1
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Milewski M, Caminade AM, Mallet-Ladeira S, Lledós A, Lönnecke P, Hey-Hawkins E. Carboranylphosphines: B9-Substituted Derivatives with Enhanced Reactivity for the Anchoring to Dendrimers. Chemistry 2024:e202303867. [PMID: 38214467 DOI: 10.1002/chem.202303867] [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: 11/21/2023] [Revised: 12/22/2023] [Accepted: 01/09/2024] [Indexed: 01/13/2024]
Abstract
Several ortho-carboranes bearing a phenoxy or a phenylamino group in the B9 position were prepared employing various protection and deprotection strategies. Following established protocols, dendritic compounds were synthesized from a hexachlorocyclotriphosphazene or thiophosphoryl chloride core, and possible anchoring options for the B9-substituted ortho-carboranes were investigated experimentally and theoretically (DFT). Furthermore, 1- or 1,2-phosphanyl-substituted carborane derivatives were obtained. The resulting diethyl-, diisopropyl-, di-tert-butyl-, diphenyl- or diethoxyphosphines bearing a tunable ortho-carborane moiety are intriguing ligands for future applications in homogeneous catalysis or the medicinal sector.
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Affiliation(s)
- Max Milewski
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
- Laboratoire de Chimie de Coordination du CNRS, Dendrimers and Heterochemistry, 205 Route de Narbonne, 31077, Toulouse cedex 4, France
- LCC-CNRS, Université de Toulouse, CNRS, Toulouse, France
| | - Anne-Marie Caminade
- Laboratoire de Chimie de Coordination du CNRS, Dendrimers and Heterochemistry, 205 Route de Narbonne, 31077, Toulouse cedex 4, France
- LCC-CNRS, Université de Toulouse, CNRS, Toulouse, France
| | - Sonia Mallet-Ladeira
- Laboratoire de Chimie de Coordination du CNRS, Dendrimers and Heterochemistry, 205 Route de Narbonne, 31077, Toulouse cedex 4, France
- LCC-CNRS, Université de Toulouse, CNRS, Toulouse, France
- Institut de Chimie de Toulouse, 118 Route de Narbonne, 31062, Toulouse cedex 9, France
| | - Agustí Lledós
- Universitat Autònoma de Barcelona, Departament de Química, 08193, Cerdanyola del Vallès, Barcelona, Catalonia, Spain
| | - Peter Lönnecke
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
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2
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Heinrich S, Benhaim H, Mattejat M, Pan D, DiMarco S, Wu G, Ménard G. Tuning Phosphine Oxide-Substituted ortho-Carboranes for Improved Biphasic Electrochemical UO 22+ Capture and Release. Inorg Chem 2023; 62:15076-15083. [PMID: 37671892 DOI: 10.1021/acs.inorgchem.3c01960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
We report the synthesis and characterization of a series of new, tunable 1,2-bis(diarylphosphine oxide)-ortho-carboranes, derivatives of our previously reported uranyl (UO22+) capture agent 1,2-(Ph2PO)2-1,2-C2B10H10 (POCb). The series features new cage-substituted variants of POCb, namely, 9-I-POCb (POCbI), 9,12-I2-POCb (POCbI2), 9,12-Me2-POCb (POCbMe2), 9,12-Et2-POCb (POCbEt2), and 4,5,7,8,9,10,11,12-Me8-POCb (POCbMe8). Aryl-substituted variants include 1,2-((4-MeO-Ph)2PO)2-Cb ((OMe)POCb) and 1,2-((4-F-Ph)2PO)2-Cb ((F)POCb). The effects of electron-withdrawing (EWG) and electron-donating (EDG) groups on resulting carborane redox potentials were assessed using electrochemical means, and the resulting Lewis basicities were quantified using empirical and competition-based NMR experiments. In organic solution, carboranes substituted with EWGs exhibited weaker coordination to UO22+, whereas those with EDGs exhibited stronger coordination. Similar to the previously reported unsubstituted POCb, the tunable new series of carboranes were electrochemically reduced and used for the biphasic capture of UO22+ from an aqueous to an organic phase and back again (release) through electrochemical oxidation. Extraction and back-extraction efficiencies were determined by analyses of the aqueous phases by ICP-OES. While all reduced nido-carboranes efficiently extracted UO22+ in high yields (78-88%)─with seemingly no correlation to the aforementioned measured Lewis basicities─we found the back-extraction of UO22+ to be significantly improved from POCb and, surprisingly, more closely related to their hydrophobic rather than their Lewis basic properties.
