] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Over the past several years, a number of strategies for the functionalization of dicarba-closo-dodecaboranes (carboranes) have emerged. Despite these developments, B - N bond formation on the carborane scaffold remains a challenge due to the propensity of strong nucleophiles to partially deboronate the parent closo-carborane cluster into the corresponding nido form. Here we show that azide, sulfonamide, cyanate, and phosphoramidate nucleophiles can be straightforwardly cross-coupled onto the B(9) vertices of the o- and m-carborane core from readily accessible precursors without significant deboronation by-products, laying the groundwork for further study into the utility and properties of these new B-aminated carborane species. We further showcase select reactivity of the installed functional groups highlighting some unique features stemming from the combination of the electron-donating B(9) position and the large steric profile of the B-connected carborane substituent.
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Affiliation(s)
- Xin Mu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Morgan Hopp
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Rafal M Dziedzic
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Mary A Waddington
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Ellen M Sletten
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
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17
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Liang YF, Yang L, Jei BB, Kuniyil R, Ackermann L. Regioselective B(3,4)-H arylation of o-carboranes by weak amide coordination at room temperature. Chem Sci 2020; 11:10764-10769. [PMID: 34094330 PMCID: PMC8162305 DOI: 10.1039/d0sc01515f] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/03/2020] [Indexed: 01/17/2023] Open
Abstract
Palladium-catalyzed regioselective di- or mono-arylation of o-carboranes was achieved using weakly coordinating amides at room temperature. Therefore, a series of B(3,4)-diarylated and B(3)-monoarylated o-carboranes anchored with valuable functional groups were accessed for the first time. This strategy provided an efficient approach for the selective activation of B(3,4)-H bonds for regioselective functionalizations of o-carboranes.
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Affiliation(s)
- Yu-Feng Liang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Long Yang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Becky Bongsuiru Jei
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstraße 2 37077 Gottingen Germany
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18
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Mills HA, Martin JL, Rheingold AL, Spokoyny AM. Oxidative Generation of Boron-Centered Radicals in Carboranes. J Am Chem Soc 2020; 142:4586-4591. [PMID: 32073842 PMCID: PMC7276281 DOI: 10.1021/jacs.0c00300] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the first indirect observation and use of boron vertex-centered carboranyl radicals generated by the oxidation of modified carboranyl precursors. These radical intermediates are formed by the direct oxidation of a B-B bond between a boron cluster cage and an exopolyhedral boron-based substituent (e.g., -BF3K, -B(OH)2). The in situ generated radical species are shown to be competent substrates in reactions with oxygen-based radicals, dichalcogenides, and N-heterocycles, yielding the corresponding substituted carboranes containing B-O, B-S, B-Se, B-Te, and B-C bonds. Remarkably, this chemistry tolerates various electronic environments, providing access to facile substitution chemistry at both electron-rich and electron-poor B-H vertices in carboranes.
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Affiliation(s)
- Harrison A. Mills
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Joshua L. Martin
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Alexander M. Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
- California NanoSystems Institute (CNSI), University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, California 90095, United States
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19
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Shmalko AV, Anufriev SA, Stogniy MY, Suponitsky KY, Sivaev IB. Synthesis and structure of 3-arylazo derivatives of ortho-carborane. NEW J CHEM 2020. [DOI: 10.1039/d0nj02052d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A series of B-substituted arylazo derivatives of ortho-carborane 3-XC6H4-NN-1,2-C2B10H11 (X = p-NMe2, p-OMe, o-Me) were synthesized by reaction of its diazonium derivative [3-N2-o-C2B10H11][BF4] with the corresponding Grignard reagents.
