1
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Hikawa H, Fukuda A, Kondo K, Nakayama T, Enda T, Kikkawa S, Azumaya I. Au(III)/TPPMS-catalyzed Friedel-Crafts benzylation of deactivated N-alkylanilines in water. Org Biomol Chem 2024; 22:7874-7879. [PMID: 39235437 DOI: 10.1039/d4ob01234h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
The Friedel-Crafts reaction of electronically deactivated anilines including those with strong electron-withdrawing NO2, CN or CO2H groups is challenging due to the reduced electron density of the aromatic ring. Here, we demonstrate the Au(III)/TPPMS-catalyzed Friedel-Crafts benzylation of deactivated anilines in water. This reaction exhibits operational simplicity and a broad substrate scope with high regioselectivity, enabling rapid access to 2-benzylanilines.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Akane Fukuda
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Kazuma Kondo
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Taku Nakayama
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Tomokatsu Enda
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan.
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2
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Patel MA, Kapdi AR. Ubiquitous Role of Phosphine-Based Water-Soluble Ligand in Promoting Catalytic Reactions in Water. CHEM REC 2024; 24:e202400057. [PMID: 39162777 DOI: 10.1002/tcr.202400057] [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: 06/26/2024] [Indexed: 08/21/2024]
Abstract
Catalysis has been at the forefront of the developments that has revolutionised synthesis and provided the impetus in the discovery of platform technologies for efficient C-C or C-X bond formation. Current environmental situation however, demands a change in strategy with catalysis being promoted more in solvents that are benign (Water) and for that the development of hydrophilic ligands (especially phosphines) is a necessity which could promote catalytic reactions in water, allow recyclability of the catalytic solutions and make it possible to isolate products using column-free techniques that involve lesser usage of hazardous organic solvents. In this review, we therefore critically analyse such catalytic processes providing examples that do follow the above-mentioned parameter.
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Affiliation(s)
- Manisha A Patel
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai, 400019, India
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh road, Matunga, Mumbai, 400019, India
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3
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Cook A, Newman SG. Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions. Chem Rev 2024; 124:6078-6144. [PMID: 38630862 DOI: 10.1021/acs.chemrev.4c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods for their functionalization require them to first be converted into a more activated derivative, while recent years have seen a vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can be used toward this goal. These transformations are broadly classified into three categories. Deoxygenative functionalizations, representing derivatization of the C-O bond, enable the alcohol to act as a leaving group toward the formation of new C-C bonds. Etherifications, characterized by derivatization of the O-H bond, represent classical reactivity that has been modernized to include mild reaction conditions, diverse reaction partners, and high selectivities. Lastly, chain functionalization reactions are described, wherein the alcohol group acts as a mediator in formal C-H functionalization reactions of the alkyl backbone. Each of these three classes of transformation will be discussed in context of intermolecular arylation, alkylation, and related reactions, illustrating how catalysis can enable alcohols to be directly harnessed for organic synthesis.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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4
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Wang T, Li Z, Gao H, Hu J, Chen HY, Xu JJ. Ultrafast C-C and C-N bond formation reactions in water microdroplets facilitated by the spontaneous generation of carbocations. Chem Sci 2023; 14:11515-11520. [PMID: 37886101 PMCID: PMC10599473 DOI: 10.1039/d3sc03870j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/24/2023] [Indexed: 10/28/2023] Open
Abstract
Carbocations are important electrophilic intermediates in organic chemistry, but their formation typically requires harsh conditions such as extremely low pH, elevated temperature, strong oxidants and/or expensive noble-metal catalysts. Herein, we report the spontaneous generation of highly reactive carbocations in water microdroplets by simply spraying a diarylmethanol aqueous solution. The formation of transient carbocations as well as their ultrafast in-droplet transformations through carbocation-involved C-C and C-N bond formation reactions are directly characterized by mass spectrometry. The intriguing formation and stabilization of carbocations are attributed to the super acidity of the positively charged water microdroplets as well as the high electric fields at the water-air interfaces. Without the utilization of external acids as catalysts, we believe that these microdroplet reactions would pose a new and sustainable way for the construction of aryl-substituted compounds.
