1
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Praveen Kumar V, Athira CS, Mohan B, Priya S, Sasidhar BS. A selective photoinduced radical O-alkenylation of phenols and naphthols with terminal alkynes. Chem Commun (Camb) 2024; 60:9813-9816. [PMID: 39163125 DOI: 10.1039/d4cc02555e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2024]
Abstract
The visible light-promoted O-alkenylation of phenols and naphthols with terminal alkynes is achieved using 2,4,6-tris(4-fluorophenyl)pyrylium tetrafluoroborate (T(p-F)PPT) as a photocatalyst at room temperature without the need of any external ligand or additive. Apart from its excellent functional group tolerance, the protocol described herein represents an appealing alternative strategy to classical transition-metal catalysed hydroarylation reactions. Mechanistic investigations revealed that the reaction involves a radical pathway. The utility of the hydroarylated products for the synthesis of fused benzofurans via a one-pot annulation was also demonstrated. Herein, we report the first intermolecular radical hydroarylation of alkynes.
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Affiliation(s)
- V Praveen Kumar
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, Kerala, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - C S Athira
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, Kerala, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - B Mohan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, Kerala, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - S Priya
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Agro-processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, Kerala, India
| | - B S Sasidhar
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, Kerala, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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2
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Li T, Wei L, Wang Z, Zhang X, Yang J, Wei Y, Li P, Xu L. Vinylcyclopropane-Cyclopentene (VCP-CP) Rearrangement Enabled by Pyridine-Assisted Boronyl Radical Catalysis. Org Lett 2024; 26:5341-5346. [PMID: 38875468 DOI: 10.1021/acs.orglett.4c01724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2024]
Abstract
An unprecedented VCP-CP (vinylcyclopropane-cyclopentene) rearrangement approach has been established herein by virtue of the pyridine-boronyl radical catalyzed intramolecular ring expansions. This metal-free radical pathway harnesses readily available catalysts and unactivated vinylcyclopropane starting materials, providing an array of cyclopentene derivatives chemoselectively under relatively mild conditions. Mechanistic studies support the idea that the boronyl radical engages in the generation of allylic/ketyl radical species, thus inducing the ring opening of cyclopropanes and the following intramolecular cyclization processes.
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Affiliation(s)
- Ting Li
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Lanfeng Wei
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
- Xinjiang Key Laboratory of Coal Mine Disasters Intelligent Prevention and Emergency Response, Xinjiang Institute of Engineering, Urumqi 830023, China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Xinyu Zhang
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Jinbo Yang
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Yu Wei
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China
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3
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Nachimuthu K, Nallasivam JL. Recent updates on vinyl cyclopropanes, aziridines and oxiranes: access to heterocyclic scaffolds. Org Biomol Chem 2024; 22:4212-4242. [PMID: 38738483 DOI: 10.1039/d4ob00246f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
This present review delineates the repertoire of vinyl cyclopropanes and their stuctural analogues to accomplish a wide array of oxa-cycles, aza-cycles, and thia-cycles under transition metal catalysis and metal-free approaches from early 2019 to the present date. The generation of electrophilic π-allyl intermediates and 1-3/1-5-dipolarophile chemistry originating from VCPs are always green, step- and atom-economical and sustainable strategies in comparsion with prefunctionalized and/or C-H activation protocols. Here, the strained ring-system extends its applicability by relieving the strain to undergo a ring-expansion reaction to accomplish 5-9 membered carbo- and heterocyclic systems. The availability of chiral ligands in the ring-expansion reaction of VCPs and their analogues has paved the way to realizing asymmetric synthetic transformations.
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Affiliation(s)
- Kiruthika Nachimuthu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tiruchirappalli-620 015, Tamil Nadu, India.
| | - Jothi Lakshmi Nallasivam
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, Tiruchirappalli-620 015, Tamil Nadu, India.
