1
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Vinylogous Michael addition of nitroalkylideneoxindoles to isatylidene-malononitriles in the regio- and diastereoselective synthesis of dispirocyclopentylbisoxindoles. J CHEM SCI 2023. [DOI: 10.1007/s12039-022-02122-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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2
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Xu JX, Jiang YS, Chen CH, Sathishkumar N, Chu KT, Chiang MH, Chen HT, Han JL. Enantioselective Organocatalytic Three-Component Vinylogous Michael/Aldol Tandem Reaction among 3-Alkylidene oxindoles, Methyleneindolinones, and Aldehydes. J Org Chem 2021; 87:197-210. [PMID: 34882415 DOI: 10.1021/acs.joc.1c02180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We reported a one-pot enantioselective three-component vinylogous Michael/aldol tandem reaction of prochiral 3-alkylidene oxindoles with methyleneindolinones and aldehydes using bifunctional organocatalysts. A variety of enantioenriched 3,3-disubstituted oxindoles 3 and spirolactones 4 were generated in moderate yields (up to 78%) with high stereoselectivities (up to >20:1 dr, >99% ee). Intriguingly, we observed that the aldol reaction with paraformaldehyde generates 3,3-disubstituted oxindoles 3 bearing a hydroxymethyl group, while the reaction with aliphatic aldehydes generates spirolactones 4.
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Affiliation(s)
- Jing-Xiang Xu
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan R.O.C
| | - Yi-Syun Jiang
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan R.O.C
| | - Chih-Hao Chen
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan R.O.C
| | - Nadaraj Sathishkumar
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan R.O.C
| | - Kai-Ti Chu
- Institute of Chemistry, Academia Sinica, Taipei City 11529, Taiwan R.O.C
| | - Ming-Hsi Chiang
- Institute of Chemistry, Academia Sinica, Taipei City 11529, Taiwan R.O.C
| | - Hsin-Tsung Chen
- Department of Chemistry, Chung Yuan Christian University, Taoyuan City 32023, Taiwan R.O.C
| | - Jeng-Liang Han
- Department of Chemistry, National Chung Hsing University, Taichung City 40227, Taiwan R.O.C
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3
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López R, Palomo C. N,N-Diacylaminals as Emerging Tools in Synthesis: From Peptidomimetics to Asymmetric Catalysis. Chemistry 2021; 27:20-29. [PMID: 32667706 DOI: 10.1002/chem.202002637] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/12/2020] [Indexed: 12/26/2022]
Abstract
N,N-Diacylaminals are flexible molecular scaffolds that have commonly been utilized as amide surrogates in peptidomimetics. The singularities of this motif as an N-acyl imine equivalent and as hydrogen-bond donor have recently opened new synthetic opportunities, especially in the field of asymmetric catalysis. This concept article highlights this diverse synthetic potential and provides the elements necessary for further developments.
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Affiliation(s)
- Rosa López
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV/EHU), Manuel de Lardizabal 3, 20018, San Sebastián, Spain
| | - Claudio Palomo
- Departamento de Química Orgánica I, Facultad de Química, Universidad del País Vasco (UPV/EHU), Manuel de Lardizabal 3, 20018, San Sebastián, Spain
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4
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Yao Z, Liu X, Li Z, Xu S, Xu L, Liu X. Dienolate‐Mediated, Regioselective C2‐Polarity Reversal of Chromone‐Based Reactants and Their Application in Nucleophilic Strategies. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000942] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhen Yao
- Department of Chemistry Renmin University of China Beijing 100872 People's Republic of China
| | - Xiong‐Wei Liu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Zheng Li
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Sheng‐Wen Xu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 People's Republic of China
| | - Xiong‐Li Liu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
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5
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Curti C, Battistini L, Sartori A, Zanardi F. New Developments of the Principle of Vinylogy as Applied to π-Extended Enolate-Type Donor Systems. Chem Rev 2020; 120:2448-2612. [PMID: 32040305 PMCID: PMC7993750 DOI: 10.1021/acs.chemrev.9b00481] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Indexed: 12/19/2022]
Abstract
The principle of vinylogy states that the electronic effects of a functional group in a molecule are possibly transmitted to a distal position through interposed conjugated multiple bonds. As an emblematic case, the nucleophilic character of a π-extended enolate-type chain system may be relayed from the legitimate α-site to the vinylogous γ, ε, ..., ω remote carbon sites along the chain, provided that suitable HOMO-raising strategies are adopted to transform the unsaturated pronucleophilic precursors into the reactive polyenolate species. On the other hand, when "unnatural" carbonyl ipso-sites are activated as nucleophiles (umpolung), vinylogation extends the nucleophilic character to "unnatural" β, δ, ... remote sites. Merging the principle of vinylogy with activation modalities and concepts such as iminium ion/enamine organocatalysis, NHC-organocatalysis, cooperative organo/metal catalysis, bifunctional organocatalysis, dicyanoalkylidene activation, and organocascade reactions represents an impressive step forward for all vinylogous transformations. This review article celebrates this evolutionary progress, by collecting, comparing, and critically describing the achievements made over the nine year period 2010-2018, in the generation of vinylogous enolate-type donor substrates and their use in chemical synthesis.
