1
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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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2
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Kikuchi J, Nakajima R, Yoshikai N. Three-component N-alkenylation of azoles with alkynes and iodine(III) electrophile: synthesis of multisubstituted N-vinylazoles. Beilstein J Org Chem 2024; 20:891-897. [PMID: 38711595 PMCID: PMC11070964 DOI: 10.3762/bjoc.20.79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/11/2024] [Indexed: 05/08/2024] Open
Abstract
A stereoselective N-alkenylation of azoles with alkynes and iodine(III) electrophile is reported. The reaction between various azoles and internal alkynes is mediated by benziodoxole triflate as the electrophile in a trans-fashion, affording azole-bearing vinylbenziodoxoles in moderate to good yields. The tolerable azole nuclei include pyrazole, indazole, 1,2,3-triazole, benzotriazole, and tetrazole. The iodanyl group in the product can be leveraged as a versatile synthetic handle, allowing for the preparation of hitherto inaccessible types of densely functionalized N-vinylazoles.
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Affiliation(s)
- Jun Kikuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Roi Nakajima
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Naohiko Yoshikai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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3
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Doobary S, Di Tommaso EM, Postole A, Inge AK, Olofsson B. Structure-reactivity analysis of novel hypervalent iodine reagents in S-vinylation of thiols. Front Chem 2024; 12:1376948. [PMID: 38487782 PMCID: PMC10937425 DOI: 10.3389/fchem.2024.1376948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 02/19/2024] [Indexed: 03/17/2024] Open
Abstract
The transition-metal free S-vinylation of thiophenols by vinylbenziodoxolones (VBX) constituted an important step forward in hypervalent iodine-mediated vinylations, highlighting the difference to vinyliodonium salts and that the reaction outcome was influenced by the substitution pattern of the benziodoxolone core. In this study, we report several new classes of hypervalent iodine vinylation reagents; vinylbenziodazolones, vinylbenziodoxolonimine and vinyliodoxathiole dioxides. Their synthesis, structural and electronic properties are described and correlated to the S-vinylation outcome, shedding light on some interesting facets of these reagents.
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Affiliation(s)
- Sayad Doobary
- Department of Organic Chemistry, Stockholm University, Stockholm, Sweden
| | | | - Alexandru Postole
- Department of Organic Chemistry, Stockholm University, Stockholm, Sweden
| | - A. Ken Inge
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
| | - Berit Olofsson
- Department of Organic Chemistry, Stockholm University, Stockholm, Sweden
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4
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Arakawa C, Kanemoto K, Nakai K, Wang C, Morohashi S, Kwon E, Ito S, Yoshikai N. Carboiodanation of Arynes: Organoiodine(III) Compounds as Nucleophilic Organometalloids. J Am Chem Soc 2024; 146:3910-3919. [PMID: 38315817 DOI: 10.1021/jacs.3c11524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Organic iodine(III) compounds represent the most widely used hypervalent halogen compounds in organic synthesis, where they typically perform the role of an electrophile or oxidant to functionalize electron-rich or -nucleophilic organic compounds. In contrast to this convention, we discovered their unique reactivity as organometallic-like nucleophiles toward arynes. Equipped with diverse transferable ligands and supported by a tethered spectator ligand, the organoiodine(III) compounds undergo addition across the electrophilic C-C triple bond of arynes while retaining the trivalency of the iodine center. This carboiodanation reaction can forge a variety of aryl-alkynyl, aryl-alkenyl, and aryl-(hetero)aryl bonds along with the concurrent formation of an aryl-iodine(III) bond under mild conditions. The newly formed aryl-iodine(III) bond serves as a versatile linchpin for downstream transformations, particularly as an electrophilic reaction site. The amphoteric nature of the iodine(III) group as a metalloid and a leaving group in this sequence enables the flexible and expedient synthesis of extended π-conjugated molecules and privileged biarylphosphine ligands, where all of the iodine(III)-containing compounds can be handled as air- and thermally stable materials.
