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Yoshimura G, Sakamoto J, Kitajima M, Ishikawa H. Indole C5-Selective Bromination of Indolo[2,3-a]quinolizidine Alkaloids via In Situ-Generated Indoline Intermediate. Chemistry 2024; 30:e202401153. [PMID: 38584124 DOI: 10.1002/chem.202401153] [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: 03/22/2024] [Revised: 04/05/2024] [Accepted: 04/07/2024] [Indexed: 04/09/2024]
Abstract
There are many indole alkaloids that contain diverse functional groups attached to the benzene ring on the indole core. Promising biological activities of these alkaloids have been reported. Herein, we report the indole C5-selective bromination of indolo[2,3-a]quinolizidine alkaloids by adding nearly equimolar amounts of Br3 ⋅ PyH and HCl in MeOH. The resulting reaction plausibly proceeds through an indoline intermediate by the nucleophilic addition of MeOH to the C3-brominated indolenine intermediate. Data support the intermediacy of a C3-, C5-dibrominated indolenine intermediate as a brominating agent. These conditions demonstrate excellent selectivity for indole C5 bromination of natural products and their derivatives. Thus, these simple, mild, and metal-free conditions allow for selective, late-stage bromination followed by further chemical modifications. The utility of the brominated product prepared from naturally occurring yohimbine was demonstrated through various derivatizations, including a bioinspired heterodimerization reaction.
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Affiliation(s)
- Go Yoshimura
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, 260-8675, Chiba, Japan
| | - Jukiya Sakamoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, 260-8675, Chiba, Japan
| | - Mariko Kitajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, 260-8675, Chiba, Japan
| | - Hayato Ishikawa
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, 260-8675, Chiba, Japan
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Ciriminna R, Pagliaro M. Shape and Stability Matter: Enhanced Catalytic Reactions via Sol-gel-Entrapped Catalysts. Top Curr Chem (Cham) 2023; 381:5. [PMID: 36542195 PMCID: PMC9768397 DOI: 10.1007/s41061-022-00415-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 11/18/2022] [Indexed: 12/24/2022]
Abstract
The possibility to tune the solid catalyst morphology and the unique chemical and physical stability of organosilica-entrapped sol-gel catalysts allow the application of these catalysts to the synthesis of a wide variety of valued molecules, including polymers, manufactured by the fine-chemical industry. Referring to selected independent research achievements, we provide a practice oriented insight on these materials that will hopefully be useful in new, unified catalysis education aimed to foster the uptake of heterogeneous catalysis in the fine and specialty chemical industry.
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Affiliation(s)
- Rosaria Ciriminna
- Istituto Per Lo Studio Dei Materiali Nanostrutturati, CNR, Via U. La Malfa 153, 90146, Palermo, Italy.
| | - Mario Pagliaro
- Istituto Per Lo Studio Dei Materiali Nanostrutturati, CNR, Via U. La Malfa 153, 90146, Palermo, Italy.
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Zhang J, Shi SQ, Hao WJ, Dong GY, Tu SJ, Jiang B. Tunable Electrocatalytic Annulations of o-Arylalkynylanilines: Green and Switchable Syntheses of Skeletally Diverse Indoles. J Org Chem 2021; 86:15886-15896. [PMID: 33534572 DOI: 10.1021/acs.joc.0c02898] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Tunable electrocatalytic annulation reactions of o-arylalkynylanilines have been established, leading to green and divergent syntheses of skeletally diverse indoles by adjusting the electrolytes and the solvents. The presence of ammonium halides as the electrolytes enabled the halogenation of o-arylalkynylanilines to give C3-halogenated indoles whereas naphtho[1',2':4,5]furo[3,2-b]indoles could be obtained by changing the electrolyte from ammonium halides to KI. Interestingly, by combining acetone as the solvent and both NH4I and NH4Cl as the electrolytes, the reaction worked through an intramolecular annulation and [5 + 1] cyclization cascade to form naphtho[1',2':5,6][1,3]oxazino[3,4-a]indoles.
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Affiliation(s)
- Jie Zhang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Shao-Qing Shi
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Guo-Yun Dong
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P.R. China
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Mohajer F, Heravi MM, Zadsirjan V, Poormohammad N. Copper-free Sonogashira cross-coupling reactions: an overview. RSC Adv 2021; 11:6885-6925. [PMID: 35423221 PMCID: PMC8695108 DOI: 10.1039/d0ra10575a] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/03/2021] [Indexed: 11/25/2022] Open
Abstract
The Sonogashira reaction is a cross-coupling reaction of a vinyl or aryl halide with a terminal alkyne to form a C-C bond. In its original form, the Sonogashira reaction is performed with a palladium species as a catalyst while co-catalyzed by a copper species and a phosphine or amine. The reaction is conducted under mild conditions, i.e., room temperature, aqueous solutions, and the presence of mild bases. Undeniably, the Sonogashira reaction is among the most competent and efficient reactions widely used in organic synthesis. This named reaction has proved useful in many organic synthesis areas, including the synthesis of pharmaceuticals, heterocycles, natural products, organic compounds, complex molecules having biological activities, nanomaterials, and many more materials that we use in our daily lives. The presence of transition metals as a catalyst was indeed essential in the Sonogashira reaction. However, recently, the reaction has been successfully conducted without copper as a co-catalyst and phosphines or amines as bases. In this critical review, we have focused on developments in the Sonogashira reaction successfully performed in the absence of copper complexes, phosphines or amines, which could be of particular advantage in implementing green chemistry principles and making the reactions more achievable from an economic viewpoint.
