1
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Applications of Hantzsch Esters in Organocatalytic Enantioselective Synthesis. Catalysts 2023. [DOI: 10.3390/catal13020419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Hantzsch esters (1,4-dihydropyridine dicarboxylates) have become, in this century, very versatile reagents for enantioselective organic transformations. They can act as hydride transfer agents to reduce, regioselectively, a variety of multiple bonds, e.g., C=C and C=N, under mild reaction conditions. They are excellent reagents for the dearomatization of heteroaromatic substances, and participate readily in cascade processes. In the last few years, they have also become useful reagents for photoredox reactions. They can participate as sacrificial electron and hydrogen donors and when 4-alkyl or 4-acyl-substituted, they can act as alkyl or acyl radical transfer agents. These last reactions may take place in the presence or absence of a photocatalyst. This review surveys the literature published in this area in the last five years.
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2
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Schirmer TE, König B. Ion-Pairing Catalysis in Stereoselective, Light-Induced Transformations. J Am Chem Soc 2022; 144:19207-19218. [PMID: 36240496 DOI: 10.1021/jacs.2c04759] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
With the rapid development of photoredox catalysis, numerous concepts for asymmetric induction were successfully and broadly adapted from polar two-electron transformations to radical chemistry. While this applies to organocatalysis or transition metal chemistry, asymmetric ion-pairing catalysis remains a niche application within light-driven reactions today. This perspective gives an overview of recent examples, strategies, and their application in stereoselective transformations at the interface of ion-pairing and photo(redox) catalysis.
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Affiliation(s)
- Tobias E Schirmer
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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3
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Hao MY, Huang MH, Gu XY, Zhang TS, Zhu XT, Hao WJ, Jiang B. Diastereoselective Generation of C 2-Azlactonized 2 H-Chromenes via Brønsted Acid-Catalyzed Oxo-Cyclization of Propargyl Alcohols. J Org Chem 2022; 87:1518-1525. [PMID: 35000383 DOI: 10.1021/acs.joc.1c02299] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A new Brønsted acid-catalyzed oxo-cyclization of propargyl alcohols with azlactones to synthesize C2-azlactonized 2H-chromenes has been established that uses 1,1'-binaphthyl-2,2'-diyl hydrogen phosphate (BiNPO4H) as the catalyst and gives excellent diastereoselectivities (≥19:1 dr) in most cases. This protocol has a high compatibility with various substituents of substrates, offering a catalytic and useful entry to the fabrication of the synthetically important C2-functionalized 2H-chromene scaffold.
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Affiliation(s)
- Meng-Ying Hao
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Min-Hua Huang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Xin-Yu Gu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Tian-Shu Zhang
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, P. R. China
| | - Xiao-Tong Zhu
- Department of Chemistry, Xuzhou Medical University, Xuzhou 221004, People's Republic of China
| | - Wen-Juan Hao
- School of Chemistry and 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 and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
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4
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Hirasawa S, Masuda T, Mukai K, Miyoshi Y, Kanomata N. Asymmetric synthesis of (-)-dehydro- exo-brevicomin with a photoisomerisation-intramolecular acetalisation sequence. Org Biomol Chem 2021; 19:6897-6903. [PMID: 34328158 DOI: 10.1039/d1ob00952d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We herein report a novel, short asymmetric synthesis of (-)-dehydro-exo-brevicomin (DHB, 1), a sex pheromone isolated from house mice, in 44% overall yield, the highest yield reported so far, over eight steps from trans-3-hexen-1-ol (7). We successfully prepared the target molecule (-)-1 from spontaneous intramolecular acetalisation after the photoisomerisation of trans-enone 6, which generated the corresponding cis-enone 5in situ, the possible biosynthetic precursor of DHB.
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Affiliation(s)
- Shun Hirasawa
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Tsuyoshi Masuda
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Ken Mukai
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Yusuke Miyoshi
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
| | - Nobuhiro Kanomata
- Department of Chemistry and Biochemistry, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan.
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5
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Synthesis of a novel acidic ionic liquid catalyst and its application for preparation of pyridines via a cooperative vinylogous anomeric-based oxidation. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-020-04361-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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6
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Kikuchi J, Kodama S, Terada M. Radical addition reaction between chromenols and toluene derivatives initiated by Brønsted acid catalyst under light irradiation. Org Chem Front 2021. [DOI: 10.1039/d1qo00657f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A Brønsted acid-catalyzed radical addition reaction between chromenols and toluene derivatives was accomplished under light irradiation, affording benzylated chromene derivatives through benzylic C(sp3)–H functionalization of toluene derivatives.