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Affiliation(s)
- Chisaki Arakawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kazuya Kanemoto
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Katsuya Nakai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University, Shaoxing 312000, People's Republic of China
| | - Shunya Morohashi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Eunsang Kwon
- Endowed Research Laboratory of Dimensional Integrated Nanomaterials, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
| | - Shingo Ito
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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5
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Sasaki S, Kikuchi J, Ito S, Yoshikai N. Stereoselective Approach to Multisubstituted Enolates from Unactivated Alkynes: Oxyalkylidenation of Alkynyl Ketone Enolates with Aldehydes. J Org Chem 2023; 88:14096-14104. [PMID: 37733580 DOI: 10.1021/acs.joc.3c01615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
The preparation of multisubstituted enolates with precise regio- and stereocontrol is a nontrivial task when conventional deprotonation methods are used on the corresponding carbonyl compounds. We describe herein an approach to preparing stereodefined enolates by leveraging the stereoselective oxyfunctionalization of unactivated alkynes, particularly in the context of the alkynylogous aldol reaction. trans-Iodo(III)acetoxylation of alkynes and subsequent Sonogashira coupling allow for the facile preparation of multisubstituted enynyl acetates, which can be deacetylated by MeLi into the corresponding enolates. The alkynyl enolates react with aldehydes to afford γ,δ-unsaturated β-diketones through a cascade of alkynylogous aldol addition, intramolecular Michael addition, and ring opening of the oxetene intermediate.
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Affiliation(s)
- Shuma Sasaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Jun Kikuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Shingo Ito
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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6
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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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7
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Le Du E, Ramirez NP, Nicolai S, Scopelliti R, Fadaei‐Tirani F, Wodrich MD, Hari DP, Waser J. X‐Ray and NMR Structural Data of Ethynylbenziodoxolones (EBXs) Reagents and Their Analogues. Helv Chim Acta 2023. [DOI: 10.1002/hlca.202200175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Eliott Le Du
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
| | - Nieves P. Ramirez
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
| | - Stefano Nicolai
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC GE BCH 2111, CH-1015 Lausanne Switzerland
| | - Farzaneh Fadaei‐Tirani
- Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC GE BCH 2111, CH-1015 Lausanne Switzerland
| | - Matthew D. Wodrich
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
| | - Durga Prasad Hari
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis Institut des Sciences et Ingénierie Chimique Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306, CH-1015 Lausanne Switzerland
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8
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Mondal S, Di Tommaso EM, Olofsson B. Transition-Metal-Free Difunctionalization of Sulfur Nucleophiles. Angew Chem Int Ed Engl 2023; 62:e202216296. [PMID: 36546892 PMCID: PMC10108051 DOI: 10.1002/anie.202216296] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Efficient protocols for accessing iodo-substituted diaryl and aryl(vinyl) sulfides have been developed using iodonium salts as reactive electrophilic arylation and vinylation reagents. The reactions take place under transition-metal-free conditions, employing odorless and convenient sulfur reagents. A wide variety of functional groups are tolerated in the S-diarylation, enabling the regioselective late-stage application of several heterocycles and drug molecules under mild reaction conditions. A novel S-difunctionalization pathway was discovered using vinyliodonium salts, which proceeds under additive-free reaction conditions and grants excellent stereoselectivity in the synthesis of aryl(vinyl) sulfides. A one-pot strategy combining transition-metal-free diarylation and subsequent reduction provided facile access to electron-rich thioanilines and a direct synthesis of a potential drug candidate derivative. The retained iodo group allows a wide array of further synthetic transformations. Mechanistic insights were elucidated by isolating the key intermediate, and the relevant energy profile was substantiated by DFT calculations.
