1
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Li MR, Zheng MY, Wang DC, Guo HM. Pd-catalyzed 5- exo-dig cyclization/etherification cascade of N-propargyl arylamines for the synthesis of polysubstituted furans. Chem Commun (Camb) 2024; 60:7721-7724. [PMID: 38967357 DOI: 10.1039/d4cc02255f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
A method for the synthesis of furans bearing indoline skeletons was developed via an intramolecular palladium-catalyzed 5-exo-dig cyclization/etherification cascade of N-propargyl arylamines containing a 1,3-dicarbonyl side chain. This method realized the first capture of vinyl carbopalladiums by ketones as O-nucleophiles and showed a wide range of substrate tolerability affording trisubstituted furans in various yields. The enantioselective version for this domino process and diverse derivatizations of the reaction products were also studied.
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Affiliation(s)
- Meng-Ru Li
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Meng-Yao Zheng
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Dong-Chao Wang
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Hai-Ming Guo
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
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2
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Teng BH, Bao ZP, Zhao Y, Wu XF. Nickel-Catalyzed Four-Component Carbonylation of 1,3-Butadiene To Access β,γ-Unsaturated Ketones. Org Lett 2024; 26:4779-4783. [PMID: 38807481 PMCID: PMC11165585 DOI: 10.1021/acs.orglett.4c01599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/13/2024] [Accepted: 05/16/2024] [Indexed: 05/30/2024]
Abstract
A new strategy to obtain β,γ-unsaturated ketones via the cross-coupling of 1,3-butadiene, alkyl bromides, and arylboronic acids under 1 bar of CO with nickel as the catalyst has been developed. This newly developed four-component carbonylation procedure features advantages including using a cheap catalytic system, high step economy, mild reaction conditions, and excellent 1,4-regioselectivity, thereby providing a sustainable and alternative tool for β,γ-unsaturated ketones production compared to the present tactics. To elucidate the application potential of this method, olefin synthons are derived from the representative coupling product.
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Affiliation(s)
- Bing-Hong Teng
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- School
of Chemistry and Chemical Engineering, Liaoning
Normal University, 850 Huanghe Road, Dalian 116029, China
| | - Zhi-Peng Bao
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- Leibniz-Institut
für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
| | - Yingying Zhao
- School
of Chemistry and Chemical Engineering, Liaoning
Normal University, 850 Huanghe Road, Dalian 116029, China
| | - Xiao-Feng Wu
- Dalian
National Laboratory for Clean Energy, Dalian Institute of Chemical
Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
- Leibniz-Institut
für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany
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3
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Adhikari P, Bhattacharyya D, Deori K, Sarmah BK, Das A. Chemo- and Regioselective Catalytic Cross-Coupling Reaction of Ketones for the Synthesis of β, γ-Disubstituted β, γ-Unsaturated Ketones. Chemistry 2023:e202303206. [PMID: 38140820 DOI: 10.1002/chem.202303206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/09/2023] [Accepted: 12/21/2023] [Indexed: 12/24/2023]
Abstract
C-C bond forming reaction of ketone with aldehyde is well-studied for the synthesis of α, β-unsaturated ketones, however, the reaction with two different ketones to unsaturated carbonyl compound has not yet been systematically studied. Probably due to the relatively low reactivity of ketones as electrophiles (aldol acceptors), its propensity for retro-aldol reaction. The reactions often suffer from unsatisfactory chemoselectivity (self- vs. crossed aldol products) and regioselectivity (thermodynamic vs. kinetic enolate). In this quest, we report here for the first time selective cross-coupling reaction of ketones to β-branched β, γ-unsaturated ketones by using ruthenium catalysis. Interestingly, single crossed aldol condensation products are formed even in reactions where a mixture of products is possible. Reaction is highly chemoselective, regioselective and produces H2 O as the only byproducts making the protocol environmentally benign. Method is compatible with a wide variety of sensitive functional group and applicable for even problematic aliphatic ketones as substrates. Notably, acetone was found as a three-carbon feedstock for the syntheses of simple β, γ-unsaturated ketone compounds. The process can further be extended to the gram-scale reaction and late-stage functionalization of natural products. With the help of DFT calculations, several control experiments, and deuterium-labeling experiments, the mechanistic finding demonstrated that initial aldol-condensation of ketones to a β, β-disubstituted α, β-unsaturated ketone, which further isomerizes to a β, γ- unsaturated ketone via η3 -allyl ruthenium complex.