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Affiliation(s)
| | | | | | - Franca Zanardi
- Dipartimento di Scienze degli
Alimenti e del Farmaco, Università
di Parma, Parco Area delle Scienze 27A, 43124 Parma, Italy
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6
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Zha T, Tong X, Deng Y, Peng F, Shao Z. Catalytic Asymmetric and Divergent Synthesis of Tricyclic and Tetracyclic Spirooxindoles: Controllable Site-Selective Electrophilic Halocyclization of 1,6-Enynes. Org Lett 2019; 21:6068-6073. [PMID: 31318558 DOI: 10.1021/acs.orglett.9b02202] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Catalytic asymmetric and divergent assembly of tricyclic and tetracyclic 3,3'-pyrrolidonyl spirooxindoles was developed, involving a one-pot chiral Brønsted base catalyzed asymmetric propargylation for the synthesis of oxindole 1,6-enynes and a subsequent switchable site-selective and highly diastereoselective electrophilic iodocyclization of 1,6-enynes. In addition, antitumor properties of the newly synthesized compounds were evaluated.
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Affiliation(s)
- Taochun Zha
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
| | - Xinyu Tong
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
| | - Yuhua Deng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
| | - Fangzhi Peng
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
| | - Zhihui Shao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, School of Chemical Science and Technology , Yunnan University , Kunming 650091 , China
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7
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Hajra S, Roy S, Saleh SKA. Domino Corey–Chaykovsky Reaction for One-Pot Access to Spirocyclopropyl Oxindoles. Org Lett 2018; 20:4540-4544. [DOI: 10.1021/acs.orglett.8b01840] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences, Campus Raebareli Road, Lucknow 226014, India
| | - Sayan Roy
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences, Campus Raebareli Road, Lucknow 226014, India
| | - SK Abu Saleh
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences, Campus Raebareli Road, Lucknow 226014, India
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8
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Kumar K, Jaiswal MK, Singh RP. Asymmetric Vinylogous Aldol Reaction ofα-ketoesters with 3-alkylidene oxindoles. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700758] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Krishna Kumar
- Department of Chemistry; Indian Institute of Technology, Delhi, Hauz Khas; New Delhi - 110 016 India
| | - Manish K. Jaiswal
- Department of Chemistry; Indian Institute of Technology, Delhi, Hauz Khas; New Delhi - 110 016 India
| | - Ravi P. Singh
- Department of Chemistry; Indian Institute of Technology, Delhi, Hauz Khas; New Delhi - 110 016 India
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9
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Brønsted acid-catalyzed aza-Mannich reaction of N-Boc aminals: access to multifunctional rhodanine/hydantoin derivatives. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2892-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Zhan G, Shi ML, Lin WJ, Ouyang Q, Du W, Chen YC. Direct Asymmetric Aza-Vinylogous-Type Michael Additions of Nitrones from Isatins to Nitroalkenes. Chemistry 2017; 23:6286-6289. [PMID: 28337796 DOI: 10.1002/chem.201701290] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Gu Zhan
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Ming-Lin Shi
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Wei-Jia Lin
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Qin Ouyang
- College of Pharmacy; Third Military Medical University; Chongqing 400038 P. R. China
| | - Wei Du
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
| | - Ying-Chun Chen
- Department of Medicinal Chemistry; West China School of Pharmacy; Sichuan University; Chengdu 610041 P. R. China
- College of Pharmacy; Third Military Medical University; Chongqing 400038 P. R. China
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11
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Noroozi Pesyan N, Rashidnejad H. Decades of synthesis and application of spiro cyclopropanes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1086-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Jadhav AP, Ali A, Singh RP. Vinylogous Nucleophilic Substitution of the Hydroxy Group in Diarylmethanols with 3-Propenyl-2-silyloxyindoles: Towards the Synthesis of α
-Alkylidene-δ
-diaryl-2-oxindoles. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601265] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Amol P. Jadhav
- Department of Chemistry; Indian Institute of Technology, Delhi; Hauz Khas, New Delhi - 110 016 India
| | - Amjad Ali
- Department of Chemistry; Indian Institute of Technology, Delhi; Hauz Khas, New Delhi - 110 016 India
| | - Ravi P. Singh
- Department of Chemistry; Indian Institute of Technology, Delhi; Hauz Khas, New Delhi - 110 016 India
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13
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Sahu S, Banerjee A, Maji MS. Transition-Metal-Free Redox-Neutral One-Pot C3-Alkenylation of Indoles Using Aldehydes. Org Lett 2017; 19:464-467. [DOI: 10.1021/acs.orglett.6b03612] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samrat Sahu
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ankush Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Modhu Sudan Maji
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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14
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Peng C, Zhai J, Xue M, Xu F. Lanthanide amide-catalyzed one-pot functionalization of isatins: synthesis of spiro[cyclopropan-1,3′-oxindoles] and 2-oxoindolin-3-yl phosphates. Org Biomol Chem 2017; 15:3968-3974. [DOI: 10.1039/c7ob00640c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A lanthanide-catalyzed one-pot reaction using readily accessible substrates was developed affording spiro[cyclopropan-1,3′-oxindoles] in good yields and with high stereoselectivity.