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Affiliation(s)
- Shobhan Mondal
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Ester Maria Di Tommaso
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Berit Olofsson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
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9
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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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10
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Shimizu A, Shibata A, Kano T, Kumai Y, Kawakami R, Esaki H, Fukushima K, Tada N, Itoh A. Synthesis of 4-Imidazolidinones from Diamides and Ethynyl Benziodoxolones via Double Michael-Type Addition: Ethynyl Benziodoxolones as Electrophilic Ynol Synthons. Org Lett 2022; 24:8859-8863. [DOI: 10.1021/acs.orglett.2c03648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ayaka Shimizu
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Atsushi Shibata
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Takashi Kano
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Yuuichi Kumai
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Ryouhei Kawakami
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Hiroyoshi Esaki
- Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Kazuaki Fukushima
- Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Norihiro Tada
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
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11
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Yoshikai N. Exploring New Reactions and Syntheses of Trivalent Iodine Compounds. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.1011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Kikuchi J, Maesaki K, Sasaki S, Wang W, Ito S, Yoshikai N. Stereoselective Synthesis of β-Alkoxy-β-amido Vinylbenziodoxoles via Iodo(III)etherification of Ynamides. Org Lett 2022; 24:6914-6918. [PMID: 36125122 DOI: 10.1021/acs.orglett.2c02570] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A trans-iodo(III)etherification reaction of ynamides with benziodoxole triflate and alcohols is reported. Despite the sensitivity of ynamides and enamides toward Brønsted acid, the reaction could be successfully performed under carefully controlled conditions to afford β-alkoxy-β-amido vinylbenziodoxoles in moderate to good yields. The products could be subjected to a sequence of cross-coupling via C-I(III) bond cleavage and electrophilic halogenation of the resulting α-alkoxyenamides, allowing for the preparation of densely functionalized esters.
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Affiliation(s)
- Jun Kikuchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Kaito Maesaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Shuma Sasaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
| | - Weifan Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shingo Ito
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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13
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Di Tommaso EM, Norrby P, Olofsson B. Explaining Regiodivergent Vinylations with Vinylbenziodoxolones**. Angew Chem Int Ed Engl 2022; 61:e202206347. [PMID: 35748793 PMCID: PMC9541388 DOI: 10.1002/anie.202206347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Indexed: 12/02/2022]
Abstract
Vinylbenziodoxolones have recently been identified as efficient hypervalent iodine(III) reagents for electrophilic vinylations under transition metal‐free conditions. Their unique reactivity allows synthesis of either internal or terminal alkenes, depending on the nucleophile class. This paper constitutes the first mechanistic investigation of VBX vinylations, and makes use of NMR studies, deuterium labelling and computations to rationalize the observed regio‐ and stereochemical outcome. Internal alkene formation in S‐vinylation was found to proceed through the ligand coupling mechanism typical of diaryliodonium salts, whereas terminal alkene formation in P‐vinylations took place via a phosphinous acid‐coordinated VBX complex, which underwent concerted deprotonation and Michael‐type addition. Subsequent base‐assisted protonation and E2 elimination delivered the terminal alkene. The findings can be used to predict the regioselectivity in vinylations of other nucleophile classes.
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Affiliation(s)
- Ester M. Di Tommaso
- Department of Organic Chemistry Arrhenius Laboratory Stockholm University 10691 Stockholm Sweden
| | - Per‐Ola Norrby
- Data Science and Modelling Pharmaceutical Sciences R&D, AstraZeneca Gothenburg Sweden
| | - Berit Olofsson
- Department of Organic Chemistry Arrhenius Laboratory Stockholm University 10691 Stockholm Sweden
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14
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Mironova IA, Kirsch SF, Zhdankin V, Yoshimura A, Yusubov MS. Hypervalent Iodine‐Mediated Azidation Reactions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Irina A. Mironova
- Tomsk Polytechnic University: Nacional'nyj issledovatel'skij Tomskij politehniceskij universitet Chemistry RUSSIAN FEDERATION
| | - Stefan F. Kirsch
- Bergische Universität Wuppertal: Bergische Universitat Wuppertal Fakultät für Mathematik und Naturwissenschaften GERMANY
| | - Viktor Zhdankin
