1
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Groslambert L, Pale P, Mamane V. Telluronium-Catalyzed Halogenation Reactions: Chalcogen-Bond Activation of N-Halosuccinimides and Catalysis. Chemistry 2024; 30:e202401650. [PMID: 38785097 DOI: 10.1002/chem.202401650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 05/16/2024] [Accepted: 05/24/2024] [Indexed: 05/25/2024]
Abstract
The ability of triaryltelluronium salts to interact with N-halosuccinimides (NXS) through chalcogen bonding (ChB) in the solid state and in solution is demonstrated herein. Cocrystals of the triaryltelluronium bearing two CF3 electron-withdrawing groups per aryl ring with N-chloro-, N-bromo- and N-iodosuccinimide (respectively NCS, NBS and NIS) were analyzed by X-ray diffraction, evidencing a ChB between tellurium and the carbonyl group of NXS. This ChB was confirmed in solution by NMR spectroscopy, especially by 125Te NMR titration experiment, which allowed the determination of the association constant (Ka) between the telluronium and NBS. The so-obtained Ka value of 17.3±0.6 M-1 indicated a moderate interaction in solution because of the competitive role of the solvent. The strength of the Te⋅⋅⋅O ChB was however sufficient enough to promote the catalytic halofunctionalization of aromatics and of alkenes such as the intra- and intermolecular haloalkoxylation and haloesterification of alkenes.
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Affiliation(s)
- Loic Groslambert
- Institute of Chemistry of Strasbourg, UMR 7177, CNRS and Strasbourg University, 4 rue Blaise Pascal, 67000, Strasbourg, France
| | - Patrick Pale
- Institute of Chemistry of Strasbourg, UMR 7177, CNRS and Strasbourg University, 4 rue Blaise Pascal, 67000, Strasbourg, France
| | - Victor Mamane
- Institute of Chemistry of Strasbourg, UMR 7177, CNRS and Strasbourg University, 4 rue Blaise Pascal, 67000, Strasbourg, France
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2
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Wang Y, Zhao H, Yang C, Fang L, Zheng L, Lv H, Stavropoulos P, Ai L, Zhang J. Chiral Recognition of Chiral (Hetero)Cyclic Derivatives Probed by Tetraaza Macrocyclic Chiral Solvating Agents via 1H NMR Spectroscopy. Anal Chem 2024; 96:5188-5194. [PMID: 38506628 DOI: 10.1021/acs.analchem.3c05395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
In the field of chiral recognition, chiral cyclic organic compounds, especially heterocyclic organic compounds, have attracted little attention and have been rarely studied as chiral substrates by means of 1H NMR spectroscopy. In this paper, enantiomers of thiohydantoin derivatives, representing typical five-membered N,N-heterocycles, have been synthesized and utilized for assignment of absolute configuration and analysis of enantiomeric excess. All enantiomers have been successfully differentiated with the assistance of novel tetraaza macrocyclic chiral solvating agents (TAMCSAs) by 1H NMR spectroscopy. Surprisingly, unprecedented nonequivalent chemical shift values (up to 2.052 ppm) of the NH proton of substrates have been observed, a new milestone in the evaluation of enantiomers. To better understand the intermolecular interactions between host and guest, Job plots and theoretical calculations of (S)-G1 and (R)-G1 with TAMCSA 1a were investigated and revealed significant geometric differentiation between the diastereomers. In order to evaluate practical applications of the present systems in analyzing optical purity of chiral substrates, enantiomeric excesses of a typical substrate (G1) with different optical compositions in the presence of a representative TAMCSA (1a) can be accurately calculated based on the integration of the NH proton's signal peaks. Importantly, this work provides a significant breakthrough in exploring and developing the chiral recognition of chiral heterocyclic organic compounds by 1H NMR spectroscopy.
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Affiliation(s)
- Yu Wang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hongmei Zhao
- State Key Laboratory of Information Photonics and Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China
| | - Chunxia Yang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Lixia Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Li Zheng
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Hehua Lv
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Pericles Stavropoulos
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409, United States
| | - Lin Ai
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Jiaxin Zhang
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
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3
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Sugano M, Inokuma T, Yamaoka Y, Yamada KI. 5- exo-Selective asymmetric bromolactonization of stilbenecarboxylic acids catalyzed by phenol-bearing chiral thiourea. Org Biomol Chem 2024; 22:1765-1769. [PMID: 38099597 DOI: 10.1039/d3ob01895d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
We developed a novel thiourea Lewis-base catalyst with phenol moieties for the enantioselective 5-exo-bromolactonization of stilbenecarboxylic acids to afford chiral 3-substituted phthalides. The phenol moieties are crucial for the enantio- and regio-selectivity.
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Affiliation(s)
- Masayuki Sugano
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan.
| | - Tsubasa Inokuma
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan.
- Research Cluster on "Key Material Development, " Tokushima University, Shomachi, Tokushima 770-8505, Japan
| | - Yousuke Yamaoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan
| | - Ken-Ichi Yamada
- Graduate School of Pharmaceutical Sciences, Tokushima University, Shomachi, Tokushima 770-8505, Japan.
- Research Cluster on "Key Material Development, " Tokushima University, Shomachi, Tokushima 770-8505, Japan
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4
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Cao TY, Qi L, Wang LJ. Switchable Regioselective 7- endo or 6- exo Iodocyclization of O-Homoallyl Benzimidates. J Org Chem 2023. [PMID: 36757344 DOI: 10.1021/acs.joc.2c02729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
We present a facile switchable regioselective 7-endo or 6-exo iodocyclization of O-homoallyl benzimidates here, which affords various iodo-substituted 1,3-oxazines and tetrahydro-1,3-oxazepines in a controllable manner. The products can further undergo substitution reactions to afford a series of rich functionalized target heterocyclic molecules. The developed protocol has the advantages of mild conditions, simple operation, and excellent functional group compatibility.
