1
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Li HY, Niu X, Zhang SS, Shen S, Meng QY, Yang XL. Intramolecular Dehydrogenative Photocyclization of N-Phenyl-1-naphthamides. Org Lett 2024; 26:5364-5369. [PMID: 38874571 DOI: 10.1021/acs.orglett.4c01805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Here, we explore a dehydrogenative 6π photocyclization method for N-substituted naphthalene carboxamides, which can be conducted in air. This method employs DMSO as both the reaction solvent and oxidant while also stabilizing the excited state of the substrate. Furthermore, the addition of photosensitizer enables the reaction to proceed under a 440-445 nm LED source via energy transfer. The proposed mechanism is initially validated through DFT calculations.
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Affiliation(s)
- Hao-Yuan Li
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Chemical Biology of Hebei Province (22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Xiaoying Niu
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Chemical Biology of Hebei Province (22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Shan-Shan Zhang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Chemical Biology of Hebei Province (22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Shigang Shen
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Chemical Biology of Hebei Province (22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
| | - Qing-Yuan Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiu-Long Yang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei Research Center of the Basic Discipline of Synthetic Chemistry, Key Laboratory of Chemical Biology of Hebei Province (22567635H), College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China
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2
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Martin K, Aharon T, Mastropasqua Talamo M, Hauser A, Bürgi T, Vanthuyne N, Caricato M, Avarvari N. Helicene Appended Benzothiadiazoles as Chiral Emitters. Chemistry 2024:e202401413. [PMID: 38770893 DOI: 10.1002/chem.202401413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/22/2024]
Abstract
A homologous series of 4,7-bis(aryl) substituted benzothiadiazole (BTD) compounds, containing the helicenic derivatives bis([4]helicene), bis([5]helicene) and bis([6]helicene), have been prepared upon a double Suzuki coupling between 3,6-bis(pinacolyl-borane)-BTD and the corresponding bromo-aryl precursors. The single crystal X-ray structure of the bis([4]helicene) compound shows the existence of both helicities (M) and (P) on the same molecule. All the compounds of the series are highly emissive in solution, with quantum yields of the emission ranging from 50 to 91 %. The enantiopure compounds (M,M) and (P,P) for the BTD-bis([6]helicene) have been prepared from the corresponding enantiopure 2-bromo-[6]helicene precursors. Their chiroptical properties have been investigated in correlation with density functional theory (DFT) calculations, which allowed to confidently assign the absolute configuration of the helicene arms and to characterize the different electronic transitions, including the low energy charge transfer excitation from helicenes to BTD. The enantiomerically pure fluorophores (M,M)- and (P,P)-BTD-bis([6]helicene), which exist in solution as two main conformers, according to the DFT calculations, show CPL activity in solution, with glum factors of ≈1.7×10-3 at λem=525 nm, and also in the solid state, with glum factors of ≈1.2×10-3 in spite of the strong decrease of the quantum efficiency.
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Affiliation(s)
- Kévin Martin
- Univ Angers, CNRS, MOLTECH-Anjou SFR MATRIX, F-49000, Angers, France
| | - Tal Aharon
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas, 66045, United States of America
- TetraScience, 294 Washington St, Boston, MA 02108, United States of America
| | | | - Andreas Hauser
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest Ansermet, CH-1211, Geneva, Switzerland
| | - Thomas Bürgi
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest Ansermet, CH-1211, Geneva, Switzerland
| | - Nicolas Vanthuyne
- Aix Marseille Univ, CNRS, Centrale Marseille UAR, 1739, FSCM, Chiropole, Marseille, France
| | - Marco Caricato
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas, 66045, United States of America
| | - Narcis Avarvari
- Univ Angers, CNRS, MOLTECH-Anjou SFR MATRIX, F-49000, Angers, France
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3
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Zhang Y, Wang J, Guo Y, Liu S, Shen X. Carbonyl Olefin Metathesis and Dehydrogenative Cyclization of Aromatic Ketones and gem-Difluoroalkenes. Angew Chem Int Ed Engl 2023:e202315269. [PMID: 38065839 DOI: 10.1002/anie.202315269] [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: 10/10/2023] [Indexed: 12/23/2023]
Abstract
The beauty of one-pot cascade reaction lies in the efficient disconnection and construction of several bonds in a single reaction flask, without the isolation of any intermediates. Herein, we report the first photoinduced thermally promoted cascade reactions of readily available aromatic ketones and aromatic gem-difluoroalkenes for the synthesis of phenanthrenes which possess potential utility in drug design and materials science. The reaction combines carbonyl-olefin metathesis (cascade photoinduced [2+2] cyclization and thermally controlled retro [2+2] cyclization) and dehydrogenative cyclization (cascade photoinduced conrotatory 6π electrocyclization and collidine-promoted dehydrogenative aromatization) together in one pot. The oxidant-free, acid-free and metal-free reaction shows broad substrate scope and wide functional group tolerance.