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Affiliation(s)
- Shannon Heinrich
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Hila Benhaim
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Maxwell Mattejat
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Daniel Pan
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Sydney DiMarco
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Gabriel Ménard
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada
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3
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Schulz J, Clauss R, Kazimir A, Holzknecht S, Hey-Hawkins E. On the Edge of the Known: Extremely Electron-Rich (Di)Carboranyl Phosphines. Angew Chem Int Ed Engl 2023; 62:e202218648. [PMID: 36573025 DOI: 10.1002/anie.202218648] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Indexed: 12/28/2022]
Abstract
The syntheses of the first B9-connected carboranylphosphines (B9-Phos) featuring two carboranyl moieties as well as access to B9-Phos ligands with bulky electron-donating substituents, previously deemed unattainable, is reported. The electrochemical properties of the B9-Phos ligands were investigated, revealing the ability of the mesityl derivatives to form stabilized phosphoniumyl radical cations. The B9-Phos ligands display an extremely electron-releasing character surpassing that of alkyl phosphines and commonly used N-heterocyclic carbenes. This is demonstrated by their very small Tolman electronic parameters (TEPs) as well as extremely low P-Se coupling constants. Cone angles and buried volumes attest to the high steric demand exerted by the (di)carboranyl phosphines. The dicarboranyl phosphine AuI complexes show superior catalytic performance in the hydroamination of alkynes compared to the monocarboranyl phosphine analogs.
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Affiliation(s)
- Jan Schulz
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Reike Clauss
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Aleksandr Kazimir
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Sieglinde Holzknecht
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
| | - Evamarie Hey-Hawkins
- Leipzig University, Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Johannisallee 29, 04103, Leipzig, Germany
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4
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Ren H, Zhang P, Xu J, Ma W, Tu D, Lu CS, Yan H. Direct B-H Functionalization of Icosahedral Carboranes via Hydrogen Atom Transfer. J Am Chem Soc 2023; 145:7638-7647. [PMID: 36946888 DOI: 10.1021/jacs.3c01314] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The efficient and selective functionalization of icosahedral carboranes (C2B10H12) at the boron vertexes is a long-standing challenge owing to the presence of 10 inert B-H bonds in a similar chemical environment. Herein, we report a new reaction paradigm for direct B-H functionalization of icosahedral carboranes via B-H homolysis enabled by a nitrogen-centered radical-mediated hydrogen atom transfer (HAT) strategy. Both the HAT process of the carborane B-H bond and the resulting boron-centered carboranyl radical intermediate have been confirmed experimentally. The reaction occurs at the most electron-rich boron vertex with the lowest B-H bond dissociation energy (BDE). Using this strategy, diverse carborane derivatization, including thiolation, selenation, alkynylation, alkenylation, cyanation, and halogenation, have been achieved in satisfactory yields under a photoinitiated condition in a metal-free and redox-neutral fashion. Moreover, the synthetic utility of the current protocol was also demonstrated by both the scale-up reaction and the construction of carborane-based functional molecules. Therefore, this methodology opens a radical pathway to carborane functionalization, which is distinct from the B-H heterolytic mechanism in the traditional strategies.
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Affiliation(s)
- Hongyuan Ren
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Ping Zhang
- 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
| | - Wenli Ma
- 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
| | - Chang-Sheng Lu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - 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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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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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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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; 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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8
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Schulz J, Sárosi MB, Hey‐Hawkins E. Exploring the Reactivity of B-Connected Carboranylphosphines in Frustrated Lewis Pair Chemistry: A New Frame for a Classic System. Chemistry 2022; 28:e202200531. [PMID: 35472172 PMCID: PMC9320892 DOI: 10.1002/chem.202200531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Indexed: 11/15/2022]
Abstract
The primary phosphines MesPH2 and tBuPH2 react with 9-iodo-m-carborane yielding B9-connected secondary carboranylphosphines 1,7-H2 C2 B10 H9 -9-PHR (R=2,4,6-Me3 C6 H2 (Mes; 1 a), tBu (1 b)). Addition of tris(pentafluorophenyl)borane (BCF) to 1 a, b resulted in the zwitterionic compounds 1,7-H2 C2 B10 H9 -9-PHR(p-C6 F4 )BF(C6 F5 )2 (2 a, b) through nucleophilic para substitution of a C6 F5 ring followed by fluoride transfer to boron. Further reaction with Me2 SiHCl prompted a H-F exchange yielding the zwitterionic compounds 1,7-H2 C2 B10 H9 -9-PHR(p-C6 F4 )BH(C6 F5 )2 (3 a, b). The reaction of 2 a, b with one equivalent of R'MgBr (R'=Me, Ph) gave the extremely water-sensitive frustrated Lewis pairs 1,7-H2 C2 B10 H9 -9-PR(p-C6 F4 )B(C6 F5 )2 (4 a, b). Hydrolysis of the B-C6 F4 bond in 4 a, b gave the first tertiary B-carboranyl phosphines with three distinct substituents, 1,7-H2 C2 B10 H9 -9-PR(p-C6 F4 H) (5 a, b). Deprotonation of the zwitterionic compounds 2 a, b and 3 a, b formed anionic phosphines [1,7-H2 C2 B10 H9 -9-PR(p-C6 F4 )BX(C6 F5 )2 ]- [DMSOH]+ (R=Mes, X=F (6 a), R=tBu, X=F (6 b); R=Mes, X=H (7 a), R=tBu, X=H (7 b)). Reaction of 2 a, b with an excess of Grignard reagents resulted in the addition of R' at the boron atom yielding the anions [1,7-H2 C2 B10 H9 -9-PR(p-C6 F4 )BR'(C6 F5 )2 ]- (R=Mes, R'=Me (8 a), R=tBu, R'=Me (8 b); R=Mes, R'=Ph (9 a), R=tBu, R'=Ph (9 b)) with [MgBr(Et2 O)n ]+ as counterion. The ability of the zwitterionic compounds 3 a, b to hydrogenate imines as well as the Brønsted acidity of 3 a were investigated.
