1
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Suzuki H, Sekino K, Kondo S, Minamikawa R, Matsuda T. Modular synthesis of 3,3-disubstituted oxindoles from nitrones and acrylic acids. Org Biomol Chem 2024. [PMID: 39034769 DOI: 10.1039/d4ob00964a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
We developed a modular synthesis for 3,3-disubstituted oxindoles, utilising readily accessible nitrones and acrylic acids. This approach facilitates the preparation of a diverse array of oxindoles through the variation of the starting materials. We demonstrated the applicability of this method through a gram-scale reaction and a synthesis of esermethole.
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Affiliation(s)
- Hirotsugu Suzuki
- Tenure-Track Program for Innovative Research, University of Fukui, 3-9-1 Bunkyo, Fukui-shi, Fukui 910-8507, Japan.
| | - Kaisei Sekino
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Sora Kondo
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Ryo Minamikawa
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
| | - Takanori Matsuda
- Department of Applied Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
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2
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Kumar R, Dohi T, Zhdankin VV. Organohypervalent heterocycles. Chem Soc Rev 2024; 53:4786-4827. [PMID: 38545658 DOI: 10.1039/d2cs01055k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
This review summarizes the structural and synthetic aspects of heterocyclic molecules incorporating an atom of a hypervalent main-group element. The term "hypervalent" has been suggested for derivatives of main-group elements with more than eight valence electrons, and the concept of hypervalency is commonly used despite some criticism from theoretical chemists. The significantly higher thermal stability of hypervalent heterocycles compared to their acyclic analogs adds special features to their chemistry, particularly for bromine and iodine. Heterocyclic compounds of elements with double bonds are not categorized as hypervalent molecules owing to the zwitterionic nature of these bonds, resulting in the conventional 8-electron species. This review is focused on hypervalent heterocyclic derivatives of nonmetal main-group elements, such as boron, silicon, nitrogen, carbon, phosphorus, sulfur, selenium, bromine, chlorine, iodine(III) and iodine(V).
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Affiliation(s)
- Ravi Kumar
- Department of Chemistry, J C Bose University of Science and Technology, YMCA, NH-2, Sector-6, Mathura Road, Faridabad, 121006, Haryana, India.
| | - Toshifumi Dohi
- Graduate School of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga, 525-8577, Japan.
| | - Viktor V Zhdankin
- Department of Chemistry and Biochemistry, 1038 University Drive, 126 HCAMS University of Minnesota Duluth, Duluth, Minnesota 55812, USA.
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3
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Aryl-, Akynyl-, and Alkenylbenziodoxoles: Synthesis and Synthetic Applications. Molecules 2023; 28:molecules28052136. [PMID: 36903382 PMCID: PMC10004369 DOI: 10.3390/molecules28052136] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/19/2023] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
Hypervalent iodine reagents are in high current demand due to their exceptional reactivity in oxidative transformations, as well as in diverse umpolung functionalization reactions. Cyclic hypervalent iodine compounds, known under the general name of benziodoxoles, possess improved thermal stability and synthetic versatility in comparison with their acyclic analogs. Aryl-, alkenyl-, and alkynylbenziodoxoles have recently received wide synthetic applications as efficient reagents for direct arylation, alkenylation, and alkynylation under mild reaction conditions, including transition metal-free conditions as well as photoredox and transition metal catalysis. Using these reagents, a plethora of valuable, hard-to-reach, and structurally diverse complex products can be synthesized by convenient procedures. The review covers the main aspects of the chemistry of benziodoxole-based aryl-, alkynyl-, and alkenyl- transfer reagents, including preparation and synthetic applications.