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Affiliation(s)
- Yunxiao Zhang
- The Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
- Shenzhen Research Institute of Wuhan University, Shenzhen, 518057, China
| | - Jiaxin Wang
- The Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
- Shenzhen Research Institute of Wuhan University, Shenzhen, 518057, China
| | - Youyuan Guo
- The Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
- Shenzhen Research Institute of Wuhan University, Shenzhen, 518057, China
| | - Shanshan Liu
- The Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
- Shenzhen Research Institute of Wuhan University, Shenzhen, 518057, China
| | - Xiao Shen
- The Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
- Shenzhen Research Institute of Wuhan University, Shenzhen, 518057, China
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4
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Qu D, Li L, Qin Y, Liu Y, Li G, Qi T, Liu Y. Synthesis and Derivatization of an Isomerized Bithiophene Imide (iBTI) Acceptor with a Controllably Twisted Backbone. Org Lett 2023; 25:938-943. [PMID: 36739543 DOI: 10.1021/acs.orglett.2c04262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A heptagonal isomerized bithiophene imide (iBTI) acceptor has been effectively synthesized on a gram scale. Its series of β-, α',β-, α,α'-, α,α',β-, and α,α',β,β'-substituted derivatives can be obtained by controlling brominated sites. Single-crystal analyses indicate that the torsion angle of the imide backbone depends on the number and rigidity of β-substituted groups. Furthermore, the helical chirality of tetrasubstituted and [7]helicene-like derivatives based on iBTI shows great promise for the construction of chiral semiconductor materials.
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Affiliation(s)
- Dunshuai Qu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Linkuo Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Yuanyuan Qin
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China.,Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Yanwei Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
| | - Guoping Li
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Ting Qi
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Yunqi Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry Chinese Academy of Sciences, Beijing 100190, China
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5
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Wang XY, He YQ, Wang M, Zhou Y, Li N, Song XR, Zhou ZZ, Tian WF, Xiao Q. Visible-light-driven proton reduction for semi-hydrogenation of alkynes via organophotoredox/manganese dual catalysis. RSC Adv 2022; 12:36138-36141. [PMID: 36545070 PMCID: PMC9761695 DOI: 10.1039/d2ra07920h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Described here is a unprecedented organophotoredox/manganese dual catalyzed proton reduction and its application for semi-reduction of alkynes. The catalytic active pre-catalyst [Mn-1] can be feasibly be prepared on gram-scale from Mn(acac)2·2H2O in air. This dual catalytic protocol features noble-metal-free catalysts, simple ligand, and mild conditions. Besides, a unique ortho-halogen and -hydroxyl effect was observed to achieve high Z-stereoselectivity.
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Affiliation(s)
- Xiao-Yu Wang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
| | - Yong-Qin He
- School of Pharmaceutical Science, Nanchang UniversityNanchang330006P. R. China
| | - Mei Wang
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
| | - Yi Zhou
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
| | - Na Li
- School of Pharmaceutical Science, Nanchang UniversityNanchang330006P. R. China
| | - Xian-Rong Song
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
| | - Zhao-Zhao Zhou
- College of Chemistry and Food Science, Nanchang Normal UniversityNanchangP. R. China
| | - Wan-Fa Tian
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
| | - Qiang Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science & Technology Normal UniversityNanchang330013P. R. China
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6
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Tiruye HM, Jørgensen KB. Oxidative synthesis of ortho-quinones from hydroxy-PAHs by stabilized formulation of 2-iodoxybenzoic acid (SIBX). Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Tadros J, Dankers C, Aldrich‐Wright JR, Polyzos A, Gordon CP. A Solid‐Phase Assisted Flow Approach to
In Situ
Wittig‐Type Olefination Coupling. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100761] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Joseph Tadros
- School of Science Western Sydney University 1797 Locked Bag Penrith South DC Australia
| | - Christian Dankers
- School of Science Western Sydney University 1797 Locked Bag Penrith South DC Australia
| | - Janice R. Aldrich‐Wright
- School of Science Western Sydney University 1797 Locked Bag Penrith South DC Australia
- Nanoscale Organisation and Dynamics Group Western Sydney University 1797 Locked Bag Penrith South DC Australia
| | - Anastasios Polyzos
- CSIRO Manufacturing The Commonwealth Scientific and Industrial Research Organisation Research Way 3168 Clayton Victoria Australia
- School of Chemistry The University of Melbourne 3010 Melbourne Victoria Australia
| | - Christopher P. Gordon
- School of Science Western Sydney University 1797 Locked Bag Penrith South DC Australia
- Nanoscale Organisation and Dynamics Group Western Sydney University 1797 Locked Bag Penrith South DC Australia
- Molecular Medicine Research Group Nanoscale Organisation and Dynamics Group Western Sydney University School of Medicine Narellan Road & Gilchrist Drive 2560 Campbelltown NSW Australia
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8
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Yadykov AV, Lvov AG, Krayushkin MM, Zakharov AV, Shirinian VZ. Photocyclization of Diarylethenes: The Effect of Electron and Proton Acceptors as Additives. J Org Chem 2021; 86:10023-10031. [PMID: 34314191 DOI: 10.1021/acs.joc.1c00723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The effect of electron and proton acceptors on the photocyclization of diarylethenes has been studied. Without any additives, the deprotonation reaction is predominant, although other processes, including the sigmatropic shift, are not excluded. A deuterium exchange experiment has shown that a strong base (DABCO) facilitates the deprotonation reaction, thereby limiting the sigmatropic shift. In the presence of an oxidizing agent or additional sources of radicals (O2, I2, TEMPO), the processes of deprotonation and rearrangement (H-shift) are practically not observed, and the reaction proceeds along a radical pathway with the formation of phenanthrene or its heterocyclic analogue.