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Affiliation(s)
- Ting Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Zheng Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Hang Gao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Jun Hu
- School of Life Sciences and Health Engineering, Jiangnan University Wuxi 214122 China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 P. R. China
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5
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Visible light mediated Iron-Catalyzed synthesis of C-3 alkylated Indoles, bisindolylmethanes and flavanones using alcohols. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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6
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Pang Q, Zuo WF, Zhang Y, Li X, Han B. Recent Advances on Direct Functionalization of Indoles in Aqueous Media. CHEM REC 2023; 23:e202200289. [PMID: 36722727 DOI: 10.1002/tcr.202200289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/15/2023] [Indexed: 02/02/2023]
Abstract
Indoles and their derivatives have dominated a significant proportion of nitrogen-containing heterocyclic compounds and play an essential role in synthetic and medicinal chemistry, pesticides, and advanced materials. Compared with conventional synthetic strategies, direct functionalization of indoles provides straightforward access to construct diverse indole scaffolds. As we enter an era emphasizing green and sustainable chemistry, utilizing environment-friendly solvents represented by water demonstrates great potential in synthesizing valuable indole derivatives. This review aims to depict the critical aspects of aqueous-mediated indoles functionalization over the past decade and discusses the future challenges and prospects in this fast-growing field. For the convenience of readers, this review is classified into three parts according to the bonding modes (C-C, C-N, and C-S bonds), which focus on the diversity of indole derivatives, the prominent role of water in the chemical process, and the types of catalyst systems and mechanisms. We hope this review can promote the sustainable development of the direct functionalization of indoles and their derivatives and the discovery of novel and practical organic methods in aqueous phase.
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Affiliation(s)
- Qiwen Pang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Wei-Fang Zuo
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yang Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Xiang Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Bo Han
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
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7
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Wu J, Tongdee S, Cordier M, Darcel C. Selective Iron Catalyzed Synthesis of N-Alkylated Indolines and Indoles. Chemistry 2022; 28:e202201809. [PMID: 35700072 PMCID: PMC9796591 DOI: 10.1002/chem.202201809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Indexed: 01/01/2023]
Abstract
Whereas iron catalysts usually promote catalyzed C3-alkylation of indole derivatives via a borrowing-hydrogen methodology using alcohols as the electrophilic partners, this contribution shows how to switch the selectivity towards N-alkylation. Thus, starting from indoline derivatives, N-alkylation was efficiently performed using a tricarbonyl(cyclopentadienone) iron complex as the catalyst in trifluoroethanol in the presence of alcohols leading to the corresponding N-alkylated indoline derivatives in 31-99 % yields (28 examples). The one-pot, two-step strategy for the selective N-alkylation of indolines is completed by an oxidation to give the corresponding N-alkylated indoles in 31-90 % yields (15 examples). This unprecedented oxidation methodology involves an iron salt catalyst associated with (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) and a stoichiometric amount of t-BuOOH at room temperature.