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Affiliation(s)
- Jan Schulz
- Leipzig University, Faculty of Chemistry and Mineralogy Institute of Inorganic ChemistryJohannisallee 2904103LeipzigGermany
| | - Menyhárt B. Sárosi
- Leipzig University, Faculty of Chemistry and Mineralogy Wilhelm-Ostwald-Institute for Physical and Theoretical ChemistryLinnéstraße 204103LeipzigGermany
| | - Evamarie Hey‐Hawkins
- Leipzig University, Faculty of Chemistry and Mineralogy Institute of Inorganic ChemistryJohannisallee 2904103LeipzigGermany
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9
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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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10
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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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11
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Abstract
Synthesis, NMR spectral data and crystal structure of 9,12-dibromo derivative of ortho-carborane are reported.
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12
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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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13
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Synthesis and Catalytic Properties of Novel Ruthenacarboranes Based on nido-[5-Me-7,8-C2B9H10]2− and nido-[5,6-Me2-7,8-C2B9H9]2− Dicarbollide Ligands. Catalysts 2021. [DOI: 10.3390/catal11111409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The effect of methyl substituents in the lower belt of dicarbollide ligands on the redox potential of ruthenacarboranes based thereof, as well as the ability of the metallacarboranes obtained to catalyze radical polymerization with atom transfer were studied. For this purpose, a new approach to the synthesis of closo-ruthenacarboranes based on substituted dicarbollide ligands was developed and six new complexes 3,3-(Ph2P(CH2)4PPh2)-3-H-3-Cl-9-Me-12-X-closo-3,1,2-RuC2B9H9, 3,3,8-(Ph2P(CH2)4PPh-μ-(C6H4-o))-3-Cl-9-Me-12-X-closo-3,1,2-RuC2B9H8 and 3,3,4,8-(Ph2P(CH2)4P-μ-(C6H4-o)2)-3-Cl-9-Me-9-X-closo-3,1,2-RuC2B9H7 (X = H, Me) were synthetized and characterized by single crystal X-ray diffraction, NMR and ESR spectroscopy and MALDI TOF mass-spectrometry. Comparison of the values of the redox potentials of the synthesized ruthenium complexes in 1,2-dichloroethane with the values previously found for the corresponding ruthenacarboranes based on the parent dicarbollide anion showed that the introduction of methyl substituents into the carborane cage led to a decrease in the redox potentials of the complexes, which made them more preferable catalysts for ATRP. Test experiments on the polymerization of MMA showed that the synthesized ruthenacarboranes were effective catalysts for ATRP, the most active being the complex with two methyl groups and two ortho-phenylenecycloboronated fragments.
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14
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Zimina AM, Anufriev SA, Derendyaeva MA, Knyazeva NA, Somov NV, Malysheva YB, Sivaev IB, Grishin ID. Ruthenium Complexes of 5-MeC2B9-Carborane Ligand: Synthesis and Application in Polymerization Catalysis. DOKLADY CHEMISTRY 2021. [DOI: 10.1134/s0012500821060057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Jayaweera HDAC, Rahman MM, Pellechia PJ, Smith MD, Peryshkov DV. Free three-dimensional carborane carbanions. Chem Sci 2021; 12:10441-10447. [PMID: 34447536 PMCID: PMC8356735 DOI: 10.1039/d1sc02252k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/27/2021] [Indexed: 11/21/2022] Open
Abstract
Carbon atom functionalization via generation of carbanions is the cornerstone of carborane chemistry. In this work, we report the synthesis and structural characterization of free ortho-carboranyl [C2B10H11]-, a three-dimensional inorganic analog of the elusive phenyl anion that features a "naked" carbanion center. The first example of a stable, discrete C(H)-deprotonated carborane anion was isolated as a completely separated ion pair with a crown ether-encapsulated potassium cation. An analogous approach led to the isolation and structural characterization of a doubly deprotonated 1,1'-bis(o-carborane) anion [C2B10H10]2 2-, which is the first example of a discrete molecular dicarbanion. These reactive carbanions are key intermediates in carbon vertex chemistry of carborane clusters.