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Affiliation(s)
- Anton V Yadykov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, Moscow 119991, Russian Federation
| | - Andrey G Lvov
- Irkutsk National Research Technical University, 83, Lermontov Street, Irkutsk 664074, Russian Federation
| | - Mikhail M Krayushkin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, Moscow 119991, Russian Federation
| | - Alexey V Zakharov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, Moscow 119991, Russian Federation
| | - Valerii Z Shirinian
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47, Leninsky Prospect, Moscow 119991, Russian Federation
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9
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Baciu B, Vergés JA, Guijarro A. Exploring the Photocyclization Pathways of Styrylthiophenes in the Synthesis of Thiahelicenes: When the Theory and Experiment Meet. J Org Chem 2021; 86:5668-5679. [PMID: 33769823 PMCID: PMC8459451 DOI: 10.1021/acs.joc.1c00147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Indexed: 12/04/2022]
Abstract
The introduction of thiophene rings to the helical structure of carbohelicenes has electronic effects that may be used advantageously in organic electronics. The performance of these devices is highly dependent on the sulfur atom topology, so a precise knowledge of the synthetic routes that may afford isomeric structures is necessary. We have studied the photocyclization pathway of both 2- and 3-styrylthiophenes on their way to thiahelicenes by experiment and theory. To begin with, the synthesis of stereochemically well-defined 2- and 3-styrylthiophenes allowed us to register first, and simulate later, the UV-vis electronic spectra of these precursors. This information gave us access through time-dependent density functional theory calculations to the very nature of the excited states involved in the photocyclization step and from there to the regio- and stereochemical outcome of the reaction. For the widely known case of a 2-styrylthiophene derivative, the expected naphtho[2,1-b]thiophene type of ring fusion was predicted and experimentally observed by synthesis. On the contrary, 3-styrylthiophene derivatives have been seldom used in synthetic photocyclizations. Among the two possible structural outcomes, only the naphtho[1,2-b]thiophene type of ring fusion was found to be mechanistically sound, and this was actually the only compound observed by synthesis.
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Affiliation(s)
- Bianca
C. Baciu
- Departamento
de Química Orgánica and Instituto Universitario de Síntesis
Orgánica, Campus de San Vicente del Raspeig, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
| | - José Antonio Vergés
- Departamento
de Teoría y Simulación de Materiales, Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, 28049 Madrid, Spain
| | - Albert Guijarro
- Departamento
de Química Orgánica and Instituto Universitario de Síntesis
Orgánica, Campus de San Vicente del Raspeig, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain
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10
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Lichitsky BV, Milyutin CV, Melekhina VG, Fakhrutdinov AN, Komogortsev AN, Krayushkin MM. Photochemical synthesis of novel naphtho[1,2-b]benzofuran derivatives from 2,3-disubstituted benzofurans. Chem Heterocycl Compd (N Y) 2021. [DOI: 10.1007/s10593-021-02861-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Zhao H, Ni N, Li X, Cheng D, Xu X. The coupling reaction of α-silylamines with Baylis-Hillman adducts by visible light photoredox catalysis. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152746] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Jiang Z, Niu SL, Zeng Q, Ouyang Q, Chen YC, Xiao Q. Selective Alkynylallylation of the C-C σ Bond of Cyclopropenes. Angew Chem Int Ed Engl 2021; 60:297-303. [PMID: 32909645 DOI: 10.1002/anie.202008886] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/12/2020] [Indexed: 01/04/2023]
Abstract
A Pd-catalyzed regio- and stereoselective alkynylallylation of a specific C-C σ bond in cyclopropenes, using allyl propiolates as both allylation and alkynylation reagents, has been achieved for the first time. By merging selective C(sp2 )-C(sp3 ) bond scission with conjunctive cross-couplings, this decarboxylative reorganization reaction features fascinating atom and step economy and provides an efficient approach to highly functionalized dienynes from readily available substrates. Without further optimization, gram-scale products can be easily obtained by such a simple, neutral, and low-cost catalytic system with high TONs. DFT calculations afford a rationale toward the formation of the products and indicate that the selective insertion of the double bond of cyclopropenes into the C-Pd bond of ambidentate Pd complex and the subsequent nonclassical β-C elimination promoted by 1,4-palladium migration are critical for the success of the reaction.