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Affiliation(s)
- Tong-Yang Cao
- College of Chemistry & Environmental Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Lin Qi
- College of Chemistry & Environmental Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
| | - Li-Jing Wang
- College of Chemistry & Environmental Science, Key Laboratory of Medicinal Chemistry, and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, 180 Wusi Donglu, Baoding 071002, P. R. China
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5
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Liao L, Zhao X. Indane-Based Chiral Aryl Chalcogenide Catalysts: Development and Applications in Asymmetric Electrophilic Reactions. Acc Chem Res 2022; 55:2439-2453. [PMID: 36007167 DOI: 10.1021/acs.accounts.2c00201] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Asymmetric electrophilic reactions provide an ideal method for the construction of chiral molecules by incorporating one or more functional groups into the parent substrates under mild conditions. However, due to the issues of the reactivities of electrophilic species and the possible racemization of chiral intermediates as well as the restriction of the chiral scaffolds of chiral catalysts, many limitations remain in this field, such as the narrow scopes of substrates and electrophiles as well as the limited types of nucleophiles and reactions. To overcome the limitations in the synthesis of diversified chiral molecules, we developed a series of indane-based chiral amino aryl chalcogenide catalysts. These catalysts are easily prepared based on the privileged chiral indane scaffold. They can provide an appropriate H-bonding effect by varying the amino protecting groups as well as offer a proper Lewis basicity and steric hindrance by adjusting different substituents on the aryl chalcogenide motifs. These features allow for them to meet the requirements of reactivity and the chiral environment of the reactions. Notably, they have been successfully applied to various asymmetric electrophilic reactions of alkenes, alkynes, and arenes, expanding the field of electrophilic reactions.Using these catalysts, we realized the enantioselective CF3S-lactonization of olefinic carboxylic acids, enantioselective CF3S-aminocyclization of olefinic sulfonamides, desymmetrizing enantioselective CF3S-carbocyclization of gem-diaryl-tethered alkenes, enantioselective CF3S-oxycyclization of N-allylamides, enantioselective intermolecular trifluoromethylthiolating difunctionalization and allylic C-H trifluoromethylthiolation of trisubstituted alkenes, formally the intermolecular CF3S-oxyfunctionalization of aliphatic internal alkenes, intermolecular azidothiolation, oxythiolation, thioarylation of N-allyl sulfonamides, desymmetrizing enantioselective chlorocarbocyclization of aryl-tethered diolefins, enantioselective Friedel-Crafts-type electrophilic chlorination of N-allyl anilides, and enantioselective chlorocarbocyclization and dearomatization of N-allyl 1-naphthanilides. Additionally, the enantioselective electrophilic carbothiolation of alkynes to construct enantiopure carbon chirality center-containing molecules and axially chiral amino sulfide vinyl arenes and the electrophilic aromatic halogenation to produce P-chirogenic compounds can be accomplished. In these reactions, a bifunctional binding mode is proposed in the catalytic cycles, in which an acid-derived anion-binding interaction might exist and account for the high enantioselectivities of the reactions.In this Account, we demonstrate our achievements in asymmetric electrophilic reactions and share our thoughts on catalyst design, our understanding of asymmetric electrophilic reactions, and our perspectives in the field of chiral chalcogenide-catalyzed asymmetric electrophilic reactions. We hope that the experience we share will promote the design and development of other novel organocatalysts and new challenging reactions.
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Affiliation(s)
- Lihao Liao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
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6
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Liu R, Wang Y, Hu Z, Wu J, Gong C, Jiang Z, Li D, Wang F, Yang J. K
2
S
2
O
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‐Promoted Haloamination of Non‐Functionalized Olefins for the Synthesis of 2‐Halomethyl Indolines and 2‐Halomethyl Dihydrobenzofuran. ChemistrySelect 2022. [DOI: 10.1002/slct.202201932] [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)
- Ruyan Liu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Yan Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Zhouman Hu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Jianglong Wu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Chengwei Gong
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Zishuo Jiang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Dianjun Li
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Fuqiang Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
| | - Jinhui Yang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical Engineering Ningxia University Yinchuan 750000 PR China
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Liao L, Xu X, Ji J, Zhao X. Asymmetric Intermolecular Iodinative Difunctionalization of Allylic Sulfonamides Enabled by Organosulfide Catalysis: Modular Entry to Iodinated Chiral Molecules. J Am Chem Soc 2022; 144:16490-16501. [PMID: 36053004 DOI: 10.1021/jacs.2c05668] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Electrophilic halogenation of alkenes is a powerful transformation offering a convenient route for the construction of valuable functionalized molecules. However, as a highly important reaction in this field, catalytic asymmetric intermolecular iodinative difunctionalization remains a formidable challenge. Herein, we report that an efficient Lewis basic chiral sulfide-catalyzed approach enables this reaction. By this approach, challenging substrates such as γ,γ-disubstituted allylic sulfonamides and 1,1-disubstituted alkenes with an allylic sulfonamide unit undergo electrophilic iodinative difunctionalization to give a variety of iodine-functionalized chiral molecules in good yields with excellent enantio- and diastereoselectivities. A series of free phenols as nucleophiles are successfully incorporated into the substrates. Aside from phenols, primary and secondary alcohols, fluoride, and azide also serve as efficient nucleophiles. The obtained iodinated products are a good platform molecule, which can be easily transformed into various chiral compounds such as α-aryl ketones, chiral secondary amines, and aziridines via rearrangement or substitution. Mechanistic studies revealed that the chiral sulfide catalyst displays a superior effect on control of the reactivity of electrophilic iodine and the enantioselective construction of the chiral iodiranium ion intermediate and catalyst aggregates might be formed as a resting state in the reactions.