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Affiliation(s)
- Jun Kikuchi
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Shota Kodama
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
| | - Masahiro Terada
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Sendai 980-8578
- Japan
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7
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Chang Z, Yao J, Dou X. Rhodium‐Catalysed Asymmetric Synthesis of 4‐Alkyl‐4
H
‐Chromenes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000579] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Zhiqian Chang
- Department of Chemistry, School of ScienceChina Pharmaceutical University Nanjing 211198 People‘s Republic of China
| | - Jian Yao
- Department of Chemistry, School of ScienceChina Pharmaceutical University Nanjing 211198 People‘s Republic of China
| | - Xiaowei Dou
- Department of Chemistry, School of ScienceChina Pharmaceutical University Nanjing 211198 People‘s Republic of China
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8
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Krištofíková D, Modrocká V, Mečiarová M, Šebesta R. Green Asymmetric Organocatalysis. CHEMSUSCHEM 2020; 13:2828-2858. [PMID: 32141177 DOI: 10.1002/cssc.202000137] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Asymmetric organocatalysis is becoming one of the main tools for the synthesis of chiral compounds that are needed as medicines, crop protection agents, and other bioactive molecules. It can be effectively combined with various green chemistry methodologies. Intensification techniques, such as ball milling, flow, high pressure, or light, bring not only higher yields, faster reactions, and easier product isolation, but also new reactivities. More sustainable reaction media, such as ionic liquids, deep eutectic solvents, green solvent alternatives, and water, also considerably enhance the sustainability profile of many organocatalytic reactions.
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Affiliation(s)
- Dominika Krištofíková
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Viktória Modrocká
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Mária Mečiarová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
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9
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Aranda C, Oksdath‐Mansilla G, Bisogno FR, Gonzalo G. Deracemisation Processes Employing Organocatalysis and Enzyme Catalysis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901112] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Carmen Aranda
- Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC Avda/Reina Mercedes 10 41012 Sevilla Spain
| | - Gabriela Oksdath‐Mansilla
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Instituto de Investigaciones en Físico-Química Córdoba (INFIQC-CONICET)Universidad Nacional de Córdoba, Medina Allende y Haya de la Torre, Ciudad Universitaria 5000 Córdoba Argentina
| | - Fabricio R. Bisogno
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Instituto de Investigaciones en Físico-Química Córdoba (INFIQC-CONICET)Universidad Nacional de Córdoba, Medina Allende y Haya de la Torre, Ciudad Universitaria 5000 Córdoba Argentina
| | - Gonzalo Gonzalo
- Departamento de Química OrgánicaUniversidad de Sevilla c/Profesor García González 2 41012 Sevilla Spain
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10
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Yang T, Sun Y, Wang H, Lin Z, Wen J, Zhang X. Iridium‐Catalyzed Enantioselective Hydrogenation of Oxocarbenium Ions: A Case of Ionic Hydrogenation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Tilong Yang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Yongjie Sun
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Heng Wang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Zhenyang Lin
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Academy for Advanced Interdisciplinary StudiesSouthern University of Science and Technology Shenzhen 518055 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
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11
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Yang T, Sun Y, Wang H, Lin Z, Wen J, Zhang X. Iridium‐Catalyzed Enantioselective Hydrogenation of Oxocarbenium Ions: A Case of Ionic Hydrogenation. Angew Chem Int Ed Engl 2020; 59:6108-6114. [DOI: 10.1002/anie.201916677] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Tilong Yang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Yongjie Sun
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Heng Wang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Zhenyang Lin
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Academy for Advanced Interdisciplinary StudiesSouthern University of Science and Technology Shenzhen 518055 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
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12
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Jiang C, Chen Y, Zhang H, Tan JP, Wang T. Catalyst-Free Synthesis of α-Functionalized 2H-Chromenes in Water: A Tandem Self-Promoted pseudo-Substitution and Decarboxylation Process. Chem Asian J 2019; 14:2938-2944. [PMID: 31298487 DOI: 10.1002/asia.201900641] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/01/2019] [Indexed: 11/07/2022]
Abstract
A catalyst-free decarboxylative reaction between β-keto acids and 2H-chromene acetals in water was developed. This reaction featured a broad substrate scope and easily obtainable starting materials to afford α-functionalized 2H-chromenes in high yields. The synthetic value of this protocol was also demonstrated by the scale-up synthesis and versatile conversions of the title product into other useful compounds. In addition, control experiments indicated that water was essential for the reactivity. Mechanistic studies further revealed that the reaction proceeded through a self-promoted tandem pseudo-substitution and decarboxylation process.