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Affiliation(s)
- Zeqi Jiang
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
| | - Sheng-Li Niu
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
| | - Qiang Zeng
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
| | - Qin Ouyang
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
| | - Ying-Chun Chen
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
| | - Qing Xiao
- School of Pharmacy, Third Military Medical University, Gao Tanyan Avenue, Chongqing, 400038, China
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13
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Seylar J, Stasiouk D, Simone DL, Varshney V, Heckler JE, McKenzie R. Breaking the bottleneck: stilbene as a model compound for optimizing 6π e − photocyclization efficiency. RSC Adv 2021; 11:6504-6508. [PMID: 35423190 PMCID: PMC8694910 DOI: 10.1039/d0ra10619d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 01/25/2021] [Indexed: 01/28/2023] Open
Abstract
TEMPO was more suitable at photocyclizing stilbene than iodine. As stilbene concentration increased, TEMPO produced a higher yield of phenanthrene at shorter times and significantly reduced the potential for undesired [2+2] cycloadditions. Iodine retarded phenanthrene formation because it promoted isomerization to (E)-stilbene which encouraged [2+2] cycloaddition. TEMPO is more effective than iodine in free-radical mediated, photochemical oxidative cyclization of stilbenes at elevated concentrations.![]()
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Affiliation(s)
- Joshua Seylar
- School of Polymer Science and Polymer Engineering
- The University of Akron
- Akron
- USA
| | | | - Davide L. Simone
- Materials and Manufacturing Directorate
- Air Force Research Laboratory
- WPAFB
- USA
| | - Vikas Varshney
- Materials and Manufacturing Directorate
- Air Force Research Laboratory
- WPAFB
- USA
| | - James E. Heckler
- Materials and Manufacturing Directorate
- Air Force Research Laboratory
- WPAFB
- USA
- ARCTOS Technology Solutions
| | - Ruel McKenzie
- School of Polymer Science and Polymer Engineering
- The University of Akron
- Akron
- USA
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14
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Yao L, Fang B, Hu Q, Lei Y, Bao L, Hu Y. Phenanthrenes/dihydrophenanthrenes: the selectivity controlled by different benzynes and allenes. Chem Commun (Camb) 2020; 56:15185-15188. [PMID: 33216071 DOI: 10.1039/d0cc06300b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A method for the intermolecular annulation of benzynes with allenes is disclosed. This protocol utilized allenes as an unconventional diene component for the selective synthesis of phenanthrenes and dihydrophenanthrenes under the control of different benzyne precursors, featuring high atom-economy and good functional group compatibility. Density functional theory (DFT) calculations reveal that different migratory routes of the aromatic C-H bond are crucial for the observed selectivity.
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Affiliation(s)
- Liangliang Yao
- Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Key Laboratory of Molecular-Based Materials, School of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China.
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15
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Jiang Z, Niu S, Zeng Q, Ouyang Q, Chen Y, Xiao Q. Selective Alkynylallylation of the C−C σ Bond of Cyclopropenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202008886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zeqi Jiang
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
| | - Sheng‐Li Niu
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
| | - Qiang Zeng
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
| | - Qin Ouyang
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
| | - Ying‐Chun Chen
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
| | - Qing Xiao
- School of Pharmacy Third Military Medical University Gao Tanyan Avenue Chongqing 400038 China
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16
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Li T, Zhao W, Yang H, Dong W, Wang W. Stereoselective Rhodium-Catalyzed Isomerization of Stereoisomeric Mixtures of Arylalkenes. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A new efficient method for the synthesis of a high ratio of E-alkenes from E/Z mixtures of alkenes with B2pin2 in the presence of a rhodium catalyst is described. This reaction features mild reaction conditions, broad functional group tolerance, and highly great application potential.
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Affiliation(s)
| | - Wanxiang Zhao
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University
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17
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Synthesis of 1H-pyrano[4,3-b]benzofuran-1-one derivatives via photochemical cyclization of substituted 4H-furo[3,2-c]pyran-4-ones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152469] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Kos M, Žádný J, Storch J, Církva V, Cuřínová P, Sýkora J, Císařová I, Kuriakose F, Alabugin IV. Oxidative Photocyclization of Aromatic Schiff Bases in Synthesis of Phenanthridines and Other Aza-PAHs. Int J Mol Sci 2020; 21:ijms21165868. [PMID: 32824231 PMCID: PMC7461585 DOI: 10.3390/ijms21165868] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/30/2022] Open
Abstract
The oxidative photocyclization of aromatic Schiff bases was investigated as a potential method for synthesis of phenanthridine derivatives, biologically active compounds with medical applications. Although it is possible to prepare the desired phenanthridines using such an approach, the reaction has to be performed in the presence of acid and TEMPO to increase reaction rate and yield. The reaction kinetics was studied on a series of substituted imines covering the range from electron-withdrawing to electron-donating substituents. It was found that imines with electron-withdrawing substituents react one order of magnitude faster than imines bearing electron-donating groups. The 1H NMR monitoring of the reaction course showed that a significant part of the Z isomer in the reaction is transformed into E isomer which is more prone to photocyclization. The portion of the Z isomer transformed showed a linear correlation to the Hammett substituent constants. The reaction scope was expanded towards synthesis of larger aromatic systems, namely to the synthesis of strained aromatic systems, e.g., helicenes. In this respect, it was found that the scope of oxidative photocyclization of aromatic imines is limited to the formation of no more than five ortho-fused aromatic rings.