- University of Minnesota Duluth Chemistry 1039 University Dr 55812 Duluth UNITED STATES
| | - Akira Yoshimura
- Aomori University: Aomori Daigaku Department of Pharmacy JAPAN
| | - Mekhman S. Yusubov
- Tomsk Polytechnic University: Nacional'nyj issledovatel'skij Tomskij politehniceskij universitet Chemistry RUSSIAN FEDERATION
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15
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Di Tommaso EM, Norrby PO, Olofsson B. Explaining Regio‐Divergent Vinylations with Vinylbenziodoxolones. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Per-Ola Norrby
- AstraZeneca Sweden: AstraZeneca AB Data Science and Modelling, Pharmaceutical Sciences, R&D Gothenburg SWEDEN
| | - Berit Olofsson
- Stockholm University Departemt of Organic Chemistry Arrhenius Laboratory 106 91 Stockholm SWEDEN
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16
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Kuczmera TJ, Boelke A, Nachtsheim BJ. Stabilization of Ethynyl‐Substituted Aryl‐λ3‐Iodanes by Tethered N‐Heterocylces. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Thomas J Kuczmera
- University of Bremen: Universitat Bremen Institut für Organische und Analytische Chemie GERMANY
| | - Andreas Boelke
- University of Bremen: Universitat Bremen Institut für Organische und Analytische Chemie GERMANY
| | - Boris J Nachtsheim
- University of Bremen: Universitat Bremen Institut für Organische und Analytische Chemie Leobener Straße 7 28359 Bremen GERMANY
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17
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Allouche EMD, Grinhagena E, Waser J. Hypervalent Iodine‐Mediated Late‐Stage Peptide and Protein Functionalization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Emmanuelle M. D. Allouche
- Laboratory of Catalysis and Organic Synthesis Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402 1015 Lausanne Switzerland
| | - Elija Grinhagena
- Laboratory of Catalysis and Organic Synthesis Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402 1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402 1015 Lausanne Switzerland
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18
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Wang CS, Tan PSL, Ding W, Ito S, Yoshikai N. Regio- and Stereoselective Synthesis of Enol Carboxylate, Phosphate, and Sulfonate Esters via Iodo(III)functionalization of Alkynes. Org Lett 2021; 24:430-434. [PMID: 34962817 DOI: 10.1021/acs.orglett.1c04123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
β-Iodo(III)enol carboxylates, phosphates, and tosylates can be efficiently synthesized through regio- and stereoselective iodo(III)functionalization of alkynes. The combination of chlorobenziodoxole and silver salt has proven to generate a versatile cationic iodine(III) electrophile to activate alkynes and engage various carboxylic acids, triethyl phosphate, and p-toluenesulfonic acid as nucleophiles. The β-iodo(III)enol esters serve as starting materials for the synthesis of multisubstituted alkenes through sequential cross-coupling of the C-I(III) and C-O bonds.
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Affiliation(s)
- Chang-Sheng Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Ploypailin Siew Ling Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shingo Ito
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.,Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan
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19
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Shea MT, Rohde GT, Vlasenko YA, Postnikov PS, Yusubov MS, Zhdankin VV, Saito A, Yoshimura A. Convenient Synthesis of Benziodazolone: New Reagents for Direct Esterification of Alcohols and Amidation of Amines. Molecules 2021; 26:molecules26237355. [PMID: 34885939 PMCID: PMC8659036 DOI: 10.3390/molecules26237355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 11/16/2022] Open
Abstract
Hypervalent iodine heterocycles represent one of the important classes of hypervalent iodine reagents with many applications in organic synthesis. This paper reports a simple and convenient synthesis of benziodazolones by the reaction of readily available iodobenzamides with m-chloroperoxybenzoic acid in acetonitrile at room temperature. The structure of one of these new iodine heterocycles was confirmed by X-ray analysis. In combination with PPh3 and pyridine, these benziodazolones can smoothly react with alcohols or amines to produce the corresponding esters or amides of 3-chlorobenzoic acid, respectively. It was found that the novel benziodazolone reagent reacts more efficiently than the analogous benziodoxolone reagent in this esterification.
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Affiliation(s)
- Michael T. Shea
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, MN 55812, USA;
| | | | - Yulia A. Vlasenko
- Research School of Chemisty and Applied Biomediacl Sciences, The Tomsk Polytechnic University, 634050 Tomsk, Russia; (Y.A.V.); (P.S.P.); (M.S.Y.)
| | - Pavel S. Postnikov
- Research School of Chemisty and Applied Biomediacl Sciences, The Tomsk Polytechnic University, 634050 Tomsk, Russia; (Y.A.V.); (P.S.P.); (M.S.Y.)
| | - Mekhman S. Yusubov
- Research School of Chemisty and Applied Biomediacl Sciences, The Tomsk Polytechnic University, 634050 Tomsk, Russia; (Y.A.V.); (P.S.P.); (M.S.Y.)
