1
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Yao J, Yang R, Liu C, Zhao BH, Zhang B, Wu Y. Alkynes Electrooxidation to α,α-Dichloroketones in Seawater with Natural Chlorine Participation via Competitive Reaction Inhibition and Tip-Enhanced Reagent Concentration. ACS CENTRAL SCIENCE 2024; 10:155-162. [PMID: 38292614 PMCID: PMC10823507 DOI: 10.1021/acscentsci.3c01277] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/19/2023] [Accepted: 12/01/2023] [Indexed: 02/01/2024]
Abstract
The traditional synthesis of α,α-dichloroketones usually requires corrosive chlorine, harsh reaction conditions, or excessive electrolytes. Here, we report an electrooxidation strategy of ethynylbenzenes to α,α-dichloroketones by directly utilizing seawater as the chlorine source and electrolyte solution without an additional supporting electrolyte. High-curvature NiCo2O4 nanocones are designed to inhibit competitive O2 and Cl2 evolution reactions and concentrate Cl- and OH- ions, accelerating α,α-dichloroketone electrosynthesis. NiCo2O4 nanocones produce 81% yield, 61% Faradaic efficiency, and 44.2 mmol gcat.-1 h-1 yield rate of α,α-dichloroketones, outperforming NiCo2O4 nanosheets. A Cl• radical triggered Cl• and OH• radical addition mechanism is revealed by a variety of radical-trapping and control experiments. The feasibility of a solar-powered electrosynthesis system, methodological universality, and extended synthesis of α,α-dichloroketone-drug blocks confirm its practical potential. This work may provide a sustainable solution to the electrocatalytic synthesis of α,α-dichloroketones via the utilization of seawater resources.
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Affiliation(s)
| | | | - Cuibo Liu
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
| | - Bo-Hang Zhao
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
| | - Bin Zhang
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
| | - Yongmeng Wu
- Department of Chemistry,
School of Science, Tianjin University, Tianjin 300072, China
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2
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Qi L, Qin Y, Wang X, Chai H, Zhu W, Zhou Y. Electrophilic Halogen Reagents-mediated Halogenation: Synthesis of Halogenated Dihydro-1,3-oxazine Derivatives. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2289-1] [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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3
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Wang X, Chen X, Qi L, Ma X, Zhou Y, Jiang X, Zhu W. Halogenation of Unsaturated Amides: Synthesis of Halogenated (Spiro)Oxazolines. ChemistrySelect 2022. [DOI: 10.1002/slct.202203419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xueqing Wang
- College of Life Sciences China Jiliang University Hangzhou 310018 China
| | - Xuerong Chen
- College of Life Sciences China Jiliang University Hangzhou 310018 China
| | - Liang Qi
- College of Life Sciences China Jiliang University Hangzhou 310018 China
| | - Xingyu Ma
- School of Pharmaceutical Science Sun Yat-Sen University Guangzhou 510006 China
| | - Yifeng Zhou
- College of Life Sciences China Jiliang University Hangzhou 310018 China
| | - Xianxing Jiang
- School of Pharmaceutical Science Sun Yat-Sen University Guangzhou 510006 China
| | - Weiwei Zhu
- School of Pharmaceutical Science Sun Yat-Sen University Guangzhou 510006 China
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4
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Pramod Charpe V, Gupta M, Chu Hwang K. Visible-Light-Induced Oxidative α-keto-Dichlorination of Arylalkynes by CuCl 2 at Room Temperature. CHEMSUSCHEM 2022; 15:e202200957. [PMID: 35730105 DOI: 10.1002/cssc.202200957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/21/2022] [Indexed: 06/15/2023]
Abstract
A visible light-induced oxidative α-keto-dichlorination of terminal and internal aryl alkynes was developed to form dichloroacetophenones (DCAPs) and dichlorophenyl-acetophenones (DCPAPs), respectively, by using CuCl2 as a photoredox catalyst in the presence of air at room temperature (without using any exogenous photocatalyst). Here, photoexcited CuCl2 underwent ligand-to-metal charge transfer to generate a Cl radical, which readily added to the alkynes to form DCAPs or DCPAPs in the presence of O2 . This α-keto-dichlorination reaction is a green and mild protocol as it produced water as the only by-product. Moreover, the evaluation of green chemistry metrics indicated that the E-factor (mass of wastes/mass of products) of the current α-keto-chlorination method is around 10.1 times lower than that of a literature-reported photochemical method. The Eco Scale value (score 55, which on a scale of 0-100 indicates an acceptable synthesis) signifies that this process is simple, highly efficient, eco-friendly, and cost-effective.
