1
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Chen Z, Zhao S, Wang T, Xue F, Zhu C, Yue Y, Feng C. Electrooxidative 1,3-Oxo/Carboamination of Arylcyclopropanes. J Org Chem 2024; 89:12769-12774. [PMID: 39140316 DOI: 10.1021/acs.joc.4c01175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Herein, the work demonstrates an electrochemically paired electrolysis approach facilitating the efficient achievement of the electrooxidative 1,3-oxo/carboamination of arylcyclopropanes under mild conditions. The formation of 1,3-arylamination of arylcyclopropanes involves commercially available amine redox mediators through a radical-radical process. In addition, the successful execution of β-amino ketones also occurs under atmospheric conditions. The control experiments supported the existence of key benzylic radical intermediates in the reaction pathway.
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Affiliation(s)
- Ziyan Chen
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Shuaishuai Zhao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Tiantian Wang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Fei Xue
- Institute of Material Physics & Chemistry, College of Science, Nanjing Forestry University, Nanjing 210037, China
| | - Chuan Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yanni Yue
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering of Materials Science, Soochow University, Suzhou 215123, China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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2
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Tamtaji M, Kwon S, Musgrave CB, Goddard WA, Chen G. Reaction Mechanism of Rapid CO Electroreduction to Propylene and Cyclopropane (C 3+) over Triple Atom Catalysts. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38919050 DOI: 10.1021/acsami.4c06257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
The carbon monoxide reduction reaction (CORR) toward C2+ and C3+ products such as propylene and cyclopropane can not only reduce anthropogenic emissions of CO and CO2 but also produce value-added organic chemicals for polymer and pharmaceutical industries. Here, we introduce the concept of triple atom catalysts (TACs) that have three intrinsically strained and active metal centers for reducing CO to C3+ products. We applied grand canonical potential kinetics (GCP-K) to screen 12 transition metals (M) supported by nitrogen-doped graphene denoted as M3N7, where M stands for Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Ir, Pt, and Au. We sought catalysts with favorable CO binding, hydrogen binding, and C-C dimerization energetics, identifying Fe3N7 and Ir3N7 as the best candidates. We then studied the entire reaction mechanism from CO to C3H6 and C2H4 as a function of applied potential via, respectively, 12-electron and 8-electron transfer pathways on Fe3N7 and Ir3N7. Density functional theory (DFT) predicts an overpotential of 0.17 VRHE for Fe3N7 toward propylene and an overpotential of 0.42 VRHE toward cyclopropane at 298.15 K and pH = 7. Also, DFT predicts an overpotential of 0.15 VRHE for Ir3N7 toward ethylene. This work provides fundamental insights into the design of advanced catalysts for C2+ and C3+ synthesis at room temperature.
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Affiliation(s)
- Mohsen Tamtaji
- Hong Kong Quantum AI Lab Limited, Pak Shek Kok, Hong Kong SAR 999077, China
| | - Soonho Kwon
- Materials and Process Simulation Center (MSC), MC 139-74, California Institute of Technology, Pasadena, California 91125, United States
| | - Charles B Musgrave
- Materials and Process Simulation Center (MSC), MC 139-74, California Institute of Technology, Pasadena, California 91125, United States
| | - William A Goddard
- Materials and Process Simulation Center (MSC), MC 139-74, California Institute of Technology, Pasadena, California 91125, United States
| | - GuanHua Chen
- Hong Kong Quantum AI Lab Limited, Pak Shek Kok, Hong Kong SAR 999077, China
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China
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3
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Upreti GC, Singh T, Khanna K, Sahoo D, Singh A. Photocatalytic, α-Aminoalkyl Radical-Mediated, Methylene-Extrusive Ring-Closing Transformation of o-Alkynyl and o-Cyano Acrylamides. Org Lett 2024; 26:3652-3656. [PMID: 38656756 DOI: 10.1021/acs.orglett.4c01165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Herein we report a visible-light-induced, α-aminoalkyl radical-mediated cascade reaction of 1,7-enynes that establishes a unique ring-closing enyne transformation pathway which occurs with concomitant loss of a methylene moiety. The α-aminoalkyl radical derived from N,N-dimethylaniline was demonstrated to be a traceless promoter of enyne reorganization leading to 4-alkylquinolinones. The reaction can also be extended to nitrile-substituted acrylamide systems, leading to carbostyrils. Experiments with deuterated N,N-dimethylaniline-d6 (PhN(CD3)2) established the involvement of 1,5-H atom transfer in the mechanism.