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Affiliation(s)
- Chunhui Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China.,Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Yayun Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, P. R. China.,Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Hongkui Zhang
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Jian-Ping Tan
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Tianli Wang
- Key Laboratory of Green Chemistry&Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
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13
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Affiliation(s)
- Qingjing Yang
- School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin, Heilongjiang 150080 China
- Department of ChemistrySouthern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Rui Guo
- Department of ChemistrySouthern University of Science and Technology Shenzhen, Guangdong 518055 China
| | - Jun (Joelle) Wang
- Department of ChemistrySouthern University of Science and Technology Shenzhen, Guangdong 518055 China
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14
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Satbhaiya S, Khonde NS, Rathod J, Gonnade R, Kumar P. Tf2
NH catalyzed 1,6-conjugate addition of 2-hydroxy-p
-quinone methides with β
-Functionalized Ketones: Access to 2,3,4,9-Tetrahydro-1H
-xanthenones and 4H
-Chromene Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900370] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shruti Satbhaiya
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
| | - Nilesh S. Khonde
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
| | - Jayant Rathod
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
| | - Rajesh Gonnade
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
- Physical and Material Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune -411008 India
| | - Pradeep Kumar
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
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15
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Maskeri MA, O'Connor MJ, Jaworski AA, Bay AV, Scheidt KA. A Cooperative Hydrogen Bond Donor–Brønsted Acid System for the Enantioselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811383] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Mark A. Maskeri
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Matthew J. O'Connor
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Ashley A. Jaworski
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Anna V. Bay
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
| | - Karl A. Scheidt
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University Silverman Hall Evanston IL 60208 USA
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16
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Maskeri MA, O'Connor MJ, Jaworski AA, Bay AV, Scheidt KA. A Cooperative Hydrogen Bond Donor-Brønsted Acid System for the Enantioselective Synthesis of Tetrahydropyrans. Angew Chem Int Ed Engl 2018; 57:17225-17229. [PMID: 30380196 DOI: 10.1002/anie.201811383] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 10/26/2018] [Indexed: 11/07/2022]
Abstract
Carbocations stabilized by adjacent oxygen atoms are useful reactive intermediates involved in fundamental chemical transformations. These oxocarbenium ions typically lack sufficient electron density to engage established chiral Brønsted or Lewis acid catalysts, presenting a major challenge to their widespread application in asymmetric catalysis. Leading methods for selectivity operate primarily through electrostatic pairing between the oxocarbenium ion and a chiral counterion. A general approach to new enantioselective transformations of oxocarbenium ions requires novel strategies that address the weak binding capabilities of these intermediates. We demonstrate herein a novel cooperative catalysis system for selective reactions with oxocarbenium ions. This new strategy has been applied to a highly selective and rapid oxa-Pictet-Spengler reaction and highlights a powerful combination of an achiral hydrogen bond donor with a chiral Brønsted acid.