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Affiliation(s)
- Jiajun Wu
- Univ RennesCNRSISCR (Institut des Sciences Chimiques de Rennes) UMR 622635000RennesFrance
| | - Satawat Tongdee
- Univ RennesCNRSISCR (Institut des Sciences Chimiques de Rennes) UMR 622635000RennesFrance
| | - Marie Cordier
- Univ RennesCNRSISCR (Institut des Sciences Chimiques de Rennes) UMR 622635000RennesFrance
| | - Christophe Darcel
- Univ RennesCNRSISCR (Institut des Sciences Chimiques de Rennes) UMR 622635000RennesFrance
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8
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Yashwantrao G, Shetty P, Maleikal PJ, Badani P, Saha S. Dehydrative Substitution Reaction in Water for the Preparation of Unsymmetrically Substituted Triarylmethanes: Synthesis, Aggregation‐Enhanced Emission, and Mechanofluorochromism. Chempluschem 2022; 87:e202200150. [DOI: 10.1002/cplu.202200150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/06/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Gauravi Yashwantrao
- ICT Mumbai: Institute of Chemical Technology Speciality Chemicals Technology INDIA
| | - Prapti Shetty
- Institute of Chemical Technology Speciality Chemicals Technology INDIA
| | | | - Purav Badani
- University of Mumbai - Kalina Campus Chemistry INDIA
| | - Satyajit Saha
- Institute of Chemical Technology, Mumbai Department of Dyestuff Technology Nathelal parekh Marg400019India 400019 Matunga, 2010 INDIA
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9
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Singh P, Peddinti RK. In situ generated superacid BF3–H2O catalyzed alkylation of p-quinols with diaryl carbinols leading to triarylmethanes. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02054-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Mondal A, Sharma R, Dutta B, Pal D, Srimani D. Well-Defined NNS-Mn Complex Catalyzed Selective Synthesis of C-3 Alkylated Indoles and Bisindolylmethanes Using Alcohols. J Org Chem 2022; 87:3989-4000. [PMID: 35258302 DOI: 10.1021/acs.joc.1c02702] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we demonstrated Mn-catalyzed selective C-3 functionalization of indoles with alcohols. The developed catalyst can also furnish bis(indolyl)methanes from the same set of substrates under slightly modified reaction conditions. Mechanistic studies reveal that the C-3 functionalization of indoles is going via a borrowing hydrogen pathway. To highlight the practical utility, a diverse range of substrates including nine structurally important drug molecules are synthesized. Furthermore, we also introduced a one-pot cascade strategy for synthesizing C-3 functionalized indoles directly from 2-aminophenyl ethanol and alcohol.
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Affiliation(s)
- Avijit Mondal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India
| | - Rahul Sharma
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India
| | - Bishal Dutta
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India
| | - Debjyoti Pal
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India
| | - Dipankar Srimani
- Department of Chemistry, Indian Institute of Technology-Guwahati, Kamrup, Assam 781039, India
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11
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Hao Y, Zhou P, Niu K, Song H, Liu Y, Zhang J, Wang Q. Synthesis of Indole‐ and Pyrrole‐Fused Seven‐Membered Nitrogen Heterocycles via Acid‐Base Switchable Cyclization Involving Cleavage of Amide C−N Bonds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yanke Hao
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Pan Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Kaikai Niu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
| | - Jingjing Zhang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
- College of Basic Science Tianjin Agricultural University Tianjin 300384 People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Frontiers Science Center for New Organic Matter, College of Chemistry Nankai University Tianjin 300071, People's Republic of China
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12
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Borghs JC, Zubar V, Azofra LM, Sklyaruk J, Rueping M. Manganese-Catalyzed Regioselective Dehydrogenative C- versus N-Alkylation Enabled by a Solvent Switch: Experiment and Computation. Org Lett 2020; 22:4222-4227. [DOI: 10.1021/acs.orglett.0c01270] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Jannik C. Borghs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Viktoriia Zubar
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
- KAUST Catalysis Center (KCC), KAUST, Thuwal 23955-6900, Saudi Arabia
| | - Luis Miguel Azofra
- CIDIA-FEAM (Unidad Asociada al Consejo Superior de Investigaciones Científicas, CSIC, avalada por el Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla), Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), Universidad de Las Palmas de Gran Canaria (ULPGC), Campus de Tafira, 35017 Las Palmas de Gran Canaria, Spain
| | - Jan Sklyaruk
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
- KAUST Catalysis Center (KCC), KAUST, Thuwal 23955-6900, Saudi Arabia
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13
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Wang ZS, Chen YB, Zhang HW, Sun Z, Zhu C, Ye LW. Ynamide Smiles Rearrangement Triggered by Visible-Light-Mediated Regioselective Ketyl-Ynamide Coupling: Rapid Access to Functionalized Indoles and Isoquinolines. J Am Chem Soc 2020; 142:3636-3644. [PMID: 32003986 DOI: 10.1021/jacs.9b13975] [Citation(s) in RCA: 115] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In the past decades, significant advances have been made on radical Smiles rearrangement. However, the eventually formed radical intermediates in these reactions are limited to the amidyl radical, except for the few examples initiated by a N-centered radical. Here, a novel and practical radical Smiles rearrangement triggered by photoredox-catalyzed regioselective ketyl-ynamide coupling is reported, which represents the first radical Smiles rearrangement of ynamides. This method enables facile access to a variety of valuable 2-benzhydrylindoles with broad substrate scope in generally good yields under mild reaction conditions. In addition, this chemistry can also be extended to the divergent synthesis of versatile 3-benzhydrylisoquinolines through a similar ketyl-ynamide coupling and radical Smiles rearrangement, followed by dehydrogenative oxidation. Moreover, such an ynamide Smiles rearrangement initiated by intermolecular photoredox catalysis via addition of external radical sources is also achieved. By control experiments, the reaction was shown to proceed via key ketyl radical and α-imino carbon radical intermediates.