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Affiliation(s)
- Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Tavinder Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Kirti Khanna
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Debasish Sahoo
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Anand Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
- Department of Sustainable Energy Engineering, Kotak School of Sustainability, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
- Chandrakanta Kesavan Center for Energy Policy and Climate Solutions, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
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4
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Mazzarella D, Bortolato T, Pelosi G, Dell'Amico L. Photocatalytic (3 + 2) dipolar cycloadditions of aziridines driven by visible-light. Chem Sci 2023; 15:271-277. [PMID: 38131079 PMCID: PMC10732004 DOI: 10.1039/d3sc05997a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023] Open
Abstract
Herein, we document the design and development of a novel (3 + 2) cycloaddition reaction aided by the activity of an organic photocatalyst and visible light. The process is extremely fast, taking place in a few minutes, with virtually complete atom economy. A large variety of structurally diverse aziridines were used as masked ylides in the presence of different types of dipolarophiles (28 examples with up to 94% yield and >95 : 5 dr). Mechanistic insights obtained from photophysical, electrochemical and experimental studies highlight that the chemistry is driven by the in situ generation of the reactive ylide through two consecutive electron-transfer processes. We also report an aerobic cascade process, where an additional oxidation step grants access to a vast array of pyrrole derivatives (19 examples with up to 95% yield). Interestingly, the extended aromatic core exhibits a distinctive absorption and emission profile, which can be easily used to tag the effectiveness of this covalent linkage.
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Affiliation(s)
- Daniele Mazzarella
- Department of Chemical Sciences, University of Padova Via Francesco Marzolo 1 35131 Padova Italy
| | - Tommaso Bortolato
- Department of Chemical Sciences, University of Padova Via Francesco Marzolo 1 35131 Padova Italy
| | - Giorgio Pelosi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma Parco Area delle Scienze 17 43124 Parma Italy
| | - Luca Dell'Amico
- Department of Chemical Sciences, University of Padova Via Francesco Marzolo 1 35131 Padova Italy
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5
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Xu Y, Gao HX, Pan C, Shi Y, Zhang C, Huang G, Feng C. Stereoselective Photoredox Catalyzed (3+3) Dipolar Cycloaddition of Nitrone with Aryl Cyclopropane. Angew Chem Int Ed Engl 2023; 62:e202310671. [PMID: 37700683 DOI: 10.1002/anie.202310671] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/14/2023]
Abstract
By resorting to the principle of remote activation, we herein demonstrate the first photoredox catalyzed (3+3) dipolar cycloaddition of nitrones with aryl cyclopropanes. Key to the fidelity of the reaction resides in a facile manner of substrate activation by single-electron transfer (SET) oxidation with photoredox catalysis, and the reaction takes place through a stepwise cascade encompassing a three-electron-type nucleophilic substitution triggered cyclopropane ring-opening and a diastereoselective 6-endo-trig radical cyclization manifold. The reaction proceeds under mild conditions with excellent regio- and stereoselectivity, nicely complementing the well-developed Lewis acid catalyzed cycloaddition of donor-acceptor cyclopropanes. Other merits of the protocol include wide scope of aryl cyclopropanes with diversified substitution patterns and good functional-group compatibility. A mechanism involving an aryl radical cation promoted remote activation mode was also proposed and supported by mechanistic experiments.
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Affiliation(s)
- Yao Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Hai-Xiang Gao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Chengkai Pan
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yue Shi
- Department of chemistry, School of science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin, 300072, P. R. China
| | - Chi Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Genping Huang
- Department of chemistry, School of science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin, 300072, P. R. China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
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6
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Yue Y, Song Y, Zhao S, Zhang C, Zhu C, Feng C. Electrooxidative Fluorofunctionalization of Arylcyclopropanes. Org Lett 2023; 25:7385-7389. [PMID: 37769018 DOI: 10.1021/acs.orglett.3c02843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
The work herein demonstrates the viability of an electrochemical oxidative protocol for the expedient realization of 1,3-fluorofunctionalization of arylcyclopropanes under catalyst- and oxidant-free conditions. Given the relatively low nucleophilicity of fluoride ion, the counterintuitive outcome that the ring-opening is initiated by nucleophilic fluorination is rationalized by invoking tight ion pair between aryl radical cation and BF4- counterion. By integrating alcohols, acids, and N-heterocycles as the terminating nucleophiles, straightforward 1,3-fluorooxygenation and 1,3-fluoroamination are smoothly achieved.
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Affiliation(s)
- Yanni Yue
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering of Materials Science, Soochow University, Suzhou 215123, China
| | - Yang Song
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Shuaishuai Zhao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chi Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chuan Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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7
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Zhou W, Chen P, Li ZQ, Xiao LT, Bai J, Song XR, Luo MJ, Xiao Q. Electrochemical 1,3-Alkyloxylimidation of Arylcyclopropane Radical Cations: Four-Component Access to Imide Derivatives. Org Lett 2023; 25:6919-6924. [PMID: 37695045 DOI: 10.1021/acs.orglett.3c02744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Herein, a general electrochemical radical-cation-mediated four-component ring-opening 1,3-alkyloxylimidation of arylcyclopropanes, acetonitrile, carboxylic acids, and alcohols is described, providing a facile and sustainable approach to quickly construct structurally diverse imide derivatives from easily available raw materials in an operationally simple undivided cell. This metal-catalyst- and oxidant-free single-electron oxidation strategy offers a green alternative for the formation of highly reactive cyclopropane-derived radical cations, and this protocol features a broad functional group tolerance.