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Affiliation(s)
- Mark A Maskeri
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Matthew J O'Connor
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Ashley A Jaworski
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Anna V Bay
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
| | - Karl A Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, Silverman Hall, Evanston, IL, 60208, USA
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17
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Critical view on the recent enantioselective synthesis of alcohols, amines and related molecules having tertiary benzylic stereocenter. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Jia J, Ho YA, Bülow RF, Rueping M. Brønsted Base Assisted Photoredox Catalysis: Proton Coupled Electron Transfer for Remote C−C Bond Formation via Amidyl Radicals. Chemistry 2018; 24:14054-14058. [DOI: 10.1002/chem.201802907] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Jiaqi Jia
- Institute of Organic Chemistry, RWTH Aachen Landoltweg 1 52074 Aachen Germany
| | - Yee Ann Ho
- Institute of Organic Chemistry, RWTH Aachen Landoltweg 1 52074 Aachen Germany
| | - Raoul F. Bülow
- Institute of Organic Chemistry, RWTH Aachen Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen Landoltweg 1 52074 Aachen Germany
- King Abdullah University of Science and Technology (KAUST)KAUST Catalysis Center (KCC) Thuwal 23955-6900 Saudi Arabia
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19
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Lee S, Bae HY, List B. Can a Ketone Be More Reactive than an Aldehyde? Catalytic Asymmetric Synthesis of Substituted Tetrahydrofurans. Angew Chem Int Ed Engl 2018; 57:12162-12166. [PMID: 30126072 DOI: 10.1002/anie.201806312] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/06/2022]
Abstract
O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an alkynyl substituent, are obtained. Moreover, 2,2,5-trisubstituted and 2,2,5,5-tetrasubstituted tetrahydrofurans are synthesized with excellent stereoselectivities. Additionally, the synthetic utility of the described method is demonstrated with a three-step synthesis of the side chain of anhydroharringtonine.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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20
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Lee S, Bae HY, List B. Kann ein Keton reaktiver als ein Aldehyd sein? Katalytische asymmetrische Synthese von substituierten Tetrahydrofuranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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21
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Thirupathi N, Tung CH, Xu Z. Scandium (III)-Catalyzed Cycloaddition of in situ
Generated ortho
-Quinone Methides with Vinyl Azides: An Efficient Access to Substituted 4H
-Chromenes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800565] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Nuligonda Thirupathi
- Key Lab for Colloid and Interface Chemistry of Education Ministry, Department of Chemistry; Shandong University; No. 27 South Shanda Road Jinan 250100 People's Republic of China
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Chemistry of Education Ministry, Department of Chemistry; Shandong University; No. 27 South Shanda Road Jinan 250100 People's Republic of China
| | - Zhenghu Xu
- Key Lab for Colloid and Interface Chemistry of Education Ministry, Department of Chemistry; Shandong University; No. 27 South Shanda Road Jinan 250100 People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; Shanghai 200032 People's Republic of China
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22
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Kim JH, Kim DY. Synthesis of 2,4-Diaryl-4 H-Chromenes via Decarboxylative Alkylation of β-Keto Acids to ortho-Quinone Methides as Reactive Intermediates. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11534] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Joo Hee Kim
- Department of Chemistry; Soonchunhyang University; Chungnam 31538 South Korea
| | - Dae Young Kim
- Department of Chemistry; Soonchunhyang University; Chungnam 31538 South Korea
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23
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Zhang D, Hu W. Formal Carbene Insertion into C−O or C−N Bond: An Efficient Strategy for the Synthesis of 2-Substituted 2H
-Chromene Derivatives from Chromene Acetals or Hemiaminal Ethers. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800179] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dan Zhang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Wenhao Hu
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
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24
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Lu R, Li Y, Zhao J, Li J, Wang S, Liu L. Redox deracemization of 1,3,4,9-tetrahydropyrano[3,4-b]indoles. Chem Commun (Camb) 2018; 54:4445-4448. [PMID: 29652060 DOI: 10.1039/c8cc01276h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The existing asymmetric synthesis of enantiopure α-substituted cyclic ethers predominantly relies on the enantioselective C-C bond formation involving a prochiral oxocarbenium ion intermediate. In such a strategy, enantioselectivity and efficiency are typically susceptible to the electronic and substituent effects of either nucleophile or electrophile partners. Here, we describe a strategically different redox deracemization of α-substituted 1,3,4,9-tetrahydropyrano[3,4-b]indoles. This method exhibits good compatibility with the regional variation of the electronic or substituent effect of substrates, thus providing a practical and efficient supplement to the traditional strategy.