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Affiliation(s)
- Priyanka Adhikari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Dipanjan Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Kritartha Deori
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
| | - Bikash Kumar Sarmah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
- Department of Chemistry, Sonari College, Assam, India
| | - Animesh Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039
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4
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Zaman MK, Li R, Deng W. Photocatalytic Cross-Coupling of Tetrafluoropyridine Sulfides with Vinyl Halides for the Synthesis of β,γ-Unsaturated Carbonyl Compounds. J Org Chem 2023; 88:15761-15766. [PMID: 37890077 DOI: 10.1021/acs.joc.3c01800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2023]
Abstract
β,γ-Unsaturated carbonyl compounds serve as versatile building blocks in organic synthesis and medicinal chemistry. Herein we reported the synthesis of β,γ-unsaturated carbonyl compounds from tetrafluoropyridine sulfides with vinyl halides. This cross-coupling reaction takes the advantage of photocatalysis, as well as zinc catalysis, which is preferred due to its less-toxic, earth abundant, and cost-effective nature.
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Affiliation(s)
- Muhammad Kashif Zaman
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Ruining Li
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Pharmacy, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
| | - Wei Deng
- Department of Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200125, China
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5
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Wang X, Yang R, Zhu B, Liu Y, Song H, Dong J, Wang Q. Direct allylic acylation via cross-coupling involving cooperative N‑heterocyclic carbene, hydrogen atom transfer, and photoredox catalysis. Nat Commun 2023; 14:2951. [PMID: 37221185 DOI: 10.1038/s41467-023-38743-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/10/2023] [Indexed: 05/25/2023] Open
Abstract
Herein, we report a mild, operationally simple, multicatalytic method for the synthesis of β,γ-unsaturated ketones via allylic acylation of alkenes. Specifically, the method combines N‑heterocyclic carbene catalysis, hydrogen atom transfer catalysis, and photoredox catalysis for cross-coupling reactions between a wide range of feedstock carboxylic acids and readily available olefins to afford structurally diverse β,γ-unsaturated ketones without olefin transposition. The method could be used to install acyl groups on highly functionalized natural-product-derived compounds with no need for substrate pre-activation, and C-H functionalization proceed with excellent site selectivity. To demonstrate the potential applications of the method, we convert a representative coupling product into various useful olefin synthons.
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Affiliation(s)
- Xiaochen Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Rongxin Yang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Binbing Zhu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Jianyang Dong
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 300071, Tianjin, China.
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6
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Williams CG, Nistanaki SK, Wells CW, Nelson HM. α-Vinylation of Ester Equivalents via Main Group Catalysis for the Construction of Quaternary Centers. Org Lett 2023; 25:3591-3595. [PMID: 37192420 DOI: 10.1021/acs.orglett.3c00535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
A methodology for the construction of sterically congested quaternary centers via the trapping of vinyl carbocations with silyl ketene acetals is disclosed. This main group-catalyzed α-vinylation reaction is advantageous as methods to access these congested motifs are limited. Moreover, β,γ-unsaturated carbonyl moieties and tetrasubstituted alkenes are present in various bioactive natural products and pharmaceuticals, and this catalytic platform offers a means of accessing them using simple and inexpensive materials.