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Affiliation(s)
| | - Mahima Gupta
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, R. O. C
| | - Kuo Chu Hwang
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, R. O. C
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5
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Sadhukhan S, Baire B. Tunable Lewis Basicity and Nucleophilicity of Water against α,α-Dihalo-β-acetoxyketones for the Selective Synthesis of α-Haloenones and 1,2-Diketones. J Org Chem 2022; 87:5530-5542. [PMID: 35394788 DOI: 10.1021/acs.joc.1c02780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The discovery and systematic study of tunable yet competitive nucleophilicity and Lewis basicity of water against novel building blocks α,α-dihalo-β-acetoxyketones (possessing a tertiary acetate) have been reported. This distinct reactivity resulted in the formation of two competitive and different products 1,2-diketones and α-haloenones from a common intermediate α,α-dihalo-β-acetoxyketones through the nucleophilicity and Lewis basicity of water, respectively. A systematic study to understand the effect of temperature and amount of water on the product distribution revealed that a lower temperature in combination with a higher amount of water shows a high preference for 1,2-diketones over α-haloenones. Measuring the dielectric constant (permittivity, ε) of various reaction media at various temperatures and a correlation with the experimental observations suggested that the reaction media with a higher dielectric constant exhibit the nucleophilic character and hence show a preference for 1,2-diketones over α-haloenones.
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Affiliation(s)
- Santu Sadhukhan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
| | - Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamilnadu, India
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6
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Ahmed N, Spears RJ, Sheppard TD, Chudasama V. Functionalisation of ethereal-based saturated heterocycles with concomitant aerobic C–H activation and C–C bond formation. Chem Sci 2022; 13:8626-8633. [PMID: 35974756 PMCID: PMC9337743 DOI: 10.1039/d2sc01626e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/24/2022] [Indexed: 11/21/2022] Open
Abstract
Herein we disclose a novel method for the aerobic C–H activation of ethereal-based heterocycles to generate various α-functionalised building blocks.
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Affiliation(s)
- Nehaal Ahmed
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Richard J. Spears
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Tom D. Sheppard
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Vijay Chudasama
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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7
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One‐pot Synthesis of Substituted Pyrazoles from Propargyl Alcohols via Cyclocondensation of in situ‐Generated α‐Iodo Enones/Enals and Hydrazine Hydrate. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100318] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Zheng Z, Ma X, Cheng X, Zhao K, Gutman K, Li T, Zhang L. Homogeneous Gold-Catalyzed Oxidation Reactions. Chem Rev 2021; 121:8979-9038. [DOI: 10.1021/acs.chemrev.0c00774] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Zhitong Zheng
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Xu Ma
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Xinpeng Cheng
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Ke Zhao
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Kaylaa Gutman
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Tianyou Li
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Liming Zhang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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9
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Wang D, Wan Z, Zhang H, Lei A. Electrochemical Oxidative Functionalization of Arylalkynes: Access to α,α‐Dibromo Aryl Ketones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001105] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dan Wang
- The Institute for Advanced Studies (IAS) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 People's Republic of China
| | - Zhaohua Wan
- The Institute for Advanced Studies (IAS) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 People's Republic of China
| | - Heng Zhang
- The Institute for Advanced Studies (IAS) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 People's Republic of China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS) College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 People's Republic of China
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10
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Justaud F, Hachem A, Grée R. Recent Developments in the Meyer‐Schuster Rearrangement. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001494] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Frédéric Justaud
- Univ Rennes CNRS (Institut for Chemical Sciences in Rennes), UMR 6226 35000 Rennes France
| | - Ali Hachem
- Lebanese University Faculty of Sciences (I) Laboratory for Medidinal Chemistry and Natural Products and PRASE-EDST Hadath Lebanon
| | - René Grée
- Univ Rennes CNRS (Institut for Chemical Sciences in Rennes), UMR 6226 35000 Rennes France
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11
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Pradhan TR, Park JK. An Overview of Water‐Mediated Alkyne Functionalization by Neighboring Group Participation of Carbonyl Groups. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000826] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Tapas R. Pradhan
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
| | - Jin Kyoon Park
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 46241 Korea