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Affiliation(s)
- Fatemeh Mohajer
- Department of Physics and Chemistry, School of Science, Alzahra University PO Box 1993891176, Vanak Tehran Iran +98 21 88041344 +98 21 88044051
| | - Majid M Heravi
- Department of Physics and Chemistry, School of Science, Alzahra University PO Box 1993891176, Vanak Tehran Iran +98 21 88041344 +98 21 88044051
| | - Vahideh Zadsirjan
- Department of Physics and Chemistry, School of Science, Alzahra University PO Box 1993891176, Vanak Tehran Iran +98 21 88041344 +98 21 88044051
| | - Nargess Poormohammad
- Department of Physics and Chemistry, School of Science, Alzahra University PO Box 1993891176, Vanak Tehran Iran +98 21 88041344 +98 21 88044051
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Liu D, Zhu Y, Gu S, Chen F. Application of Flow Chemistry in Halogenation. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202007051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kandasamy M, Huang YH, Ganesan B, Senadi GC, Lin WY. In Situ Generation of Alkynylzinc and Its Subsequent Negishi Reaction in a Flow Reactor. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mohanraj Kandasamy
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Yu- Hsuan Huang
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Balaji Ganesan
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Gopal Chandru Senadi
- Department of Chemistry; Faculty of Engineering and Technology; SRM Institute of Science and Technology; 603203 Kattankulathur Chennai India
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
- Department of Medical Research; Kaohsiung Medical University Hospital; 807 Kaohsiung Taiwan
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Ichitsuka T, Suzuki N, Sairenji M, Koumura N, Onozawa S, Sato K, Kobayashi S. Readily Available Immobilized Pd Catalysts for Suzuki‐Miyaura Coupling under Continuous‐flow Conditions. ChemCatChem 2019. [DOI: 10.1002/cctc.201900085] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tomohiro Ichitsuka
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Naoto Suzuki
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Masaki Sairenji
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Nagatoshi Koumura
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Shun‐ya Onozawa
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
| | - Shū Kobayashi
- Interdisciplinary Research Center for Catalytic ChemistryNational Institute of Advanced Industrial Science and Technology Central 5, Higashi 1-1-1 Tsukuba, Ibaraki 305-8565 Japan
- Department of Chemistry, School of ScienceThe University of Tokyo Hongo, Bunkyo-ku, Tokyo 113-0033 Japan
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Cantillo D, Kappe CO. Halogenation of organic compounds using continuous flow and microreactor technology. REACT CHEM ENG 2017. [DOI: 10.1039/c6re00186f] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Halogenation reactions involving highly reactive halogenating agents can be performed safely and with improved efficiency and selectivity under continuous flow conditions.
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Affiliation(s)
- David Cantillo
- Institute of Chemistry
- University of Graz
- Graz
- Austria
- Research Center Pharmaceutical Engineering GmbH (RCPE)
| | - C. Oliver Kappe
- Institute of Chemistry
- University of Graz
- Graz
- Austria
- Research Center Pharmaceutical Engineering GmbH (RCPE)
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D’Attoma J, Camara T, Brun PL, Robin Y, Bostyn S, Buron F, Routier S. Efficient Transposition of the Sandmeyer Reaction from Batch to Continuous Process. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00318] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Joseph D’Attoma
- Institut de Chimie
Organique et Analytique, Univ Orleans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 CEDEX 2 Orléans, France
| | - Titi Camara
- ISOCHEM, 4 Rue Marc Sangnier, BP 16729, 45300 Pithiviers, France
| | | | - Yves Robin
- ISOCHEM, 4 Rue Marc Sangnier, BP 16729, 45300 Pithiviers, France
| | - Stéphane Bostyn
- Institut de Combustion,
Aérothermique, Réactivité, et Environnement (ICARE), 1c, Avenue de la Recherche Scientifique, 45071 CEDEX 2 Orléans, France
| | - Frédéric Buron
- Institut de Chimie
Organique et Analytique, Univ Orleans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 CEDEX 2 Orléans, France
| | - Sylvain Routier
- Institut de Chimie
Organique et Analytique, Univ Orleans, UMR CNRS 7311, Rue de Chartres, BP 6759, 45067 CEDEX 2 Orléans, France
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Rodrigues N, Boiaryna L, Vercouillie J, Guilloteau D, Suzenet F, Buron F, Routier S. Tandem Silver-Catalyzed Cyclization/Nucleophilic Functionalization of 2-Alkynylindole-3-carbaldehyde Oximes to Afford New 2,4-Disubstituted γ-Carbolines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600904] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | | | - Johnny Vercouillie
- UMR Inserm U930; Université François Rabelais de Tours, CHRU de Tours; Tours France
| | - Denis Guilloteau
- UMR Inserm U930; Université François Rabelais de Tours, CHRU de Tours; Tours France
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