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Affiliation(s)
- Chloe G Williams
- Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Sepand K Nistanaki
- Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Conner W Wells
- Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Hosea M Nelson
- Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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7
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Xie J, Zheng Z, Liu X, Zhang N, Choi S, He C, Dong G. Asymmetric Total Synthesis of (+)-Phainanoid A and Biological Evaluation of the Natural Product and Its Synthetic Analogues. J Am Chem Soc 2023; 145:4828-4852. [PMID: 36799470 DOI: 10.1021/jacs.2c13889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Here, we report our detailed efforts toward the synthesis of phainanoids, a novel class of dammarane-type triterpenoids with potent immunosuppressive activities and unique structural features. Systematic model studies have been carried out, and efficient approaches have been established to construct the benzofuranone-based 4,5-spirocycle, the D/E/F tricyclic core, the [4.3.1] propellane, and the 5,5-oxaspirolactone moieties. The asymmetric synthesis of (+)-phainanoid A has been achieved through kinetic resolution of the tricyclic core followed by diastereoselective installation of the A/B/C and G/H rings and fragment coupling with the enantioenriched I/J rings. In addition, novel estrone-derived phainanoid analogues have been prepared. The immunosuppressive and cell survival assays revealed that (+)-phainanoid A and some of its synthetic analogues can specifically inhibit stimulation-induced lymphocyte proliferation but not cell survival at their effective concentrations. Preliminary structure-activity relationship information has been obtained, which could inspire future design of immunosuppressive phainanoid analogues.
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Affiliation(s)
- Jiaxin Xie
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Zhong Zheng
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Xin Liu
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Nan Zhang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Shinyoung Choi
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Chuan He
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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8
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Hui C, Wang Z, Xie Y, Liu J. Contemporary synthesis of bioactive cyclobutane natural products. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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9
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From selective transfer hydrogenation to selective hydrogen auto-transfer process: An efficient method for the synthesis of alkenyl ketones via iridium-catalyzed α-alkylation of ketones with alkenyl alcohols. J Catal 2021. [DOI: 10.1016/j.jcat.2021.08.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Quintavalla A, Veronesi R, Carboni D, Martinelli A, Zaccheroni N, Mummolo L, Lombardo M. Chemodivergent Photocatalytic Synthesis of Dihydrofurans and β,γ‐Unsaturated Ketones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100260] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Arianna Quintavalla
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Ruben Veronesi
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Davide Carboni
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Ada Martinelli
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Nelsi Zaccheroni
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Liviana Mummolo
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
| | - Marco Lombardo
- Alma Mater Studiorum – University of Bologna Department of Chemistry “G. Ciamician” Via Selmi 2 40126 Bologna Italy
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11
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Zhang S, Duan X, Li P. Access to Stereodefined Multifunctionalized β,
γ‐Unsaturated
Ketones
via
Chemo‐, Regio‐ and Diastereoselective
Copper‐Catalyzed
Diborylation of
Cross‐Conjugated
Enynones
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000475] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Shuai Zhang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University Xi'an Shaanxi 710054 China
| | - Xinhua Duan
- School of Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
- Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University Xi'an Shaanxi 710054 China
- State Key Laboratory of Elemento‐Organic Chemistry, Nankai University Tianjin 300071 China
- Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University Xi'an Shaanxi 710049 China
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12
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Li L, Wasik KA, Frost BJ, Geary LM. Silver catalyzed proto- and sila-Nakamura-type α-vinylation of silyl enol ethers with dichloroacetylene. Divergent formation of stereochemically pure tri- and tetrasubstituted olefins. Tetrahedron Lett 2020; 61. [PMID: 32863449 DOI: 10.1016/j.tetlet.2019.151370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The silver-catalyzed reaction of silyl enol ethers with dichloroacetylene (DCA) is described. When DCA was used as a solution in diethyl ether, we found that the silyl group was transferred to the vinyl group, resulting in stereochemically pure tetrasubstituted olefins. However, when DCA was used as a solution in the more polar acetonitrile, protonation was the major pathway, and trisubstituted olefins were the dominant products.