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Affiliation(s)
- H D A Chathumal Jayaweera
- Department of Chemistry and Biochemistry, University of South Carolina 631 Sumter St. Columbia South Carolina 29208 USA
| | - Md Mamdudur Rahman
- Department of Chemistry and Biochemistry, University of South Carolina 631 Sumter St. Columbia South Carolina 29208 USA
| | - Perry J Pellechia
- 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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16
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Abstract
The crystal structure of 1,12-diiodo-ortho-carborane 1,12-I2-1,2-C2B10H10 was determined by single crystal X-ray diffraction. In contrary to earlier studied 1,12-dibromo analogue 1,12-Br2-1,2- C2B10H10, its crystal packing is governed by the presence of the intermolecular I⋯I dihalogen bonds between the iodine atom attached to the carbon atom (acceptor) and the iodine atom attached to the antipodal boron atom (donor) of the carborane cage. The observed dihalogen bonds belong to the II type and are characterized by classical parameters: shortened I⋯I distance of 3.5687(9) Å, C–I⋯I angle of 172.61(11)° and B–I⋯I angle of 92.98(12)°.
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17
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Au YK, Xie Z. Recent Advances in Transition Metal-Catalyzed Selective B-H Functionalization ofo-Carboranes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200366] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yik Ki Au
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, P. R. China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong, P. R. China
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18
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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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19
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Kataki-Anastasakou A, Axtell JC, Hernandez S, Dziedzic RM, Balaich GJ, Rheingold AL, Spokoyny AM, Sletten EM. Carborane Guests for Cucurbit[7]uril Facilitate Strong Binding and On-Demand Removal. J Am Chem Soc 2020; 142:20513-20518. [PMID: 33253553 DOI: 10.1021/jacs.0c09361] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
High-affinity guests have been reported for the macrocyclic host cucurbit[7]uril (CB[7]), enabling widespread applications, but hindering CB[7] materials from being returned to their guest-free state for reuse. Here, we present polyhedral boron clusters (carboranes) as strongly binding, yet easily removable, guests for CB[7]. Aided by a Pd-catalyzed coupling of an azide anion, we prepared boron-functionalized 9-amino-ortho-carborane that binds to CB[7] with a Ka ≈ 1010 M-1. Upon basic treatment, ortho-carborane readily undergoes deboronation to yield anionic nido-carborane, a poor guest for CB[7], facilitating recovery of guest-free CB[7]. We showcase the utility of the modified ortho-carborane guest by recycling a CB[7]-functionalized resin. With this report, we introduce stimuli-responsive decomplexation as an additional consideration in the design of high-affinity host-guest complexes.
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Affiliation(s)
- Anna Kataki-Anastasakou
- 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
| | - Selena Hernandez
- 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
| | - Gary J Balaich
- Department of Chemistry, United States Air Force Academy, 2355 Fairchild Drive, Suite 2N-255, Air Force Academy, Colorado 80840, 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
| | - 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
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20
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One-Pot Synthesis of B-Aryl Carboranes with Sensitive Functional Groups Using Sequential Cobalt- and Palladium-Catalyzed Reactions. Catalysts 2020. [DOI: 10.3390/catal10111348] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The simple and efficient method was developed for the one-pot synthesis of B-substituted aryl derivatives of ortho-carborane with functional groups sensitive to organolithium and organomagnesium reagents using 9-iodo-ortho-carborane and generated in situ organozinc compounds. The method proposed was used to prepare a series of 9-aryl-ortho-carboranes, including those containing nitrile and ester groups, 9-RC6H4-1,2-C2B10H11 (R = p-Me, p-NMe2, p-OCH2OMe, o-OMe, p-OMe, o-CN, p-CN, o-COOEt, m-COOEt, and p-COOEt). It was demonstrated that the same approach can be used for synthesis of diaryl derivatives of ortho-carborane 9,12-(RC6H4)2-1,2-C2B10H10 (R = H, p-Me). The solid-state structures of 9-RC6H4-1,2-C2B10H11 (R = p-NMe2, p-OCH2OMe, o-OMe, o-CN, p-CN, m-COOEt, and p-COOEt) and 9,12-(p-MeC6H4)2-1,2-C2B10H10 were determined by single crystal X-ray diffraction.