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12
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Trost BM, Tracy JS. Catalytically Generated Vanadium Enolates Formed via Interruption of the Meyer-Schuster Rearrangement as Useful Reactive Intermediates. Acc Chem Res 2020; 53:1568-1579. [PMID: 32692147 DOI: 10.1021/acs.accounts.0c00285] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Enolate chemistry is one of the most fundamental strategies for the formation of carbon-carbon and carbon-heteroatom bonds. Classically, this has been accomplished through the use of stoichiometric quantities of strong base and cryogenic reaction temperatures. However, these techniques present issues related to enolate regioselectivity and functional group tolerance. While more modern methods utilizing stoichiometric activating agents have overcome some of these limitations, these processes add additional steps and suffer from poor atom economy. While certain classes of highly acidic nucleophiles have enabled the development of elegant and general catalytic solutions to address all of these limitations, functionalizing less acidic nucleophiles remains difficult.To overcome these challenges, we developed an alternative general approach for the formation and subsequent functionalization of metal enolates that leverages catalytic amounts of Lewis acid and entirely avoids the need for exogenous base or stoichiometric additives. To do so, we re-engineered the classical Meyer-Schuster rearrangement, which normally converts propargylic alcohols into α,β-unsaturated carbonyl compounds. By careful control of reaction conditions and by selection of an appropriate vanadium-oxo catalyst, the transient metal enolates formed via the 1,3-transposition of propargylic or allenylic alcohols can be guided away from simple protonation reaction pathways and toward more synthetically productive carbon-carbon, carbon-halogen, and carbon-nitrogen bond-forming processes.By utilizing readily available propargylic and allenylic alcohols as our starting materials and relying on a catalytic 1,3-transposition to generate metal enolates in situ, all issues related to the regioselectivity of enolate formation are resolved. Likewise, utilization of a simple isomerization for enolate formation results in a highly efficient process that can be 100% atom economical. The mild reaction conditions employed also allow for remarkable chemoselectivity. Functional groups not typically conducive to enolate chemistry, such as alkynyl ketones, methyl ketones, free alcohols, and primary alkyl halides, are all well tolerated. Finally, by varying the substitution patterns of the alcohol starting materials, enolates of ketones, esters, and even amides are all accessible.Utilizing this strategy starting from propargylic alcohols, we have developed functionalization reactions that produce highly substituted and geometrically defined α-functionalized α,β-unsaturated carbonyl compounds. Such processes include aldol, Mannich, and electrophilic halogenation reactions, as well as dual catalytic reactions wherein catalytically generated vanadium enolates are trapped with catalytically generated palladium π-allyl electrophiles. In the case of allenylic alcohols, we have developed complementary aldol, Mannich, halogenation, and dual catalytic processes to generate α'-functionalized α,β-unsaturated carbonyl products.The results described in this work showcase the power and generality of our alternative approach to enolate chemistry. Additionally, we point out unaddressed challenges in the field and invite other groups to help innovate in these areas.
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Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
| | - Jacob S. Tracy
- Department of Chemistry, Stanford University, 333 Campus Drive, Stanford, California 94305, United States
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13
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Day DP, Alsenani NI. Dibromoisocyanuric Acid: Applications in Brominations and Oxidation Processes for the Synthesis of High Value Compounds. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- David P. Day
- São Carlos Institute of ChemistryUniversity of São Paulo 13560-970, São Carlos SP Brazil
| | - Nawaf I. Alsenani
- Department of ChemistryAl-Baha University Al Bahah 1988 Al-Baha Saudi Arabia
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14
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Banerjee S, Ambegave SB, Mule RD, Senthilkumar B, Patil NT. Gold-Catalyzed Alkynylative Meyer–Schuster Rearrangement. Org Lett 2020; 22:4792-4796. [DOI: 10.1021/acs.orglett.0c01596] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Somsuvra Banerjee
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. HomiBhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research, Ghaziabad 201 002, India
| | - Shivhar B. Ambegave
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Ravindra D. Mule
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. HomiBhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research, Ghaziabad 201 002, India
| | - Beeran Senthilkumar
- Division of Organic Chemistry, CSIR-National Chemical Laboratory, Dr. HomiBhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research, Ghaziabad 201 002, India
| | - Nitin T. Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
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15
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Sadhukhan S, Santhi J, Baire B. The α,α‐Dihalocarbonyl Building Blocks: An Avenue for New Reaction Development in Organic Synthesis. Chemistry 2020; 26:7145-7175. [DOI: 10.1002/chem.201905475] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/08/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Santu Sadhukhan
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
| | - Jampani Santhi
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
| | - Beeraiah Baire
