1
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Miyazaki M, Ura Y. Palladium/Iron-Catalyzed Wacker-Type Oxidation of Aliphatic Terminal and Internal Alkenes Using O 2. ACS OMEGA 2023; 8:41983-41990. [PMID: 37969998 PMCID: PMC10634151 DOI: 10.1021/acsomega.3c07577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 10/06/2023] [Indexed: 11/17/2023]
Abstract
The Wacker-type oxidation of aliphatic terminal alkenes proceeds using a Pd/Fe catalyst system under mild reaction conditions using 1 atm O2 without other additives. The use of 1,2-dimethoxyethane/H2O as a mixed solvent was effective. The slow addition of alkenes is also important for improving product yields. Fe(III) citrate was the most efficient cocatalyst among the iron complexes examined, whereas other complexes such as FeSO4, Fe2(SO4)3, Fe(NO3)3, and Fe2O3 were also operative. This method is also applicable to aliphatic internal alkenes, which are generally difficult to oxidize using conventional Pd/Cu catalyst systems. The gram-scale synthesis and reuse of the Pd catalysts were also demonstrated.
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Affiliation(s)
- Mayu Miyazaki
- Department of Chemistry,
Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Yasuyuki Ura
- Department of Chemistry,
Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
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2
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Wang J, Luo Z, Wu Y, Tang Y, Yang X, Tsui GC. Copper-Catalyzed Visible-Light-Induced Allylic Difluoromethylation of Unactivated Alkenes Using Difluoroacetic Acid. Org Lett 2023; 25:1045-1049. [PMID: 36752311 DOI: 10.1021/acs.orglett.3c00265] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
We herein describe a straightforward allylic difluoromethylation reaction of unactivated alkenes. Compared to cross-couplings of prefunctionalized allylic substrates for the construction of allylic CF2H bonds, this reaction employs readily available alkenes as substrates under mild conditions. Difluoroacetic acid is used as an inexpensive and easy-to-handle source of CF2H radical under visible light irradiation with PIDA. The copper catalyst plays an important role of diverting the reaction pathway toward allylic difluoromethylation as opposed to previously found hydrodifluoromethylation.
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Affiliation(s)
- Jinlian Wang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Ziwei Luo
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Yili Wu
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Yihan Tang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Xinkan Yang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Gavin Chit Tsui
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
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3
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Tanaka R, Komori S, Shimizu Y, Kataoka Y, Ura Y. Synthesis of 2-hydroxytetrahydrofurans by Wacker-type oxidation of 1,1-disubstituted alkenes. Org Biomol Chem 2022; 20:570-574. [PMID: 34989385 DOI: 10.1039/d1ob02277f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,1-Disubstituted alkenes feature high steric hindrance, which renders their Wacker-type oxidation difficult. We demonstrate the stereoselective synthesis of 2-hydroxytetrahydrofurans via the Wacker-type oxidation of 3-methyl-3-buten-1-ols by using a PdCl2(MeCN)2/NO/BQ catalyst system under 1 atm O2 in H2O or H2O/DMF.
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Affiliation(s)
- Rina Tanaka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
| | - Saki Komori
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
| | - Yuhei Shimizu
- Synthesis Research Laboratory, Kurashiki Research Center, Kuraray Co., Ltd, 2045-1, Sakazu, Kurashiki, Okayama 710-0801, Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara 630-8506, Japan.
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4
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Ura Y. Realization of Anti-Markovnikov Selectivity in Pd-Catalyzed Oxidative Acetalization and Wacker-Type Oxidation of Terminal Alkenes. CHEM REC 2021; 21:3458-3469. [PMID: 34021681 DOI: 10.1002/tcr.202100090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/21/2021] [Indexed: 11/10/2022]
Abstract
Catalytic oxidative acetalization and Wacker-type oxidation of terminal alkenes normally proceed with Markovnikov selectivity to afford internally oxyfunctionalized compounds, such as internal acetals and ketones. Thus, the realization of anti-Markovnikov (AM) selectivity in these reactions is challenging. This account focuses on our recent development of Pd-catalyzed AM oxidation of terminal alkenes (mainly styrenes and aliphatic alkenes), that is, oxidative acetalization (oxidation to terminal acetals) and Wacker-type oxidation (oxidation to aldehydes). The key factors that enhance the yield and AM selectivity of the products found in our studies are: 1) the steric bulkiness of the oxygen nucleophiles that attack on the coordinated alkenes, 2) the electron-deficient cyclic alkenes as additives that withdraw electrons from Pd, 3) the slow addition of substrates in the case of the aliphatic alkenes, which suppresses the isomerization of the terminal alkenes into internal alkenes, and 4) the halogen directing groups in the case of aliphatic alkenes.