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Affiliation(s)
- Akim V. Shmalko
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Sergei A. Anufriev
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Marina Yu. Stogniy
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Kyrill Yu. Suponitsky
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- N. S. Kurnakov Institute of General and Inorganic Chemistry
| | - Igor B. Sivaev
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
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20
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Andreichuk EP, Anisimov AA, Shmalko AV, Suponitsky KY, Sivaev IB, Bregadze VI. Stability of nickel bis(dicarbollide) complexes. MENDELEEV COMMUNICATIONS 2019. [DOI: 10.1016/j.mencom.2019.09.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Wu J, Cao K, Zhang CY, Xu TT, Ding LF, Li B, Yang J. Catalytic Oxidative Dehydrogenative Coupling of Cage B–H/B–H Bonds for Synthesis of Bis(o-carborane)s. Org Lett 2019; 21:5986-5989. [DOI: 10.1021/acs.orglett.9b02129] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ji Wu
- 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
| | - 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
| | - Tao-Tao Xu
- 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
| | - 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 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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22
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Shmal’ko AV, Anufriev SA, Anisimov AA, Stogniy MY, Sivaev IB, Bregadze VI. Synthesis of cobalt and nickel 6,6′-diphenylbis(dicarbollides). Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2547-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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Rodríguez-Rey JL, Esteban-Gómez D, Platas-Iglesias C, Sousa-Pedrares A. Electronic versus steric control in palladium complexes of carboranyl phosphine-iminophosphorane ligands. Dalton Trans 2019; 48:486-503. [PMID: 30520489 DOI: 10.1039/c8dt04006k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of carboranyl phosphine-iminophosphorane ligands was prepared and characterized. The new ligands present a carboranyl group directly attached to the iminophosphorane nitrogen atom through a cage carbon atom (C-carboranyl derivatives L1-L3) or through the B3 boron atom (B-carboranyl derivatives L4 and L5), and the phosphine group on a side chain derived from the diphosphine dppm, i.e. with a two-atom spacer between the P and N donor atoms. The non-carboranyl analogue L6, with a biphenyl group on the nitrogen atom, was also synthesized for comparison. These potential (P, N) ligands were used to obtain palladium complexes (Pd1-Pd6) and, thus, study how the different inductive effect of the carboranyl substituents can modify the coordinating ability of the nitrogen atom. The structural analysis of the complexes revealed two different coordination modes for the ligands: the (P, N) chelate coordination and the unexpected P-terminal coordination, which is not observed for non-carboranyl phosphine-iminophosphoranes. These unexpected structural differences led us to perform DFT calculations on the ligands and metal complexes. The calculations show that the final coordination modes depend on the balance between the electronic and steric properties of the particular carboranyl group.
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Affiliation(s)
- José Luis Rodríguez-Rey
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
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24
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Ishita K, Khalil A, Tiwari R, Gallucci J, Tjarks W. Bis(tri‐
tert
‐butylphosphine)palladium(0)‐Catalyzed Iodine–Fluorine Exchange at
closo
‐Carboranes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800486] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Keisuke Ishita
- Division of Medicinal Chemistry & Pharmacognosy The Ohio State University 43210 Columbus Ohio USA
| | - Ahmed Khalil
- Division of Medicinal Chemistry & Pharmacognosy The Ohio State University 43210 Columbus Ohio USA
| | - Rohit Tiwari
- Division of Medicinal Chemistry & Pharmacognosy The Ohio State University 43210 Columbus Ohio USA
| | - Judith Gallucci
- Department of Chemistry & Biochemistry The Ohio State University 43210 Columbus Ohio USA
| | - Werner Tjarks
- Division of Medicinal Chemistry & Pharmacognosy The Ohio State University 43210 Columbus Ohio USA
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25
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Tang C, Zhang J, Xie Z. Direct Nucleophilic Substitution Reaction of Cage B−H Bonds by Grignard Reagents: A Route to Regioselective B4-Alkylation ofo-Carboranes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702347] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Cen Tang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Jiji Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
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26
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Tang C, Zhang J, Xie Z. Direct Nucleophilic Substitution Reaction of Cage B−H Bonds by Grignard Reagents: A Route to Regioselective B4-Alkylation ofo-Carboranes. Angew Chem Int Ed Engl 2017; 56:8642-8646. [DOI: 10.1002/anie.201702347] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Cen Tang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Jiji Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
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27
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Li H, Bai F, Yan H, Lu C, Bregadze VI. Iridium(III)-Catalyzed Selective Sulfonamidation ofo-Carborane with Sulfonyl Azide by Carboxylic Acid-Assisted B(4)-H Bond Activation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601537] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Huanhuan Li
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering; Nanjing University; 210093 Nanjing Jiangsu P. R. China
| | - Fan Bai
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering; Nanjing University; 210093 Nanjing Jiangsu P. R. China
| | - Hong Yan
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering; Nanjing University; 210093 Nanjing Jiangsu P. R. China
| | - Changsheng Lu
- State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering; Nanjing University; 210093 Nanjing Jiangsu P. R. China
| | - Vladimir I. Bregadze
- Russian Academy of Sciences; Laboratory of Organoaluminium and Organoboron Compounds; Vavilova St. 28 119991 Moscow Russia
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28
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Quan Y, Lyu H, Xie Z. Dehydrogenative cross-coupling of o-carborane with thiophenes via Ir-catalyzed regioselective cage B–H and C(sp2)–H activation. Chem Commun (Camb) 2017; 53:4818-4821. [DOI: 10.1039/c7cc01485f] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Iridium-catalyzed carboxylic acid directed site-selective B–H/C–H dehydrogenative cross-coupling of o-carborane with thiophenes has been achieved for the first time, leading to the preparation of 4-thienyl-o-carboranes in a simple one-pot process for potential applications in materials.