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Affiliation(s)
- Ze-Shu Wang
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Yang-Bo Chen
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Hao-Wen Zhang
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Zhou Sun
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Chunyin Zhu
- School of Chemistry and Chemical Engineering , Jiangsu University , Zhenjiang 212013 , China
| | - Long-Wu Ye
- iChEM, State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China.,State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , Shanghai 200032 , China
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14
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Ortiz R, Koukouras A, Marqués-López E, Herrera RP. Functionalization of π-activated alcohols by trapping carbocations in pure water under smooth conditions. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.01.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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15
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Bhattacharjee P, Bora U. Molecular Iodine-Catalyzed Selective C-3 Benzylation of Indoles with Benzylic Alcohols: A Greener Approach toward Benzylated Indoles. ACS OMEGA 2019; 4:11770-11776. [PMID: 31460284 PMCID: PMC6682061 DOI: 10.1021/acsomega.9b01481] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 05/29/2019] [Indexed: 05/23/2023]
Abstract
Iodine-catalyzed selective C-3 benzylation of indoles with benzylic alcohols is developed. The reaction proceeds with molecular iodine as the catalyst under ligand-, metal-, and base-free conditions and tolerates wide functionalities. The experimental observations account for the halogen-bond activation mechanistic pathway for the molecular iodine catalysis.
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16
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Aegurla B, Peddinti RK. Dehydrative C‐ and S‐Alkylation: Access to Highly Substituted 1‐Sulfonylpropanes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Balakrishna Aegurla
- Department of ChemistryIndian Institute of Technology Roorkee Roorkee- 247 667, Uttarakhand India
| | - Rama Krishna Peddinti
- Department of ChemistryIndian Institute of Technology Roorkee Roorkee- 247 667, Uttarakhand India
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17
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Hikawa H, Kotaki F, Kikkawa S, Azumaya I. Gold(III)-Catalyzed Decarboxylative C3-Benzylation of Indole-3-carboxylic Acids with Benzylic Alcohols in Water. J Org Chem 2019; 84:1972-1979. [PMID: 30672696 DOI: 10.1021/acs.joc.8b02947] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A strategy for the gold(III)-catalyzed decarboxylative coupling reaction of indole-3-carboxylic acids with benzylic alcohols has been developed. This cascade reaction is devised as a straightforward and efficient synthetic route for 3-benzylindoles in moderate to excellent yields (50-93%). A Hammett study of the protodecarboxylation gives a negative ρ value, suggesting that there is a buildup of positive charge on the indole ring in the transition state. Furthermore, comparison of initial rates in H2O and in D2O reveals an observed kinetic solvent isotope effect (KSIE = 2.7). This simple protocol, which affords the desired products with CO2 and water as the coproducts, can be achieved under mild conditions without the need for base or other additives in water.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences , Toho University , 2-2-1, Miyama , Funabashi , Chiba 274-8510 , Japan
| | - Fumiya Kotaki
- Faculty of Pharmaceutical Sciences , Toho University , 2-2-1, Miyama , Funabashi , Chiba 274-8510 , Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences , Toho University , 2-2-1, Miyama , Funabashi , Chiba 274-8510 , Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences , Toho University , 2-2-1, Miyama , Funabashi , Chiba 274-8510 , Japan
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18
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Hikawa H, Matsuura Y, Kikkawa S, Azumaya I. Platinum( ii)-catalyzed dehydrative C3-benzylation of electron-deficient indoles with benzyl alcohols. Org Chem Front 2019. [DOI: 10.1039/c9qo00831d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synthetic strategy for the water-promoted direct dehydrative coupling of indoles with benzyl alcohols catalyzed by PtCl2(PhCN)2 in 1,2-dichloroethane has been developed.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Chiba 274-8510
- Japan
| | - Yuuki Matsuura
- Faculty of Pharmaceutical Sciences
- Toho University
- Chiba 274-8510
- Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Chiba 274-8510
- Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences