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4
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Le Du E, Waser J. Recent progress in alkynylation with hypervalent iodine reagents. Chem Commun (Camb) 2023; 59:1589-1604. [PMID: 36656618 PMCID: PMC9904279 DOI: 10.1039/d2cc06168f] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 12/23/2022] [Indexed: 01/20/2023]
Abstract
Although alkynes are one of the smallest functional groups, they are among the most versatile building blocks for organic chemistry, with applications ranging from biochemistry to material sciences. Alkynylation reactions have traditionally relied on the use of acetylenes as nucleophiles. The discovery and development of ethynyl hypervalent iodine reagents have allowed to greatly expand the transfer of alkynes as electrophilic synthons. In this feature article the progress in the field since 2018 will be presented. After a short introduction on alkynylation reactions and hypervalent iodine reagents, the developments in the synthesis of alkynyl hypervalent iodine reagents will be discussed. Their recent use in base-mediated and transition-metal catalyzed alkynylations will be described. Progress in radical-based alkynylations and atom-economical transformations will then be presented.
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Affiliation(s)
- Eliott Le Du
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne EPFL, SB ISIC, LCSO, BCH 4306, 1015, Lausanne, Switzerland.
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne EPFL, SB ISIC, LCSO, BCH 4306, 1015, Lausanne, Switzerland.
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5
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Ahmed N, Spears RJ, Sheppard TD, Chudasama V. Functionalisation of ethereal-based saturated heterocycles with concomitant aerobic C–H activation and C–C bond formation. Chem Sci 2022; 13:8626-8633. [PMID: 35974756 PMCID: PMC9337743 DOI: 10.1039/d2sc01626e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/24/2022] [Indexed: 11/21/2022] Open
Abstract
Herein we disclose a novel method for the aerobic C–H activation of ethereal-based heterocycles to generate various α-functionalised building blocks.
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Affiliation(s)
- Nehaal Ahmed
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Richard J. Spears
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Tom D. Sheppard
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
| | - Vijay Chudasama
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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6
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Pastor M, Vayer M, Weinstabl H, Maulide N. Electrochemical Umpolung C-H Functionalization of Oxindoles. J Org Chem 2021; 87:606-612. [PMID: 34962127 PMCID: PMC8749966 DOI: 10.1021/acs.joc.1c02616] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
![]()
Herein, we present
a general electrochemical method to access unsymmetrical
3,3-disubstituted oxindoles by direct C–H functionalization
where the oxindole fragment behaves as an electrophile. This Umpolung
approach does not rely on stoichiometric oxidants and proceeds under
mild, environmentally benign conditions. Importantly, it enables the
functionalization of these scaffolds through C–O, and by extension
to C–C or even C–N bond formation.
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Affiliation(s)
- Miryam Pastor
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Marie Vayer
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
| | - Harald Weinstabl
- Boehringer-Ingelheim RCV, Doktor-Boehringer-Gasse 5-11, 1120 Vienna, Austria
| | - Nuno Maulide
- Christian Doppler Laboratory for Entropy-Oriented Drug Design, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
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7
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Maity A, Munda M, Niyogi S, Kumar N, Bisai A. Total syntheses of Hexahydropyrrolo[2,3-b]indole Alkaloids, (+)-pseudophrynamine 270 and (+)-pseudophrynamine 272A. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Yu X, Zhang T, Liu J, Li X. Recent Advances in the Construction of Quaternary Stereocenters via Palladium-Catalyzed Decarboxylative Asymmetric Allylic Alkylation. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1533-3085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractPalladium-catalyzed decarboxylative asymmetric allylic alkylation (DAAA) provides an efficient and powerful strategy to construct quaternary stereocenters, which are widely present in biologically active natural products and approved drugs. In this short review, we summarize recent developments (since 2018) in the facile synthesis of quaternary stereocenters via DAAA methods. Several representative examples of the use of DAAA strategies for the total synthesis of complex natural products further demonstrate its synthetic potential in the realm of organic and medicinal chemistry.1 Introduction2 Construction of Quaternary Stereocenters via Palladium Catalyzed DAAA3 Construction of Quaternary Stereocenters via Pd-Catalyzed Interceptive DAAA4 Application of DAAA in Natural Product Synthesis5 Conclusion
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Affiliation(s)
- Xinhui Yu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University
| | - Ting Zhang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University
| | - Jitian Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University
| | - Xiaoxun Li
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University
- Suzhou Institute of Shandong University
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9
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Abstract
The asymmetric alkylation of enolates is a particularly versatile method for the construction of α-stereogenic carbonyl motifs, which are ubiquitous in synthetic chemistry. Over the past several decades, the focus has shifted to the development of new catalytic methods that depart from classical stoichiometric stereoinduction strategies (e.g., chiral auxiliaries, chiral alkali metal amide bases, chiral electrophiles, etc.). In this way, the enantioselective alkylation of prochiral enolates greatly improves the step- and redox-economy of this process, in addition to enhancing the scope and selectivity of these reactions. In this review, we summarize the origin and advancement of catalytic enantioselective enolate alkylation methods, with a directed emphasis on the union of prochiral nucleophiles with carbon-centered electrophiles for the construction of α-stereogenic carbonyl derivatives. Hence, the transformative developments for each distinct class of nucleophile (e.g., ketone enolates, ester enolates, amide enolates, etc.) are presented in a modular format to highlight the state-of-the-art methods and current limitations in each area.