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Affiliation(s)
- Lihao Liao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Xinru Xu
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Jieying Ji
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510006, P. R. China
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8
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Sun H, Shang H, Cui B. (Salen)Mn(III)-Catalyzed Enantioselective Intramolecular Haloamination of Alkenes through Chiral Aziridinium Ion Ring-Opening Sequence. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hui Sun
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, People’s Republic of China
| | - Huijian Shang
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, People’s Republic of China
| | - Bin Cui
- College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, People’s Republic of China
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9
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Yamashita K, Hirokawa R, Ichikawa M, Hisanaga T, Nagao Y, Takita R, Watanabe K, Kawato Y, Hamashima Y. Mechanistic Details of Asymmetric Bromocyclization with BINAP Monoxide: Identification of Chiral Proton-Bridged Bisphosphine Oxide Complex and Its Application to Parallel Kinetic Resolution. J Am Chem Soc 2022; 144:3913-3924. [PMID: 35226811 DOI: 10.1021/jacs.1c11816] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The mechanism of our previously reported catalytic asymmetric bromocyclization reactions using 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (BINAP) monoxide was examined in detail by the means of control experiments, NMR studies, X-ray structure analysis, and CryoSpray electrospray ionization mass spectrometry (ESI-MS) analysis. The chiral BINAP monoxide was transformed to a key catalyst precursor, proton-bridged bisphosphine oxide complex (POHOP·Br), in the presence of N-bromosuccinimide (NBS) and contaminating water. The thus-formed POHOP further reacts with NBS to afford BINAP dioxide and molecular bromine (Br2) simultaneously in equimolar amounts. While the resulting Br2 is activated by NBS to form a more reactive brominating reagent (Br2─NBS), BINAP dioxide serves as a bifunctional catalyst, acting as both a Lewis base that reacts with Br2─NBS to form a chiral brominating agent (P═O+─Br) and also as a Brønsted base for the activation of the substrate. By taking advantage of this novel concerted Lewis/Brønsted base catalysis by BINAP dioxide, we achieved the first regio- and chemodivergent parallel kinetic resolutions (PKRs) of racemic unsymmetrical bisallylic amides via bromocyclization.
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Affiliation(s)
- Kenji Yamashita
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Ryo Hirokawa
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Mamoru Ichikawa
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Tatsunari Hisanaga
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoshihiro Nagao
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuji Kawato
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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10
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Yan J, Zhou Z, He Q, Chen G, Wei H, Xie W. The applications of catalytic asymmetric halocyclization in natural product synthesis. Org Chem Front 2022. [DOI: 10.1039/d1qo01395e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Catalytic asymmetric halocyclization of olefinic substrate has evolved rapidly and been well utilized as a practical strategy for constructing enantioenriched cyclic skeletons in natural product synthesis.
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Affiliation(s)
- Jiahang Yan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Zhiqiang Zhou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Qiaoqiao He
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
- Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
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11
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He Y, Qin X, He X, Wu X, Yin Z. Practical Synthesis of Halogenated
N
‐Heterocycles via Electrochemical Anodic Oxidation of Unactivated Alkenes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yanyang He
- School of Pharmacy Jiangsu University Zhenjiang 212013 P. R. China
| | - Xiaowen Qin
- School of Pharmacy Jiangsu University Zhenjiang 212013 P. R. China
| | - Xinxu He
- School of Pharmacy Jiangsu University Zhenjiang 212013 P. R. China
| | - Xiao‐Feng Wu
- Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Science 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Zhiping Yin
- School of Pharmacy Jiangsu University Zhenjiang 212013 P. R. China
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12
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Engl S, Reiser O. Catalyst-Free Visible-Light-Mediated Iodoamination of Olefins and Synthetic Applications. Org Lett 2021; 23:5581-5586. [PMID: 34210129 DOI: 10.1021/acs.orglett.1c02035] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we report a catalyst- and metal-free visible-light-mediated protocol enabling the iodoamination of miscellaneous olefins. This protocol is characterized by high yields under environmentally benign reaction conditions utilizing commercially available substrates and a green and biodegradable solvent. Furthermore, the protocol allows for late-stage functionalization of bioactive molecules and can be scaled to gram quantities of product, which offers manifold possibilities for further transformations, including morpholine, piperidine, pyrrolidine, and aziridine synthesis.
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Affiliation(s)
- Sebastian Engl
- Institute of Organic Chemistry, University of Regensburg, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, 93053 Regensburg, Germany
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13
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Okuno K, Nakamura T, Shirakawa S. Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ken Okuno
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Takumi Nakamura
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Seiji Shirakawa
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
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14
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China H, Kumar R, Kikushima K, Dohi T. Halogen-Induced Controllable Cyclizations as Diverse Heterocycle Synthetic Strategy. Molecules 2020; 25:molecules25246007. [PMID: 33353126 PMCID: PMC7765919 DOI: 10.3390/molecules25246007] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 11/24/2022] Open
Abstract
In organic synthesis, due to their high electrophilicity and leaving group properties, halogens play pivotal roles in the activation and structural derivations of organic compounds. Recently, cyclizations induced by halogen groups that allow the production of diverse targets and the structural reorganization of organic molecules have attracted significant attention from synthetic chemists. Electrophilic halogen atoms activate unsaturated and saturated hydrocarbon moieties by generating halonium intermediates, followed by the attack of carbon-containing, nitrogen-containing, oxygen-containing, and sulfur-containing nucleophiles to give highly functionalized carbocycles and heterocycles. New transformations of halogenated organic molecules that can control the formation and stereoselectivity of the products, according to the difference in the size and number of halogen atoms, have recently been discovered. These unique cyclizations may possibly be used as efficient synthetic strategies with future advances. In this review, innovative reactions controlled by halogen groups are discussed as a new concept in the field of organic synthesis.
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Affiliation(s)
- Hideyasu China
- Department of Medical Bioscience, Nagahama Institute of Bio-Science and Technology, 1266, Tamuracho Nagahama-shi, Shiga 526-0829, Japan
- Correspondence: (H.C.); (T.D.)
| | - Ravi Kumar
- Department of Chemistry, J. C. Bose University of Science & Technology, YMCA, NH-2, Sector-6, Mathura Road, Faridabad, Haryana 121006, India;
| | - Kotaro Kikushima
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-0058, Japan;
| | - Toshifumi Dohi
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-0058, Japan;
- Correspondence: (H.C.); (T.D.)