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Affiliation(s)
- Lun Li
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Kimberly A Wasik
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Brian J Frost
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
| | - Laina M Geary
- University of Nevada, Reno, Department of Chemistry, Reno, Nevada, 89557, USA
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13
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Recent Progress in Steroid Synthesis Triggered by the Emergence of New Catalytic Methods. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901466] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Chen J, Guo P, Zhang J, Rong J, Sun W, Jiang Y, Loh T. Synthesis of Functionalized α‐Vinyl Aldehydes from Enaminones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jie Chen
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Pan Guo
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Jianguo Zhang
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Jiaxin Rong
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Wangbin Sun
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Yaojia Jiang
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Teck‐Peng Loh
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637616 Singapore
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15
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Chen J, Guo P, Zhang J, Rong J, Sun W, Jiang Y, Loh T. Synthesis of Functionalized α‐Vinyl Aldehydes from Enaminones. Angew Chem Int Ed Engl 2019; 58:12674-12679. [DOI: 10.1002/anie.201906213] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Jie Chen
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Pan Guo
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Jianguo Zhang
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Jiaxin Rong
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Wangbin Sun
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Yaojia Jiang
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Teck‐Peng Loh
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University Singapore 637616 Singapore
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16
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Zaid Y, Mboyi CD, Drapeau MP, Radal L, Chahdi FO, Rodi YK, Ollevier T, Taillefer M. Transition-Metal-Free α-Vinylation of Enolizable Ketones with β-Bromostyrenes. Org Lett 2019; 21:1564-1568. [PMID: 30801194 DOI: 10.1021/acs.orglett.8b04004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An α-vinylation of enolizable ketones has been developed by using β-bromostyrenes and a KO tBu/NMP system. β,γ-Unsaturated ketones of E configuration were obtained in excellent yield and selectivity. Further synthetic possibilities are highlighted by one-pot functionalization via trapping of intermediate dienolates with alkyl, allyl, benzyl, and propargyl halides to generate quaternary centers. The reported transformation is believed to involve phenylacetylene and propargylic alcohol derivatives.
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Affiliation(s)
- Yassir Zaid
- Laboratoire de Chimie Organique Appliquée , FST Fès BP 2202 , 30000 Fès , Morocco.,CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Clève Dionel Mboyi
- CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Martin Pichette Drapeau
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada.,CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
| | - Léa Radal
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada
| | | | - Youssef Kandri Rodi
- Laboratoire de Chimie Organique Appliquée , FST Fès BP 2202 , 30000 Fès , Morocco
| | - Thierry Ollevier
- Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec (Québec), G1V 0A6 , Canada
| | - Marc Taillefer
- CNRS, UMR 5253, AM2N , Institut Charles Gerhardt Montpellier ENSCM , 8 rue de l'École Normale , F-34296 Montpellier Cedex 5 , France
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17
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Zhang X, Tutkowski B, Oliver A, Helquist P, Wiest O. Mechanistic Study of the Nickel-Catalyzed α,β-Coupling of Saturated Ketones. ACS Catal 2018. [DOI: 10.1021/acscatal.7b04105] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin Zhang
- Laboratory
of Computational Chemistry and Drug Design, Laboratory of Chemical
Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, People’s Republic of China
| | - Brandon Tutkowski
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670, United States
| | - Allen Oliver
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670, United States
| | - Paul Helquist
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670, United States
| | - Olaf Wiest
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556-5670, United States
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18
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Bao M, Lu W, Cai Y, Qiu L, Xu X. Gold(I)-Catalyzed Cyclization/Carbonylation Cascade Reaction of 1,6-Diynes: An Access to β,γ-Unsaturated Ketones. J Org Chem 2017; 82:13386-13395. [PMID: 29161043 DOI: 10.1021/acs.joc.7b02461] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A gold-catalyzed cyclization/carbonylation cascade reaction of 1,6-diynes is reported. The reaction goes through 6-exo-dig and 6-endo-dig cyclizations in sequence, followed by hydration to provide the β,γ-unsaturated ketones with moderate to high yields under mild reaction conditions. This is the first example of intercepting the postulated 1,3-oxazine vinylgold intermediate with another pendant alkyne, which not only verifies the proposed mechanism but also provides the ketone products with cyclized 1,2,3,6-tetrahydropyridine or 3,6-dihydro-2H-pyran frameworks from corresponding diynes.