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Affiliation(s)
- Timothy B Wright
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
| | - P Andrew Evans
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada.,Xiangya School of Pharmaceutical Sciences, Central South University, Changsha 410013, Hunan, P. R. of China
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10
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Mei W, Kong Y, Yan G. Synthetic applications of α,α-difluoroarylacetic acids and salts via decarboxylative functionalization. Org Chem Front 2021. [DOI: 10.1039/d1qo00775k] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
α,α-Difluoroarylacetic acids are stable, inexpensive and readily available building blocks which can be used to access various difluoromethylated aryl motifs via decarboxylative functionalization for the formation of carbon–carbon and carbon-heteroatom (F, O, S) bonds.
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Affiliation(s)
- Wenqiang Mei
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
| | - Yilin Kong
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
| | - Guobing Yan
- College of Jiyang, Zhejiang A&F University, Zhuji 311800, China
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11
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Maity A, Roy A, Das MK, De S, Naskar M, Bisai A. Oxidative cyanation of 2-oxindoles: formal total synthesis of (±)-gliocladin C. Org Biomol Chem 2020; 18:1679-1684. [PMID: 32052001 DOI: 10.1039/c9ob02752a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient oxidative direct cyanations of 3-alkyl/aryl 2-oxindoles using Cyano-1,2-BenziodoXol-3(1H)-one (CBX) (2a) have been reported under 'transition metal-free' conditions to synthesize a wide variety of 3-cyano 3-alkyl/aryl 2-oxindoles sharing an all-carbon quaternary center under additive-free conditions. The application of this process is shown by the formal total synthesis of (±)-gliocladin C (11c) in a few steps.
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Affiliation(s)
- Arindam Maity
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Avishek Roy
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Mrinal Kanti Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Subhadip De
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Malay Naskar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India.
| | - Alakesh Bisai
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India. and Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia - 741 246, West Bengal, India.
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12
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Roy A, Maity A, Giri R, Bisai A. Efficient Alkynylation of 2‐Oxindoles with Alkynyl Dibenzothiophenium Triflates: Total Synthesis of (±)‐Deoxyeseroline. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Avishek Roy
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Arindam Maity
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Rahul Giri
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
| | - Alakesh Bisai
- Department of ChemistryIndian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462 066 Madhya Pradesh India
- Department of Chemical SciencesIndian Institute of Science Education and Research Kolkata Mohanpur, Haringhata Kalyani, Nadia 741 246 West Bengal India
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13
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Budhwan R, Yadav S, Murarka S. Late stage functionalization of heterocycles using hypervalent iodine(iii) reagents. Org Biomol Chem 2019; 17:6326-6341. [PMID: 31215580 DOI: 10.1039/c9ob00694j] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Late stage functionalization (LSF) through direct X-H manipulations (X = C, N) enables synthetic chemists to accelerate the diversification of natural products, agrochemicals and pharmaceuticals allowing rapid access to novel bioactive molecules without resorting to arduous de novo synthesis. LSF does not only allow tapping of the hitherto unexplored chemical space but also renders the synthetic sequence more straightforward, atom economical and cost-effective. In this regard, the recent decade has witnessed the emergence of hypervalent iodine(iii) reagents as a powerful synthetic tool owing to their easy availability, mild reaction conditions, remarkable oxidizing properties and high functional group tolerance. Iodine(iii) reagents have tremendous applications in the regio- and chemo-selective late-stage functionalization of a diverse variety of heterocycles through an exciting range of transformations, such as oxidative amination, cross-dehydrogenative coupling (CDC), fluoroalkylation, azidation, halogenation and oxidation. The present review, classified according to the types of synthetic methods involved, encompasses all these recent developments in the field of transition-metal-free iodine(iii)-catalyzed/mediated direct functionalizations of heterocycles with representative examples and insightful mechanistic discussions.