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, MN 55812, USA;
- Correspondence: (V.V.Z.); (A.S.); (A.Y.)
| | - Akio Saito
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan
- Correspondence: (V.V.Z.); (A.S.); (A.Y.)
| | - Akira Yoshimura
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, MN 55812, USA;
- Research School of Chemisty and Applied Biomediacl Sciences, The Tomsk Polytechnic University, 634050 Tomsk, Russia; (Y.A.V.); (P.S.P.); (M.S.Y.)
- Correspondence: (V.V.Z.); (A.S.); (A.Y.)
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20
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Chai J, Ding W, Wang C, Ito S, Wu J, Yoshikai N. Ritter-type iodo(iii)amidation of unactivated alkynes for the stereoselective synthesis of multisubstituted enamides. Chem Sci 2021; 12:15128-15133. [PMID: 34909154 PMCID: PMC8612402 DOI: 10.1039/d1sc05240c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 10/26/2021] [Indexed: 01/24/2023] Open
Abstract
The Ritter reaction, Brønsted- or Lewis acid-mediated amidation of alkene or alcohol with nitrile via a carbocation, represents a classical method for the synthesis of tertiary amides. Although analogous reactions through a vinyl cation or a species alike may offer a route to enamide, an important synthetic building block as well as a common functionality in bioactive compounds, such transformations remain largely elusive. Herein, we report a Ritter-type trans-difunctionalization of alkynes with a trivalent iodine electrophile and nitrile, which affords β-iodanyl enamides in moderate to good yields. Mediated by benziodoxole triflate (BXT), the reaction proves applicable to a variety of internal alkynes as well as to various alkyl- and arylnitriles. The benziodoxole group in the product serves as a versatile handle for further transformations, thus allowing for the preparation of various tri- and tetrasubstituted enamides that are not readily accessible by other means.
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Affiliation(s)
- Jinkui Chai
- College of Chemistry, Institute of Green Catalysis, Zhengzhou University Zhengzhou 450001 P. R. China .,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore.,Division of Molecular Catalysis and Synthesis, Henan Institute of Advanced Technology, Zhengzhou University Zhengzhou 450001 P. R. China
| | - Chen Wang
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemical Process, Shaoxing University Shaoxing 312000 P. R. China
| | - Shingo Ito
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
| | - Junliang Wu
- College of Chemistry, Institute of Green Catalysis, Zhengzhou University Zhengzhou 450001 P. R. China
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore.,Graduate School of Pharmaceutical Sciences, Tohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
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21
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Allouche EMD, Grinhagena E, Waser J. Hypervalent Iodine-Mediated Late-Stage Peptide and Protein Functionalization. Angew Chem Int Ed Engl 2021; 61:e202112287. [PMID: 34674359 PMCID: PMC9299824 DOI: 10.1002/anie.202112287] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Indexed: 12/20/2022]
Abstract
Hypervalent iodine compounds are powerful reagents for the development of novel transformations. As they exhibit low toxicity, high functional group tolerance, and stability in biocompatible media, they have been used for the functionalization of biomolecules. Herein, we report recent advances up to June 2021 in peptide and protein modification using hypervalent iodine reagents. Their use as group transfer or oxidizing reagents is discussed in this Minireview, including methods targeting polar, aromatic, or aliphatic amino acids and peptide termini.