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15
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Steigerwald DC, Soltanzadeh B, Sarkar A, Morgenstern CC, Staples RJ, Borhan B. Ritter-enabled catalytic asymmetric chloroamidation of olefins. Chem Sci 2020; 12:1834-1842. [PMID: 34163947 PMCID: PMC8179065 DOI: 10.1039/d0sc05224h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Intermolecular asymmetric haloamination reactions are challenging due to the inherently high halenium affinity (HalA) of the nitrogen atom, which often leads to N-halogenated products as a kinetic trap. To circumvent this issue, acetonitrile, possessing a low HalA, was used as the nucleophile in the catalytic asymmetric Ritter-type chloroamidation of allyl-amides. This method is compatible with Z and E alkenes with both alkyl and aromatic substitution. Mild acidic workup reveals the 1,2-chloroamide products with enantiomeric excess greater than 95% for many examples. We also report the successful use of the sulfonamide chlorenium reagent dichloramine-T in this chlorenium-initiated catalytic asymmetric Ritter-type reaction. Facile modifications lead to chiral imidazoline, guanidine, and orthogonally protected 1,2,3 chiral tri-amines. Intermolecular haloamination reactions are challenging due to the high halenium affinity of the nitrogen atom. This is circumvented by using acetonitrile as an attenuated nucleophile, resulting in an enantioselective halo-Ritter reaction.![]()
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Affiliation(s)
| | - Bardia Soltanzadeh
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | - Aritra Sarkar
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | | | - Richard J Staples
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
| | - Babak Borhan
- Michigan State University, Department of Chemistry East Lansing MI 48824 USA
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16
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Qi C, Force G, Gandon V, Lebœuf D. Hexafluoroisopropanol‐Promoted Haloamidation and Halolactonization of Unactivated Alkenes. Angew Chem Int Ed Engl 2020; 60:946-953. [DOI: 10.1002/anie.202010846] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/18/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Chenxiao Qi
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
| | - Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168 Ecole Polytechnique Institut Polytechnique de Paris 91128 Palaiseau France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) CNRS UMR 7006 Université de Strasbourg 67000 Strasbourg France
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17
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Qi C, Force G, Gandon V, Lebœuf D. Hexafluoroisopropanol‐Promoted Haloamidation and Halolactonization of Unactivated Alkenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010846] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chenxiao Qi
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
| | - Guillaume Force
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
| | - Vincent Gandon
- Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO) CNRS UMR 8182 Université Paris-Saclay 91405 Orsay France
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168 Ecole Polytechnique Institut Polytechnique de Paris 91128 Palaiseau France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS) CNRS UMR 7006 Université de Strasbourg 67000 Strasbourg France
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18
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Kaasik M, Kanger T. Supramolecular Halogen Bonds in Asymmetric Catalysis. Front Chem 2020; 8:599064. [PMID: 33195108 PMCID: PMC7609521 DOI: 10.3389/fchem.2020.599064] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 09/15/2020] [Indexed: 12/17/2022] Open
Abstract
Halogen bonding has received a significant increase in attention in the past 20 years. An important part of this interest has centered on catalytic applications of halogen bonding. Halogen bond (XB) catalysis is still a developing field in organocatalysis, although XB catalysis has outgrown its proof of concept phase. The start of this year witnessed the publication of the first example of a purely XB-based enantioselective catalytic reaction. While the selectivity can be improved upon, there are already plenty of examples in which halogen bonds, among other interactions, play a crucial role in the outcome of highly enantioselective reactions. This paper will give an overview of the current state of the use of XBs in catalytic stereoselective processes.
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Affiliation(s)
| | - Tõnis Kanger
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia
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19
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Jiang Q, Liang Y, Zhang Y, Zhao X. Chalcogenide-Catalyzed Intermolecular Electrophilic Thio- and Halofunctionalization of gem-Difluoroalkenes: Construction of Diverse Difluoroalkyl Sulfides and Halides. Org Lett 2020; 22:7581-7587. [PMID: 32966094 DOI: 10.1021/acs.orglett.0c02784] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Thio- and halodifluoromethylated compounds are an important class of compounds in medicinal chemistry and organic synthesis. Herein, we report a facile method for the construction of these compounds via chalcogenide-catalyzed intermolecular electrophilic thio- and halofunctionalization of gem-difluoroalkenes. Simple treatment of gem-difluoroalkenes with electrophilic sulfur/halogen reagents and various O- or N-nucleophiles affords diverse multifunctionalized thio- and halodifluoromethylated compounds. This reaction features a relatively broad substrate scope, good functional group tolerance, and mild reaction conditions.
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Affiliation(s)
- Quanbin Jiang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Yaoyu Liang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Yuanyuan Zhang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
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20
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Kostyuk A, Filimonchuk SL, Nazarenko K, Shvydenko T, Shvydenko K, Rusanov E, Tolmachev A. Synthesis of 3-Iodomethyl Sultams. Synlett 2020. [DOI: 10.1055/s-0040-1707227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A method for the synthesis of iodomethyl-substituted five-membered sultams has been developed. The sultams were synthesized by intramolecular iodoamination of alkenyl sulfamides. The method allows synthesis of N- and C-substituted sultams. NH-Sultams were prepared by acidic cleavage of the corresponding tert-butyl sultams that are readily available. Varying the length of alkenyl substituent at sulfamide it was shown that only five- and six-membered sultams could be prepared by this method. Neither four- nor seven-membered sultams were detected. The simple practical procedure and available starting materials make the variously substituted sultams readily available.
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Affiliation(s)
- Aleksandr Kostyuk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine
| | | | | | - Tetiana Shvydenko
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine
| | | | - Eduard Rusanov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine
| | - Andrei Tolmachev
- Department of Chemistry, Taras Shevchenko National University of Kyiv
- Enamine Ltd
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21
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Horibe T, Tsuji Y, Ishihara K. Halogen-Bonding Interaction between I 2 and N-Iodosuccinimide in Lewis Base-Catalyzed Iodolactonization. Org Lett 2020; 22:4888-4892. [PMID: 32484356 DOI: 10.1021/acs.orglett.0c01735] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The halogen-bonding interaction between I2 and N-iodosuccinimide (NIS) stabilized by a Lewis base (LB) has been explored. 1H NMR, nuclear Overhauser effect (NOE), and diffusion-ordered NMR spectroscopy (DOSY) suggest the generation of a 1:1:1 assembly, LB-I2-NIS. In contrast, when N-iodotrifluoromethanesulfonimide (INTf2) is used instead of NIS, LB-I5+-LB is generated. On the basis of these results in combination with density functional theory (DFT) calculations, we propose a mechanism for the formation of I2-NIS and the subsequent generation of an active iodinating species LB-I+.