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Affiliation(s)
- Rajnish Budhwan
- Department of Chemistry, Indian Institute of Technology Jodhpur, NH-65 Nagaur Road, Karwar - 342037, Jodhpur District, Rajasthan, India.
| | - Suman Yadav
- Department of Chemistry, Indian Institute of Technology Jodhpur, NH-65 Nagaur Road, Karwar - 342037, Jodhpur District, Rajasthan, India.
| | - Sandip Murarka
- Department of Chemistry, Indian Institute of Technology Jodhpur, NH-65 Nagaur Road, Karwar - 342037, Jodhpur District, Rajasthan, India.
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14
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Wang ZX, Li BJ. Construction of Acyclic Quaternary Carbon Stereocenters by Catalytic Asymmetric Hydroalkynylation of Unactivated Alkenes. J Am Chem Soc 2019; 141:9312-9320. [PMID: 31117476 DOI: 10.1021/jacs.9b03027] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Quaternary carbon stereocenters are common structural motifs in organic synthesis. The construction of these stereocenters in a catalytic and enantioselective manner remains a prominent synthetic challenge. In particular, methods for the synthesis of alkyne-substituted quaternary carbon stereocenters are very rare. Previous catalytic systems for hydroalkynylation of alkenes create tertiary stereocenters. We describe here an iridium catalyzed asymmetric hydroalkynylation of nonactivated trisubstituted alkene. The hydroalkynylation of β,γ-unsaturated amides occurs with high regio- and enantioselectivities to afford alkyne-substituted acyclic quaternary carbon stereocenters. Computational and experimental data suggest that the enantioselectivity is not only determined by the facial selectivity of the alkene but also by an alkene isomerization process. This strategy provides an efficient method to access alkyne-substituted acyclic quaternary carbon stereocenters with minimally functionalized starting materials.
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Affiliation(s)
- Zi-Xuan Wang
- Center of Basic Molecular Science (CBMS), Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China
| | - Bi-Jie Li
- Center of Basic Molecular Science (CBMS), Department of Chemistry , Tsinghua University , Beijing 100084 , P. R. China
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15
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Li M, Li W, Lin CD, Wang JH, Wen LR. One Base for Two Shots: Metal-Free Substituent-Controlled Synthesis of Two Kinds of Oxadiazine Derivatives from Alkynylbenziodoxolones and Amidoximes. J Org Chem 2019; 84:6904-6915. [DOI: 10.1021/acs.joc.9b00659] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ming Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Wei Li
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Cheng-Dong Lin
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Jia-Hui Wang
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Li-Rong Wen
- State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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16
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Jiang X, Zhu W, Yang L, Zheng Z, Yu C. Hypervalent Iodine-Mediated Cyclization of Homotryptamine Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801842] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xinpeng Jiang
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
| | - Weijie Zhu
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; Hangzhou P. R. China
| | - Liechao Yang
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
| | - Zicong Zheng
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
| | - Chuanming Yu
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou P. R. China
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals; Zhejiang University of Technology; Hangzhou P. R. China
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17
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Zhu Y, Wang D, Huang Y. Phosphine Sequentially Catalyzed Domino 1,6-Addition/Annulation: Access to Functionalized Chromans and Tetrahydroquinolines with an Ethynyl-Substituted All-Carbon Quaternary Center. Org Lett 2019; 21:908-912. [DOI: 10.1021/acs.orglett.8b03819] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yannan Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - Dan Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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18