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Affiliation(s)
- Martin Kos
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Jaroslav Žádný
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Jan Storch
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Vladimír Církva
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
- Correspondence: (V.C.); (J.S.); (I.V.A.)
| | - Petra Cuřínová
- Department of Analytical Chemistry, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic;
| | - Jan Sýkora
- Department of Analytical Chemistry, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic;
- Correspondence: (V.C.); (J.S.); (I.V.A.)
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic;
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA;
| | - Igor. V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA;
- Correspondence: (V.C.); (J.S.); (I.V.A.)
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19
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Baciu BC, de Ara T, Sabater C, Untiedt C, Guijarro A. Helical nanostructures for organic electronics: the role of topological sulfur in ad hoc synthesized dithia[7]helicenes studied in the solid state and on a gold surface. NANOSCALE ADVANCES 2020; 2:1921-1926. [PMID: 36132536 PMCID: PMC9417725 DOI: 10.1039/d0na00045k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/15/2020] [Indexed: 05/28/2023]
Abstract
As the first of a series of molecular solenoids, two classes of dithia[7]helicenes (coil-shaped molecules with sulfur atoms integrated within a helical conjugated system) have been devised and synthesized to be used in molecular electronics. We used a modular assembly of fragments using Pd catalyzed coupling reactions and a final photocyclization step for the syntheses; this strategy gave us straightforward access to helicenes bearing thiophene end rings with either exo or endo topologies. Unequivocal structural characterization was carried out by X-ray crystallography. In the solid state, their crystal architectures show little similarities; both can be considered an ensemble of heterochiral dimers (P/M) that are themselves very different in nature in light of their main pairing interactions. On a gold surface, the effect of the sulfur atom is to strengthen their binding to the electrodes, as manifested by scanning tunneling microscopy (STM) performed at room temperature. Different coating patterns were observed for each class of molecule, although the most prominent finding is that we could see resolved STM images of a single molecule, with a full display of its inherent chirality under room temperature conditions.
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Affiliation(s)
- Bianca C Baciu
- Departamento de Química Orgánica, Instituto Universitario de Síntesis Orgánica, Unidad asociada al CSIC, Universidad de Alicante Campus de San Vicente del Raspeig E-03080 Alicante Spain
| | - Tamara de Ara
- Departamento de Física Aplicada, Unidad asociada al CSIC, Universidad de Alicante Campus de San Vicente del Raspeig E-03080 Alicante Spain
| | - Carlos Sabater
- Departamento de Física Aplicada, Unidad asociada al CSIC, Universidad de Alicante Campus de San Vicente del Raspeig E-03080 Alicante Spain
| | - Carlos Untiedt
- Departamento de Física Aplicada, Unidad asociada al CSIC, Universidad de Alicante Campus de San Vicente del Raspeig E-03080 Alicante Spain
| | - Albert Guijarro
- Departamento de Química Orgánica, Instituto Universitario de Síntesis Orgánica, Unidad asociada al CSIC, Universidad de Alicante Campus de San Vicente del Raspeig E-03080 Alicante Spain
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20
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Lichitskii BV, Melekhina VG, Komogortsev AN, Milyutin CV, Fakhrutdinov AN, Gorbunov YO, Krayushkin MM. Synthesis of substituted naphtho[1,2-b]benzofuran-7(8H)-ones via photoinduced rearrangement of 4H-chromen-4-one derivatives. Org Biomol Chem 2020; 18:2501-2509. [DOI: 10.1039/d0ob00149j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A simple and efficient method was developed for the synthesis of substituted naphtho[1,2-b]benzofuran-7(8H)-ones based on the photorearrangement reaction of 4H-chromen-4-one derivatives.