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Affiliation(s)
- Takahiro Horibe
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yasutaka Tsuji
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
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22
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Nakamura T, Okuno K, Kaneko K, Yamanaka M, Shirakawa S. Chiral bifunctional sulfide-catalyzed asymmetric bromoaminocyclizations. Org Biomol Chem 2020; 18:3367-3373. [PMID: 32315021 DOI: 10.1039/d0ob00459f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A BINOL-derived chiral bifunctional sulfide catalyst bearing a phenylurea moiety was applied to enantioselective bromoaminocyclization reactions of 2-allylaniline derivatives, which provide optically active 2-substituted indoline products as important motifs for biologically active compounds. A protecting group on the nitrogen of the 2-allylaniline substrate was carefully optimized, and highly enantioselective reactions were achieved by employing the p-biphenylsulfonyl-protected substrates. The origin of the good level of enantioselectivity for the present bromoaminocyclization was also investigated on the basis of DFT calculations. The resultant optically active 2-(bromomethyl)indoline products could be transformed to various 2-substituted indolines with no loss of the optical purity.
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Affiliation(s)
- Takumi Nakamura
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
| | - Ken Okuno
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
| | - Kazuma Kaneko
- Department of Chemistry and Research Center for Smart Molecules, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
| | - Masahiro Yamanaka
- Department of Chemistry and Research Center for Smart Molecules, Faculty of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
| | - Seiji Shirakawa
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
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23
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Yousefi R, Sarkar A, Ashtekar KD, Whitehead DC, Kakeshpour T, Holmes D, Reed P, Jackson JE, Borhan B. Mechanistic Insights into the Origin of Stereoselectivity in an Asymmetric Chlorolactonization Catalyzed by (DHQD) 2PHAL. J Am Chem Soc 2020; 142:7179-7189. [PMID: 32202109 DOI: 10.1021/jacs.0c01830] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Electrophilic halofunctionalization reactions have undergone a resurgence sparked by recent discoveries in the field of catalytic asymmetric halocyclizations. To build mechanistic understanding of these asymmetric transformations, a toolbox of analytical methods has been deployed, addressing the roles of catalyst, electrophile (halenium donor), and nucleophile in determining rates and stereopreferences. The test reaction, (DHQD)2PHAL-catalyzed chlorocyclization of 4-arylpent-4-enoic acid with 1,3-dichloro-5,5-dimethylhydantoin (DCDMH), is revealed to be first order in catalyst and chlorenium ion donor and zero order in alkenoic acid substrate under synthetically relevant conditions. The simplest interpretation is that rapid substrate-catalyst binding precedes rate-limiting chlorenium attack, controlling the face selectivity of both chlorine attack and lactone closure. ROESY and DFT studies, aided by crystal structures of carboxylic acids bound by the catalyst, point to a plausible resting state of the catalyst-substrate complex predisposed for asymmetric chlorolactonization. As revealed by our earlier labeling studies, these findings suggest modes of binding in the (DHQD)2PHAL chiral pocket that explain the system's remarkable control over rate- and enantioselection-determining events. Though a comprehensive modeling analysis is beyond the scope of the present work, quantum chemical analysis of the fragments' interactions and candidate reaction paths point to a one-step concerted process, with the nucleophile playing a critical role in activating the olefin for concomitant electrophilic attack.
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Affiliation(s)
- Roozbeh Yousefi
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Aritra Sarkar
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Kumar Dilip Ashtekar
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Daniel C Whitehead
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Tayeb Kakeshpour
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Daniel Holmes
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Paul Reed
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - James E Jackson
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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24
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A concise total synthesis of (−)-γ-lycorane via an aromatic C H alkylation of unactivated secondary alkyl iodide. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Hua TB, Xiao C, Yang QQ, Chen JR. Recent advances in asymmetric synthesis of 2-substituted indoline derivatives. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.07.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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26
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Shahamat Z, Nemati F, Elhampour A. Highly effective oxidation of benzyl alcohols to benzaldehydes over a new hypervalent iodine(III) reagent with the polymeric framework and magnetic feature as reusable heterogeneous nanocatalyst. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2019.104415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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27
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Iida K, Ishida S, Watanabe T, Arai T. Disulfide-Catalyzed Iodination of Electron-Rich Aromatic Compounds. J Org Chem 2019; 84:7411-7417. [DOI: 10.1021/acs.joc.9b00769] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Keisuke Iida
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Molecular Chirality Research Center (MCRC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Shunsuke Ishida
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Molecular Chirality Research Center (MCRC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Takamichi Watanabe
- Nippoh Chemicals Co., Ltd. Neo Kawai Building, 8-15,4-Chome, Nihonbashi-Honchou,
Chuo-Ku, Tokyo 103-0023, Japan
| | - Takayoshi Arai
- Soft Molecular Activation Research Center (SMARC), Chiba Iodine Resource Innovation Center (CIRIC), Molecular Chirality Research Center (MCRC), and Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
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28
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Khatoon S, Vgenopoulou A, Naseer MM, Shirinfar B, Kariuki BM, Dege N, Ahmed N. Easy Access to Crystalline Indolines
via
Hydrogen Bond Transfer. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Saira Khatoon
- School of Chemistry Cardiff University Cardiff CF10 3AT UK
- Department of Chemistry Quaid‐i‐Azam University Islamabad 45320 Pakistan
| | | | | | | | | | - Necmi Dege
- Department of Physics Samsun Ondokuz Mayıs University Samsun 55139 Turkey
| | - Nisar Ahmed
- School of Chemistry Cardiff University Cardiff CF10 3AT UK
- School of Chemistry University of Bristol Bristol BS8 1TS UK
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29
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30
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Albano G, Morelli M, Lissia M, Aronica LA. Synthesis of Functionalised Indoline and Isoquinoline Derivatives through a Silylcarbocyclisation/Desilylation Sequence. ChemistrySelect 2019. [DOI: 10.1002/slct.201900524] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Martina Morelli
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Margherita Lissia
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Laura A. Aronica
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
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31
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Arai T, Horigane K, Watanabe O, Kakino J, Sugiyama N, Makino H, Kamei Y, Yabe S, Yamanaka M. Association of Halogen Bonding and Hydrogen Bonding in Metal Acetate-Catalyzed Asymmetric Halolactonization. iScience 2019; 12:280-292. [PMID: 30731356 PMCID: PMC6365408 DOI: 10.1016/j.isci.2019.01.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 12/26/2018] [Accepted: 01/18/2019] [Indexed: 12/24/2022] Open
Abstract
Cooperative activation using halogen bonding and hydrogen bonding works in metal-catalyzed asymmetric halolactonization. The Zn3(OAc)4-3,3'-bis(aminoimino)binaphthoxide (tri-Zn) complex catalyzes both asymmetric iodolactonization and bromolactonization. Carboxylic acid substrates are converted to zinc carboxylates on the tri-Zn complex, and the N-halosuccinimide (N-bromosuccinimide [NBS] or N-iodosuccinimide [NIS]) is activated by hydrogen bonding with the diamine unit of chiral ligand. Halolactonization is significantly enhanced by the addition of catalytic I2. Density functional theory calculations revealed that a catalytic amount of I2 mediates the alkene portion of the substrates and NIS to realize highly enantioselective iodolactonization. The tri-Zn catalyst activates both sides of the carboxylic acid and alkene moiety, so that asymmetric five-membered iodolactonization of prochiral diallyl acetic acids proceeded to afford the chiral γ-butyrolactones. In the total description of the catalytic cycle, iodolactonization using the NIS-I2 complex proceeds with the regeneration of I2, which enables the catalytic use of I2. The actual iodination reagent is I2 and not NIS.