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Reinus B, Kerwin SM. Preparation and Utility of N-Alkynyl Azoles in Synthesis. Molecules 2019; 24:E422. [PMID: 30682796 PMCID: PMC6384649 DOI: 10.3390/molecules24030422] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/16/2019] [Accepted: 01/22/2019] [Indexed: 12/05/2022] Open
Abstract
Heteroatom-substituted alkynes have attracted a significant amount of interest in the synthetic community due to the polarized nature of these alkynes and their utility in a wide range of reactions. One specific class of heteroatom-substituted alkynes combines this utility with the presence of an azole moiety. These N-alkynyl azoles have been known for nearly 50 years, but recently there has been a tremendous increase in the number of reports detailing the synthesis and utility of this class of compound. While much of the chemistry of N-alkynyl azoles mirrors that of the more extensively studied N-alkynyl amides (ynamides), there are notable exceptions. In addition, as azoles are extremely common in natural products and pharmaceuticals, these N-alkynyl azoles have high potential for accessing biologically important compounds. In this review, the literature reports of N-alkynyl azole synthesis, reactions, and uses have been assembled. Collectively, these reports demonstrate the growth in this area and the promise of exploiting N-alkynyl azoles in synthesis.
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Affiliation(s)
- Brandon Reinus
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712, USA.
| | - Sean M Kerwin
- Department of Chemistry & Biochemistry, Texas State University, San Marcos, TX 78666, USA.
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19
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Teodoro BVM, Silva LF. Sequential Michael Addition/Electrophilic Alkynylation: Synthesis of α-Alkynyl-β-Substituted Ketones and Chromanones. J Org Chem 2018; 83:13604-13611. [PMID: 30284445 DOI: 10.1021/acs.joc.8b02251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe the synthesis of α-alkynyl-β-substituted cyclic ketones and analogue chromanones via one-pot Michael addition/hypervalent iodine-based α-alkynylation. Cu(I)-catalyzed Michael addition using either alkyl-aluminum or Grignard reagents, followed by diastereoselective electrophilic alkynylation of the resulting enolate by 1-ethynyl-1λ3,2-benziodoxol-3(1H)-one (EBX) resulted in the α-alkynyl-β-substituted cyclic ketones or chromanones within 34-89% yield (16 examples). The reaction was successfully upscaled to the 5 mmol scale, and further functionalization of a model alkynylated ketone was demonstrated.
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Affiliation(s)
- Bruno V M Teodoro
- Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , São Paulo 05508-000 , Brazil
| | - Luiz F Silva
- Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , São Paulo 05508-000 , Brazil
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20
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Chen ZC, Chen P, Chen Z, Ouyang Q, Liang HP, Du W, Chen YC. Organocatalytic Enantioselective 1,3-Difunctionalizations of Morita–Baylis–Hillman Carbonates. Org Lett 2018; 20:6279-6283. [PMID: 30256122 DOI: 10.1021/acs.orglett.8b02764] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Chao Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Peng Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhi Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Qin Ouyang
- State Key Laboratory of Trauma, Burn and Combined Injury, and College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Hua-Ping Liang
- State Key Laboratory of Trauma, Burn and Combined Injury, and College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Wei Du
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- State Key Laboratory of Trauma, Burn and Combined Injury, and College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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Das MK, Kumar N, Bisai A. Catalytic Asymmetric Total Syntheses of Naturally Occurring Amarylidaceae Alkaloids, (−)-Crinine, (−)-epi-Crinine, (−)-Oxocrinine, (+)-epi-Elwesine, (+)-Vittatine, and (+)-epi-Vittatine*. Org Lett 2018; 20:4421-4424. [DOI: 10.1021/acs.orglett.8b01703] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mrinal K. Das
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Nivesh Kumar
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
| | - Alakesh Bisai
- Department of Chemistry, IISER Bhopal, Bhopal Bypass Road, Bhauri, Bhopal - 462 066, Madhya Pradesh, India
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