- Toho University
- Chiba 274-8510
- Japan
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19
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Nosova EV, Lipunova GN, Charushin VN, Chupakhin ON. Fluorine-containing indoles: Synthesis and biological activity. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.05.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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20
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Jadhav AS, Pankhade YA, Vijaya Anand R. Exploring Gold Catalysis in a 1,6-Conjugate Addition/Domino Electrophilic Cyclization Cascade: Synthesis of Cyclohepta[b]indoles. J Org Chem 2018; 83:8615-8626. [DOI: 10.1021/acs.joc.8b00607] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Abhijeet S. Jadhav
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City,
Sector 81, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Yogesh A. Pankhade
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City,
Sector 81, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City,
Sector 81, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
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21
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Affiliation(s)
- Valentina Pirovano
- Department of Pharmaceutical Sciences; General and Organic Chemistry Section “A. Marchesini”; University of Milan; Via G. Venezian 21 20133 Milan Italy
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22
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Kitanosono T, Masuda K, Xu P, Kobayashi S. Catalytic Organic Reactions in Water toward Sustainable Society. Chem Rev 2017; 118:679-746. [PMID: 29218984 DOI: 10.1021/acs.chemrev.7b00417] [Citation(s) in RCA: 382] [Impact Index Per Article: 54.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Traditional organic synthesis relies heavily on organic solvents for a multitude of tasks, including dissolving the components and facilitating chemical reactions, because many reagents and reactive species are incompatible or immiscible with water. Given that they are used in vast quantities as compared to reactants, solvents have been the focus of environmental concerns. Along with reducing the environmental impact of organic synthesis, the use of water as a reaction medium also benefits chemical processes by simplifying operations, allowing mild reaction conditions, and sometimes delivering unforeseen reactivities and selectivities. After the "watershed" in organic synthesis revealed the importance of water, the development of water-compatible catalysts has flourished, triggering a quantum leap in water-centered organic synthesis. Given that organic compounds are typically practically insoluble in water, simple extractive workup can readily separate a water-soluble homogeneous catalyst as an aqueous solution from a product that is soluble in organic solvents. In contrast, the use of heterogeneous catalysts facilitates catalyst recycling by allowing simple centrifugation and filtration methods to be used. This Review addresses advances over the past decade in catalytic reactions using water as a reaction medium.
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Affiliation(s)
- Taku Kitanosono
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Koichiro Masuda
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Pengyu Xu
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo , Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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23
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Ortiz R, Herrera RP. Direct Substitution of Alcohols in Pure Water by Brønsted Acid Catalysis. Molecules 2017; 22:molecules22040574. [PMID: 28368309 PMCID: PMC6154297 DOI: 10.3390/molecules22040574] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 03/29/2017] [Accepted: 03/30/2017] [Indexed: 11/16/2022] Open
Abstract
With the increasing concern for sustainability, the use of environmentally friendly media to perform chemical processes has attracted the attention of many research groups. Among them, the use of water, as the unique solvent for reactions, is currently an active area of research. One process of particular interest is the direct nucleophilic substitution of an alcohol avoiding its preliminary transformation into a good leaving group, since one of the by-products in this approach would be water. The direct substitution of allylic, benzylic, and tertiary alcohols has been achieved through SN1-type reactions with catalytic amounts of Brønsted or Lewis acids; however, organic solvents are often required. In this review, the pioneering SN1 approaches performed in pure water and in the absence of a metal based Lewis acid are compiled and discussed.