- Department of ChemistryIndian Institute of Technology Madras Chennai 600036 India
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16
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Meng X, Zhang Y, Luo J, Wang F, Cao X, Huang S. Electrochemical Oxidative Oxydihalogenation of Alkynes for the Synthesis of α,α-Dihaloketones. Org Lett 2020; 22:1169-1174. [DOI: 10.1021/acs.orglett.0c00052] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiangtai Meng
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Yu Zhang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Jinyue Luo
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Fei Wang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Xiaoji Cao
- College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Rd, Hangzhou, Zhejiang 310014, P. R. China
| | - Shenlin Huang
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, P. R. China
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17
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The synthesis and structural characterization of furanyl-1,2,3-triazole Gold(I) and its application in synthesis of enones from propargylic esters and alcohols. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.120944] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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18
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Hu W, Shan L, Ma F, Zhang Y, Yang Y, Wang D. The synthesis of methyl triazole-4-carboxylate gold(I) complex and application on allene synthesis and alkyne hydration. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.107564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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19
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Laserna V, Porter MJ, Sheppard TD. Gold-Catalyzed Hydroamination of Propargylic Alcohols: Controlling Divergent Catalytic Reaction Pathways To Access 1,3-Amino Alcohols, 3-Hydroxyketones, or 3-Aminoketones. J Org Chem 2019; 84:11391-11406. [PMID: 31418573 DOI: 10.1021/acs.joc.9b00988] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A versatile approach to the valorization of propargylic alcohols is reported, enabling controlled access to three different products from the same starting materials. First, a general method for the hydroamination of propargylic alcohols with anilines is described using gold catalysis to give 3-hydroxyimines with complete regioselectivity. These 3-hydroxyimines can be reduced to give 1,3-amino alcohols with high syn selectivity. Alternatively, by using a catalytic quantity of aniline, 3-hydroxyketones can be obtained in high yield directly from propargylic alcohols. Further manipulation of the reaction conditions enables the selective formation of 3-aminoketones via a rearrangement/hydroamination pathway. The utility of the new chemistry was exemplified by the one-pot synthesis of a selection of N-arylpyrrolidines and N-arylpiperidines. A mechanism for the hydroamination has been proposed on the basis of experimental studies and density functional theory calculations.
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Affiliation(s)
- Victor Laserna
- Department of Chemistry, Christopher Ingold Laboratories , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
| | - Michael J Porter
- Department of Chemistry, Christopher Ingold Laboratories , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
| | - Tom D Sheppard
- Department of Chemistry, Christopher Ingold Laboratories , University College London , 20 Gordon Street , London WC1H 0AJ , U.K
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20
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Laserna V, Jeapes Rojas C, Sheppard TD. Gold-Catalyzed Hydrophenoxylation of Propargylic Alcohols and Amines: Synthesis of Phenyl Enol Ethers. Org Lett 2019; 21:4443-4447. [PMID: 31184177 DOI: 10.1021/acs.orglett.9b01208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A practical method for the synthesis of phenyl enol ethers is reported. The combination of a gold(I) catalyst and potassium carbonate selectively mediates the addition of phenols to propargylic alcohols/amines in a chemo-, regio-, and stereoselective fashion in high yield. The resulting enol ethers are formed exclusively with a Z-configuration and can be obtained from a wide array of phenols and propargylic alcohols or amines with the reaction showing excellent functional group tolerance.
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Affiliation(s)
- Victor Laserna
- Department of Chemistry , University College of London , 20 Gordon Street , London , WC1H 0AJ , U.K
| | - Catherine Jeapes Rojas
- Department of Chemistry , University College of London , 20 Gordon Street , London , WC1H 0AJ , U.K
| | - Tom D Sheppard
- Department of Chemistry , University College of London , 20 Gordon Street , London , WC1H 0AJ , U.K
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21
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Li Y, Mou T, Lu L, Jiang X. Visible-light-promoted oxidative halogenation of alkynes. Chem Commun (Camb) 2019; 55:14299-14302. [DOI: 10.1039/c9cc07655g] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In nature, halogenation promotes the biological activity of secondary metabolites, especially geminal dihalogenation.
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Affiliation(s)
- Yiming Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Tao Mou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Lingling Lu
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences
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22
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Wang YC, Wang RX, Qiu G, Zhou H, Xie W, Liu JB. ortho-Amide-directed 2,4-dibromohydration of conjugated enynes. Org Chem Front 2019. [DOI: 10.1039/c9qo00540d] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A NBS-mediated and ortho-amide-directed 2,4-dibromohydration of enynes is described in this paper.