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4
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Terada M, Yazaki R, Obayashi R, Iwasaki Z, Umemiya S, Kikuchi J. Consecutive π-Lewis acidic metal-catalysed cyclisation/photochemical radical addition promoted by in situ generated 2-benzopyrylium as the photoredox catalyst. Chem Sci 2024; 15:6115-6121. [PMID: 38665511 PMCID: PMC11041276 DOI: 10.1039/d4sc00808a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/18/2024] [Indexed: 04/28/2024] Open
Abstract
A π-Lewis acidic metal-catalysed cyclisation/photochemical radical addition sequence was developed, which utilises in situ generated 2-benzopyrylium cation intermediates as photoredox catalysts and electrophilic substrates to form 1H-isochromene derivatives in good yields in most cases. The key 2-benzopyrylium intermediates were generated through the activation of the alkyne moiety of ortho-carbonyl alkynylbenzene derivatives by such π-Lewis acidic metal catalysts as AgNTf2 and Cu(NTf2)2, and the subsequent intramolecular cyclisation and proto-demetalation using trifluoroacetic acid. Further photo-excitation of the 2-benzopyrylium intermediates facilitated single-electron transfer from a benzyltrimethylsilane derivative as a donor molecule to promote the radical addition of arylmethyl radicals to the 2-benzopyrylium intermediates.
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Affiliation(s)
- Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Ryohei Yazaki
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Ren Obayashi
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Zen Iwasaki
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Shigenobu Umemiya
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
| | - Jun Kikuchi
- Department of Chemistry, Graduate School of Science, Tohoku University Aoba-ku Sendai Miyagi 980-8578 Japan
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5
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Chandu P, Biswas S, Pal K, Sureshkumar D. Organophotoredox Catalysis: Switchable Radical Generation from Alkyl Sodium Sulfinates for Sulfonylation and Alkylative Activation of C-C Bonds of Cyclopropenes. J Org Chem 2024; 89:3912-3925. [PMID: 38446801 DOI: 10.1021/acs.joc.3c02743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Generating alkyl radicals from the sulfonyl radicals remains challenging in synthetic chemistry. Here, we report an efficient photocatalyzed strategy using alkyl sodium sulfinates as both sulfonylating and alkylating reagents by controlling the reaction temperature. This methodology provides a versatile protocol for synthesizing diastereoselective sulfonylated cyclopropanes and poly-substituted styrene derivatives. This methodology is successfully demonstrated with a wide variety of cyclopropenes and alkyl sulfinates, showcasing its broad substrate scope, high diastereo- and E/Z selectivity, and yielding good to excellent yields.
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Affiliation(s)
- Palasetty Chandu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India
| | - Sourabh Biswas
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India
| | - Koustav Pal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741246, India
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6
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Chandu P, Mallick M, Srinivasu V, Sureshkumar D. Organophotocatalyzed Alkyl/Arylsulfonylation of Vinylcyclopropanes. Chemistry 2024; 30:e202303187. [PMID: 37926681 DOI: 10.1002/chem.202303187] [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: 09/29/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 11/07/2023]
Abstract
Allyl sulfones are an essential pharmacophore in many bioactive compounds. To combat their synthetic barrier, we report a practical, straightforward organophotocatalyzed methodology for accessing miscellaneously functionalized allyl sulfone derivatives using inexpensive and bench-stable sodium sulfinate salts under mild conditions. This photo-catalyzed radical sulfonylation provides access to a variety of allyl sulfones in good to excellent yields with high E : Z selectivity. A wide range of vinyl cyclopropanes, as well as aryl/hetero and alkyl sodium sulfinates, were tolerated and reliable in gram-scale synthesis. Later on, further functionalization of allyl sulfones was demonstrated. A plausible mechanism for radical sulfonylation is proposed from the control experiments.
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Affiliation(s)
- Palasetty Chandu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India
| | - Manasi Mallick
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India
| | - Vinjamuri Srinivasu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, India
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7
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Lin D, Coe M, Krishnamurti V, Ispizua-Rodriguez X, Surya Prakash GK. Recent Advances in Visible Light-Mediated Radical Fluoro-alkylation, -alkoxylation, -alkylthiolation, -alkylselenolation, and -alkylamination. CHEM REC 2023; 23:e202300104. [PMID: 37212421 DOI: 10.1002/tcr.202300104] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/20/2023] [Indexed: 05/23/2023]
Abstract
In the last few years, many reagents and protocols have been developed to allow for the efficient fluorofunctionalization of a diverse set of scaffolds ranging from alkanes, alkenes, alkynes, and (hetero)arenes. The concomitant rise of organofluorine chemistry and visible light-mediated synthesis have synergistically expanded the fields and have mutually benefitted from developments in both fields. In this context, visible light driven formations of radicals containing fluorine have been a major focus for the discovery of new bioactive compounds. This review details the recent advances and progress made in visible light-mediated fluoroalkylation and heteroatom centered radical generation.
