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Itoh K, Nagao SI, Tokunaga K, Hirayama S, Karaki F, Mizuguchi T, Nagai K, Sato N, Suzuki M, Hashimoto M, Fujii H. Visible-Light-Induced Synthesis of 1,2,3,4-Tetrahydroquinolines through Formal [4+2] Cycloaddition of Acyclic α,β-Unsaturated Amides and Imides with N,N-Dialkylanilines. Chemistry 2021; 27:5171-5179. [PMID: 33300620 DOI: 10.1002/chem.202004186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/05/2020] [Indexed: 01/01/2023]
Abstract
1,2,3,4-Tetrahydroquinolines should be applicable to the development of new pharmaceutical agents. A facile synthesis of 1,2,3,4-tetrahydroquinolines that is achieved by a photoinduced formal [4+2] cycloaddition reaction of acyclic α,β-unsaturated amides and imides with N,N-dialkylanilines under visible-light irradiation, in which a new IrIII complex photosensitizer, a thiourea, and an oxidant act cooperatively in promoting the reaction, is reported. The photoreaction enables the synthesis of a wide variety of 1,2,3,4-tetrahydroquinolines, while controlling the trans/cis diastereoselectivity (>99:1) and constructing contiguous stereogenic centers. A chemoselective cleavage of an acyclic imide auxiliary is demonstrated.
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Affiliation(s)
- Kennosuke Itoh
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Shun-Ichi Nagao
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Ken Tokunaga
- Division of Liberal Arts, Center for Promotion of Higher Education, Kogakuin University, Tokyo, 192-0015, Japan
| | - Shigeto Hirayama
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Fumika Karaki
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Takaaki Mizuguchi
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Kenichiro Nagai
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Noriko Sato
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
| | - Mitsuaki Suzuki
- Department of Chemistry, Faculty of Science, Josai University, Saitama, 350-0295, Japan
| | - Masashi Hashimoto
- Department of Chemistry, Faculty of Science, Josai University, Saitama, 350-0295, Japan
| | - Hideaki Fujii
- Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan.,Medicinal Research Laboratories, School of Pharmacy, Kitasato University, Tokyo, 108-8641, Japan
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2
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García-Lacuna J, Domínguez G, Pérez-Castells J. Flow Chemistry for Cycloaddition Reactions. CHEMSUSCHEM 2020; 13:5138-5163. [PMID: 32662578 DOI: 10.1002/cssc.202001372] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Continuous flow reactors form part of a rapidly growing research area that has changed the way synthetic chemistry is performed not only in academia but also at the industrial level. This Review highlights the most recent advances in cycloaddition reactions performed in flow systems. Cycloadditions are atom-efficient transformations for the synthesis of carbo- and heterocycles, involved in the construction of challenging skeletons of complex molecules. The main advantages of translating these processes into flow include using intensified conditions, safer handling of hazardous reagents and gases, easy tuning of reaction conditions, and straightforward scaling up. These benefits are especially important in cycloadditions such as the copper(I)-catalyzed azide alkyne cycloaddition (CuAAC), Diels-Alder reaction, ozonolysis and [2+2] photocycloadditions. Some of these transformations are key reactions in the industrial synthesis of pharmaceuticals.
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Affiliation(s)
- Jorge García-Lacuna
- Department of Chemistry and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities Urbanización Montepríncipe, 28660, Boadilla del Monte, Madrid, Spain
| | - Gema Domínguez
- Department of Chemistry and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities Urbanización Montepríncipe, 28660, Boadilla del Monte, Madrid, Spain
| | - Javier Pérez-Castells
- Department of Chemistry and Biochemistry, Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities Urbanización Montepríncipe, 28660, Boadilla del Monte, Madrid, Spain
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3
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Affiliation(s)
- Thomas H. Rehm
- Division Energy & Chemical Technology / Flow Chemistry GroupFraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Straße 18–20 55129 Mainz Germany
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4
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Sutyak KB, Lee W, Zavalij PV, Gutierrez O, Davis JT. Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G-Quadruplex. Angew Chem Int Ed Engl 2018; 57:17146-17150. [PMID: 30395701 DOI: 10.1002/anie.201811202] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/08/2022]
Abstract
We describe a templating/covalent capture strategy that enables photochemical formation of 8 cyclobutanes in one noncovalent assembly. This process was characterized by experiment and quantum mechanical/molecular mechanics (ONIOM) calculations. Thus, KI and 16 units of 5'-cinnamate guanosine form a G-quadruplex where C=C π bonds in neighboring G4 -quartets are separated by 3.3 Å, enabling [2+2] photocycloaddition in solution. This reaction is high-yielding (>90 %), regio- and diastereoselective. Since all components are in dynamic equilibrium this photocycloaddition is catalytic in K+ .