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Affiliation(s)
- Boris V. Lichitskii
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Valeriya G. Melekhina
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Andrey N. Komogortsev
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Constantine V. Milyutin
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Artem N. Fakhrutdinov
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Yury O. Gorbunov
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
| | - Michail M. Krayushkin
- N.D. Zelinsky Institute of Organic Chemistry
- Russian Academy of Sciences
- Moscow 119991
- Russian Federation
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21
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Singh V, Verma RS, Khatana AK, Tiwari B. Construction of Phenanthrenes and Chrysenes from β-Bromovinylarenes via Aryne Diels–Alder Reaction/Aromatization. J Org Chem 2019; 84:14161-14167. [DOI: 10.1021/acs.joc.9b01644] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Vikram Singh
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Ram Subhawan Verma
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Anil K. Khatana
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Bhoopendra Tiwari
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
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22
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Melekhina VG, Komogortsev AN, Lichitsky BV, Mityanov VS, Fakhrutdinov AN, Dudinov AA, Migulin VA, Nelyubina YV, Melnikova EK, Krayushkin MM. Unexpected photochemical transformation of imidazole derivatives containing the 5-hydroxy-2-methyl-4H-pyran-4-one moiety. Environmentally friendly method for the synthesis of substituted imidazo[1,5-a]pyridine-5,8-diones. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151080] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Prasad SS, Singh DK, Kim I. One-Pot, Three-Component Approach to Diarylmethylphosphonates: A Direct Entry to Polycyclic Aromatic Systems. J Org Chem 2019; 84:6323-6336. [PMID: 30990320 DOI: 10.1021/acs.joc.9b00668] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A new type of three-component reaction was developed consisting of aldehydes, electron-rich (hetero)arenes, and trialkyl phosphite, which provided facile access to a wide range of diarylmethylphosphonates under mild reaction conditions. Simple one- or two-step synthetic manipulation of the resulting compounds enabled us to reach several polycyclic (hetero)aromatic systems efficiently.
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Affiliation(s)
- Sure Siva Prasad
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences , Yonsei University , 85 Songdogwahak-ro , Yeonsu-gu, Incheon 21983 , Republic of Korea
| | - Dileep Kumar Singh
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences , Yonsei University , 85 Songdogwahak-ro , Yeonsu-gu, Incheon 21983 , Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences , Yonsei University , 85 Songdogwahak-ro , Yeonsu-gu, Incheon 21983 , Republic of Korea
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24
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Chen S, Ge Z, Jia Q, Wang K, Gan L, Hu Z. The Preparation of Enantiopure [6]‐ and [7]Helicenes from Binaphthanol. Chem Asian J 2019; 14:1462-1466. [DOI: 10.1002/asia.201900210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/14/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Shaojin Chen
- State Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology 53, Zhengzhou Rd. Qingdao Shandong P. R. China
| | - Zhaohai Ge
- State Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology 53, Zhengzhou Rd. Qingdao Shandong P. R. China
| | - Qiang Jia
- State Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology 53, Zhengzhou Rd. Qingdao Shandong P. R. China
| | - Kun‐Peng Wang
- State Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology 53, Zhengzhou Rd. Qingdao Shandong P. R. China
| | - Li‐Hua Gan
- School of Chemistry and Chemical EngineeringSouthwest University, Beibei Chongqing 400715 China
| | - Zhi‐Qiang Hu
- State Key Laboratory Base of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology 53, Zhengzhou Rd. Qingdao Shandong P. R. China
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25
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Bao H, Zhou B, Jin H, Liu Y. Diboron-Assisted Copper-Catalyzed Z-Selective Semihydrogenation of Alkynes Using Ethanol as a Hydrogen Donor. J Org Chem 2019; 84:3579-3589. [DOI: 10.1021/acs.joc.9b00321] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Hanyang Bao
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Bingwei Zhou
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Hongwei Jin
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Yunkui Liu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
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26
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Církva V, Jakubík P, Strašák T, Hrbáč J, Sýkora J, Císařová I, Vacek J, Žádný J, Storch J. Preparation and Physicochemical Properties of [6]Helicenes Fluorinated at Terminal Rings. J Org Chem 2019; 84:1980-1993. [PMID: 30681334 DOI: 10.1021/acs.joc.8b02870] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first racemization-stable helicene derivatives fluorinated at terminal rings, 1,2,3,4-tetrafluoro[6]helicene (6) and 1,2,3,4,13,14,15,16-octafluoro[6]helicene (15), were synthesized via the Wittig reaction followed by oxidative photocyclization in an overall yield of 41% of 6 and 76% of 15. The changed electronic structure in fluorinated helicenes was reflected in a slight shift of UV-vis absorption, fluorescence excitation, and emission spectra maxima when compared to unsubstituted [6]helicene. Cyclic voltammetry revealed a moderate decrease in the HOMO-LUMO gap with increasing fluorination. The specific rotation of tetrafluoro[6]helicene 6 enantiomers was found to be approximately 25% lower than that of unsubstituted [6]helicene. The theoretical study of the racemization barrier suggested a reasonable shift toward higher energy with increasing fluorination. The increasing fluorination also significantly affected the intermolecular interactions in the crystal lattice. The observed CH···F interactions led to the formation of 1D-molecular chains in the crystal structures of both fluorinated helicenes.