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Affiliation(s)
- Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women's University, Kitauoyanishi-machi, Nara, 630-8506, Japan
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5
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Muzart J. Progress in the synthesis of aldehydes from Pd-catalyzed Wacker-type reactions of terminal olefins. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Ura Y. Palladium-Catalyzed Anti-Markovnikov Oxidation of Aromatic and Aliphatic Alkenes to Terminal Acetals and Aldehydes. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1706570] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
AbstractCatalytic anti-Markovnikov (AM) oxidation of terminal alkenes can provide terminally oxyfunctionalized organic compounds. This short review mainly summarizes our recent progress on the Pd-catalyzed AM oxidations of aromatic and aliphatic terminal alkenes to give terminal acetals (oxidative acetalization) and aldehydes (Wacker-type oxidation), along with related reports. These reactions demonstrate the efficacy of the PdCl2(MeCN)2/CuCl/electron-deficient cyclic alkenes/O2 catalytic system. Notably, electron-deficient cyclic alkenes such as p-benzoquinones (BQs) and maleimides are key additives that facilitate nucleophilic attack of oxygen nucleophiles on coordinated terminal alkenes and enhance the AM selectivity. BQs also function to oxidize Pd(0) depending on the reaction conditions. Several other factors that improve the AM selectivity, such as the steric demand of the nucleophiles, slow substrate addition, and halogen-directing groups, are also discussed.1 Introduction2 Anti-Markovnikov Oxidation of Aromatic Alkenes to Terminal Acetals3 Anti-Markovnikov Oxidation of Aromatic Alkenes to Aldehydes4 Anti-Markovnikov Oxidation of Aliphatic Alkenes to Terminal Acetals5 Anti-Markovnikov Oxidation of Aliphatic Alkenes to Aldehydes6 Conclusion
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7
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Saha S, Yadav S, Reshi NUD, Dutta I, Kunnikuruvan S, Bera JK. Electronic Asymmetry of an Annelated Pyridyl–Mesoionic Carbene Scaffold: Application in Pd(II)-Catalyzed Wacker-Type Oxidation of Olefins. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02729] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sayantani Saha
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Suman Yadav
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Noor U Din Reshi
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Indranil Dutta
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sooraj Kunnikuruvan
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Jitendra K. Bera
- Department of Chemistry and Center for Environmental Science, Indian Institute of Technology Kanpur, Kanpur 208016, India
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8
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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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9
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Komori S, Yamaguchi Y, Murakami Y, Kataoka Y, Ura Y. Palladium/Copper‐catalyzed Oxidation of Aliphatic Terminal Alkenes to Aldehydes Assisted by
p
‐Benzoquinone. ChemCatChem 2020. [DOI: 10.1002/cctc.202000472] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Saki Komori
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yoshiko Yamaguchi
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yuka Murakami
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science Nara Women's University Kitauoyanishi-machi Nara 630-8506 Japan
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10
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Abstract
We have found that the CuCF2CF3 complex generated from low-cost pentafluoroethane is a convenient and practical source for the CF2CF3 radical under aerobic conditions at room temperature. Using this system, readily available unactivated alkenes can be pentafluoroethylated to provide novel allylic CF2CF3 compounds with excellent E-selectivity and functional group tolerability. Mechanistic studies including TEMPO-CF2CF3 trapping and radical clock experiments provided strong evidence for radical pathways, offering a new opportunity for copper-mediated radical perfluoroalkylation.