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Affiliation(s)
- Wei Zhou
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Peng Chen
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Zi-Qiong Li
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Li-Tong Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Jiang Bai
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Xian-Rong Song
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Mu-Jia Luo
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Qiang Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
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8
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Sheng W, Huang X, Cai J, Zheng Y, Wen Y, Song C, Li J. Electrochemical Oxidation Enables Regioselective 1,3-Hydroxyfunctionalization of Cyclopropanes. Org Lett 2023; 25:6178-6183. [PMID: 37584476 DOI: 10.1021/acs.orglett.3c02309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
The direct construction of 1,3-hydroxyfunctionalized molecules is still a significant challenge, as they can currently be obtained through multiple synthetic steps. Herein, we report a general and efficient 1,3-hydroxyfunctionalization of arylcyclopropanes by electrochemical oxidation with a strategic choice of nucleophiles and H2O. 1,3-Amino alcohols, 1,3-alkynyl alcohols, 1,3-hydroxyesters, and 1,3-halo alcohols are achieved with high levels of chemo- and regio-selectivity, opening a new dimension for 1,3-difunctionalization reaction.
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Affiliation(s)
- Wei Sheng
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Xuejin Huang
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jianhua Cai
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Ye Zheng
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Yuxi Wen
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Chunlan Song
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jiakun Li
- College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
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9
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Liao K, Chan CY, Liu S, Zhang X, Chen J, Huang Y. Photoredox Cleavage of a C sp3-C sp3 Bond in Aromatic Hydrocarbons. J Am Chem Soc 2023. [PMID: 37216226 DOI: 10.1021/jacs.3c02745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Functionalizing molecules through the selective cleavage of carbon-carbon bonds is an attractive approach in synthetic chemistry. Despite recent advances in both transition-metal catalysis and radical chemistry, the selective cleavage of inert Csp3-Csp3 bonds in hydrocarbon feedstocks remains challenging. Examples reported in the literature typically involve substrates containing redox functional groups or highly strained molecules. In this article, we present a straightforward protocol for the cleavage and functionalization of Csp3-Csp3 bonds in alkylbenzenes using photoredox catalysis. Our method employs two distinct bond scission pathways. For substrates with tertiary benzylic substituents, a carbocation-coupled electron transfer mechanism is prevalent. For substrates with primary or secondary benzylic substituents, a triple single-electron oxidation cascade is applicable. Our strategy offers a practical means of cleaving inert Csp3-Csp3 bonds in molecules without any heteroatoms, resulting in primary, secondary, tertiary, and benzylic radical species.
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Affiliation(s)
- Ke Liao
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Cho Ying Chan
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Siqi Liu
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518118, China
| | - Xinhao Zhang
- State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518118, China
| | - Jiean Chen
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518118, China
| | - Yong Huang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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10
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Ghosh S, Majumder S, Ghosh D, Hajra A. Redox-neutral carbon-heteroatom bond formation under photoredox catalysis. Chem Commun (Camb) 2023. [PMID: 37171250 DOI: 10.1039/d3cc01873c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Recently, visible-light-mediated photoredox catalysis has been emerging as one of the fastest growing fields in organic chemistry because of its low cost, easy availability and environmental benignness. In the past five years, a new yet challenging trend, visible-light-induced redox-neutral carbon-heteroatom bond formation reaction involving presumed radical intermediates, has been flourishing rapidly. Although mostly transition metal-based photoredox catalysts were reported, a few organophotoredox catalysts have also shown efficacy towards carbon-heteroatom bond formation reactions. This review intends to summarize the recent research progress in redox-neutral carbon-heteroatom bond formations based on active intermediate(s) involved under photoredox catalysis.
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Affiliation(s)
- Sumit Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Souvik Majumder
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
| | - Debashis Ghosh
- Department of Chemistry, St. Joseph's University, Bangalore 560027, Karnataka, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.
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11
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Zhao YR, Ma ZY, Liu L, Gao P, Duan XH, Hu M. Synthesis of α-Difluoromethylene Ethers via Photoredox-Induced Hyperconjugative Ring Opening of gem-Difluorocyclopropanes. J Org Chem 2023; 88:3787-3793. [PMID: 36827360 DOI: 10.1021/acs.joc.2c03062] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
Fluorinated compounds have found widespread applications in pharmaceuticals, agrochemicals, and materials science. Precise construction of α-difluoromethylene ether (CF2-O) moiety in organic molecules is of high demand. Herein, a visible light-promoted reaction protocol for the synthesis of α-difluoromethylene ether from gem-difluorocyclopropane is described. The key ring-opening step is induced by hyperconjugative interaction of cyclopropane with photo-oxidized aromatic rings. This reaction is easy scale-up, and the products bearing a synthetic handle enable their further manipulation.
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Affiliation(s)
- Yu-Rou Zhao
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhi-Yong Ma
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Le Liu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Pin Gao
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Xin-Hua Duan
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China
| | - Mingyou Hu
- School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Xi'an Jiaotong University, Xi'an 710049, China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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12
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Chen K, Li ZQ, Zhu C, Feng C. Ring-opening 1,3-difunctionalization of aryl cyclopropanes. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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