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Affiliation(s)
- Takayoshi Arai
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan; Soft Molecular Activation Research Center (SMARC), Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan; Chiba Iodine Research Innovation Center (CIRIC), 1-33 Yayoi, Inage, Chiba 263-8522, Japan.
| | - Kodai Horigane
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Ohji Watanabe
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Junki Kakino
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Noriyuki Sugiyama
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Hiroki Makino
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi, Inage, Chiba 263-8522, Japan
| | - Yuto Kamei
- Department of Chemistry, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8588, Japan
| | - Shinnosuke Yabe
- Department of Chemistry, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8588, Japan
| | - Masahiro Yamanaka
- Department of Chemistry, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8588, Japan; Research Center for Smart Molecules, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8588, Japan.
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32
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Abstract
Organoselenium chemistry has become an important tool in synthetic and medicinal chemistry.
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33
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Yousefi R, Struble TJ, Payne JL, Vishe M, Schley ND, Johnston JN. Catalytic, Enantioselective Synthesis of Cyclic Carbamates from Dialkyl Amines by CO 2-Capture: Discovery, Development, and Mechanism. J Am Chem Soc 2018; 141:618-625. [PMID: 30582326 DOI: 10.1021/jacs.8b11793] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cyclic carbamates are a common feature of small-molecule therapeutics, offering a constrained hydrogen bond acceptor that is both polar and sterically small. Methods for their preparation most often focus first on amino alcohol synthesis and then reaction with phosgene or its equivalent. This report describes an enantioselective synthesis of cyclic carbamates in which carbon dioxide engages an unsaturated basic amine, facilitated by a bifunctional organocatalyst designed to stabilize a carbamic acid intermediate while activating it toward subsequent enantioselective carbon-oxygen bond formation. Six-membered cyclic carbamates are prepared in good yield with high levels of enantioselection, as constrained 1,3-amino alcohols featuring a chiral tertiary alcohol carbon. Spectroscopic analysis (NMR, DOSY) of various substrate-reagent combinations provides insight into the dominant species under the reaction conditions. Two peculiar requirements were identified to achieve highest consistency: a "Goldilocks" amount of water and the use of a noncrystalline form of the ligand. These atypical features of the final protocol notwithstanding, a diverse range of products could be prepared. Their functionalizations illustrate the versatility of the carbamates as precursors to enantioenriched small molecules.
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Affiliation(s)
- Roozbeh Yousefi
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Thomas J Struble
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Jenna L Payne
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Mahesh Vishe
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Nathan D Schley
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
| | - Jeffrey N Johnston
- Department of Chemistry and Vanderbilt Institute of Chemical Biology , Vanderbilt University , Nashville , Tennessee 37235 , United States
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34
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Singh FV, Kole PB, Mangaonkar SR, Shetgaonkar SE. Synthesis of spirocyclic scaffolds using hypervalent iodine reagents. Beilstein J Org Chem 2018; 14:1778-1805. [PMID: 30112083 PMCID: PMC6071689 DOI: 10.3762/bjoc.14.152] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 06/18/2018] [Indexed: 01/13/2023] Open
Abstract
Hypervalent iodine reagents have been developed as highly valuable reagents in synthetic organic chemistry during the past few decades. These reagents have been identified as key replacements of various toxic heavy metals in organic synthesis. Various synthetically and biologically important scaffolds have been developed using hypervalent iodine reagents either in stoichiometric or catalytic amounts. In addition, hypervalent iodine reagents have been employed for the synthesis of spirocyclic scaffolds via dearomatization processes. In this review, various approaches for the synthesis of spirocyclic scaffolds using hypervalent iodine reagents are covered including their stereoselective synthesis. Additionally, the applications of these reagents in natural product synthesis are also covered.