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Affiliation(s)
- Xinkan Yang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Gavin Chit Tsui
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
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11
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Xu S, Holst HM, McGuire SB, Race NJ. Reagent Control Enables Selective and Regiodivergent Opening of Unsymmetrical Phenonium Ions. J Am Chem Soc 2020; 142:8090-8096. [DOI: 10.1021/jacs.0c02095] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shiyan Xu
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Hannah M. Holst
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Shelby B. McGuire
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Nicholas J. Race
- Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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12
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An D, Miao X, Ling X, Chen X, Rao W. DBSA‐Catalyzed Regioselective Dehydrative Friedel‐Crafts Arylation of CF
3
‐Containing 3‐Indolyl(2‐thiophenyl)methanols with 2‐Substituted Indoles in Water. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Di An
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Ago-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xinzhu Miao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Ago-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xiangxiang Ling
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Ago-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
| | - Xianxiao Chen
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Ago-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Ago-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
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13
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Thopate Y, Singh R, Rastogi SK, Sinha AK. A Highly Regioselective and Practical Synthesis of α‐Aryl Ketones under a Cooperative Cascade Effect of an Ionic Liquid and Tetrabutylammonium Fluoride. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yogesh Thopate
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi India
| | - Richa Singh
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
| | - Sumit K. Rastogi
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi India
| | - Arun K. Sinha
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Sector 10, Jankipuram Extension Sitapur Road Lucknow 226031 India
- Academy of Scientific and Innovative Research New Delhi India
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14
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He P, Zhao C, Lu J, Zhang Y, Fang M, Du Y. Synthesis of 5-Thio-α-GalCer Analogues with Fluorinated Acyl Chain on Lipid Residue and Their Biological Evaluation. ACS Med Chem Lett 2019; 10:221-225. [PMID: 30783507 DOI: 10.1021/acsmedchemlett.8b00640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 01/30/2019] [Indexed: 12/21/2022] Open
Abstract
Invariant natural killer T (iNKT) cells are a subclass of T cells that initiates the secretion of T helper 1 and 2 cytokines after recognizing CD1d protein presented glycolipid antigens. In this Letter, we designed and synthesized a novel series of CD1d ligand α-galactosylceramides (α-GalCers) in which the acyl chain backbone of the lipid was incorporated with fluorine atoms. The in vivo evaluation of immunostimulatory activities revealed that the synthesized α-5-thio-galactopyranosyl-N-perfluorooctanoyl phytosphingosine exhibited a remarkable potency toward selectively enhancing TH1 cytokine production with the IFN γ/IL-4 ratio of 9/1, while its perfluorotetradecanoyl counterpart showed TH2 profile with an IFN γ/IL-4 ratio of 0.59/1. The analogues synthesized here would be used as probes to study lipid-protein interactions in α-GalCer/CD1d complexes.
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Affiliation(s)
- Peng He
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing 100085, China
| | - Chuanfang Zhao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiao Lu
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yang Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Fang
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuguo Du
- State Key Laboratory of Environmental Chemistry and Eco-toxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing 100085, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, Jiangxi, China
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15
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16
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Chiu HC, See XY, Tonks IA. Dative Directing Group Effects in Ti-Catalyzed [2+2+1] Pyrrole Synthesis: Chemo- and Regioselective Alkyne Heterocoupling. ACS Catal 2019; 9:216-223. [PMID: 31768294 DOI: 10.1021/acscatal.8b04669] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transient dative substrate-Ti interactions have been found to play a key role in controlling the regioselectivity of alkyne insertion and [2+2] cycloaddition in Ti-catalyzed [2+2+1] pyrrole synthesis and Ti-catalyzed alkyne hydroamination. TMS-protected alkynes with pendent Lewis basic groups can invert the regioselectivity of TMS-protected alkyne insertion, leading to the selective formation of highly substituted 3-TMS pyrroles. The competency of various potential directing groups was investigated, and it was found that the directing-group effect can be tuned by modifying the catalyst Lewis acidity, the directing-group basicity, or the directing-group tether length. Dative directing-group effects are unexplored with Ti catalysts, and this study demonstrates the potential power of dative substrate-Ti interactions in tuning selectivity.
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Affiliation(s)
- Hsin-Chun Chiu
- Department of Chemistry, University of Minnesota−Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Xin Yi See
- Department of Chemistry, University of Minnesota−Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Ian A. Tonks
- Department of Chemistry, University of Minnesota−Twin Cities, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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17
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Zhou Y, Zhang C, Zhao Y, Li D, Zhao J, Wang Z, Qu J. Base-Promoted Double-Bond-Migration/Hydrolysis/Isomerization of 4-Aryl-1,1,1-trifluorobut-2-en-2-yl Trifluoromethanesulfonates: A Metal-Free Approach to β-Trifluoromethyl Ketones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuhan Zhou
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Chunxia Zhang
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Yilong Zhao
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Dong Li
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Jinfeng Zhao
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Zhaotian Wang
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals; School of Pharmaceutical Science and Technology; Dalian University of Technology; Linggong road 2 116024 Dalian PR China
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18
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Carlson AS, Calcanas C, Brunner RM, Topczewski JJ. Regiocontrolled Wacker Oxidation of Cinnamyl Azides. Org Lett 2018; 20:1604-1607. [PMID: 29498865 DOI: 10.1021/acs.orglett.8b00344] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A highly regioselective Wacker oxidation has been developed for the oxidation of cinnamyl azides. The catalytic oxidation tolerates the azide functionality, and more than 15 β-azido ketones were isolated (25-92% yield). High regioselectivity for the aryl ketone is observed in all cases. A robustness screen was conducted to determine functional group tolerance. The products of the oxidaiton can be readily diversified.