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Affiliation(s)
- Rosa Ortiz
- Laboratorio de Organocatálisis Asimétrica, Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, Zaragoza 50009, Spain.
| | - Raquel P Herrera
- Laboratorio de Organocatálisis Asimétrica, Departamento de Química Orgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza, C/Pedro Cerbuna 12, Zaragoza 50009, Spain.
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24
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Jiang X, Tang W, Xue D, Xiao J, Wang C. Divergent Dehydrogenative Coupling of Indolines with Alcohols. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03667] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xue Jiang
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119, China
| | - Weijun Tang
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119, China
| | - Dong Xue
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119, China
| | - Jianliang Xiao
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119, China
- Department
of Chemistry, University of Liverpool, Liverpool, L69 7ZD, United Kingdom
| | - Chao Wang
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education,
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710119, China
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25
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Xu YL, Teng QH, Tong W, Wang HS, Pan YM, Ma XL. Atom-Economic Synthesis of 4-Pyrones from Diynones and Water. Molecules 2017; 22:E109. [PMID: 28075414 PMCID: PMC6155647 DOI: 10.3390/molecules22010109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 12/31/2022] Open
Abstract
Transition-metal-free synthesis of 4-pyrones via TfOH-promoted nucleophilic addition/cyclization of diynones and water has been developed. This transformation is simple, atom economical and environmentally benign, providing rapid and efficient access to substituted 4-pyrones.
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Affiliation(s)
- Yan-Li Xu
- College of Pharmacy, Guilin Medical University, Guilin 541004, China.
| | - Qing-Hu Teng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Wei Tong
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Heng-Shan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Ying-Ming Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University, Guilin 541004, China.
| | - Xian-Li Ma
- College of Pharmacy, Guilin Medical University, Guilin 541004, China.
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26
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Hikawa H, Ijichi Y, Kikkawa S, Azumaya I. Cobalt(II)/TPPMS-Catalyzed Dehydrative Nucleophilic Substitution of Alcohols in Water. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Yukiko Ijichi
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama 274-8510 Funabashi, Chiba Japan
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27
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Hydroxyl Functionalized Lewis Acidic Ionic Liquid on Silica: An Efficient Catalyst for the C-3 Friedel-Crafts Benzylation of Indoles with Benzyl Alcohols. Catal Letters 2016. [DOI: 10.1007/s10562-016-1918-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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28
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Obata T, Suzuki S, Nakagawa A, Kajihara R, Noguchi K, Saito A. Gold-Catalyzed Domino Synthesis of Functionalized Benzofurans and Tetracyclic Isochromans via Formal Carboalkoxylation. Org Lett 2016; 18:4136-9. [DOI: 10.1021/acs.orglett.6b02159] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tomoyuki Obata
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Sho Suzuki
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Asuka Nakagawa
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Ryota Kajihara
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Keiichi Noguchi
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Akio Saito
- Division of Applied Chemistry,
Institute of Engineering and ‡Instrumentation
Analysis Center, Tokyo University of Agriculture and Technology, 2-24-16
Naka-cho, Koganei, Tokyo 184-8588, Japan
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29
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Goswami P, Anand RV. Bi(OTf)3Catalyzed Solvent Free Approach to Unsymmetrical Diaryl(2-indolyl)methanes through 1,6-Conjugate Addition of 3-Substituted Indoles topara-Quinone Methides. ChemistrySelect 2016. [DOI: 10.1002/slct.201600553] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Prithwish Goswami
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector 81, Knowledge City, S. A. S. Nagar, manauli (PO) Punjab - 140306 India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali; Sector 81, Knowledge City, S. A. S. Nagar, manauli (PO) Punjab - 140306 India
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30
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Rao HSP, Rao AVB. Copper-mediated arylation with arylboronic acids: Facile and modular synthesis of triarylmethanes. Beilstein J Org Chem 2016; 12:496-504. [PMID: 27340442 PMCID: PMC4902010 DOI: 10.3762/bjoc.12.49] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Accepted: 03/04/2016] [Indexed: 12/12/2022] Open
Abstract
A facile and modular synthesis of triarylmethanes was achieved in good yield via a two-step sequence in which the final step is the copper(II)-catalyzed arylation of diarylmethanols with arylboronic acids. By using this protocol a variety of symmetrical and unsymmetrical triarylmethanes were synthesized. As an application of the newly developed methodology, we demonstrate a high-yielding synthesis of the triarylmethane intermediate towards an anti-breast-cancer drug candidate.