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21
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Zhang Z, Zhang X, Yuan J, Yue C, Meng S, Chen J, Yu G, Che C. Transition‐Metal‐Catalyzed Regioselective Functionalization of Monophosphino‐
o‐
Carboranes. Chemistry 2020; 26:5037-5050. [DOI: 10.1002/chem.201905647] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/28/2020] [Indexed: 01/11/2023]
Affiliation(s)
- Zi‐Yang Zhang
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Xuepeng Zhang
- Laboratory of Computational and Drug DesignSchool of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate School Shenzhen 518055 P. R. China
- School of Chemistry and Chemical EngineeringShaanxi Normal University Xi'an 710119 P. R. China
| | - Jia Yuan
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Chang‐Duo Yue
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Sixuan Meng
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Jian Chen
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Guang‐Ao Yu
- Department Key Laboratory of Pesticide & Chemical BiologyMinistry of EducationChemical Biology CenterCollege of ChemistryCentral China Normal University Wuhan 430079 P. R. China
| | - Chi‐Ming Che
- State Key Laboratory of Synthetic Chemistry andDepartment of ChemistryThe University of Hong Kong Pokfulam Road Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation Shenzhen, Guangdong 518057 P. R. China
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22
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Cao B, Ding Y, Fang F, Chang J, Zhang J, Li S, Chen X. The stability of group 10 metal POCOP pincer complexes: decomposition/reconstruction pathways of the pincer backbone. Dalton Trans 2019; 48:13760-13768. [PMID: 31475715 DOI: 10.1039/c9dt02825k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organometallic chemists usually like to use the word robust to describe pincer ligand frameworks in metal pincer complexes. Although most transition metal pincer complexes are thermally stable, the pincer backbone frameworks can still decompose under certain circumstances. In order to explore the stability of the bis(phosphinite) (POCOP) pincer backbone in transition metal pincer complexes, group 10 metal POCOP pincer complexes were exposed to different nucleophilic and electrophilic conditions, respectively. It was found that the POCOP pincer backbone is stable under intermolecular nucleophilic conditions but cannot survive intramolecular nucleophilic attack; the POCOP pincer backbone is also stable under weak electrophilic conditions but the backbone can be completely destroyed by strong Lewis acids such as AlCl3. Possible decomposition/reconstruction pathways of the POCOP pincer ligand framework were proposed.
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Affiliation(s)
- Bula Cao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
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23
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Kellert M, Lönnecke P, Riedl B, Koebberling J, Hey-Hawkins E. Enlargement of a Modular System-Synthesis and Characterization of an s-Triazine-Based Carboxylic Acid Ester Bearing a Galactopyranosyl Moiety and an Enormous Boron Load. Molecules 2019; 24:E3288. [PMID: 31509949 PMCID: PMC6767515 DOI: 10.3390/molecules24183288] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 08/30/2019] [Indexed: 11/26/2022] Open
Abstract
The amount of boron accumulated in tumor tissue plays an important role regarding the success of the boron neutron capture therapy (BNCT). In this article, we report a modular system, combining readily available starting materials, like glycine, 1,3,5-triazine and the well-known 9-mercapto-1,7-dicarba-closo-dodecaborane(12), as well as α-d-galactopyranose for increased hydrophilicity, with a novel boron-rich tris-meta-carboranyl thiol.
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Affiliation(s)
- Martin Kellert
- Institute of Inorganic Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany.
| | - Peter Lönnecke
- Institute of Inorganic Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany.
| | - Bernd Riedl
- Bayer AG, Aprather Weg 18A, 42113 Wuppertal, Germany.
| | | | - Evamarie Hey-Hawkins
- Institute of Inorganic Chemistry, Faculty of Chemistry and Mineralogy, Leipzig University, Johannisallee 29, 04103 Leipzig, Germany.
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24
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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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25
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Quan Y, Tang C, Xie Z. Nucleophilic substitution: a facile strategy for selective B-H functionalization of carboranes. Dalton Trans 2019; 48:7494-7498. [PMID: 31026000 DOI: 10.1039/c9dt01140d] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vertex-specific functionalization of carboranes has received considerable research interest, due to the valuable application of carborane derivatives in medicine, coordination/organometallic chemistry and materials. In comparison with a protic cage C-H bond, cage B-H is hydridic and generally less polar, with a bond dissociation energy of ca. 108 kcal mol-1. These features make B-H activation quite different from that of the C-H bond. In addition, selectivity among ten very similar BH vertices in o-carborane is challenging yet crucial to the effective construction of carborane-based functional molecules. To address these issues, a brand new strategy of cage B-H nucleophilic substitution has recently been presented and developed for straightforward and regioselective cage B-H functionalization. The regioselectivity can be controlled by the electronic/steric properties of the cage carbon substituents. This Frontier article highlights the recent advancement in the nucleophilic cage B-H substitution of carboranes.