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Affiliation(s)
- Daniel Lin
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Matthew Coe
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Vinayak Krishnamurti
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - Xanath Ispizua-Rodriguez
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
| | - G K Surya Prakash
- Loker Hydrocarbon Research Institute Department of Chemistry, University of Southern California, 837 Bloom Walk, 90089-1661, Los Angeles, CA, USA
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8
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Wu B, Ding QJ, Wang ZL, Zhu R. Alkyne Polymers from Stable Butatriene Homologues: Controlled Radical Polymerization of Vinylidenecyclopropanes. J Am Chem Soc 2023; 145:2045-2051. [PMID: 36688814 DOI: 10.1021/jacs.2c12220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Controlled polymerization of cumulenic monomers represents a promising yet underdeveloped strategy toward well-defined alkyne polymers. Here we report a stereoelectronic effect-inspired approach using simple vinylidenecyclopropanes (VDCPs) as butatriene homologues in controlled radical ring-opening polymerizations. While being thermally stable, VDCPs mimic butatrienes via conjugation of the cyclopropane ring. This leads to exclusive terminal-selective propagation that affords a highly structurally regular alkyne-based backbone, featuring complete ring-opening and no backbiting regardless of polymerization conditions.
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Affiliation(s)
- Bin Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Qian-Jun Ding
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zheng-Lin Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Rong Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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9
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Chandu P, Das D, Ghosh KG, Sureshkumar D. Visible‐Light Photoredox Catalyzed Decarboxylative Alkylation of Vinylcyclopropanes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Palasetty Chandu
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur West Bengal 741246 India
| | - Debabrata Das
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur West Bengal 741246 India
| | - Krishna G. Ghosh
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur West Bengal 741246 India
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur West Bengal 741246 India
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10
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Li P, Yang X, Liu J, Zhang Y, Wang L, Gao Y. Photo‐driven Radical Addition/Cyclization of Biaryl Vinyl Ketones with CF3SO2Na and ArCF2CO2K without an External Photocatalyst. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pinhua Li
- Huaibei Normal University Department of Chemistry Dongshan Road 235000 Huaibei CHINA
| | - Xingyu Yang
- Huaibei Normal University Department of Chemistry Huaibei CHINA
| | - Jie Liu
- Huaibei Normal University Department of Chemistry Huaibei CHINA
| | - Yicheng Zhang
- Huaibei Normal University Department of Chemistry Huaibei CHINA
| | - Lei Wang
- Huaibei Normal University Department of Chemistry Huaibei CHINA
| | - Yanhui Gao
- Huaibei Normal University Department of chemistry CHINA
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11
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Bao L, Cheng JT, Wang ZX, Chen XY. Pyrylium salts acting as both energy transfer and electron transfer photocatalysts for E → Z isomerization of activated alkenes and cyclization of cinnamic or biaryl carboxylic acids. Org Chem Front 2022. [DOI: 10.1039/d1qo01623g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Here we report that 2,4,6-triarylpyrylium salts could perform both energy transfer and electron transfer photocatalysis modes for E → Z isomerization of activated alkenes and cyclization of cinnamic or biaryl carboxylic acids.