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Affiliation(s)
- Angela S Carlson
- Department of Chemistry , University of Minnesota Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Cristian Calcanas
- Department of Chemistry , University of Minnesota Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Ryan M Brunner
- Department of Chemistry , University of Minnesota Twin Cities , Minneapolis , Minnesota 55455 , United States
| | - Joseph J Topczewski
- Department of Chemistry , University of Minnesota Twin Cities , Minneapolis , Minnesota 55455 , United States
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19
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Konik YA, Kudrjashova M, Konrad N, Kaabel S, Järving I, Lopp M, Kananovich DG. Two-step conversion of carboxylic esters into distally fluorinated ketones via ring cleavage of cyclopropanol intermediates: application of sulfinate salts as fluoroalkylating reagents. Org Biomol Chem 2018; 15:4635-4643. [PMID: 28513753 DOI: 10.1039/c7ob00680b] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tertiary cyclopropanols easily available from carboxylic esters have been used in the synthesis of distally fluorinated ketones. Cyclopropane ring cleavage reactions in methanol with aqueous tert-butyl hydroperoxide in the presence of a copper(ii) acetate catalyst and sodium triflinate (Langlois reagent) afford β-trifluoromethyl ketones in 16-74% isolated yields. Sodium triflinate serves as a precursor of reactive trifluoromethyl copper species, enabling ring-opening trifluoromethylation, as evidenced by mechanistic studies. We also demonstrate here that other sulfinate salts, such as sodium 1,1-difluoroethanesulfinate, sodium 2-(4-bromophenyl)-1,1-difluoroethanesulfinate and sodium 1-(trifluoromethyl)cyclopropanesulfinate, can be used as fluoroalkylation reagents, resulting in the corresponding fluorinated ketones.
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Affiliation(s)
- Yulia A Konik
- Department of Organic Chemistry, Belarusian State University, Leningradskaya 14, 220050, Minsk, Belarus
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21
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Chu CK, Ziegler DT, Carr B, Wickens ZK, Grubbs RH. Direct Access to β-Fluorinated Aldehydes by Nitrite-Modified Wacker Oxidation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Crystal K. Chu
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Daniel T. Ziegler
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Brian Carr
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Zachary K. Wickens
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
| | - Robert H. Grubbs
- Division of Chemistry and Chemical Engineering; California Institute of Technology; Pasadena CA 91125 USA
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22
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Chu CK, Ziegler DT, Carr B, Wickens ZK, Grubbs RH. Direct Access to β-Fluorinated Aldehydes by Nitrite-Modified Wacker Oxidation. Angew Chem Int Ed Engl 2016; 55:8435-9. [PMID: 27225538 DOI: 10.1002/anie.201603424] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 04/26/2016] [Indexed: 12/17/2022]
Abstract
An aldehyde-selective Wacker-type oxidation of allylic fluorides proceeds with a nitrite catalyst. The method represents a direct route to prepare β-fluorinated aldehydes. Allylic fluorides bearing a variety of functional groups are transformed in high yield and very high regioselectivity. Additionally, the unpurified aldehyde products serve as versatile intermediates, thus enabling access to a diverse array of fluorinated building blocks. Preliminary mechanistic investigations suggest that inductive effects have a strong influence on the rate and regioselectivity of the oxidation.
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Affiliation(s)
- Crystal K Chu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Daniel T Ziegler
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Brian Carr
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Zachary K Wickens
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Robert H Grubbs
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA.