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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, New Territories, Hong Kong, China.
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26
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Quan Y, Xie Z. Controlled functionalization of o-carborane via transition metal catalyzed B–H activation. Chem Soc Rev 2019; 48:3660-3673. [DOI: 10.1039/c9cs00169g] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review summarizes recent advances in transition metal catalyzed vertex-specific BH functionalization of o-carborane for controlled synthesis of its derivatives.
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Affiliation(s)
- Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- New Territories
- China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- New Territories
- China
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27
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Gao Y, Cui PF, Aznarez F, Jin GX. Iridium-Induced Regioselective B−H and C−C Activations at Azo-Substitutedo-Carboranes. Chemistry 2018; 24:10357-10363. [DOI: 10.1002/chem.201801381] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 05/03/2018] [Indexed: 01/15/2023]
Affiliation(s)
- Yang Gao
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Peng-Fei Cui
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Francisco Aznarez
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
| | - Guo-Xin Jin
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry; Fudan University; Shanghai 200433 P.R. China
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28
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Quan Y, Qiu Z, Xie Z. Transition-Metal-Catalyzed Selective Cage B-H Functionalization of o-Carboranes. Chemistry 2018; 24:2795-2805. [PMID: 29148596 DOI: 10.1002/chem.201704937] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Indexed: 01/14/2023]
Abstract
Carboranes are a class of carbon-boron molecular clusters with unusual thermal and chemical stabilities. They have been proved as very useful building blocks in supramolecular design, optoelectronics, nanomaterials, boron neutron capture therapy agents and organometallic/coordination chemistry. Thus, the functionalization of o-carboranes has received growing interests. Over the past decades, most of the works in this area have been focused on cage carbon functionalization as the weakly acidic cage C-H proton can be readily deprotonated by strong bases. In sharp contrast, selective cage B-H activation/functionalization among chemically very similar ten B-H vertices is very challenging. Considering the differences in electron density of ten cage B-H bonds in o-carborane and the nature of transition metal complexes, we have tackled this selectivity issue by means of organometallic chemistry. Our strategy is as follows: using electron-rich transition metal catalysts for the functionalization of the most electron-deficient B(3,6)-H vertices (bonded to both cage CH vertices); using electron-deficient transition-metal catalysts for the functionalization of relatively electron-rich B(8,9,10,12)-H vertices (with no bonding to both cage CH vertices); and using the combination of directing groups and electrophilic transition metal catalysts for the functionalization of B(4,5,7,11)-H vertices (bonded to only one cage CH vertex). Successful applications of such a strategy result in the preparation of a large variety of cage B-functionalized carboranes in a regioselective and catalytic manner, which are inaccessible by other means. It is believed that as this field progresses, other cage B-functionalized carboranes are expected to be synthesized, and the results detailed in this concept article will further these efforts.
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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, New Territories, Hong Kong, P. R. China
| | - Zaozao Qiu
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P. R. China.,Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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29
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Oleshkevich EV, Rys EG, Bashilov VV, Petrovskii PV, Ol’shevskaya VA, Moiseev SK, Ponomaryov AB, Kalinin VN. Synthesis and 31P NMR study of chromium, molybdenum, and palladium complexes with 9-substituted 1,2-bis(diphenylphosphanyl)-o-carboranes. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217110123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Lyu H, Quan Y, Xie Z. Transition Metal Catalyzed, Regioselective B
(4)-Halogenation and B
(4,5)-Diiodination of Cage B−H Bonds in o
-Carboranes. Chemistry 2017; 23:14866-14871. [DOI: 10.1002/chem.201703006] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 11/12/2022]
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 P.R. China
| | - Yangjian Quan
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong P.R. China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong P.R. China
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31
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Design and synthesis of iodocarborane-containing ligands with high affinity and selectivity toward ERβ. Bioorg Med Chem Lett 2017; 27:4030-4033. [DOI: 10.1016/j.bmcl.2017.07.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 07/19/2017] [Accepted: 07/20/2017] [Indexed: 01/10/2023]
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32
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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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33
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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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34
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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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35
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Wingen LM, Scholz MS. B-Cyanodicarba-closo-dodecaboranes: Facile Synthesis and Spectroscopic Features. Inorg Chem 2016; 55:8274-6. [DOI: 10.1021/acs.inorgchem.6b01667] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lukas M. Wingen
- Pharmaceutical Institute, University of Bonn, An der Immenburg
4, D-53121 Bonn, Germany
| | - Matthias S. Scholz
- Pharmaceutical Institute, University of Bonn, An der Immenburg
4, D-53121 Bonn, Germany
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36
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Affiliation(s)
- Huimin Dai
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China
| | - Guifeng Liu
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China
| | - Xiaolei Zhang
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China
| | - Hong Yan
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China
| | - Changsheng Lu
- State Key Laboratory of Coordination
Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, People’s Republic of China
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37
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Kazakov GS, Sivaev IB, Suponitsky KY, Kirilin AD, Bregadze VI, Welch AJ. Facile synthesis of closo-nido bis(carborane) and its highly regioselective halogenation. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Zheng F, Leung TF, Chan KW, Sung HHY, Williams ID, Xie Z, Jia G. Phosphine-catalyzed cage carbon functionalization of o-carborane: facile synthesis of alkenylcarboranes. Chem Commun (Camb) 2016; 52:10767-70. [DOI: 10.1039/c6cc05283e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phosphines can efficiently catalyze alkenylation of o-carborane with electron-deficient alkynes, which represents the first example of organocatalysis in o-carborane functionalization.