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Affiliation(s)
- Yu-Chao Wang
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
| | - Rui-Xiang Wang
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
| | - Guanyinsheng Qiu
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Hongwei Zhou
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Wenlin Xie
- School of Chemistry and Chemical Engineering
- Hunan University of Science and Technology
- Hunan 411201
- China
| | - Jin-Biao Liu
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
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23
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Metal‐Free Regioselective Chloroazidation of Internal Alkynes. Chemistry 2018; 25:981-984. [DOI: 10.1002/chem.201805320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Indexed: 12/12/2022]
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24
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Guo J, Xu X, Xing Q, Gao Z, Gou J, Yu B. Furfuryl Cation Induced Cascade Formal [3 + 2] Cycloaddition/Double Ring-Opening/Chlorination: An Approach to Chlorine-Containing Complex Triazoles. Org Lett 2018; 20:7410-7414. [PMID: 30412412 DOI: 10.1021/acs.orglett.8b03121] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A TiCl4-promoted cascade formal [3 + 2] cycloaddition/double ring-opening/chlorination of 2-furylcyclobutanols with alkyl or aryl azides is described. This highly efficient transformation involves the formation/cleavage of several C-N, C-Cl, C-C, and C-O bonds in a single operation. It enables the quick construction of trisubstituted 1,2,3-triazoles with an ( E)-enone moiety and a 3-chloropropyl unit. The chlorinated products are readily transformed into other structurally diverse analogues.
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Affiliation(s)
- Jiawei Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Xiaoming Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Qingzhao Xing
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Ziwei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
| | - Jing Gou
- Shaanxi Key Laboratory for Advanced Energy Devices , Shaanxi Normal University , Xi'an 710062 , China
| | - Binxun Yu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical , Shaanxi Normal University , Xi'an 710062 , China
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25
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Zhang B, Wang T. Gold-Catalyzed Transformations of Propargyl Alcohols and Propargyl Amines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800324] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bing Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Shaanxi Normal University; No.620 West Chang'an Avenue Xi'an 710119 China
| | - Tao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering; Shaanxi Normal University; No.620 West Chang'an Avenue Xi'an 710119 China
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26
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Gibson SM, D'Oyley JM, Higham JI, Sanders K, Laserna V, Aliev AE, Sheppard TD. Dihalohydration of Alkynols: A Versatile Approach to Diverse Halogenated Molecules. European J Org Chem 2018; 2018:4018-4028. [PMID: 30147439 PMCID: PMC6099344 DOI: 10.1002/ejoc.201800668] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Indexed: 11/28/2022]
Abstract
In this paper we outline how dihalohydration reactions of propargylic alcohols can be used to access a wide variety of useful halogenated building blocks. A novel procedure for dibromohydration of alkynes has been developed, and a selection of dichloro and dibromo diols and cyclic ethers were synthesized. The dihalohydration of homo-propargylic alcohols provides a useful route to 3-halofurans, which were shown to readily undergo cycloaddition reactions under mild conditions. Finally, a novel ring expansion of propargylic alcohols containing a cyclopropylalkyne provides access to halogenated alkenylcyclobutanes.
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Affiliation(s)
- Samantha M. Gibson
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Jarryl M. D'Oyley
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Joe I. Higham
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Kate Sanders
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Victor Laserna
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Abil E. Aliev
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
| | - Tom D. Sheppard
- Christopher Ingold LaboratoriesUniversity College London20 Gordon St, LondonWC1H 0AJUK
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27
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Wang RX, Yuan ST, Liu JB, Wu J, Qiu G. Regioselective 5-exo-dig oxy-cyclization of 2-alkynylbenzamide for the synthesis of isobenzofuran-1-imines and isobenzofuran. Org Biomol Chem 2018; 16:4501-4508. [DOI: 10.1039/c8ob00779a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A TBAB-mediated regioselective radical cyclization of 2-alkynylbenzamide is described herein for the synthesis of isobenzofuran-1-imines. The reactions proceeded smoothly under mild conditions.