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Affiliation(s)
| | | | | | - Jan Hrbáč
- Institute of Chemistry , Masaryk University , Kamenice 5 , 625 00 Brno , Czech Republic
| | | | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science , Charles University in Prague , Hlavova 2030 , 128 40 Prague 2 , Czech Republic
| | - Jan Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry , Palacký University , Hněvotínská 3 , 775 15 Olomouc , Czech Republic
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27
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Yang Q, Ouyang K, Xi Z. Synthesis of chrysenosiloles via Mallory photocyclization. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.10.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Jiang YT, Yu ZZ, Zhang YK, Wang B. N-Bromosuccinimide-Induced C-H Bond Functionalization: An Intramolecular Cycloaromatization of Electron Withdrawing Group Substituted 1-Biphenyl-2-ylethanone for the Synthesis of 10-Phenanthrenol. Org Lett 2018; 20:3728-3731. [PMID: 29923730 DOI: 10.1021/acs.orglett.8b01160] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An NBS-induced intramolecular cycloaromatization for the synthesis of 10-phenanthrenols from electron-withdrawing group substituted 1-biphenyl-2-ylethanones is described. The in situ generated bromide was designed to act as an initiator for the radical C-H bond activation. An oxidative cross-dehydrogenative coupling reaction of a highly active C-H bond with an inert C-H bond readily occurs under mild conditions without the need for transition metals or strong oxidants.
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Affiliation(s)
- Ya-Ting Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Zhen-Zhen Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Ya-Kai Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Bin Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
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29
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Shi YG, Mellerup SK, Yuan K, Hu GF, Sauriol F, Peng T, Wang N, Chen P, Wang S. Stabilising fleeting intermediates of stilbene photocyclization with amino-borane functionalisation: the rare isolation of persistent dihydrophenanthrenes and their [1,5] H-shift isomers. Chem Sci 2018; 9:3844-3855. [PMID: 29887983 PMCID: PMC5946680 DOI: 10.1039/c8sc00560e] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 03/26/2018] [Indexed: 11/21/2022] Open
Abstract
Amino-borane functionalization is the key for isolating rare air-stable dihydrophenanthrene intermediates in stilbene photocyclization.
The key intermediate, 4a,4b-dihydrophenanthrene (DPH), involved in the photocyclization of stilbene and derivatives is known to be unstable, and is therefore poorly characterized/understood. We have found that functionalising stilbenes with NMe2 and BMes2 groups can greatly enhance the stability of 4a,4b-DPHs, allowing quantitative isolation and full characterization of these rare species. Furthermore, we discovered that the new amino-borane decorated 4a,4b-DPHs can undergo thermal [1,5] H sigmatropic shift, forming isomers 4a,10a-DPHs. Both 4a,4b-DHPs and 4a,10a-DHPs are stable towards air and moisture, while only the former were found to undergo oxidative dehydrogenation upon irradiation at 365 nm under air, yielding brightly blue/green fluorescent NMe2 and BMes2 functionalised phenanthrene analogues. Control studies established that the trans-Mes2B–Ph–NMe2 unit is responsible for the stability of these isolated 4a,4b-DHPs and their [1,5]-H shift isomers.
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Affiliation(s)
- Yong-Gang Shi
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Soren K Mellerup
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada .
| | - Kang Yuan
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada .
| | - Guo-Fei Hu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Francoise Sauriol
- Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada .
| | - Tai Peng
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Nan Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Pangkuan Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China
| | - Suning Wang
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials , School of Chemistry , Beijing Institute of Technology , Beijing 100081 , P. R. China.,Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada .
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30
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Wang CY, Pan GH, Chen F, Li JH. Oxidative cyclization of 2-allenyl-1,1'-biphenyls with α-carbonyl alkyl bromides: facile access to functionalized phenanthrenes. Chem Commun (Camb) 2018; 53:4730-4733. [PMID: 28405640 DOI: 10.1039/c7cc00483d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new copper-facilitated oxidative cyclization of 2-allenyl-1,1'-biphenyls with α-carbonyl alkyl bromides for producing functionalized phenanthrenes is presented, which represents the first allene 2,3-dicarbofunctionalization triggered by oxidative radical-medicated C3-addition of the terminal allene moiety and C-Br/C-H functionalization.
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Affiliation(s)
- Cheng-Yong Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
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31
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Matsushima T, Kikkawa S, Azumaya I, Watanabe S. Triple Helicene Cage: Three-Dimensional π-Conjugated Chiral Cage with Six [5]Helicene Units. ChemistryOpen 2018; 7:278-281. [PMID: 29657913 PMCID: PMC5891663 DOI: 10.1002/open.201800006] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Indexed: 01/01/2023] Open
Abstract
A three-dimensional π-conjugated chiral cage with six [5]helicene units (a triple helicene cage) was synthesized for the first time. Taking advantage of the Yamamoto coupling reaction, the triflate-substituted triple [5]helicene, a strained and preorganized precursor, was dimerized to afford the target compound. Single-crystal X-ray diffraction analysis revealed the unique structural features of the triple helicene cage: a cage-shaped rigid structure with outer helical grooves and an inner chiral cavity. All-P and all-M enantiomers were separated successfully by HPLC over a chiral column and their chiroptical properties were characterized by circular dichroism spectra.