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Affiliation(s)
- Ran Lu
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
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25
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Jeong HJ, Kim DY. Enantioselective Decarboxylative Alkylation of β-Keto Acids to ortho-Quinone Methides as Reactive Intermediates: Asymmetric Synthesis of 2,4-Diaryl-1-benzopyrans. Org Lett 2018; 20:2944-2947. [DOI: 10.1021/acs.orglett.8b00993] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hyun Jung Jeong
- Department of Chemistry, Soonchunhyang University, Asan, Chungnam 31538, Republic of Korea
| | - Dae Young Kim
- Department of Chemistry, Soonchunhyang University, Asan, Chungnam 31538, Republic of Korea
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26
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Affiliation(s)
- Zhen Guo
- School of Pharmaceutical Sciences & Comprehensive AIDS Research Center, Tsinghua University, Beijing 100084, China
| | - Zhiguo Wang
- School of Pharmaceutical Sciences & Comprehensive AIDS Research Center, Tsinghua University, Beijing 100084, China
| | - Yefeng Tang
- School of Pharmaceutical Sciences & Comprehensive AIDS Research Center, Tsinghua University, Beijing 100084, China
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27
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Li Y, Wan M, Sun S, Fu Z, Huang H, Liu L. Efficient access to chiral benzo[c]chromenes via asymmetric transfer hydrogenation of ketals. Org Chem Front 2018. [DOI: 10.1039/c8qo00096d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A highly enantioselective method to chiral α-substituted 6H-benzo[c]chromenes through chiral imidodiphosphoric acid-catalyzed asymmetric transfer hydrogenation of ketals has been established.
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Affiliation(s)
- Yangshan Li
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P.R. China
| | - Miao Wan
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- P.R. China
| | - Shutao Sun
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- P.R. China
| | - Zhongjun Fu
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P.R. China
| | - Haofei Huang
- School of Chemistry and Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P.R. China
| | - Lei Liu
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
- P.R. China
- School of Chemistry and Chemical Engineering
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28
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Parmar D, Sugiono E, Raja S, Rueping M. Addition and Correction to Complete Field Guide to Asymmetric BINOL-Phosphate Derived Brønsted Acid and Metal Catalysis: History and Classification by Mode of Activation; Brønsted Acidity, Hydrogen Bonding, Ion Pairing, and Metal Phosphates. Chem Rev 2017; 117:10608-10620. [DOI: 10.1021/acs.chemrev.7b00197] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Renzi P, Hioe J, Gschwind RM. Decrypting Transition States by Light: Photoisomerization as a Mechanistic Tool in Brønsted Acid Catalysis. J Am Chem Soc 2017; 139:6752-6760. [PMID: 28472888 PMCID: PMC5456416 DOI: 10.1021/jacs.7b02539] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Indexed: 01/09/2023]
Abstract
Despite the wide applicability of enantioselective Brønsted acid catalysis, experimental insight into transition states is very rare, and most of the mechanistic knowledge is gained by theoretical calculations. Here, we present an alternative approach (decrypting transition state by light = DTS-hν), which enables the decryption of the transition states involved in chiral phosphoric acids catalyzed addition of nucleophiles to imines. Photoisomerization of double bonds is employed as a mechanistic tool. For this class of reactions four pathways (Type I Z, Type I E, Type II Z, Type II E) are possible, leading to different enantiomers depending on the imine configuration (E- or Z-imine) and on the nucleophilic attack site (top or bottom). We demonstrated that the imine double bond can be isomerized by light (365 nm LED) during the reaction leading to a characteristic fingerprint pattern of changes in reaction rate and enantioselectivity. This characteristic fingerprint pattern is directly correlated to the transition states involved in the transformation. Type I Z and Type II Z are demonstrated to be the competing pathways for the asymmetric transfer hydrogenation of ketimines, while in the nucleophilic addition of acetylacetone to N-Boc protected aldimines Type I E and Type II E are active. Accelerations on reaction rate up to 177% were observed for ketimines reduction. Our experimental findings are supported by quantum chemical calculations and noncovalent interaction analysis.
