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Microwave Assisted Esterification of Aryl/Alkyl Acids Catalyzed by N-Fluorobenzenesulfonimide. Catalysts 2022. [DOI: 10.3390/catal12111413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The susceptibility of the carbonyl group towards nucleophilic attack affords the construction of various organic compounds. Thus, investigations of carbonyl activation applying greener methodologies are highly important. In the present work, among the investigated N-halo compounds, N-fluorobenzenesulfonimide (NFSi) has been found as an efficient and selective catalyst in the reaction of direct esterification of aryl and alkyl carboxylic acids supported by microwave (MW) irradiation. The comprehensive esterification of different benzoic acids and mono-, di- and tri-carboxy alkyl derivatives was performed, whereby significant reaction time reductions were achieved. The presented method used NFSi as an easily manipulatable, non-metal, water- and air-tolerant catalyst, allowing simple synthetic and isolation procedures and energy saving, compared to conventional methodologies. Importantly, in contrast to esterification under thermal conditions, where N-halo compounds behave as pre-catalysts, in the MW-supported protocol, a distinct reaction mechanism has been proposed that assumes NFSi as a sustainable catalyst. Moreover, a scale-up of the industrially important derivative was performed.
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2
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Pillaiyar T, Sedaghati M, B. Mahardhika A, L. Wendt L, E. Müller C. Iodine-catalyzed electrophilic substitution of indoles: Synthesis of (un)symmetrical diindolylmethanes with a quaternary carbon center. Beilstein J Org Chem 2021; 17:1464-1475. [PMID: 34221175 PMCID: PMC8218542 DOI: 10.3762/bjoc.17.102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/08/2021] [Indexed: 12/16/2022] Open
Abstract
A novel, versatile approach for the synthesis of unsymmetrical 3,3'-diindolylmethanes (DIMs) with a quaternary carbon center has been developed via iodine-catalyzed coupling of trifluoromethyl(indolyl)phenylmethanols with indoles. In contrast to previously reported methods, the new procedure is characterized by chemoselectivity, mild conditions, high yields, and scalability to obtain gram amounts for biological studies. Selected compounds were found to display affinity for cannabinoid receptors, which are promising drug targets for the treatment of inflammatory and neurodegenerative diseases.
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Affiliation(s)
- Thanigaimalai Pillaiyar
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany, phone: +49-228-73-2301; Fax: +49-228-73-2567
- Pharmaceutical Institute, Pharmaceutical/Medicinal Chemistry, University of Tuebingen, Auf der Morgenstelle 8, 72076 Tuebingen, Germany, phone: +49-7071-29-77458
| | - Masoud Sedaghati
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany, phone: +49-228-73-2301; Fax: +49-228-73-2567
| | - Andhika B. Mahardhika
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany, phone: +49-228-73-2301; Fax: +49-228-73-2567
- Research Training Group 1873, University of Bonn, 53127 Bonn, Germany
| | - Lukas L. Wendt
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany, phone: +49-228-73-2301; Fax: +49-228-73-2567
| | - Christa E. Müller
- PharmaCenter Bonn, Pharmaceutical Institute, Pharmaceutical & Medicinal Chemistry, University of Bonn, An der Immenburg 4, D-53121 Bonn, Germany, phone: +49-228-73-2301; Fax: +49-228-73-2567
- Research Training Group 1873, University of Bonn, 53127 Bonn, Germany
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3
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Abe T, Hirao S. Rapid access to indole-fused bicyclo[2.2.2]octanones by merging the umpolung strategy and molecular iodine as a green catalyst. Org Biomol Chem 2021; 18:4193-4197. [PMID: 32458925 DOI: 10.1039/d0ob01038c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-pot synthesis of indole-fused bicyclo[2.2.2]octanones from DiMeOIN and 2-cyclohexen-1-one is accomplished under an iodine catalyst. The simple and metal-free conditions provide a practical tool to construct Csp3-rich complex molecules via coupling cyclization.
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Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan.
| | - Seiya Hirao
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan.
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Jadhav PM, Rode AB, Kótai L, Pawar RP, Tekale SU. Revisiting applications of molecular iodine in organic synthesis. NEW J CHEM 2021. [DOI: 10.1039/d1nj02560k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Molecular iodine contributes significantly to organic transformations in synthetic organic chemistry. It works effectively due to its mild Lewis acidic character, ability as an oxidizing agent, good moisture stability, and easy availability.
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Affiliation(s)
- Popat M. Jadhav
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
| | - Ambadas B. Rode
- Regional Centre for Biotechnology, Faridabad-121 001, Haryana (NCR Delhi), India
| | - László Kótai
- Research Centre for Natural Sciences, ELKH, H-1117, Budapest, Hungary
| | - Rajendra P. Pawar
- Department of Chemistry, Shiv Chhatrapati College, Aurangabad 431005, Maharashtra, India
| | - Sunil U. Tekale
- Department of Chemistry, Deogiri College, Aurangabad 431 005, Maharashtra, India
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5
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Gandamana DA, Gagosz F, Chiba S. Diastereoselective hydroalkylation of aryl alkenes enabled by Remote hydride transfer. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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N-Iodosuccinimide as a Precatalyst for Direct Cross-Coupling of Alcohols with C-Nucleophiles under Solvent-Free Reaction Conditions. Catalysts 2020. [DOI: 10.3390/catal10080850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
C–C bond formation is one of the most important implements in synthetic organic chemistry. In pursuit of effective synthetic routes functioning under greener pathways to achieve direct C–C bond formation, we report N-iodosuccinimide (NIS) as the most effective precatalyst among the N-halosuccinimides (NXSs) for the direct cross-coupling of benzyl alcohols with C-nucleophiles under solvent-free reaction conditions (SFRC). The protocol is metal-free, and air- and water-tolerant, providing a large-scale synthesis with almost quantitative yields.