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Affiliation(s)
- Rui-Xiang Wang
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
| | - Si-Tian Yuan
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
- College of Biological
| | - Jin-Biao Liu
- School of Metallurgical and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- China
| | - Jie Wu
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Guanyinsheng Qiu
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
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28
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Huang R, Yang Y, Wang DS, Zhang L, Wang D. Where does Au coordinate to N-(2-pyridiyl)benzotriazole: gold-catalyzed chemoselective dehydrogenation and borrowing hydrogen reactions. Org Chem Front 2018. [DOI: 10.1039/c7qo00756f] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Pyridyltriazole gold(i) complexes proved to be an efficient precatalyst for the most challenging gold-catalyzed borrowing hydrogen reaction and dehydrogenation of alcohols and amines.
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Affiliation(s)
- Ronghui Huang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Yongchun Yang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | | | - Liang Zhang
- National Engineering Laboratory for Cereal Fermentation Technology
- Jiangnan University
- Wuxi 214122
- China
| | - Dawei Wang
- Key Laboratory of Synthetic and Biological Colloids
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
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29
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Sadhukhan S, Baire B. An Expeditious Approach to α,α-Dihalo-α′-acetoxyketones from Propargylic Acetates. ChemistrySelect 2017. [DOI: 10.1002/slct.201701398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Santu Sadhukhan
- Department of Chemistry; Indian Institute of Technology Madras; Chennai- 600036 INDIA
| | - Beeraiah Baire
- Department of Chemistry; Indian Institute of Technology Madras; Chennai- 600036 INDIA
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30
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Yuan ST, Wang YH, Liu JB, Qiu G. NBS-Mediated Oxygen Transfer Reaction of Carbonyl in Ester: Efficient Synthesis of Benzil-o
-carboxylate Derivative From o
-Alkynylbenzoate. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700168] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Si-Tian Yuan
- College of Biological; Chemical Science and Engineering; Jiaxing University; 118 Jiahang Road Jiaxing People's Republic of China
- School of Metallurgical and Chemical Engineering; Jiangxi University of Science and Technology; 86 Hongqi Road Ganzhou 341000 People's Republic of China
| | - Yan-Hua Wang
- School of Metallurgical and Chemical Engineering; Jiangxi University of Science and Technology; 86 Hongqi Road Ganzhou 341000 People's Republic of China
| | - Jin-Biao Liu
- School of Metallurgical and Chemical Engineering; Jiangxi University of Science and Technology; 86 Hongqi Road Ganzhou 341000 People's Republic of China
| | - Guanyinsheng Qiu
- College of Biological; Chemical Science and Engineering; Jiaxing University; 118 Jiahang Road Jiaxing People's Republic of China
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31
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Tharra P, Baire B. A coherent study on the Z-enoate assisted Meyer–Schuster rearrangement. Org Biomol Chem 2017. [DOI: 10.1039/c7ob01221g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The impact of temperature, solvent, concentration of the counter ion and the nature of the arene nucleophile on the Z-enoate assisted Meyer–Schuster rearrangement of propargylic alcohols was studied.
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Affiliation(s)
| | - Beeraiah Baire
- Department of Chemistry
- Institute of Technology Madras
- Chennai-600036
- India
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32
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Qiu G, Li Y, Ma L, Zhou H. KBr/K2S2O8-mediated dibromohydration of N-(2-alkynylaryl)acetamide. Org Chem Front 2017. [DOI: 10.1039/c6qo00840b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A neighbouring acetamino group-participated regioselective dibromohydration of N-(2-alkynylaryl)acetamide is described here for the synthesis of N-(2-(2,2-dibromo-2-arylacetyl)aryl)acetamide.