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Affiliation(s)
- Polyssena Renzi
- Institut für Organische
Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Johnny Hioe
- Institut für Organische
Chemie, Universität Regensburg, D-93040 Regensburg, Germany
| | - Ruth M. Gschwind
- Institut für Organische
Chemie, Universität Regensburg, D-93040 Regensburg, Germany
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30
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Wan M, Sun S, Li Y, Liu L. Organocatalytic Redox Deracemization of Cyclic Benzylic Ethers Enabled by An Acetal Pool Strategy. Angew Chem Int Ed Engl 2017; 56:5116-5120. [DOI: 10.1002/anie.201701439] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Indexed: 01/26/2023]
Affiliation(s)
- Miao Wan
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Shutao Sun
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Yangshan Li
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Lei Liu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P.R. China
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31
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Wan M, Sun S, Li Y, Liu L. Organocatalytic Redox Deracemization of Cyclic Benzylic Ethers Enabled by An Acetal Pool Strategy. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701439] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Miao Wan
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Shutao Sun
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Yangshan Li
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
| | - Lei Liu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P.R. China
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P.R. China
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32
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Lee S, Kaib PSJ, List B. Asymmetric Catalysis via Cyclic, Aliphatic Oxocarbenium Ions. J Am Chem Soc 2017; 139:2156-2159. [PMID: 28169541 DOI: 10.1021/jacs.6b11993] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A direct enantioselective synthesis of substituted oxygen heterocycles from lactol acetates and enolsilanes has been realized using a highly reactive and confined imidodiphosphorimidate (IDPi) catalyst. Various chiral oxygen heterocycles, including tetrahydrofurans, tetrahydropyrans, oxepanes, chromans, and dihydrobenzofurans, were obtained in excellent enantioselectivities by reacting the corresponding lactol acetates with diverse enol silanes. Mechanistic studies suggest the reaction to proceed via a nonstabilized, aliphatic, cyclic oxocarbenium ion intermediate paired with the confined chiral counteranion.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Philip S J Kaib
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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33
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Borrmann R, Knop N, Rueping M. Asymmetric Synthesis of Optically Active Spirocyclic Indoline Scaffolds through an Enantioselective Reduction of Indoles. Chemistry 2016; 23:798-801. [DOI: 10.1002/chem.201605450] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 12/15/2022]
Affiliation(s)
- Ruediger Borrmann
- Institute of Organic Chemistry; RWTH Aachen; Landoltweg 1 52074 Aachen Germany), Fax: (+49) 241-809-2665
| | - Nils Knop
- Institute of Organic Chemistry; RWTH Aachen; Landoltweg 1 52074 Aachen Germany), Fax: (+49) 241-809-2665
| | - Magnus Rueping
- Institute of Organic Chemistry; RWTH Aachen; Landoltweg 1 52074 Aachen Germany), Fax: (+49) 241-809-2665
- King Abdullah University of Science and Technology (KAUST); KAUST Catalysis Center (KCC); Thuwal 23955-6900 Saudi Arabia
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34
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Yang Z, He Y, Toste FD. Biomimetic Approach to the Catalytic Enantioselective Synthesis of Flavonoids. J Am Chem Soc 2016; 138:9775-8. [PMID: 27472195 PMCID: PMC5149420 DOI: 10.1021/jacs.6b05939] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein is reported the direct asymmetric addition of phenol nucleophiles to benzopyrylium salts as a means to produce enantioenriched flavonoid-like compounds. This enantioselective C-C bond construction was achieved through a chiral anion phase-transfer strategy that mimics the proposed biosynthesis of this structurally diverse set of natural products. The utility of this methodology was demonstrated in enantioselective synthesis of a 2,8-dioxabicyclo[3.3.1]nonane and a 2,4-diarylbenzopyran.
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Affiliation(s)
| | | | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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35
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Zhao C, Chen SB, Seidel D. Direct Formation of Oxocarbenium Ions under Weakly Acidic Conditions: Catalytic Enantioselective Oxa-Pictet–Spengler Reactions. J Am Chem Soc 2016; 138:9053-6. [DOI: 10.1021/jacs.6b05225] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Chenfei Zhao
- Department
of Chemistry and
Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Shawn B. Chen
- Department
of Chemistry and
Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Daniel Seidel
- Department
of Chemistry and
Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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36
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Millet A, Lefebvre Q, Rueping M. Visible-Light Photoredox-Catalyzed Giese Reaction: Decarboxylative Addition of Amino Acid Derived α-Amino Radicals to Electron-Deficient Olefins. Chemistry 2016; 22:13464-8. [PMID: 27321136 DOI: 10.1002/chem.201602257] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Indexed: 12/14/2022]
Abstract
A tin- and halide-free, visible-light photoredox-catalyzed Giese reaction was developed. Primary and secondary α-amino radicals were generated readily from amino acids in the presence of catalytic amounts of an iridium photocatalyst. The reactivity of the α-amino radicals has been evaluated for the functionalization of a variety of activated olefins.