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23
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Yi N, Zhang H, Xu C, Deng W, Wang R, Peng D, Zeng Z, Xiang J. Copper/Silver Cocatalyzed Oxidative Coupling of Vinylarenes with ICH2CF3 or ICH2CHF2 Leading to β-CF3/CHF2-Substituted Ketones. Org Lett 2016; 18:1780-3. [DOI: 10.1021/acs.orglett.6b00498] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Niannian Yi
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Hao Zhang
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Chonghui Xu
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Wei Deng
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Ruijia Wang
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Dongming Peng
- School
of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, P. R. China
| | - Zebing Zeng
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Jiannan Xiang
- State
Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry
and Chemical Engineering, Hunan University, Changsha, 410082, P. R. China
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24
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Kananovich DG, Konik YA, Zubrytski DM, Järving I, Lopp M. Simple access to β-trifluoromethyl-substituted ketones via copper-catalyzed ring-opening trifluoromethylation of substituted cyclopropanols. Chem Commun (Camb) 2016; 51:8349-52. [PMID: 25882978 DOI: 10.1039/c5cc02386f] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Tertiary cyclopropanols react rapidly with Togni reagent in methanol at room temperature in the presence of catalytic amounts (3 mol%) of CuCl affording β-trifluoromethyl ketones in 65-73% isolated yields. Ring opening in 1,2-dialkylsubstituted cyclopropanols gives a mixture of isomeric β-trifluoromethyl ketones in about 50% combined yield.
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Affiliation(s)
- Dzmitry G Kananovich
- Department of Chemistry, Tallinn University of Technology, Akadeemia tee 15, 12618 Tallinn, Estonia.
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25
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Lamb JR, Mulzer M, LaPointe AM, Coates GW. Regioselective Isomerization of 2,3-Disubstituted Epoxides to Ketones: An Alternative to the Wacker Oxidation of Internal Alkenes. J Am Chem Soc 2015; 137:15049-54. [DOI: 10.1021/jacs.5b10419] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Jessica R. Lamb
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Michael Mulzer
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Anne M. LaPointe
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W. Coates
- Department of Chemistry and
Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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26
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Percy JM, McCarter AW, Sewell AL, Sloan N, Kennedy AR, Hirst DJ. Developing the Saegusa–Ito Cyclisation for the Synthesis of Difluorinated Cyclohexenones. Chemistry 2015; 21:19119-27. [DOI: 10.1002/chem.201503653] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Jonathan M. Percy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Adam W. McCarter
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Alan L. Sewell
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Nikki Sloan
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - Alan R. Kennedy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow G1 1XL (UK)
| | - David J. Hirst
- Flexible Discovery Unit, GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY (UK)
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27
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Trifluoromethylation of aromatic alkenes by visible-light-driven photoredox catalysis: Direct conversion of alkenes to 3-trifluoromethyl-1-propenyl and 1,3-bis(trifluoromethyl)-1-propenyl derivatives. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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28
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Park S, Joo JM, Cho EJ. Synthesis of β-Trifluoromethylated Ketones from Propargylic Alcohols by Visible Light Photoredox Catalysis. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500031] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Li Y, Ye Z, Bellman TM, Chi T, Dai M. Efficient Synthesis of β-CF3/SCF3-Substituted Carbonyls via Copper-Catalyzed Electrophilic Ring-Opening Cross-Coupling of Cyclopropanols. Org Lett 2015; 17:2186-9. [PMID: 25885795 DOI: 10.1021/acs.orglett.5b00782] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The first copper-catalyzed ring-opening electrophilic trifluoromethylation and trifluoromethylthiolation of cyclopropanols to form Csp3-CF3 and Csp3-SCF3 bonds have been realized. These transformations are efficient for the synthesis of β-CF3- and β-SCF3-substituted carbonyl compounds that are otherwise challenging to access. The reaction conditions are mild and tolerate a wide range of functional groups. Application to a concise synthesis of LY2409021, a glucagon receptor antagonist that is used in clinical trials for type 2 diabetes mellitus, is reported as well.
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Affiliation(s)
- Yong Li
- †Department of Chemistry and Center for Cancer Research, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Zhishi Ye
- †Department of Chemistry and Center for Cancer Research, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Tabitha M Bellman
- †Department of Chemistry and Center for Cancer Research, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Teng Chi
- ‡Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Mingji Dai
- †Department of Chemistry and Center for Cancer Research, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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30
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Gao B, Zhao Y, Hu J. AgF-Mediated Fluorinative Cross-Coupling of Two Olefins: Facile Access to α-CF3Alkenes and β-CF3Ketones. Angew Chem Int Ed Engl 2014; 54:638-42. [DOI: 10.1002/anie.201409705] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Indexed: 11/11/2022]
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31
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Gao B, Zhao Y, Hu J. AgF-Mediated Fluorinative Cross-Coupling of Two Olefins: Facile Access to α-CF3Alkenes and β-CF3Ketones. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409705] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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