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Affiliation(s)
- Fateh V Singh
- Chemistry Division, School of Advanced Sciences (SAS), VIT University, Chennai Campus, Chennai-600 127, Tamil Nadu, India
| | - Priyanka B Kole
- Chemistry Division, School of Advanced Sciences (SAS), VIT University, Chennai Campus, Chennai-600 127, Tamil Nadu, India
| | - Saeesh R Mangaonkar
- Chemistry Division, School of Advanced Sciences (SAS), VIT University, Chennai Campus, Chennai-600 127, Tamil Nadu, India
| | - Samata E Shetgaonkar
- Chemistry Division, School of Advanced Sciences (SAS), VIT University, Chennai Campus, Chennai-600 127, Tamil Nadu, India
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35
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Horibe T, Tsuji Y, Ishihara K. Thiourea–I2 as Lewis Base–Lewis Acid Cooperative Catalysts for Iodochlorination of Alkene with In Situ-Generated I–Cl. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01565] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takahiro Horibe
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Yasutaka Tsuji
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan
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36
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Klosowski DW, Hethcox JC, Paull DH, Fang C, Donald JR, Shugrue CR, Pansick AD, Martin SF. Enantioselective Halolactonization Reactions using BINOL-Derived Bifunctional Catalysts: Methodology, Diversification, and Applications. J Org Chem 2018; 83:5954-5968. [PMID: 29717607 PMCID: PMC5984189 DOI: 10.1021/acs.joc.8b00490] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general protocol is described for inducing enantioselective halolactonizations of unsaturated carboxylic acids using novel bifunctional organic catalysts derived from a chiral binaphthalene scaffold. Bromo- and iodolactonization reactions of diversely substituted, unsaturated carboxylic acids proceed with high degrees of enantioselectivity, regioselectivity, and diastereoselectivity. Notably, these BINOL-derived catalysts are the first to induce the bromo- and iodolactonizations of 5-alkyl-4( Z)-olefinic acids via 5- exo mode cyclizations to give lactones in which new carbon-halogen bonds are created at a stereogenic center with high diastereo- and enantioselectivities. Iodolactonizations of 6-substituted-5( Z)-olefinic acids also occur via 6- exo cyclizations to provide δ-lactones with excellent enantioselectivities. Several notable applications of this halolactonization methodology were developed for desymmetrization, kinetic resolution, and epoxidation of Z-alkenes. The utility of these reactions is demonstrated by their application to a synthesis of precursors of the F-ring subunit of kibdelone C and to the shortest catalytic, enantioselective synthesis of (+)-disparlure reported to date.
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Affiliation(s)
- Daniel W. Klosowski
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | - J. Caleb Hethcox
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | | | | | | | | | - Andrew D. Pansick
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
| | - Stephen F. Martin
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712
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37
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Lu Y, Nakatsuji H, Okumura Y, Yao L, Ishihara K. Enantioselective Halo-oxy- and Halo-azacyclizations Induced by Chiral Amidophosphate Catalysts and Halo-Lewis Acids. J Am Chem Soc 2018; 140:6039-6043. [PMID: 29708750 DOI: 10.1021/jacs.8b02607] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Catalytic enantioselective halocyclization of 2-alkenylphenols and enamides have been achieved through the use of chiral amidophosphate catalysts and halo-Lewis acids. Density functional theory calculations suggested that the Lewis basicity of the catalyst played an important role in the reactivity and enantioselectivity. The resulting chiral halogenated chromans can be transformed to α-Tocopherol, α-Tocotrienol, Daedalin A and Englitazone in short steps. Furthermore, a halogenated product with an unsaturated side chain may provide polycyclic adducts under radical cyclization conditions.
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Affiliation(s)
- Yanhui Lu
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Hidefumi Nakatsuji
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Yukimasa Okumura
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Lu Yao
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
| | - Kazuaki Ishihara
- Graduate School of Engineering , Nagoya University , B2-3(611), Furo-cho , Chikusa, Nagoya 464-8603 , Japan
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38
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Tan X, Pan H, Tian H, Shi Y. Phosphine oxide-Sc(OTf)3 catalyzed enantioselective bromoaminocyclization of tri-substituted allyl N-tosylcarbamates. Sci China Chem 2018. [DOI: 10.1007/s11426-017-9192-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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39
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Nagao Y, Hisanaga T, Egami H, Kawato Y, Hamashima Y. Desymmetrization of Bisallylic Amides through Catalytic Enantioselective Bromocyclization with BINAP Monoxide. Chemistry 2017; 23:16758-16762. [PMID: 29044749 DOI: 10.1002/chem.201704847] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Indexed: 01/12/2023]
Abstract
We report the first desymmetrization of bisallylic amides by enantioselective bromocyclization with BINAP monoxide as a catalyst. Depending upon the substitution pattern of the alkene moieties, densely functionalized, optically active oxazoline or dihydrooxazine compounds were obtained in a highly stereoselective manner. The remaining alkene moiety was subjected to various functional group manipulations to afford a diverse array of chiral molecules with multiple stereogenic centers.
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Affiliation(s)
- Yoshihiro Nagao
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Tatsunari Hisanaga
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Hiromichi Egami
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Yuji Kawato
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan
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40
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Yu SN, Li YL, Deng J. Enantioselective Synthesis of 2-Bromomethyl Indolines via BINAP(S)-Catalyzed Bromoaminocyclization of Allyl Aniline. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700106] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Sheng-Nan Yu
- School of Pharmaceutical Science and Technology; Tianjin University; Tianjin 300072 People's Republic of China
| | - Yin-Long Li
- School of Pharmaceutical Science and Technology; Tianjin University; Tianjin 300072 People's Republic of China
| | - Jun Deng
- School of Pharmaceutical Science and Technology; Tianjin University; Tianjin 300072 People's Republic of China
- School of Pharmaceutical Sciences and Innovative Drug Research Centre; Chongqing University; 55 Daxuecheng South Road, Shapingba Chongqing 401331 People's Republic of China
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41
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Yang H, Fan GT, Zhou L, Chen J. Enantioselective Chloro-O-cyclization of UnsaturatedN-Tosylcarbamates. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601328] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Hui Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science; Northwest University; Xi'an 710127 People's Republic of China
| | - Guo-Tao Fan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science; Northwest University; Xi'an 710127 People's Republic of China
| | - Ling Zhou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science; Northwest University; Xi'an 710127 People's Republic of China
| | - Jie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science; Northwest University; Xi'an 710127 People's Republic of China
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42
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Soltanzadeh B, Jaganathan A, Yi Y, Yi H, Staples RJ, Borhan B. Highly Regio- and Enantioselective Vicinal Dihalogenation of Allyl Amides. J Am Chem Soc 2017; 139:2132-2135. [PMID: 28112919 PMCID: PMC7790169 DOI: 10.1021/jacs.6b09203] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report a highly regio-, diastereo- and enantioselective vicinal dihalogenation of allyl amides. E- and Z-alkenes with both aryl and alkyl substituents were compatible with this chemistry. This is the result of exquisite catalyst controlled regioselectivity enabling use of electronically unbiased substrates. The reaction employs commercially available catalysts and halenium sources along with cheap inorganic halide salts to affect this transformation. A preliminary effort to extend this chemistry to heterodihalogenation is also presented.