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Affiliation(s)
- Cheng Peng
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- P. R. China
| | - Jiaojiao Zhai
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- P. R. China
| | - Mingqiang Xue
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- P. R. China
| | - Fan Xu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- P. R. China
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15
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Reddy MD, Fronczek FR, Watkins EB. Rh-Catalyzed, Regioselective, C–H Bond Functionalization: Access to Quinoline-Branched Amines and Dimers. Org Lett 2016; 18:5620-5623. [DOI: 10.1021/acs.orglett.6b02848] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- M. Damoder Reddy
- Department
of Pharmaceutical Sciences, School of Pharmacy, Union University, 1050
Union University Drive, Jackson, Tennessee 38305, United States
| | - Frank R. Fronczek
- Department
of Chemistry, Louisiana State University, 608 Choppin Hall, Baton Rouge, Louisiana 70803, United States
| | - E. Blake Watkins
- Department
of Pharmaceutical Sciences, School of Pharmacy, Union University, 1050
Union University Drive, Jackson, Tennessee 38305, United States
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16
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Marcantoni E, Petrini M. Recent Developments in the Stereoselective Synthesis of Nitrogen-Containing Heterocycles usingN-Acylimines as Reactive Substrates. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600644] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Enrico Marcantoni
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
| | - Marino Petrini
- School of Science and Technology; Chemistry Division; Università di Camerino; via S. Agostino 1 62032 Camerino Italy
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17
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N-Boc-aminals as easily accessible precursors for less accessible N-Boc-imines: facile synthesis of optically active propargylamine derivatives using Mannich-type reactions. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.03.076] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Loh CCJ, Schmid M, Peters B, Fang X, Lautens M. Exploiting Distal Reactivity of Coumarins: A Rhodium-Catalyzed Vinylogous Asymmetric Ring-Opening Reaction. Angew Chem Int Ed Engl 2016; 55:4600-4. [DOI: 10.1002/anie.201600654] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Charles C. J. Loh
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Matthias Schmid
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Brendan Peters
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Xiang Fang
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
- Laboratory for Advanced Material and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Mark Lautens
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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19
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Loh CCJ, Schmid M, Peters B, Fang X, Lautens M. Exploiting Distal Reactivity of Coumarins: A Rhodium-Catalyzed Vinylogous Asymmetric Ring-Opening Reaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600654] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Charles C. J. Loh
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Matthias Schmid
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Brendan Peters
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
| | - Xiang Fang
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
- Laboratory for Advanced Material and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Mark Lautens
- Department of Chemistry; Davenport Chemical Laboratories, University of Toronto; 80 St. George Street Toronto Ontario M5S 3H6 Canada
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20
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Shen MH, Xu K, Sun CH, Xu HD. Facile synthesis of aza-spirocyclopropanyl oxindoles by the reaction of 3-(2-bromoethyl)-indole with 2,3-dimethylimidazole-1-sulfonyl azide triflate. Org Biomol Chem 2016; 14:1272-6. [DOI: 10.1039/c5ob02192h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-(2-Bromoethyl)indole reacts with 2,3-dimethylimidazole-1-sulfonyl azide triflate and then with an alcohol or amine to afford the corresponding aza-spirooxindole sulfonate and sulfonamide.