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Affiliation(s)
- Lei Bao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jin-Tang Cheng
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiang-Yu Chen
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
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12
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Sivanandan ST, Bharath Krishna R, Baiju TV, Mohan C. Visible‐Light‐Mediated Ring‐Opening Reactions of Cyclopropanes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100986] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | - R. Bharath Krishna
- Institute for Integrated Programmes and Research in Basic Sciences Mahatma Gandhi University Kottayam 686560 India
| | - Thekke V. Baiju
- Department of chemistry Indian Institute of Technology Bombay Mumbai 400076 India
| | - Chithra Mohan
- School of Chemical Sciences Mahatma Gandhi University Kottayam 686560 India
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13
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Feng FF, Ma JA, Cahard D. Radical 1,5-Chloropentafluorosulfanylation of Unactivated Vinylcyclopropanes and Transformation into α-SF 5 Ketones. J Org Chem 2021; 86:13808-13816. [PMID: 34514785 DOI: 10.1021/acs.joc.1c01886] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The radical 1,5-chloropentafluorosulfanylation of vinyl cyclopropanes (VCPs) initiated by Et3B/O2 affords allylic pentafluorosulfanyl/homoallylic chloride products through the ring-strain release of the cyclopropane. The VCP substitution pattern was investigated. The utility of this reaction was illustrated in post-transformation of the C═C bond by ozonolysis, giving access to valuable α-SF5 carbonyl compounds.
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Affiliation(s)
- Fang-Fang Feng
- UMR 6014 CNRS COBRA, Normandie Université, INSA Rouen, 1 rue Tesnière, Mont Saint Aignan 76821, France.,Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Jun-An Ma
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Dominique Cahard
- UMR 6014 CNRS COBRA, Normandie Université, INSA Rouen, 1 rue Tesnière, Mont Saint Aignan 76821, France
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14
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Hola E, Ortyl J. Pyrylium salt as a visible-light-induced photoredox catalyst for polymer and organic synthesis – Perspectives on catalyst design and performance. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110365] [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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15
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Pokhriyal A, Singh Karki B, Kant R, Rastogi N. Redox-Neutral 1,3-Dipolar Cycloaddition of 2 H-Azirines with 2,4,6-Triarylpyrylium Salts under Visible Light Irradiation. J Org Chem 2021; 86:4661-4670. [PMID: 33677969 DOI: 10.1021/acs.joc.1c00082] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A novel visible light mediated redox-neutral 1,3-dipolar cycloaddition of 2H-azirines with 2,4,6-triarylpyrylium tetrafluoroborate salts providing tetrasubstituted pyrroles has been developed. The 2,4,6-triarylpyrylium salt acts as dipolarophile as well as photosensitizer in the reaction, under blue light irradiation. The control experiments indicated single electron oxidation of 2H-azirines by photoexcited pyrylium salts, followed by coupling between an azaallenyl radical cation and triarylpyranyl radical as the key mechanistic feature. The mild conditions, wide substrate scope, and complete regioselectivity are the noticeable attributes of the reaction.
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Affiliation(s)
| | - Bhupal Singh Karki
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | | | - Namrata Rastogi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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16
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Sambiagio C, Ferrari M, van Beurden K, Ca’ ND, van Schijndel J, Noël T. Continuous-Flow Synthesis of Pyrylium Tetrafluoroborates: Application to Synthesis of Katritzky Salts and Photoinduced Cationic RAFT Polymerization. Org Lett 2021; 23:2042-2047. [PMID: 33650879 PMCID: PMC8041383 DOI: 10.1021/acs.orglett.1c00178] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Indexed: 11/29/2022]
Abstract
Katritzky salts have emerged as effective alkyl radical sources upon metal- or photocatalysis. These are typically prepared from the corresponding triarylpyrylium ions, in turn an important class of photocatalysts for small molecules synthesis and photopolymerization. Here, a flow method for the rapid synthesis of both pyrylium and Katrizky salts in a telescoped fashion is reported. Moreover, several pyrylium salts were tested in the photoinduced RAFT polymerization of vinyl ethers under flow and batch conditions.