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Affiliation(s)
- Ming Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Wei Lu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Yanping Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
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19
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Medina JM, Moreno J, Racine S, Du S, Garg NK. Mizoroki-Heck Cyclizations of Amide Derivatives for the Introduction of Quaternary Centers. Angew Chem Int Ed Engl 2017; 56:6567-6571. [PMID: 28467029 PMCID: PMC5669036 DOI: 10.1002/anie.201703174] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Indexed: 12/26/2022]
Abstract
We report non-decarbonylative Mizoroki-Heck reactions of amide derivatives. The transformation relies on the use of nickel catalysis and proceeds using sterically hindered tri- and tetrasubstituted olefins to give products containing quaternary centers. The resulting polycyclic or spirocyclic products can be obtained in good yields. Moreover, a diastereoselective variant of this method gives access to an adduct bearing vicinal, highly substituted sp3 stereocenters. These results demonstrate that amide derivatives can be used as building blocks for the assembly of complex scaffolds.
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Affiliation(s)
- Jose M Medina
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jesus Moreno
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Sophie Racine
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Shuaijing Du
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Neil K Garg
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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20
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Xie J, Wang J, Dong G. Synthetic Study of Phainanoids. Highly Diastereoselective Construction of the 4,5-Spirocycle via Palladium-Catalyzed Intramolecular Alkenylation. Org Lett 2017; 19:3017-3020. [DOI: 10.1021/acs.orglett.7b01303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiaxin Xie
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Jianchun Wang
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
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21
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Medina JM, Moreno J, Racine S, Du S, Garg NK. Mizoroki–Heck Cyclizations of Amide Derivatives for the Introduction of Quaternary Centers. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703174] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jose M. Medina
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Jesus Moreno
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Sophie Racine
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Shuaijing Du
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
| | - Neil K. Garg
- Department of Chemistry and Biochemistry University of California, Los Angeles Los Angeles CA 90095 USA
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22
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Transition-metal-free chemo- and regioselective vinylation of azaallyls. Nat Chem 2017; 9:997-1004. [PMID: 28937664 DOI: 10.1038/nchem.2760] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 03/01/2017] [Indexed: 11/08/2022]
Abstract
Direct C(sp3)-C(sp2) bond formation under transition-metal-free conditions offers an atom-economical, inexpensive and environmentally benign alternative to traditional transition-metal-catalysed cross-coupling reactions. A new chemo- and regioselective coupling protocol between 3-aryl-substituted-1,1-diphenyl-2-azaallyl derivatives and vinyl bromides has been developed. This is the first transition-metal-free cross-coupling of azaallyls with vinyl bromide electrophiles and delivers allylic amines in excellent yields (up to 99%). This relatively simple and mild protocol offers a direct and practical strategy for the synthesis of high-value allylic amine building blocks that does not require the use of transition metals, special initiators or photoredox catalysts. Radical clock experiments, electron paramagnetic resonance studies and density functional theory calculations point to an unprecedented substrate-dependent coupling mechanism. Furthermore, an electron paramagnetic resonance signal was observed when the N-benzyl benzophenone ketimine was subjected to silylamide base, supporting the formation of radical species upon deprotonation. The unique mechanisms outlined herein could pave the way for new approaches to transition-metal-free C-C bond formations.
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23
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Wu Y, Fu WC, Chiang CW, Choy PY, Kwong FY, Lei A. Palladium-catalysed mono-α-alkenylation of ketones with alkenyl tosylates. Chem Commun (Camb) 2017; 53:952-955. [DOI: 10.1039/c6cc08392g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first general Pd-catalysed mono-α-alkenylation of ketones using alkenyl tosylates is reported. The combination of Pd(dba)2 and XPhos as the catalytic system exhibited excellent chemo- and monoselectivity at a relatively low catalyst loading (0.1–1.0 mol%).