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Affiliation(s)
- Emmanuelle M D Allouche
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402, 1015, Lausanne, Switzerland
| | - Elija Grinhagena
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402, 1015, Lausanne, Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC, LCSO, BCH 1402, 1015, Lausanne, Switzerland
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22
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Le Du E, Duhail T, Wodrich MD, Scopelliti R, Fadaei‐Tirani F, Anselmi E, Magnier E, Waser J. Structure and Reactivity of N-Heterocyclic Alkynyl Hypervalent Iodine Reagents. Chemistry 2021; 27:10979-10986. [PMID: 33978974 PMCID: PMC8361724 DOI: 10.1002/chem.202101475] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Indexed: 12/23/2022]
Abstract
Ethynylbenziodoxol(on)e (EBX) cyclic hypervalent iodine reagents have become popular reagents for the alkynylation of radicals and nucleophiles, but only offer limited possibilities for further structure and reactivity fine-tuning. Herein, the synthesis of new N-heterocyclic hypervalent iodine reagents with increased structural flexibility based on amide, amidine and sulfoximine scaffolds is reported. Solid-state structures of the reagents are reported and the analysis of the I-Calkyne bond lengths allowed assessing the trans-effect of the different substituents. Molecular electrostatic potential (MEP) maps of the reagents, derived from DFT computations, revealed less pronounced σ-hole regions for sulfonamide-based compounds. Most reagents reacted well in the alkynylation of β-ketoesters. The alkynylation of thiols afforded more variable yields, with compounds with a stronger σ-hole reacting better. In metal-mediated transformations, the N-heterocyclic hypervalent iodine reagents gave inferior results when compared to the O-based EBX reagents.
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Affiliation(s)
- Eliott Le Du
- Laboratory of Catalysis and Organic SynthesisEcole Polytechnique Fédérale de LausanneEPFL SB ISIC LCSO, BCH 43061015LausanneSwitzerland
| | - Thibaut Duhail
- Institut Lavoisier de VersaillesUniversité Paris-Saclay, UVSQ, CNRS, UMR 81807800VersaillesFrance
| | - Matthew D. Wodrich
- Laboratory of Catalysis and Organic SynthesisEcole Polytechnique Fédérale de LausanneEPFL SB ISIC LCSO, BCH 43061015LausanneSwitzerland
| | - Rosario Scopelliti
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de LausanneEPFL SB ISIC GE, BCH 2111, 1015 LausanneEPFL SB ISIC LCSO, BCH 43061015LausanneSwitzerland
| | - Farzaneh Fadaei‐Tirani
- Institute of Chemical Sciences and EngineeringEcole Polytechnique Fédérale de LausanneEPFL SB ISIC GE, BCH 2111, 1015 LausanneEPFL SB ISIC LCSO, BCH 43061015LausanneSwitzerland
| | - Elsa Anselmi
- Institut Lavoisier de VersaillesUniversité Paris-Saclay, UVSQ, CNRS, UMR 81807800VersaillesFrance
- Université de ToursFaculté des Sciences et Techniques37200ToursFrance
| | - Emmanuel Magnier
- Institut Lavoisier de VersaillesUniversité Paris-Saclay, UVSQ, CNRS, UMR 81807800VersaillesFrance
| | - Jerome Waser
- Laboratory of Catalysis and Organic SynthesisEcole Polytechnique Fédérale de LausanneEPFL SB ISIC LCSO, BCH 43061015LausanneSwitzerland
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23
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Lim B, Cheng Y, Kato T, Pham A, Le Du E, Mishra AK, Grinhagena E, Moreau D, Sakai N, Waser J, Matile S. Inhibition of Thiol‐Mediated Uptake with Irreversible Covalent Inhibitors. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bumhee Lim
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Yangyang Cheng
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Takehiro Kato
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Anh‐Tuan Pham
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Eliott Le Du
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306 1015 Lausanne Switzerland
| | - Abhaya Kumar Mishra
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306 1015 Lausanne Switzerland
| | - Elija Grinhagena
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306 1015 Lausanne Switzerland
| | - Dimitri Moreau
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Naomi Sakai
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
| | - Jerome Waser
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne EPFL SB ISIC LCSO BCH 4306 1015 Lausanne Switzerland
| | - Stefan Matile
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
- National Centre of Competence in Research (NCCR) Chemical Biology Quai Ernest Ansermet 30 CH-1211 Geneva 4 Switzerland
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24
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Yoshimura A, Huss CD, Liebl M, Rohde GT, Larson SM, Frahm GB, Luedtke MW, Schumacher TJ, Gardner ZS, Zhdankin VV, Postnikov PS, Yusubov MS, Kitamura T, Saito A. Preparation, Structure, and Reactivity of Pseudocyclic β‐Trifluorosulfonyloxy Vinylbenziodoxolone Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100341] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Akira Yoshimura