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Affiliation(s)
- Carlo Sambiagio
- Department
of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic
Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
| | - Matteo Ferrari
- Department
of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic
Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
- Department
of Chemistry, Life Sciences and Environmental Sustainability (SCVSA), University of Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Koen van Beurden
- Research
Group Biopolymers/Green Chemistry, Avans
University of Applied Science, 4818 CR Breda, The Netherlands
| | - Nicola della Ca’
- Department
of Chemistry, Life Sciences and Environmental Sustainability (SCVSA), University of Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Jack van Schijndel
- Research
Group Biopolymers/Green Chemistry, Avans
University of Applied Science, 4818 CR Breda, The Netherlands
| | - Timothy Noël
- Department
of Chemical Engineering and Chemistry, Micro Flow Chemistry and Synthetic
Methodology, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
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17
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Sun B, Huang P, Yan Z, Shi X, Tang X, Yang J, Jin C. Self-Catalyzed Phototandem Perfluoroalkylation/Cyclization of Unactivated Alkenes: Synthesis of Perfluoroalkyl-Substituted Quinazolinones. Org Lett 2021; 23:1026-1031. [PMID: 33464096 DOI: 10.1021/acs.orglett.0c04225] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A novel visible-light-induced radical tandem trifluoromethylation/cyclization of unactivated alkenes with sodium perfluoroalkanesulfinates (Rf = CF3, C3F7, C4F9, C6F13, C8F17) under air atmosphere has been developed. A range of quinazolinones containing unactivated alkene moiety and sodium perfluoroalkanesulfinates were compatible with this transformation, leading to a variety of perfluoroalkyl-substituted quinazoline alkaloids. Remarkably, the experiment can be carried out without any metal catalyst, strong oxidant, or external photosensitizer.
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Affiliation(s)
- Bin Sun
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Panyi Huang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Zhiyang Yan
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Xiayue Shi
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Xiaoli Tang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Jin Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
| | - Can Jin
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P.R. China.,College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P.R. China
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18
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Propagation chains in photocatalyzed radical nucleophilic substitutions of thiolates with perfluoroalkyl groups. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Barthelemy AL, Bourdreux F, Dagousset G, Magnier E. Photoredox-Catalyzed Selective Synthesis of Allylic Perfluoroalkanes from Alkenes. Chemistry 2020; 26:10213-10216. [PMID: 32343860 DOI: 10.1002/chem.202002046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Indexed: 12/22/2022]
Abstract
We report herein a novel photoredox-catalyzed synthesis of allylic trifluoromethanes. The use of sulfilimino iminium as a source of trifluoromethyl radicals proves crucial to achieving high selectivity. Importantly, both styrene derivatives and unactivated alkenes are for the first time suitable partners for this process. The mild reaction conditions are compatible with a variety of functional groups. Remarkably, this method is readily broadened to other perfluoroalkyl groups (RF =CFCl2 , CF2 Br, C4 F9 ). An extensive mechanistic study is also provided.
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Affiliation(s)
- Anne-Laure Barthelemy
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78000, Versailles, France
| | - F Bourdreux
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78000, Versailles, France
| | - Guillaume Dagousset
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78000, Versailles, France
| | - Emmanuel Magnier
- Institut Lavoisier de Versailles, Université Paris-Saclay, UVSQ, CNRS, UMR 8180, 78000, Versailles, France
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20
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Barata‐Vallejo S, Postigo A. New Visible‐Light‐Triggered Photocatalytic Trifluoromethylation Reactions of Carbon–Carbon Multiple Bonds and (Hetero)Aromatic Compounds. Chemistry 2020; 26:11065-11084. [DOI: 10.1002/chem.202000856] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/14/2020] [Indexed: 01/10/2023]
Affiliation(s)
- Sebastian Barata‐Vallejo
- Department of Organic ChemistryUniversidad de Buenos Aires, Facultad de Farmacia y Bioquímica Junin 954 CP 1113 Buenos Aires Argentina
- ISOFConsiglio Nazionale delle Ricerche Via P. Gobetti 101 40129 Bologna Italy
| | - Al Postigo
- Department of Organic ChemistryUniversidad de Buenos Aires, Facultad de Farmacia y Bioquímica Junin 954 CP 1113 Buenos Aires Argentina
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21
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Koike T. Frontiers in Radical Fluoromethylation by Visible‐Light Organic Photocatalysis. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000058] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Takashi Koike
- Laboratory for Chemistry and Life Science Institute of Innovative ResearchTokyo Institute of Technology R1-27, 4259 Nagatsuta-cho, Midori-ku Yokohama 226-8503 Japan