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Affiliation(s)
- Mei-Hua Shen
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou
- China
| | - Ke Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou
- China
| | - Chu-Han Sun
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou
- China
| | - Hua-Dong Xu
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou
- China
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21
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Wade Downey C, Ingersoll JA, Glist HM, Dombrowski CM, Barnett AT. One-Pot Silyl Ketene Acetal-Formation Mukaiyama-Mannich Additions to Imines Mediated by Trimethylsilyl Trifluoromethanesulfonate. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500958] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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23
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Monari M, Montroni E, Nitti A, Lombardo M, Trombini C, Quintavalla A. Highly stereoselective [4+2] and [3+2] spiroannulations of 2-(2-oxoindolin-3-ylidene)acetic esters catalyzed by bifunctional thioureas. Chemistry 2015; 21:11038-49. [PMID: 26032428 DOI: 10.1002/chem.201500676] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Indexed: 11/11/2022]
Abstract
A new Michael-Michael cascade reaction between 2-(2-oxoindolin-3-ylidene)acetic esters 1 and nitroenoates 2, catalyzed by bifunctional thioureas, is investigated. The combination of the two Michael reactions results in a novel and facile [4+2] or [3+2] spiroannulation process, which is characterized by the following features: 1) two carbon-carbon bonds and four stereocenters, including a quaternary spiro carbon, are formed under mild conditions; 2) an unprecedented and stereochemically defined substitution pattern on the spirocarbocyclic unit is obtained; 3) the double-bond configuration of the donor-acceptor nitroenoate 2 determines the absolute configuration of the spiro center, whereas the remaining stereocenters are formed under control of the catalyst. The effect on the final stereochemical outcome of structural variations of each starting material, catalyst, and experimental conditions is analyzed in detail. In particular, the use of specifically designed chiral nitroenoates enables diverse polyfunctional spirocyclohexane derivatives containing six consecutive stereogenic centers to be constructed. To our knowledge, this is the first asymmetric organocatalytic strategy enabling both five- and six-membered β-nitro spirocarbocyclic oxindoles.
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Affiliation(s)
- Magda Monari
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Elisa Montroni
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Andrea Nitti
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Marco Lombardo
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Claudio Trombini
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy)
| | - Arianna Quintavalla
- Alma Mater Studiorum, University of Bologna, Via Selmi 2, 40126 Bologna (Italy).
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24
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Curti C, Sartori A, Battistini L, Brindani N, Rassu G, Pelosi G, Lodola A, Mor M, Casiraghi G, Zanardi F. Pushing the boundaries of vinylogous reactivity: catalytic enantioselective mukaiyama aldol reactions of highly unsaturated 2-silyloxyindoles. Chemistry 2015; 21:6433-42. [PMID: 25735832 DOI: 10.1002/chem.201500083] [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: 01/08/2015] [Indexed: 11/11/2022]
Abstract
The first example of catalytic, enantioselective hypervinylogous Mukaiyama aldol reaction (HVMAR) involving multiply unsaturated 2-silyloxyindoles is reported. The reaction utilizes a chiral Lewis base-catalyzed Lewis acid-mediated technology to deliver homoallylic 3-polyenylidene 2-oxindoles with extraordinary levels of regio-, enantio-, and geometrical selectivity. This work highlights a subtle yet decisive influence of the indole N-substituents on the propagation of the vinylogous reactivity space of the donor substrates up to ten bonds away from the origin of the vinylogy effect. Analysis of the (13) C NMR chemical shifts of the C-ω remote site within homologous silyloxyindole donors enabled rationalization of the results and easy qualitative prediction of the HVMAR reactivity/inertia toward a given aldehyde acceptor.
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Affiliation(s)
- Claudio Curti
- Dipartimento di Farmacia, Università degli Studi di Parma, Parco Area delle Scienze 27 A, 43124 Parma (Italy), Fax: (+39) 0521-905006.
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25
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Moon HR, Kim KH, Lee J, Kim JN. Synthesis of 3-(γ,δ-Disubstituted)allylidene-2-Oxindoles from Isatins by Wittig Reaction with Morita-Baylis-Hillman Bromides. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hye Ran Moon
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Ko Hoon Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Junseong Lee
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jae Nyoung Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
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26
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Feng J, Li X, Cheng JP. An asymmetric allylic alkylation reaction of 3-alkylidene oxindoles. Chem Commun (Camb) 2015; 51:14342-5. [DOI: 10.1039/c5cc06182b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient asymmetric allylic alkylation reaction with respect to 3-alkylidene oxindoles and racemic MBH carbonate has been achieved.
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Affiliation(s)
- Junjun Feng
- State Key Laboratory of Elemento-Organic Chemistry
- Department of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry
- Department of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Jin-Pei Cheng
- Collaborative Innovation Center of Chemical Science and Engineering
- Tianjin 300071
- China
- Center of Basic Molecular Science
- Department of Chemistry
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27
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Zhong Y, Ma S, Xu Z, Chang M, Wang R. Organocatalytic asymmetric vinylogous Michael addition of 3-alkylidene oxindoles to α-substituted β-nitroacrylates: facile construction of a chiral all-carbon quaternary center. RSC Adv 2014. [DOI: 10.1039/c4ra09128k] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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28
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Lee HJ, Lee S, Yu J, Kim JN. Vinylogous N,N-dimethylaminomethylenation of 3-[(1-substituted)ethylidene]-oxindoles with N,N-dimethylformamide dimethylacetal. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.130] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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