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7
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He. Y, Tang Z, Hong G, Hu C, Zhou C, Wang L. Scandium(III) Trifluoromethanesulfonate Catalyzed Reactions of 9‐Aryl‐9‐fluorenols with 1,1‐Diarylethylenes. ChemistrySelect 2020. [DOI: 10.1002/slct.202000814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Yuchen He.
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
| | - Zhicong Tang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
| | - Gang Hong
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
| | - Chen Hu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
| | - Chen Zhou
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
| | - Limin Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals East China University of Science and Technology 130 Meilong Road Shanghai 200237 P. R. China
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8
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Courant T, Lombard M, Boyarskaya DV, Neuville L, Masson G. Tritylium assisted iodine catalysis for the synthesis of unsymmetrical triarylmethanes. Org Biomol Chem 2020; 18:6502-6508. [PMID: 32789393 DOI: 10.1039/d0ob01502d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The combined Lewis acid catalytic system, generated from molecular iodine and tritylium tetrafluoroborate effectively catalyzed the Friedel-Crafts (FC) arylation of diarylmethyl sulfides providing an efficient access to various unsymmetrical triarylmethanes. The addition of tritylium and iodine created a more active catalytic system to promote the cleavage of sulfidic C-S bonds.
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Affiliation(s)
- Thibaut Courant
- Institut de Chimie des Substances Naturelles CNRS, Univ. Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
| | - Marine Lombard
- Institut de Chimie des Substances Naturelles CNRS, Univ. Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
| | - Dina V Boyarskaya
- Institut de Chimie des Substances Naturelles CNRS, Univ. Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
| | - Luc Neuville
- Institut de Chimie des Substances Naturelles CNRS, Univ. Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles CNRS, Univ. Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France.
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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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Čebular K, Božić BĐ, Stavber S. 1,3-Dibromo-5,5-dimethylhydantoin as a Precatalyst for Activation of Carbonyl Functionality. Molecules 2019; 24:molecules24142608. [PMID: 31319626 PMCID: PMC6681419 DOI: 10.3390/molecules24142608] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/10/2019] [Accepted: 07/15/2019] [Indexed: 11/16/2022] Open
Abstract
Activation of carbonyl moiety is one of the most rudimentary approaches in organic synthesis and is crucial for a plethora of industrial-scale condensation reactions. In esterification and aldol condensation, which represent two of the most important reactions, the susceptibility of the carbonyl group to nucleophile attack allows the construction of a variety of useful organic compounds. In this context, there is a constant need for development of and improvement in the methods for addition-elimination reactions via activation of carbonyl functionality. In this paper, an advanced methodology for the direct esterification of carboxylic acids and alcohols, and for aldol condensation of aldehydes using widely available, inexpensive, and metal-free 1,3-dibromo-5,5-dimethylhydantoin under neat reaction conditions is reported. The method is air- and moisture-tolerant, allowing simple synthetic and isolation procedures for both reactions presented in this paper. The reaction pathway for esterification is proposed and a scale-up of certain industrially important derivatives is performed.
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Affiliation(s)
- Klara Čebular
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia
| | - Bojan Đ Božić
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
- Institute of Physiology and Biochemistry, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia
| | - Stojan Stavber
- Department of Physical and Organic Chemistry, Jožef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
- Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia.
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Bai J, Yasumoto K, Kano T, Maruoka K. Asymmetric Synthesis of Chiral 1,4‐Enynes through Organocatalytic Alkenylation of Propargyl Alcohols with Trialkenylboroxines. Angew Chem Int Ed Engl 2019; 58:8898-8901. [DOI: 10.1002/anie.201904520] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Jian‐Fei Bai
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
- Current address: Suzhou Research Institute of LICPLanzhou Institute of Chemical Physics (LICP)Chinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Kento Yasumoto
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
| | - Taichi Kano
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 P. R. China
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12
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Bai J, Yasumoto K, Kano T, Maruoka K. Asymmetric Synthesis of Chiral 1,4‐Enynes through Organocatalytic Alkenylation of Propargyl Alcohols with Trialkenylboroxines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jian‐Fei Bai
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
- Current address: Suzhou Research Institute of LICPLanzhou Institute of Chemical Physics (LICP)Chinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Kento Yasumoto
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
| | - Taichi Kano
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
| | - Keiji Maruoka
- Department of ChemistryGraduate School of ScienceKyoto University, Sakyo Kyoto 606-8502 Japan
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 P. R. China
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13
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Yang GP, Jiang N, Huang XQ, Yu B, Hu CW. Non-corrosive heteropolyacid-based recyclable ionic liquid catalyzed direct dehydrative coupling of alcohols with alcohols or alkenes. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.02.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Li X, Hu W, Xiong Q, Ye S, Huang Y, Guo Q. Chiral Anion‐Induced Catalytic Asymmetric Direct Dehydrative Coupling of 3‐Vinylindoles and 3‐Indolylmethanols. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801705] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xiao‐Yun Li
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical EngineeringSouthwest University Chongqing 400715 People's Republic of China
| | - Wei‐Ting Hu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical EngineeringSouthwest University Chongqing 400715 People's Republic of China
| | - Qiu‐Ju Xiong
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical EngineeringSouthwest University Chongqing 400715 People's Republic of China
| | - Si‐Min Ye
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical EngineeringSouthwest University Chongqing 400715 People's Republic of China
| | - Yan‐Min Huang
- College of Chemistry and Life ScienceGuangxi Teachers Education University Nanning 530001 People's Republic of China
| | - Qi‐Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical EngineeringSouthwest University Chongqing 400715 People's Republic of China
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