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Affiliation(s)
- Bardia Soltanzadeh
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Arvind Jaganathan
- Dow Agrosciences LLC, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Yi Yi
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Hajoon Yi
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Richard J. Staples
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Babak Borhan
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
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43
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Theodorou A, Kokotos CG. Green Organocatalytic Synthesis of Indolines and Pyrrolidines from Alkenes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601262] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Alexis Theodorou
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis 15771 Athens Greece
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry; Department of Chemistry; National and Kapodistrian University of Athens; Panepistimiopolis 15771 Athens Greece
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44
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Malmedy F, Wirth T. Cyclization of Malonate Derivatives with Iodine(III) Reagents. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Florence Malmedy
- School of Chemistry; Cardiff University; Park Place, Main Building CF10 3AT Cardiff UK
| | - Thomas Wirth
- School of Chemistry; Cardiff University; Park Place, Main Building CF10 3AT Cardiff UK
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45
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Malmedy F, Wirth T. Stereoselective Ketone Rearrangements with Hypervalent Iodine Reagents. Chemistry 2016; 22:16072-16077. [DOI: 10.1002/chem.201603022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Florence Malmedy
- School of Chemistry; Cardiff University; Park Place Main Building Cardiff CF10 3AT UK
| | - Thomas Wirth
- School of Chemistry; Cardiff University; Park Place Main Building Cardiff CF10 3AT UK
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46
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Sawamura Y, Ogura Y, Nakatsuji H, Sakakura A, Ishihara K. Enantioselective bromocyclization of 2-geranylphenols induced by chiral phosphite-urea bifunctional catalysts. Chem Commun (Camb) 2016; 52:6068-71. [PMID: 27020117 DOI: 10.1039/c6cc00229c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chiral phosphite-urea bifunctional catalysts have been developed for the enantioselective bromocyclization of 2-geranylphenols with N-bromophthalimide (NBP) for the first time. The chiral triaryl phosphite moiety activates NBP to generate a bromophosphonium ion. On the other hand, the urea moiety interacts with a hydroxyl group of the substrate through hydrogen bonding interactions. Enantioselectivity is effectively induced through two-point attractive interactions between the catalyst and the substrate.
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Affiliation(s)
- Yasuhiro Sawamura
- Graduate School of Engineering, Nagoya University, B2-3(611), Furo-cho, Chikusa, Nagoya 464-8603, Japan.
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47
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Pan H, Huang H, Liu W, Tian H, Shi Y. Phosphine Oxide-Sc(OTf)3 Catalyzed Highly Regio- and Enantioselective Bromoaminocyclization of (E)-Cinnamyl Tosylcarbamates. An Approach to a Class of Synthetically Versatile Functionalized Molecules. Org Lett 2016; 18:896-9. [PMID: 26894481 DOI: 10.1021/acs.orglett.5b03459] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A highly regio- and enantioselective bromoaminocyclization of (E)-cinnamyl tosylcarbamates catalyzed by a chiral phosphine oxide-Sc(OTf)3 complex is described. A wide variety of optically active aryl 5-bromo-1,3-oxazinan-2-ones can be obtained with high yield and enantioselectivity.
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Affiliation(s)
- Hongjie Pan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hu Huang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Weigang Liu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hua Tian
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yian Shi
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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48
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Mizar P, Niebuhr R, Hutchings M, Farooq U, Wirth T. Thioamination of Alkenes with Hypervalent Iodine Reagents. Chemistry 2016; 22:1614-7. [PMID: 26660291 PMCID: PMC4725223 DOI: 10.1002/chem.201504636] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 12/10/2015] [Indexed: 11/07/2022]
Abstract
An efficient thioamination of alkenes mediated by iodine(III) reagents is described. The use of different sulfur nucleophiles allows the flexible synthesis of 1,2-aminothiols from alkenes. By employing chiral iodine(III) reagents, a stereoselective version of the thioamination protocol has also been developed.
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Affiliation(s)
- Pushpak Mizar
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK), Fax
| | - Rebecca Niebuhr
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK), Fax
| | - Matthew Hutchings
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK), Fax
| | - Umar Farooq
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK), Fax
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Thomas Wirth
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK), Fax.
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49
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Brown M, Kumar R, Rehbein J, Wirth T. Enantioselective Oxidative Rearrangements with Chiral Hypervalent Iodine Reagents. Chemistry 2016; 22:4030-5. [PMID: 26800241 PMCID: PMC4797713 DOI: 10.1002/chem.201504844] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Indexed: 11/22/2022]
Abstract
A stereoselective hypervalent iodine‐promoted oxidative rearrangement of 1,1‐disubstituted alkenes has been developed. This practically simple protocol provides access to enantioenriched α‐arylated ketones without the use of transition metals from readily accessible alkenes.
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Affiliation(s)
- Michael Brown
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK
| | - Ravi Kumar
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK
| | - Julia Rehbein
- Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany
| | - Thomas Wirth
- School of Chemistry, Cardiff University, Park Place, Main Building, Cardiff, CF10 3AT, UK.
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50
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Li Z, Shi Y. Chiral Phosphine Oxide-Sc(OTf)3 Complex Catalyzed Enantioselective Bromoaminocyclization of 2-Benzofuranylmethyl N-Tosylcarbamates. Approach to a Novel Class of Optically Active Spiro Compounds. Org Lett 2015; 17:5752-5. [PMID: 26571147 DOI: 10.1021/acs.orglett.5b02817] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient enantioselective bromoaminocyclization of 2-benzofuranylmethyl N-tosylcarbamates catalyzed by a chiral phosphine oxide-Sc(OTf)(3) complex is described. A wide variety of optically active spiro benzofuran oxazolidinones can be obtained with high enantioselectivities.
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Affiliation(s)
- Zequan Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Yian Shi
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.,State Key Laboratory of Coordination Chemistry, Center for Multimolecular Organic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.,Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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