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Affiliation(s)
- H Surya Prakash Rao
- Department of Chemistry, Pondicherry University, Pondicherry 605 014, India Telephone: +914132654411
| | - A Veera Bhadra Rao
- Department of Chemistry, Pondicherry University, Pondicherry 605 014, India Telephone: +914132654411
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31
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Yu H, Liao P. DBSA-catalyzed Friedel–Crafts alkylation of cyclic ketene dithioacetals with alcohols in water. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.062] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Hikawa H, Mori Y, Kikkawa S, Azumaya I. A Radical Pathway for Direct Substitution of Benzyl Alcohols with Water-Soluble Copper Catalyst in Water. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500835] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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33
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Hikawa H, Tada A, Kikkawa S, Azumaya I. Direct Use of Benzylic Alcohols for Gold(III)-Catalyzed S
-Benzylation of Mercaptobenzoic Acids in Water. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500839] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Hikawa H, Machino Y, Toyomoto M, Kikkawa S, Azumaya I. Cationic palladium(ii)-catalyzed dehydrative nucleophilic substitutions of benzhydryl alcohols with electron-deficient benzenethiols in water. Org Biomol Chem 2016; 14:7038-45. [DOI: 10.1039/c6ob01140c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An efficient direct nucleophilic substitution of benzhydryl alcohols with electron-deficient benzenethiols using cationic Pd(ii) catalysts as Lewis acids in water is reported.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Yumo Machino
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Mariko Toyomoto
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
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35
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Liang D, Li X, Li Y, Yang Y, Gao S, Cheng P. Br2-Catalyzed regioselective dehydrative coupling of indoles with acyloins: direct synthesis of α-(3-indolyl) ketones. RSC Adv 2016. [DOI: 10.1039/c6ra03321k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
An efficient Br2-catalyzed synthesis of α-(3-indolyl) ketones via dehydrative coupling of simple indoles with acyloins is presented.
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Affiliation(s)
- Deqiang Liang
- Department of Chemistry
- Kunming University
- Kunming 650214
- China
| | - Xiangguang Li
- Department of Chemistry
- Kunming University
- Kunming 650214
- China
| | - Yanni Li
- Department of Chemistry
- Kunming University
- Kunming 650214
- China
| | - Yungang Yang
- Department of Chemistry
- Kunming University
- Kunming 650214
- China
| | - Shulin Gao
- Department of Chemistry
- Kunming University
- Kunming 650214
- China
| | - Ping Cheng
- School of Environmental and Chemical Engineering
- Shanghai University
- Shanghai 200444
- China
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36
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Suárez A, Gohain M, Fernández-Rodríguez MA, Sanz R. Synthesis of Fused Polycyclic Indoles by Brønsted Acid-Catalyzed Intramolecular Alkylation of Indoles with Alcohols. J Org Chem 2015; 80:10421-30. [DOI: 10.1021/acs.joc.5b02048] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Anisley Suárez
- Departamento de Química,
Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Mukut Gohain
- Departamento de Química,
Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Manuel A. Fernández-Rodríguez
- Departamento de Química,
Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
| | - Roberto Sanz
- Departamento de Química,
Área de Química Orgánica, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain
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37
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38
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Morita N, Yasuda A, Shibata M, Ban S, Hashimoto Y, Okamoto I, Tamura O. Gold(I)/(III)-Catalyzed Synthesis of Cyclic Ethers; Valency-Controlled Cyclization Modes. Org Lett 2015; 17:2668-71. [PMID: 25996633 DOI: 10.1021/acs.orglett.5b01046] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Strategic use of oxophilic (hard) gold(III) and π-philic (soft) gold(I) catalysts provides access to two types of cyclic ethers from propargylic alcohols. Thus, heating propargylic alcohols with an oxophilic gold(III) catalyst (AuBr3) results in cyclization to afford cyclic ethers bearing an acetylenic moiety, due to coordination of gold(III) to the oxygen of the propargylic hydroxyl group. On the other hand, propargylic alcohols with a π-philic gold(I) catalyst (Ph3PAuNTf2) induces Meyer-Schuster rearrangement to afford α,β-unsaturated ketones, which undergo gold(III)-catalyzed intramolecular oxa-Michael addition to afford cyclic ethers bearing a carbonyl group, due to coordination of gold(III) to the oxygen of the carbonyl group.
