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Sarkar SK, Hollister KK, Molino A, Obi AD, Deng CL, Tra BYE, Stewart BM, Dickie DA, Wilson DJD, Gilliard RJ. Bis(9-Boraphenanthrene) and Its Stable Biradical. J Am Chem Soc 2023; 145:21475-21482. [PMID: 37738168 DOI: 10.1021/jacs.3c07236] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Selective and site-specific boron-doping of polycyclic aromatic hydrocarbon frameworks often give rise to redox and/or photophysical properties that are not easily accessible with the analogous all-carbon systems. Herein, we report ligand-mediated control of boraphenanthrene closed- and open-shell electronic states, which has led to the first structurally characterized examples of neutral bis(9-boraphenanthrene) (2-3) and its corresponding biradical (4). Notably, compounds 2 and 3 show intramolecular charge transfer absorption from the 9-boraphenanthrene units to p-quinodimethane, exhibiting dual (red-shifted) emission in solution due to excited state conjugation enhancement (ESCE). Moreover, while boron-centered monoradicals are ubiquitous, biradical 4 represents a rare type of open-shell singlet compound with 95% biradical character, among the highest of any reported boron-based polycyclic species with two radical sites.
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Affiliation(s)
- Samir Kumar Sarkar
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Kimberly K Hollister
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Andrew Molino
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, 3086 Victoria, Australia
| | - Akachukwu D Obi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Chun-Lin Deng
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Bi Youan E Tra
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Brennan M Stewart
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Diane A Dickie
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - David J D Wilson
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, 3086 Victoria, Australia
| | - Robert J Gilliard
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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2
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Yang X, Chen X, Xu Y, Zhang M, Deng G, Yang Y, Liang Y. Palladium-Catalyzed [4 + 3] or [2 + 2 + 3] Annulation via C–H Activation and Subsequent Decarboxylation: Access to Heptagon-Embedded Polycyclic Aromatic Hydrocarbons. Org Lett 2021; 23:2610-2615. [DOI: 10.1021/acs.orglett.1c00520] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Xiumei Yang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Xiahong Chen
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Yankun Xu
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Minghao Zhang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Guobo Deng
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Yuan Yang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
| | - Yun Liang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, Ministry of Education, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, Hunan 410081, China
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3
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Zhao Q, Choy PY, Li L, Kwong FY. Recent explorations of palladium-catalyzed regioselective aromatic extension processes. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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4
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Zi L, Zhang J, Li C, Qu Y, Zhen B, Liu X, Zhang L. Synthesis, Properties, and Reactivity of Bis-BN Phenanthrenes: Stepwise Bromination of the Main Scaffold. Org Lett 2020; 22:1499-1503. [DOI: 10.1021/acs.orglett.0c00021] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lingjian Zi
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Jinyun Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Chenglong Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Yi Qu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Bin Zhen
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Xuguang Liu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University, Tianjin 300384, People’s Republic of China
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5
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Zhang C, Zhang L, Sun C, Sun W, Liu X. BN-Phenanthrenes: Synthesis, Reactivity, and Optical Properties. Org Lett 2019; 21:3476-3480. [DOI: 10.1021/acs.orglett.9b00530] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Chen Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Lei Zhang
- School of Science, Tianjin Chengjian University, Tianjin 300384, People’s Republic of China
| | - Chao Sun
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
| | - Wenfang Sun
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, North Dakota 58108-6050, United States
| | - Xuguang Liu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People’s Republic of China
- Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of China
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6
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Xiao G, Chen L, Deng G, Liu J, Liang Y. Disilylation of N-(2-Halophenyl)-2-phenylacrylamides with hexamethyldisilane via trapping the spirocyclic palladacycles. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.086] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Zhang W, Ekomo RE, Roussel C, Moriwaki H, Abe H, Han J, Soloshonok VA. Axially chiral Ni(II) complexes of α-amino acids: Separation of enantiomers and kinetics of racemization. Chirality 2018; 30:498-508. [PMID: 29359493 DOI: 10.1002/chir.22815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 12/07/2017] [Accepted: 12/11/2017] [Indexed: 01/27/2023]
Abstract
Herein we present design, synthesis, chiral HPLC resolution, and kinetics of racemization of axially chiral Ni(II) complexes of glycine and di-(benzyl)glycine Schiff bases. We found that while the ortho-fluoro derivatives are configurationally unstable, the pure enantiomers of corresponding axially chiral ortho-chloro-containing complexes can be isolated by preparative HPLC and show exceptional configurational stability (t1/2 from 4 to 216 centuries) at ambient conditions. Synthetic implications of this discovery for the development of new generation of axially chiral auxiliaries, useful for general asymmetric synthesis of α-amino acids, are discussed.
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Affiliation(s)
- Wenzhong Zhang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, China
| | - Romuald Eto Ekomo
- Aix Marseille Univ, CNRS, Centrale Marseille iSm2, Marseille, France
| | - Christian Roussel
- Aix Marseille Univ, CNRS, Centrale Marseille iSm2, Marseille, France
| | | | | | - Jianlin Han
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, China
| | - Vadim A Soloshonok
- Department of Organic Chemistry I, Faculty of Chemistry, University of the Basque Country UPV/EHU, San Sebastián, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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8
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Li W, Xiao G, Deng G, Liang Y. Pd-Catalyzed disilylation: an efficient route to 2,2′-bis(trimethylsilyl)biphenyls via trapping transient dibenzopalladacyclopentadienes with hexamethyldisilane. Org Chem Front 2018. [DOI: 10.1039/c8qo00189h] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A palladium-catalyzed disilylation reaction of 2-iodobiphenyls with hexamethyldisilane via trapping transient dibenzopalladacyclopentadienes has been achieved.
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Affiliation(s)
- Wenguang Li
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Key Laboratory of the Assembly and Application of Organic Functional Molecules
- Hunan Normal University
| | - Genhua Xiao
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Key Laboratory of the Assembly and Application of Organic Functional Molecules
- Hunan Normal University
| | - Guobo Deng
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Key Laboratory of the Assembly and Application of Organic Functional Molecules
- Hunan Normal University
| | - Yun Liang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research
- Ministry of Education
- Key Laboratory of the Assembly and Application of Organic Functional Molecules
- Hunan Normal University
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9
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Zhang Y, Lavigne G, Lugan N, César V. Buttressing Effect as a Key Design Principle towards Highly Efficient Palladium/N-Heterocyclic Carbene Buchwald-Hartwig Amination Catalysts. Chemistry 2017; 23:13792-13801. [DOI: 10.1002/chem.201702859] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Yin Zhang
- LCC-CNRS; Université de Toulouse, INPT, UPS; Toulouse France
| | - Guy Lavigne
- LCC-CNRS; Université de Toulouse, INPT, UPS; Toulouse France
| | - Noël Lugan
- LCC-CNRS; Université de Toulouse, INPT, UPS; Toulouse France
| | - Vincent César
- LCC-CNRS; Université de Toulouse, INPT, UPS; Toulouse France
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