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Affiliation(s)
- Yong Wu
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Wai Chung Fu
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- Kowloon
- China
| | - Chien-Wei Chiang
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Pui Ying Choy
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- Kowloon
- China
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- Kowloon
- China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences
- The Institute for Advanced Studies (IAS)
- Wuhan University
- Wuhan 430072
- P. R. China
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24
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Grigalunas M, Wiest O, Helquist P. Single-Flask Multicomponent Synthesis of Highly Substituted α-Pyrones via a Sequential Enolate Arylation and Alkenylation Strategy. Org Lett 2016; 18:5724-5727. [PMID: 27768319 DOI: 10.1021/acs.orglett.6b02969] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Trisubstituted α-pyrones are obtained by a Pd-catalyzed three-component, single-flask operation via an α-arylation, subsequent α-alkenylation, alkene isomerization, and dienolate lactonization. A variety of coupling components under mild conditions afforded isolated yields of up to 93% of the pyrones with complete control of regioselectivity. Metal dependence was noted for three of the steps of the pathway. Utility of the pyrone products was demonstrated by further transformations providing convenient access to polyaromatic compounds, exhibiting broad molecular diversity.
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Affiliation(s)
- Michael Grigalunas
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46566, United States
| | - Olaf Wiest
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46566, United States.,Lab of Computational Chemistry and Drug Design, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School , Shenzhen 518055, China
| | - Paul Helquist
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46566, United States
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25
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Holmbo SD, Godfrey NA, Hirner JJ, Pronin SV. A Catalytic Intermolecular Formal Ene Reaction between Ketone-Derived Silyl Enol Ethers and Alkynes. J Am Chem Soc 2016; 138:12316-9. [PMID: 27626462 DOI: 10.1021/jacs.6b06847] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A catalytic formal ene reaction between ketone-derived silyl enol ethers and terminal alkynes is described. This transformation is uniquely capable of bimolecular assembly of 2-siloxy-1,4-dienes and can be used to access β,γ-unsaturated ketones containing quaternary carbons in the α-position.
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Affiliation(s)
- Stephen D Holmbo
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Nicole A Godfrey
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Joshua J Hirner
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
| | - Sergey V Pronin
- Department of Chemistry, University of California , Irvine, California 92697-2025, United States
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26
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Chen T, Ren H, Zhang M, Zhang AQ. Investigation on Palladium-Catalysed α-Oxidation of Aromatic Ketones. JOURNAL OF CHEMICAL RESEARCH 2016. [DOI: 10.3184/174751916x14655713299386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A variety of 2-(2-methylphenyl)-2-oxoethyl acetates were prepared from aromatic ketones by α-oxidation in acetic acid, using palladium acetate as catalyst and (diacetoxyiodo)benzene as oxidant. The X-ray crystal structure of 5-acetyl-2-hydroxy-4-methylphenyl acetate was determined.
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Affiliation(s)
- Tianbao Chen
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Hexiang Ren
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Ming Zhang
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Ai Qin Zhang
- Department of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, P.R. China
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27
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Yang X, Kim BS, Li M, Walsh PJ. Palladium-Catalyzed Selective α-Alkenylation of Pyridylmethyl Ethers with Vinyl Bromides. Org Lett 2016; 18:2371-4. [PMID: 27160421 DOI: 10.1021/acs.orglett.6b00815] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient palladium-catalyzed α-alkenylation of pyridylmethyl ethers with vinyl bromides is presented. A Pd/NIXANTPHOS-based catalyst system enables a mild and chemoselective coupling between a variety of pyridylmethyl ethers and vinyl bromides in good to excellent yields. Under the mild conditions, β,γ-unsaturated products are obtained without isomerization or Heck byproducts observed.