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Affiliation(s)
- Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin, N.T
- China
| | - Hairong Lyu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin, N.T
- China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin, N.T
- China
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29
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Axtell JC, Kirlikovali KO, Djurovich PI, Jung D, Nguyen VT, Munekiyo B, Royappa AT, Rheingold AL, Spokoyny AM. Blue Phosphorescent Zwitterionic Iridium(III) Complexes Featuring Weakly Coordinating nido-Carborane-Based Ligands. J Am Chem Soc 2016; 138:15758-15765. [PMID: 27934013 DOI: 10.1021/jacs.6b10232] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the development of a new class of phosphorescent zwitterionic bis(heteroleptic) Ir(III) compounds containing pyridyl ligands with weakly coordinating nido-carboranyl substituents. Treatment of phenylpyridine-based Ir(III) precursors with C-substituted ortho-carboranylpyridines in 2-ethoxyethanol results in a facile carborane deboronation and the formation of robust and highly luminescent metal complexes. The resulting nido-carboranyl fragments associate with the cationic Ir(III) center through primarily electrostatic interactions. These compounds phosphoresce at blue wavelengths (450-470 nm) both in a poly(methyl methacrylate) (PMMA) matrix and in solution at 77 K. These complexes display structural stability at temperatures beyond 300 °C and quantum yields greater than 40%. Importantly, the observed quantum yields correspond to a dramatic 10-fold enhancement over the previously reported Ir(III) congeners featuring carboranyl-containing ligands in which the boron cluster is covalently attached to the metal. Ultimately, this work suggests that the use of a ligand framework containing a weakly coordinating anionic component can provide a new avenue for designing efficient Ir(III)-based phosphorescent emitters.
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Affiliation(s)
- Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Kent O Kirlikovali
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Peter I Djurovich
- Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States
| | - Dahee Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Vinh T Nguyen
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Brian Munekiyo
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - A Timothy Royappa
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States.,Department of Chemistry, University of West Florida , 11000 University Parkway, Pensacola, Florida 32514, United States
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States.,California NanoSystems Institute (CNSI), University of California, Los Angeles , 570 Westwood Plaza, Los Angeles, California 90095, United States
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30
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Lyu H, Quan Y, Xie Z. Transition Metal Catalyzed Direct Amination of the Cage B(4)–H Bond in o-Carboranes: Synthesis of Tertiary, Secondary, and Primary o-Carboranyl Amines. J Am Chem Soc 2016; 138:12727-12730. [DOI: 10.1021/jacs.6b07086] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hairong Lyu
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong,
Shatin, N. T., Hong Kong, China
| | - Yangjian Quan
- 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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31
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Lyu H, Quan Y, Xie Z. Rhodium-Catalyzed Regioselective Hydroxylation of Cage B−H Bonds ofo-Carboranes with O2or Air. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605880] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hairong Lyu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
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32
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Lyu H, Quan Y, Xie Z. Rhodium-Catalyzed Regioselective Hydroxylation of Cage B−H Bonds ofo-Carboranes with O2or Air. Angew Chem Int Ed Engl 2016; 55:11840-4. [DOI: 10.1002/anie.201605880] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 08/08/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Hairong Lyu
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong; Shatin, N.T. Hong Kong China
| | - Yangjian Quan
- 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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33
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Cao K, Xu TT, Wu J, Jiang L, Yang J. Palladium catalyzed/silver tuned selective mono-/tetra-acetoxylation of o-carboranes via B–H activation. Chem Commun (Camb) 2016; 52:11446-11449. [DOI: 10.1039/c6cc06200h] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Silver tuned the selective mono-/tetra-acetoxylation of o-carboranes via palladium catalyzed B–H activation.
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Affiliation(s)
- Ke Cao
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials & School of Materials Science and Engineering
- Southwest University of Science and Technology Mianyang
- P. R. China
| | - Tao-Tao Xu
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials & School of Materials Science and Engineering
- Southwest University of Science and Technology Mianyang
- P. R. China
| | - Ji Wu
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials & School of Materials Science and Engineering
- Southwest University of Science and Technology Mianyang
- P. R. China
| | - Linhai Jiang
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials & School of Materials Science and Engineering
- Southwest University of Science and Technology Mianyang
- P. R. China
| | - Junxiao Yang
- State Key Laboratory Cultivation Base for Nonmetal Composite and Functional Materials & School of Materials Science and Engineering
- Southwest University of Science and Technology Mianyang
- P. R. China
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