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Affiliation(s)
- Guanyinsheng Qiu
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Yuewen Li
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Lele Ma
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
| | - Hongwei Zhou
- College of Biological
- Chemical Science and Engineering
- Jiaxing University
- Jiaxing 314001
- China
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33
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Dong XY, Gao LX, Zhang WQ, Cui YM, Yang KF, Gao ZW, Xu LW. Evolution of Cobalt Catalysis for Catalytic Construction of Si-H -Containing Semi-Penetrating Networks: Updated Application in Nanosilver-Catalyzed Alkynylation of Paraformaldehyde. ChemistrySelect 2016. [DOI: 10.1002/slct.201600952] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiao-Yun Dong
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education (MOE) and School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 P. R. China
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University, No 1378; Wenyi West Road, Science Park of HZNU Hangzhou
| | - Ling-Xiang Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education (MOE) and School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 P. R. China
| | - Wei-Qiang Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education (MOE) and School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 P. R. China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University, No 1378; Wenyi West Road, Science Park of HZNU Hangzhou
| | - Ke-Fang Yang
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University, No 1378; Wenyi West Road, Science Park of HZNU Hangzhou
| | - Zi-Wei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education (MOE) and School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 P. R. China
| | - Li-Wen Xu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education (MOE) and School of Chemistry and Chemical Engineering; Shaanxi Normal University; Xi'an 710062 P. R. China
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education; Hangzhou Normal University, No 1378; Wenyi West Road, Science Park of HZNU Hangzhou
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34
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Yang Y, Hu W, Ye X, Wang D, Shi X. Preparation of Triazole Gold(III) Complex as an Effective Catalyst for the Synthesis of
E
‐α‐Haloenones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600243] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yongchun Yang
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province, People's Republic of China
| | - Wenkang Hu
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province, People's Republic of China
| | - Xiaohan Ye
- Department of Chemistry University of South Florida 4202 E. Fowler Ave Tampa, Florida 33620 USA
| | - Dawei Wang
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province, People's Republic of China
| | - Xiaodong Shi
- Department of Chemistry University of South Florida 4202 E. Fowler Ave Tampa, Florida 33620 USA
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35
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Yang Y, Shen Y, Wang X, Zhang Y, Wang D, Shi X. Triazole acetyl gold(III) catalyzed Meyer–Schuster rearrangement of propargyl alcohols. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.04.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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Pennell MN, Kyle MP, Gibson SM, Male L, Turner PG, Grainger RS, Sheppard TD. Intercepting the Gold-Catalysed Meyer-Schuster Rearrangement by Controlled Protodemetallation: A Regioselective Hydration of Propargylic Alcohols. Adv Synth Catal 2016; 358:1519-1525. [PMID: 29200990 PMCID: PMC5698882 DOI: 10.1002/adsc.201600101] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/18/2016] [Indexed: 12/16/2022]
Abstract
The regioselective gold‐catalysed hydration of propargylic alcohols to β‐hydroxy ketones can be achieved by diverting the gold‐catalysed Meyer–Schuster rearrangement through the addition of a protic additive with a pKa of 7–9 such as p‐nitrophenol, boric acid or a boronic acid. This provides an interesting alternative to an aldol reaction when combined with the straightforward addition of an alkyne to an aldehyde or ketone. The gold‐catalysed reaction of an electron‐deficient, sterically hindered propargylic alcohol with a boronic acid led to the formation of an unusually stable cyclic boron enolate. ![]()
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Affiliation(s)
- Matthew N Pennell
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
| | - Michael P Kyle
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Samantha M Gibson
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
| | - Louise Male
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Peter G Turner
- GlaxoSmithKline Medicines Research Centre Gunnels Wood Road Stevenage, Herts SG1 2NY U.K
| | - Richard S Grainger
- School of Chemistry University of Birmingham Edgbaston, Birmingham B15 2TT U.K
| | - Tom D Sheppard
- Department of Chemistry, University College London Christopher Ingold Laboratories 20 Gordon Street London WC1H 0AJ U.K
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37
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Huang FQ, Xie J, Sun JG, Wang YW, Dong X, Qi LW, Zhang B. Regioselective Synthesis of Carbonyl-Containing Alkyl Chlorides via Silver-Catalyzed Ring-Opening Chlorination of Cycloalkanols. Org Lett 2016; 18:684-7. [DOI: 10.1021/acs.orglett.5b03649] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Feng-Qing Huang
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Jian Xie
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Jian-Guo Sun
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Yue-Wei Wang
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Xin Dong
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Lian-Wen Qi
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
| | - Bo Zhang
- State Key Laboratory
of Natural
Medicines, China Pharmaceutical University, 24 Tongjia Xiang, Nanjing 210009, China
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38
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Shu C, Li L, Shen CH, Ruan PP, Liu CY, Ye LW. Gold-Catalyzed Tandem Cycloisomerization-Halogenation of Chiral Homopropargyl Sulfonamides. Chemistry 2016; 22:2282-90. [DOI: 10.1002/chem.201503891] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Indexed: 12/28/2022]
Affiliation(s)
- Chao Shu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Long Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Cang-Hai Shen
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Peng-Peng Ruan
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Chao-Yue Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces and The Key Laboratory for Chemical Biology of Fujian Province; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 Fujian P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; Shanghai 200032 P. R. China
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39
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Tharra P, Baire B. The Z-enoate assisted, Meyer–Schuster rearrangement cascade: unconventional synthesis of α-arylenone esters. Chem Commun (Camb) 2016; 52:12147-12150. [DOI: 10.1039/c6cc06639a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Brønsted acid promoted nucleophilation of propargylic alcohols during the Meyer–Schuster rearrangement (M–S) has been introduced. The reverse polarization of the M–S intermediate allenyl cation has been realized by employing a novel concept of cis-enoate assistance strategy.