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Affiliation(s)
- Fangrui Zheng
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Tsz-Fai Leung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Ka-Wing Chan
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Herman H. Y. Sung
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Ian D. Williams
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry
- The Chinese University of Hong Kong
- Shatin, N. T
- China
| | - Guochen Jia
- Department of Chemistry
- The Hong Kong University of Science and Technology
- Kowloon
- China
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39
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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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40
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Lyu H, Quan Y, Xie Z. Palladium-Catalyzed Direct Dialkenylation of Cage BH Bonds in o
-Carboranes through Cross-Coupling Reactions. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504481] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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41
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Lyu H, Quan Y, Xie Z. Palladium-Catalyzed Direct Dialkenylation of Cage BH Bonds in o
-Carboranes through Cross-Coupling Reactions. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504481] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Cao K, Huang Y, Yang J, Wu J. Palladium catalyzed selective mono-arylation of o-carboranes via B–H activation. Chem Commun (Camb) 2015; 51:7257-60. [DOI: 10.1039/c5cc01331c] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Palladium catalyzed selective mono-arylation of o-carborane on B(8) and B(9).
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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
| | - Yawen Huang
- 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
| | - 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
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43
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Wu J, Cao K, Xu TT, Zhang XJ, Jiang L, Yang J, Huang Y. Palladium catalyzed regioselective mono-alkenylation of o-carboranes via Heck type coupling reaction of a cage B–H bond. RSC Adv 2015. [DOI: 10.1039/c5ra18555f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Palladium catalyzed electrophilic B–H activation for regioselective mono-alkenylation of o-carborane on B(8) and B(9).
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Affiliation(s)
- 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
| | - 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
| | - Xiao-Juan Zhang
- 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
| | - Yawen Huang
- 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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44
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Jankowiak A, Kaszyński P. Practical Synthesis of 1,12-Difunctionalized o-Carborane for the Investigation of Polar Liquid Crystals. Inorg Chem 2014; 53:8762-9. [DOI: 10.1021/ic5014494] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aleksandra Jankowiak
- Organic Materials
Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Piotr Kaszyński
- Organic Materials
Research Group, Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- Section of Heteroorganic Compounds, University of Łódź, Tamka 12, 91403 Łódź, Poland
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45
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Kreienbrink A, Heinicke S, Duong Pham TT, Frank R, Lönnecke P, Hey-Hawkins E. Carbaborane-Substituted 1,2,3-Triphospholanes and 1-Aza-2,5-diphospholane: New Synthetic Approaches. Chemistry 2013; 20:1434-9. [DOI: 10.1002/chem.201302878] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Indexed: 11/10/2022]
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46
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Zhang J, Xie Z. Reaction of 13-vertex carborane μ-1,2-(CH2)4-1,2-C2B11H11 with nucleophiles: linkage effect on product formation. Inorg Chem 2013; 52:10677-84. [PMID: 23978282 DOI: 10.1021/ic401744h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The length of C,C'-linkage has a great influence on the reactivity of 13-vertex carboranes. Reaction of 1,2-(CH2)4-1,2-C2B11H11 (1a) with Et2NH gave a 1:1 adduct nido-7-NEt2H-μ-1,3-(CH2)4-1,3-C2B11H11 (2). Compound 1a reacted with Me2NLi or Et2NLi to afford nido-[9-Nu-μ-7,8,10-(CH2)4CCH-B11H10](-) (Nu = NMe2, [3](-); Nu = NEt2, [4](-)). Complex [4](-) was also obtained by deprotonation of 2. Treatment of 1a with MeOH/base generated nido-[3-OMe-μ-1,2-(CH2)4-1,2-C2B11H11](-) ([5](-)) at room temperature, which was converted to nido-[μ-7,8-(CH2)4CHB(OMe)2-7-CB10H11](-) ([6](-)) upon heating in the presence of Et3N. Complex [6](-) was oxidized by H2O2 to the corresponding alcohol [μ-7,8-(CH2)4CHOH-7-CB10H11](-) ([7](-)) or hydrolyzed to the boronic acid [μ-7,8-(CH2)4CHB(OH)2-7-CB10H11](-) ([8](-)). Reaction of 1a with (4-MeC6H4)SNa produced a CB11(-) anion closo-[μ-1,2-(CH2)4CHS(4-MeC6H4)-1-CB11H10](-) ([9](-)). The above complexes were fully characterized by (1)H, (13)C, and (11)B NMR spectroscopic data and elemental analyses. Molecular structures of 1-[7](-) and [9](-) were further confirmed by single-crystal X-ray analyses.