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22
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Li Z, Jiao L, Sun Y, He Z, Wei Z, Liao W. CF
3
SO
2
Na as a Bifunctional Reagent: Electrochemical Trifluoromethylation of Alkenes Accompanied by SO
2
Insertion to Access Trifluoromethylated Cyclic N‐Sulfonylimines. Angew Chem Int Ed Engl 2020; 59:7266-7270. [DOI: 10.1002/anie.202001262] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Zheng Li
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Lingcong Jiao
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Yunhai Sun
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Zeying He
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Zhonglin Wei
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Wei‐Wei Liao
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
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23
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Li Z, Jiao L, Sun Y, He Z, Wei Z, Liao W. CF
3
SO
2
Na as a Bifunctional Reagent: Electrochemical Trifluoromethylation of Alkenes Accompanied by SO
2
Insertion to Access Trifluoromethylated Cyclic N‐Sulfonylimines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001262] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zheng Li
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Lingcong Jiao
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Yunhai Sun
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Zeying He
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Zhonglin Wei
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
| | - Wei‐Wei Liao
- Department of Organic Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China
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24
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Liu J, Yao H, Li X, Wu H, Lin A, Yao H, Xu J, Xu S. Organocatalytic 1,5-trifluoromethylthio-sulfonylation of vinylcyclopropane mediated by visible light in the water phase. Org Chem Front 2020. [DOI: 10.1039/d0qo00343c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
1,2-Difunctionalization has developed into a robust tool for the preparation of complex organic molecules, and remote difunctionalization has also aroused widespread interest to achieve pluripotency of difunctionalization.
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Affiliation(s)
- Junkai Liu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Hong Yao
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Xinnan Li
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Hongyu Wu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Jinyi Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
| | - Shengtao Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
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25
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Yerien DE, Barata-Vallejo S, Mora Flores EW, Postigo A. The role of photocatalysts in radical chains in homolytic aromatic substitution, radical addition to olefins, and nucleophilic radical substitution mechanisms. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00921k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Initiation, propagation and chain termination steps in oxidative and reductive quenching cycles for the photoinitiated perfluoroalkylation reaction of an olefin.
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Affiliation(s)
- Damian E. Yerien
- Facultad de Farmacia y Bioquímica-Junín 954
- Universidad de Buenos Aires
- Buenos Aires
- Argentina
| | - Sebastián Barata-Vallejo
- Facultad de Farmacia y Bioquímica-Junín 954
- Universidad de Buenos Aires
- Buenos Aires
- Argentina
- Consiglio Nazionale delle Ricerche (CNR)
| | - Erwin W. Mora Flores
- Facultad de Farmacia y Bioquímica-Junín 954
- Universidad de Buenos Aires
- Buenos Aires
- Argentina
| | - Al Postigo
- Facultad de Farmacia y Bioquímica-Junín 954
- Universidad de Buenos Aires
- Buenos Aires
- Argentina
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26
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Gao F, Meng FX, Du JY, Zhang S, Huang HL. One-Step Synthesis of Trifluoroethylated Chromones via Radical Cascade Cyclization-Coupling of 2-(Allyloxy)arylaldehydes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Fei Gao
- Institute of Molecular Medicine; Renji Hospital, School of Medicine; Shanghai Jiao Tong University; 200127 Shanghai China
| | - Fan-Xiao Meng
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
| | - Ji-Yuan Du
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
| | - Shiyan Zhang
- Institute of Molecular Medicine; Renji Hospital, School of Medicine; Shanghai Jiao Tong University; 200127 Shanghai China
| | - Hong-Li Huang
- College of Chemistry and Chemical Engineering; Liaocheng University; 252059 Liaocheng Shandong China
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27
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Photoredox catalysed allylic trifluoromethylation via ring opening of vinyl cyclopropanes using Langlois reagent. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130641] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Zhang ZQ, Meng XY, Sheng J, Lan Q, Wang XS. Enantioselective Copper-Catalyzed 1,5-Cyanotrifluoromethylation of Vinylcyclopropanes. Org Lett 2019; 21:8256-8260. [DOI: 10.1021/acs.orglett.9b03012] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zi-Qi Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xiang-Yu Meng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Quan Lan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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