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Affiliation(s)
- Nobuyoshi Morita
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Arisa Yasuda
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Motohiro Shibata
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Shintaro Ban
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | | | - Iwao Okamoto
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Osamu Tamura
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
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39
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Zhang FZ, Tian Y, Li GX, Qu J. Intramolecular etherification and polyene cyclization of π-activated alcohols promoted by hot water. J Org Chem 2015; 80:1107-15. [PMID: 25525716 DOI: 10.1021/jo502636d] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Hot water, acting as a mildly acidic catalyst, efficiently promoted intramolecular direct nucleophilic substitution reactions of unsaturated alcohols with heteroatom or carbon nucleophiles. In a mixed solvent of water and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), polyene cyclizations using allylic alcohols as initiators gave the desired cyclized products, and in neat HFIP, a tricyclization reaction gave a tetracyclic product in 51% chemical yield.
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40
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Hikawa H, Izumi K, Ino Y, Kikkawa S, Yokoyama Y, Azumaya I. Palladium-Catalyzed Benzylic CH BenzylationviaBis-Benzylpalladium(II) Complexes in Water: An Effective Pathway for the Direct Construction ofN-(1,2-Diphenylethyl)anilines. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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41
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Kona CN, Shinde MH, Ramana CV. Gold(i)-catalyzed hydroindolylation of allenyl ethers. Org Biomol Chem 2015; 13:5358-62. [DOI: 10.1039/c5ob00635j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleophilicity game: the gold(i)-catalyzed reaction/rearrangement of allenyl ethers has been investigated in the presence of indoles. The reaction outcome seems to be decided mainly by the nature of the pendant group of allenyl ether. Control experiments are indicative of an inner sphere mechanism for the hydroindolylation reaction.
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Affiliation(s)
| | - Mahesh H. Shinde
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Chepuri V. Ramana
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
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42
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Paioti PHS, Aponick A. Gold-Catalyzed Transformation of Unsaturated Alcohols. Top Curr Chem (Cham) 2014; 357:63-94. [DOI: 10.1007/128_2014_590] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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43
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Li L, Shu C, Zhou B, Yu YF, Xiao XY, Ye LW. Generation of gold carbenes in water: efficient intermolecular trapping of the α-oxo gold carbenoids by indoles and anilines. Chem Sci 2014. [DOI: 10.1039/c4sc00983e] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The efficient intermolecular reaction of gold carbene intermediates, generated via gold-catalyzed alkyne oxidation, with indoles and anilines has been realized in aqueous media.
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Affiliation(s)
- Long Li
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Chao Shu
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Bo Zhou
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Yong-Fei Yu
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Xin-Yu Xiao
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
| | - Long-Wu Ye
- State Key Laboratory for Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005, P. R. China
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44
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Gómez AB, Holmberg P, Bäckvall JE, Martín-Matute B. Transition metal-catalyzed redox isomerization of codeine and morphine in water. RSC Adv 2014. [DOI: 10.1039/c4ra07735k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A water-soluble rhodium complex formed from commercially available [Rh(COD)(CH3CN)2]BF4 and 1,3,5-triaza-7-phosphaadamantane (PTA) catalyzes the isomerization of both codeine and morphine into hydrocodone and hydromorphone in water with very high efficiency.
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Affiliation(s)
- Antonio Bermejo Gómez
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- Stockholm, Sweden
- Berzelii Center EXSELENT
| | | | - Jan-E. Bäckvall
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- Stockholm, Sweden
- Berzelii Center EXSELENT
| | - Belén Martín-Matute
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- Stockholm, Sweden
- Berzelii Center EXSELENT
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