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Affiliation(s)
- Jian Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, China
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47
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Qiu Z, Quan Y, Xie Z. Palladium-Catalyzed Selective Fluorination of o-Carboranes. J Am Chem Soc 2013; 135:12192-5. [DOI: 10.1021/ja405808t] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Zaozao Qiu
- Shanghai-Hong Kong
Joint Laboratory
in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai
200032, China
| | - Yangjian Quan
- Department
of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong
Kong, China
| | - Zuowei Xie
- Shanghai-Hong Kong
Joint Laboratory
in Chemical Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai
200032, China
- 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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48
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Spokoyny AM, Lewis CD, Teverovskiy G, Buchwald SL. Extremely Electron-Rich, Boron-Functionalized, Icosahedral Carborane-Based Phosphinoboranes. Organometallics 2012; 31:8478-8481. [PMID: 23667288 DOI: 10.1021/om301116x] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have prepared the first examples of B9-connected trivalent aryl and alkyl phosphinoborane species via Pd-catalyzed phosphination of 9-iodo-meta-carborane. Our studies highlight the unique electronic features of the B9-connected meta-carboranyl moiety as compared to its C1-based analogue. This work suggests that the B9-functionalized meta-carboranyl substituent in these ligands exhibits more electron-releasing character than any other known carbon-based substituent, ultimately laying the foundation for a new class of phosphine ligands with extremely electron-rich character.
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Affiliation(s)
- Alexander M Spokoyny
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
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49
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Safronov AV, Sevryugina YV, Jalisatgi SS, Kennedy RD, Barnes CL, Hawthorne MF. Unfairly Forgotten Member of the Iodocarborane Family: Synthesis and Structural Characterization of 8-Iodo-1,2-dicarba-closo-dodecaborane, Its Precursors, and Derivatives. Inorg Chem 2012; 51:2629-37. [DOI: 10.1021/ic2025846] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Safronov
- International Institute of Nano
and Molecular Medicine (I2NM2), University of Missouri, Columbia, Missouri 65211, United
States
| | - Yulia V. Sevryugina
- International Institute of Nano
and Molecular Medicine (I2NM2), University of Missouri, Columbia, Missouri 65211, United
States
| | - Satish S. Jalisatgi
- International Institute of Nano
and Molecular Medicine (I2NM2), University of Missouri, Columbia, Missouri 65211, United
States
| | - Robert D. Kennedy
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208,
United States
| | - Charles L. Barnes
- Department
of Chemistry, University of Missouri, Columbia,
Missouri 65211, United
States
| | - M. Frederick Hawthorne
- International Institute of Nano
and Molecular Medicine (I2NM2), University of Missouri, Columbia, Missouri 65211, United
States
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50
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Safronov AV, Shlyakhtina NI, Hawthorne MF. New Approach to the Synthesis of 3-Alkyl-1,2-dicarba-closo-dodecaboranes: Reaction of Alkyldichloroboranes with Thallium Dicarbollide. Organometallics 2012. [DOI: 10.1021/om201060e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander V. Safronov
- International Institute
of Nano and Molecular Medicine
(I2NM2), University of Missouri−Columbia, 1514 Research Park Drive, Columbia MO65211, United States
| | - Natalia I. Shlyakhtina
- International Institute
of Nano and Molecular Medicine
(I2NM2), University of Missouri−Columbia, 1514 Research Park Drive, Columbia MO65211, United States
| | - M. Frederick Hawthorne
- International Institute
of Nano and Molecular Medicine
(I2NM2), University of Missouri−Columbia, 1514 Research Park Drive, Columbia MO65211, United States
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