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Affiliation(s)
- Keith B Sutyak
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Wes Lee
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Peter V Zavalij
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Osvaldo Gutierrez
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
| | - Jeffery T Davis
- Department of Chemistry and Biotechnology, University of Maryland, College Park, MD, 20742, USA
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5
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Lei T, Zhou C, Wei XZ, Yang B, Chen B, Tung CH, Wu LZ. Construction of Cyclobutanes by Multicomponent Cascade Reactions in Homogeneous Solution through Visible-Light Catalysis. Chemistry 2018; 25:879-884. [PMID: 30315713 DOI: 10.1002/chem.201804946] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Indexed: 01/23/2023]
Abstract
[2+2] Photocycloaddition of two olefins is a general method to assemble the core scaffold, cyclobutane, found in numerous bioactive molecules. A new approach to synthesize cyclobutanes through multicomponent cascade reactions by merging aldol reaction and Witting reaction with visible-light-induced [2+2] cycloaddition is reported. An array of cyclobutanes with high selectivity has been achieved from commercially available aldehydes, ketones (or phosphorus ylide), and olefins with visible-light irradiation of a catalytic amount of (fac-tris(2-phenylpyridinato-C2 ,N)iridium) ([Ir(ppy)3 ]) at room temperature. Control experiments and spectroscopic studies revealed that the triplet-triplet energy transfer from the excited [Ir(ppy)3 ]* to enones, generated in situ from aldehyde and ketone or aldehyde and phosphorus ylide, is responsible for these simple and efficient muticomponent transformations.
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Affiliation(s)
- Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiang-Zhu Wei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bing Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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6
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Sutyak KB, Lee W, Zavalij PV, Gutierrez O, Davis JT. Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G‐Quadruplex. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Keith B. Sutyak
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Wes Lee
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Peter V. Zavalij
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Osvaldo Gutierrez
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
| | - Jeffery T. Davis
- Department of Chemistry and Biotechnology University of Maryland College Park MD 20742 USA
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7
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Hu FL, Mi Y, Zhu C, Abrahams BF, Braunstein P, Lang JP. Stereoselective Solid-State Synthesis of Substituted Cyclobutanes Assisted by Pseudorotaxane-like MOFs. Angew Chem Int Ed Engl 2018; 57:12696-12701. [PMID: 30109769 DOI: 10.1002/anie.201806076] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Revised: 08/12/2018] [Indexed: 12/12/2022]
Abstract
Regioselective photodimerization of trans-4-styrylpyridine (4-spy) derivatives is performed using pseudorotaxane-like Zn-based metal organic frameworks MOFs as templates. The formation of rctt-HT (head-to-tail) dimers is achieved by confining pairs of coordinated 4-spy derivative ligands within hexagonal windows and then irradiating them with UV light. It is also possible to achieve a photodimerization reaction where two different substituted 4-spy ligands are included in such a MOF material. The ether bond formation is employed to protect the sensitive -OH group of HO-spy and the methyl group of CH3 O-spy is subsequently removed after the formation of cyclobutane derivative in the CH3 O-spy-based MOF. Introducing substituents at the 2- or 3-position of the phenyl group of 4-spy does not significantly affect the rate of the dimerization process except in the case of the strongly electron-withdrawing nitro group where the rate is significantly decreased. These results are in striking contrast to the mixtures of photoproducts and low yields obtained by untemplated photodimerization in organic solvents.