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Affiliation(s)
- Tomoya Matsushima
- Department of Biomolecular Science, Faculty of Science and Research Center for, Materials with Integrated Properties Toho University Miyama 2-2-1, Funabashi Chiba 274-8510 Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences Toho University Miyama 2-2-1, Funabashi Chiba 274-8510 Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences Toho University Miyama 2-2-1, Funabashi Chiba 274-8510 Japan
| | - Soichiro Watanabe
- Department of Biomolecular Science, Faculty of Science and Research Center for, Materials with Integrated Properties Toho University Miyama 2-2-1, Funabashi Chiba 274-8510 Japan
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32
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Yu X, Tang J, Jin X, Yamamoto Y, Bao M. Manganese-Catalyzed C−H Cyanation of Arenes with N
-Cyano-N-(
4-methoxy)phenyl-p
-toluenesulfonamide. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201700628] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Xiaoqiang Yu
- State Key Laboratory of Fine Chemicals; Dalian Universi ty of Technology; Dalian 116023 China
| | - Jingjing Tang
- State Key Laboratory of Fine Chemicals; Dalian Universi ty of Technology; Dalian 116023 China
| | - Xinxin Jin
- State Key Laboratory of Fine Chemicals; Dalian Universi ty of Technology; Dalian 116023 China
| | - Yoshinori Yamamoto
- State Key Laboratory of Fine Chemicals; Dalian Universi ty of Technology; Dalian 116023 China
- WPI-AIMR (WPI-Advanced Institute for Materials Research); Tohoku University; Sendai 980-8577 Japan
| | - Ming Bao
- State Key Laboratory of Fine Chemicals; Dalian Universi ty of Technology; Dalian 116023 China
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33
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Sha HK, Xu T, Liu F, Tang BZ, Hao WJ, Tu SJ, Jiang B. Metal-free naphthannulation reactions of yne-allenone esters for accessing polycyclic aromatic hydrocarbons. Chem Commun (Camb) 2018; 54:10415-10418. [DOI: 10.1039/c8cc05018j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first metal-free base-promoted naphthannulation reactions of yne-allenone esters were developed for the direct assembly of a wide range of polycyclic aromatic hydrocarbons with generally good yields.
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Affiliation(s)
- Hong-Kai Sha
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Ting Xu
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Feng Liu
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Bu-Zheng Tang
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science
- Jiangsu Normal University
- Xuzhou
- P. R. China
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Fuchibe K, Shigeno K, Zhao N, Aihara H, Akisaka R, Morikawa T, Fujita T, Yamakawa K, Shimada T, Ichikawa J. Pinpoint-fluorinated polycyclic aromatic hydrocarbons (F-PAHs): Syntheses of difluorinated subfamily and their properties. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.09.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hackfort T, Neumann B, Stammler HG, Kuck D. A cyclopenta[hi]acephenanthrylene bearing two benzoannelated [3.3.3]propellane units: extension of triptindane chemistry. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The McMurry reaction of triptindan-9-one (2), a three-fold benzoannelated Cs-symmetrical [3.3.3]propellane ketone, gave trans-9,9′-bitriptindanylidene (5), a sterically crowded stilbene hydrocarbon bearing two E-oriented triptindane moieties, in good yield. Photoisomerization of 5 generated the corresponding cis-stilbene 8 in a photostationary E:Z mixture (55:45), which adopts a similarly crowded C2-symmetrical conformation that is apparently static on the NMR timescale. Photocyclodehydrogenation of 5 via 8 in benzene solution afforded the title hydrocarbon 6, a 1,2,9,10-tetrahydrocyclopenta[hi]acephenanthrylene merged with two triptindane units, in 85% yield. X-ray structure analysis of 6 revealed an essentially planar phenanthrene unit but significant steric repulsion between the pairs of opposite methylene groups of the [3.3.3]propellane cores, giving rise to a C2-symmetrical conformation. Reaction of 2 under modified McMurry conditions (DME instead of THF as a solvent) gave the saturated dimer, 9,9′-bitriptindanyl 7, as a mixture of diastereomers. Attempts to synthesize “columnene” (4), an elusive barrelene derivative fused with two triptindane caps, by three-fold McMurry reaction of triptindane-9,10,11-trione (3) failed.
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Affiliation(s)
- Thorsten Hackfort
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Beate Neumann
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Hans-Georg Stammler
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Dietmar Kuck
- Department of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
- Center of Molecular Materials (CM2), Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
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