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Affiliation(s)
| | - Beeraiah Baire
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600036
- India
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40
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Queensen MJ, Rabus JM, Bauer EB. Ferrocenium hexafluorophosphate as an inexpensive, mild catalyst for the etherification of propargylic alcohols. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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41
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Bai Y, Yin J, Liu Z, Zhu G. Construction of 1-Naphthols via Benzannulation Based on the Reaction of Aryl tert-Butyl Ynol Ethers with Ynamides or Ynol Ethers. J Org Chem 2015; 80:10226-33. [PMID: 26389568 DOI: 10.1021/acs.joc.5b01858] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A new version of benzannulation featuring the use of aromatic tert-butyl ynol ethers as the convenient precursors for arylketenes has been developed. Both ynamides and ynol ethers undergo this reaction smoothly, giving 3-amino and 3-alkoxy 1-naphthols in good to excellent yields under the heated reaction conditions. The high efficiency, excellent regioselectivity, good functional group compatibility, and broad substrate scope render this reaction particularly valuable for organic synthesis.
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Affiliation(s)
- Yihui Bai
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
| | - Jing Yin
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
| | - Zhicheng Liu
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
| | - Gangguo Zhu
- Department of Chemistry, Zhejiang Normal University , 688 Yingbin Road, Jinhua 321004, China
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42
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Hu Y, Li X, Wan B. NIS-mediated ring-closure/opening cascade reactions of allylamides: an expedient route to oxazolines. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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43
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Tharra P, Baire B. Mild Approach to 2-Acylfurans via Intercepted Meyer–Schuster Rearrangement of 6-Hydroxyhex-2-en-4-ynals. J Org Chem 2015. [DOI: 10.1021/acs.joc.5b01420] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Prabhakararao Tharra
- Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Beeraiah Baire
- Department
of Chemistry, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
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44
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Hu Y, Yi R, Yu X, Xin X, Wang C, Wan B. O-Transfer-facilitated cyclizations of propargylamides with TMSN3: selective synthesis of tetrazoles and dihydroimidazoles. Chem Commun (Camb) 2015; 51:15398-401. [DOI: 10.1039/c5cc05715a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we disclose the O-transfer-facilitated cyclizations of propargylamides with TMSN3 to selectively afford functionalized tetrazoles and diiodomethylated dihydroimidazoles.
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Affiliation(s)
- Yancheng Hu
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Ruxia Yi
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xinzhang Yu
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Xiaoyi Xin
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Chunxiang Wang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Boshun Wan
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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45
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Hu L, Che C, Tan Z, Zhu G. A rapid and selective synthesis of α,α-fluorohalo esters via fluorohalogenative or difluorinative hydration of ynol ethers. Chem Commun (Camb) 2015; 51:16641-4. [DOI: 10.1039/c5cc07471a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Selectfluor-mediated fluorohalogenative or difluorinative hydration of ynol ethers is described, giving various α,α-fluorohalo esters including α,α-bromofluoro, α,α-chlorofluoro, α,α-fluoroiodo, and α,α-difluoro esters in a highly selective manner under mild reaction conditions.
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Affiliation(s)
- Liang Hu
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- P. R. China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
| | - Chao Che
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- P. R. China
| | - Ze Tan
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
- P. R. China
| | - Gangguo Zhu
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- P. R. China
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Zhang D, Nakamura I, Terada M. Copper-catalyzed cascade transformation of O-propargylic oximes with sulfonyl azides to α,β-unsaturated N-acylamidines. Org Lett 2014; 16:5184-7. [PMID: 25226502 DOI: 10.1021/ol502541w] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Copper-catalyzed cascade transformations of O-propargylic oximes and sulfonyl azides were carried out to efficiently afford α,β-unsaturated N-acylamidines. The reaction involved the intramolecular attack of the oxime group to the ketenimine moiety that was generated in situ, followed by the cleavage of the N-O bond.
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Affiliation(s)
- Dong Zhang
- Department of Chemistry, Graduate School of Science, Tohoku University , Sendai 980-8578, Japan
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