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University 634050 Tomsk Russia
- Department of Chemistry and Biochemistry The College of St. Scholastica Duluth Minnesota 55811 USA
| | - Christopher D. Huss
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | - Mackenzie Liebl
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | | | - Scott M. Larson
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | - Gunnar B. Frahm
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | | | - Tanner J. Schumacher
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | - Zachary S. Gardner
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry University of Minnesota Duluth Minnesota 55812 USA
| | - Pavel S. Postnikov
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University 634050 Tomsk Russia
- Department of Solid-State Engineering University of Chemistry and Technology Prague 16628 Czech Republic
| | - Mekhman S. Yusubov
- Research School of Chemistry and Applied Biomedical Sciences The Tomsk Polytechnic University 634050 Tomsk Russia
| | - Tsugio Kitamura
- Department of Chemistry and Applied Chemistry Saga University, Honjo-machi Saga 840-8502 Japan
| | - Akio Saito
- Division of Applied Chemistry Institute of Engineering Tokyo University of Agriculture and Technology 2-23-16 Naka-cho Koganei Tokyo 184-8588
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25
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Shimbo D, Maruyama T, Tada N, Itoh A. N-Alkenylation of hydroxamic acid derivatives with ethynyl benziodoxolone to synthesize cis-enamides through vinyl benziodoxolones. Org Biomol Chem 2021; 19:2442-2447. [PMID: 33666207 DOI: 10.1039/d1ob00055a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The stereoselective synthesis of cis-β-N-alkoxyamidevinyl benziodoxolones (cis-β-N-RO-amide-VBXs) from O-alkyl hydroxamic acids in the presence of an ethynyl benziodoxolone-acetonitrile complex (EBX-MeCN) is reported herein. The reaction was performed under mild conditions including an aqueous solvent, a mild base, and room temperature. The reaction tolerated various O-alkyl hydroxamic acids derived from carboxylic acids, such as amino acids, pharmaceuticals, and natural products. Vinyl dideuterated cis-β-N-MeO-amide-VBXs were also synthesized using deuterium oxide as the deuterium source. Valine-derived cis-β-N-MeO-amide-VBX was stereospecifically derivatized to hydroxamic acid-derived cis-enamides without the loss of stereoselectivity or reduction in the deuterium/hydrogen ratio.
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Affiliation(s)
- Daisuke Shimbo
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan.
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26
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Laskar RA, Ding W, Yoshikai N. Iodo(III)-Meyer-Schuster Rearrangement of Propargylic Alcohols Promoted by Benziodoxole Triflate. Org Lett 2021; 23:1113-1117. [PMID: 33439023 DOI: 10.1021/acs.orglett.1c00039] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Benziodoxole triflate (BXT), a cyclic iodine(III) electrophile, has been found to promote a rearrangement of propargylic alcohols into α,β-unsaturated ketones bearing an α-λ3-iodanyl group. This iodo(III)-Meyer-Schuster rearrangement proceeds under mild conditions and tolerates a variety of functionalized propargylic alcohols, thus complementing previously reported halogen-intercepted Meyer-Schuster rearrangement. The α-λ3-iodanylenones can be utilized for facile Pd-catalyzed cross-coupling for the synthesis of multisubstituted enones.
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Affiliation(s)
- Roshayed Ali Laskar
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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27
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Yoshimura A, Huss CD, Saito A, Kitamura T, Zhdankin VV. 2-Iodosylbenzoic acid activated by trifluoromethanesulfonic anhydride: efficient oxidant and electrophilic reagent for preparation of iodonium salts. NEW J CHEM 2021. [DOI: 10.1039/d1nj03787k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Iodosylbenzoic acid in the presence of trifluoromethanesulfonic anhydride is an efficient oxidant and electrophilic reagent useful for preparation of the corresponding alkenyl and aryliodonium salts.
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Affiliation(s)
- Akira Yoshimura
- The Tomsk Polytechnic University, 634050 Tomsk, Russia
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, MN 55812, USA
| | - Christopher D. Huss
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, MN 55812, USA
| | - Akio Saito
- Division of Applied Chemistry, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Tsugio Kitamura
- Department of Chemistry and Applied Chemistry, Saga University, Honjo-machi, Saga 840-8502, Japan
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, MN 55812, USA
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