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Affiliation(s)
- Fei-Long Hu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, No.199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China.,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning, 530006, P. R. China
| | - Yan Mi
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning, 530006, P. R. China
| | - Chen Zhu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, No.199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China
| | | | - Pierre Braunstein
- Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4, rue Blaise Pascal-CS 90032, 67081, Strasbourg, France
| | - Jian-Ping Lang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, No.199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China
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8
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Hu FL, Mi Y, Zhu C, Abrahams BF, Braunstein P, Lang JP. Stereoselective Solid-State Synthesis of Substituted Cyclobutanes Assisted by Pseudorotaxane-like MOFs. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806076] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Fei-Long Hu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; No.199 RenAi Road Suzhou 215123 Jiangsu P. R. China
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products; Guangxi University for Nationalities; Nanning 530006 P. R. China
| | - Yan Mi
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products; Guangxi University for Nationalities; Nanning 530006 P. R. China
| | - Chen Zhu
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; No.199 RenAi Road Suzhou 215123 Jiangsu P. R. China
| | | | - Pierre Braunstein
- Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4, rue Blaise Pascal-CS 90032 67081 Strasbourg France
| | - Jian-Ping Lang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; No.199 RenAi Road Suzhou 215123 Jiangsu P. R. China
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9
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Telmesani R, White JAH, Beeler AB. Liquid‐Liquid Slug‐Flow‐Accelerated [2+2] Photocycloaddition of Cinnamates. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800081] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Reem Telmesani
- Department of Chemistry Boston University 590 Commonwealth Ave Boston, MA 02215 USA
| | - Jada A. H. White
- Department of Chemistry Boston University 590 Commonwealth Ave Boston, MA 02215 USA
| | - Aaron B. Beeler
- Department of Chemistry Boston University 590 Commonwealth Ave Boston, MA 02215 USA
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10
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Lei T, Zhou C, Huang MY, Zhao LM, Yang B, Ye C, Xiao H, Meng QY, Ramamurthy V, Tung CH, Wu LZ. General and Efficient Intermolecular [2+2] Photodimerization of Chalcones and Cinnamic Acid Derivatives in Solution through Visible-Light Catalysis. Angew Chem Int Ed Engl 2017; 56:15407-15410. [PMID: 28994229 DOI: 10.1002/anie.201708559] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Indexed: 01/26/2023]
Abstract
[2+2] Photocycloaddition, for example, the dimerization of chalcones and cinnamic acid derivatives, is a unique strategy to construct cyclobutanes, which are building blocks for a variety of biologically active molecules and natural products. However, most attempts at the above [2+2] addition have focused on solid-state, molten-state, or host-guest systems under ultraviolet-light irradiation in order to overcome the competition of facile geometric isomerization of nonrigid olefins. We report a general and simple method to realize the intermolecular [2+2] dimerization reaction of these acyclic olefins to construct cyclobutanes in a highly regio- and diastereoselective manner in solution under visible light, which provides an efficient solution to a long-standing problem.
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Affiliation(s)
- Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Mao-Yong Huang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Lei-Min Zhao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Bing Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Chen Ye
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Hongyan Xiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Qing-Yuan Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | | | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, The Chinese Academy of Sciences, Beijing, 100190, P. R. China
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11
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Lei T, Zhou C, Huang M, Zhao L, Yang B, Ye C, Xiao H, Meng Q, Ramamurthy V, Tung C, Wu L. General and Efficient Intermolecular [2+2] Photodimerization of Chalcones and Cinnamic Acid Derivatives in Solution through Visible‐Light Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708559] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Tao Lei
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Chao Zhou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Mao‐Yong Huang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Lei‐Min Zhao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Bing Yang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Chen Ye
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Hongyan Xiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Qing‐Yuan Meng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | | | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences The Chinese Academy of Sciences Beijing 100190 P. R. China
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12
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Kim H, Inoue K, Yoshida JI. Harnessing [1,4], [1,5], and [1,6] Anionic Fries-type Rearrangements by Reaction-Time Control in Flow. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Heejin Kim
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Keita Inoue
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
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13
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Kim H, Inoue K, Yoshida JI. Harnessing [1,4], [1,5], and [1,6] Anionic Fries-type Rearrangements by Reaction-Time Control in Flow. Angew Chem Int Ed Engl 2017; 56:7863-7866. [DOI: 10.1002/anie.201704006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Heejin Kim
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Keita Inoue
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University, Nishikyo-ku; Kyoto 615-8510 Japan
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14
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Panish RA, Chintala SR, Fox JM. A Mixed-Ligand Chiral Rhodium(II) Catalyst Enables the Enantioselective Total Synthesis of Piperarborenine B. Angew Chem Int Ed Engl 2016; 55:4983-7. [PMID: 26991451 PMCID: PMC4900183 DOI: 10.1002/anie.201600766] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Indexed: 12/19/2022]
Abstract
A novel, mixed-ligand chiral rhodium(II) catalyst, Rh2(S-NTTL)3(dCPA), has enabled the first enantioselective total synthesis of the natural product piperarborenine B. A crystal structure of Rh2(S-NTTL)3(dCPA) reveals a "chiral crown" conformation with a bulky dicyclohexylphenyl acetate ligand and three N-naphthalimido groups oriented on the same face of the catalyst. The natural product was prepared on large scale using rhodium-catalyzed bicyclobutanation/ copper-catalyzed homoconjugate addition chemistry in the key step. The route proceeds in ten steps with an 8% overall yield and 92% ee.
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Affiliation(s)
- Robert A Panish
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, 19716, USA
| | - Srinivasa R Chintala
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, 19716, USA
| | - Joseph M Fox
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, 19716, USA.
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15
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Panish RA, Chintala SR, Fox JM. A Mixed‐Ligand Chiral Rhodium(II) Catalyst Enables the Enantioselective Total Synthesis of Piperarborenine B. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600766] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert A. Panish
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
| | | | - Joseph M. Fox
- Department of Chemistry and Biochemistry University of Delaware Newark DE 19716 USA
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