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Affiliation(s)
- Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology, Yunnan University , Kunming, 650091, P. R. China.,Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Byeong-Seon Kim
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Minyan Li
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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28
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Nucleophilic β-alkenylation of N-alkoxyenamines: an umpolung strategy for the preparation of β,γ-unsaturated ketones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.04.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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29
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Qiu C, Yao K, Zhang X, Gong H. Ni-catalyzed reductive coupling of α-halocarbonyl derivatives with vinyl bromides. Org Biomol Chem 2016; 14:11332-11335. [DOI: 10.1039/c6ob02269c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This work describes the vinylation of α-halo carbonyl compounds with vinyl bromides under Ni-catalyzed reductive coupling conditions. While aryl-conjugated vinyl bromides entail pyridine as the sole labile ligand, the alkyl-substituted vinyl bromides require both bipyridine and pyridine as the co-ligands.
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Affiliation(s)
- Canbin Qiu
- Center for Supramolecular Chemistry and Catalysis
- and Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
| | - Ken Yao
- Center for Supramolecular Chemistry and Catalysis
- and Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
| | - Xinghua Zhang
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Hegui Gong
- Center for Supramolecular Chemistry and Catalysis
- and Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
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30
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Grigalunas M, Norrby PO, Wiest O, Helquist P. Single-Flask Multicomponent Palladium-Catalyzed α,γ-Coupling of Ketone Enolates: Facile Preparation of Complex Carbon Scaffolds. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505895] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Grigalunas M, Norrby PO, Wiest O, Helquist P. Single-Flask Multicomponent Palladium-Catalyzed α,γ-Coupling of Ketone Enolates: Facile Preparation of Complex Carbon Scaffolds. Angew Chem Int Ed Engl 2015; 54:11822-5. [PMID: 26276904 DOI: 10.1002/anie.201505895] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 12/21/2022]
Abstract
A three-component palladium-catalyzed reaction sequence has been developed in which γ-substituted α,β-unsaturated products are obtained in a single flask by an α-alkenylation with either a subsequent γ-alkenylation or γ-arylation of a ketone enolate. Coupling of a variety of electronically and structurally different components was achieved in the presence of a Pd/Q-Phos catalyst (2 mol %), usually at 22 °C with yields of up to 85 %. Most importantly, access to these products is obtained in one simple operation in place of employing multiple reactions.
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Affiliation(s)
- Michael Grigalunas
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556 (USA)
| | - Per-Ola Norrby
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556 (USA).,Pharmaceutical Development, Global Medicines Development, AstraZeneca, 43183 Mölndal (Sweden)
| | - Olaf Wiest
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556 (USA).,Lab of Computational Chemistry and Drug Design, School of Chemical Biology and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen 518055 (China)
| | - Paul Helquist
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556 (USA).
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32
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Hardegger LA, Habegger J, Donohoe TJ. Modular Synthesis of Highly Substituted Pyridines via Enolate α-Alkenylation. Org Lett 2015; 17:3222-5. [DOI: 10.1021/acs.orglett.5b01312] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leo A. Hardegger
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - Jacqueline Habegger
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
| | - Timothy J. Donohoe
- Department of Chemistry,
Chemistry Research Laboratory, University of Oxford, Mansfield
Road, Oxford, OX1 3TA, U.K
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33
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Tutkowski BM, Grigalunas M, Wiest O, Helquist P. A nickel-catalyzed α,β-coupling of saturated ketones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Grigalunas M, Ankner T, Norrby PO, Wiest O, Helquist P. Ni-Catalyzed Alkenylation of Ketone Enolates under Mild Conditions: Catalyst Identification and Optimization. J Am Chem Soc 2015; 137:7019-22. [DOI: 10.1021/jacs.5b02945] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael Grigalunas
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Tobias Ankner
- Department
of Biochemistry and Organic Chemistry, Uppsala University, Box 576 BMC, SE-751 23 Uppsala, Sweden
| | - Per-Ola Norrby
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Pharmaceutical
Development, Global Medicines Development, AstraZeneca, Pepparedsleden
1, SE-431 83 Mölndal, Sweden
| | - Olaf Wiest
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Lab
of Computational Chemistry and Drug Design, School of Chemical Biology
and Biotechnology, Peking University, Shenzhen Graduate School, Shenzhen 518055, China
| | - Paul Helquist
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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