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Affiliation(s)
- Anthony Millet
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Quentin Lefebvre
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany. .,KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
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37
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Organocatalytic Transfer Hydrogenation and Hydrosilylation Reactions. Top Curr Chem (Cham) 2016; 374:29. [DOI: 10.1007/s41061-016-0032-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 04/26/2016] [Indexed: 10/21/2022]
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38
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Chatupheeraphat A, Liao H, Mader S, Sako M, Sasai H, Atodiresei I, Rueping M. Asymmetrische Brønsted‐Säure‐katalysierte Substitution von Diarylmethanolen mit Thiolen und Alkoholen zur Synthese von chiralen Thioethern und Ethern. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511179] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Hsuan‐Hung Liao
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Steffen Mader
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR) Osaka University Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR) Osaka University Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Iuliana Atodiresei
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
| | - Magnus Rueping
- Institut für Organische Chemie RWTH Aachen Landoltweg 1 52074 Aachen Deutschland
- King Abdullah University of Science and Technology (KAUST) KAUST Catalysis Center (KCC) Thuwal 23955-6900 Saudi Arabien
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39
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Chatupheeraphat A, Liao HH, Mader S, Sako M, Sasai H, Atodiresei I, Rueping M. Asymmetric Brønsted Acid Catalyzed Substitution of Diaryl Methanols with Thiols and Alcohols for the Synthesis of Chiral Thioethers and Ethers. Angew Chem Int Ed Engl 2016; 55:4803-7. [DOI: 10.1002/anie.201511179] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 01/08/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Adisak Chatupheeraphat
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Hsuan-Hung Liao
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Steffen Mader
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Makoto Sako
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Hiroaki Sasai
- The Institute of Scientific and Industrial Research (ISIR); Osaka University; Mihogaoka, Ibaraki-shi Osaka 567-0047 Japan
| | - Iuliana Atodiresei
- 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
- King Abdullah University of Science and Technology (KAUST); KAUST Catalysis Center (KCC); Thuwal 23955-6900 Saudi Arabia
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40
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Lefebvre Q, Hoffmann N, Rueping M. Photoorganocatalysed and visible light photoredox catalysed trifluoromethylation of olefins and (hetero)aromatics in batch and continuous flow. Chem Commun (Camb) 2016; 52:2493-6. [DOI: 10.1039/c5cc09881e] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Trifluoromethylation of olefins and (hetero)aromatics with sodium triflinate as CF3source and readily accessible benzophenone derivatives as photosensitisers has been developed in batch and flow.
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Affiliation(s)
| | - Norbert Hoffmann
- CNRS
- Université de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims (UMR 6229)
- Equipe de Photochimie
- UFR Sciences
- France
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41
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Dasgupta S, Rivas T, Watson MP. Enantioselective Copper(I)-Catalyzed Alkynylation of Oxocarbenium Ions to Set Diaryl Tetrasubstituted Stereocenters. Angew Chem Int Ed Engl 2015; 54:14154-8. [PMID: 26403641 DOI: 10.1002/anie.201507373] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 08/29/2015] [Indexed: 12/12/2022]
Abstract
An enantioselective, copper(I)-catalyzed addition of terminal alkynes to isochroman ketals to set diaryl, tetrasubstituted stereocenters has been developed. The success of this reaction relies on identification of a Cu/PyBox catalyst capable of distinguishing the faces of the diaryl-substituted oxocarbenium ion. This challenging transformation enables efficient conversion of readily available, racemic ketals into high-value enantioenriched isochroman products with fully substituted stereogenic centers. High yields and enantiomeric excesses are observed for various isochroman ketals and an array of alkynes.
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Affiliation(s)
- Srimoyee Dasgupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Thomas Rivas
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Mary P Watson
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA).
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42
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Dasgupta S, Rivas T, Watson MP. Enantioselective Copper(I)‐Catalyzed Alkynylation of Oxocarbenium Ions to Set Diaryl Tetrasubstituted Stereocenters. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507373] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Srimoyee Dasgupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Thomas Rivas
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Mary P. Watson
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
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43
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Mo L, Wu LL, Wang S, Yao ZJ. Efficient Synthesis of Octahydrophenanthrene Derivatives with Mild Cascade Reactions of Isochromenylium Tetrafluoroborates and Bifunctional Styrenes. Org Lett 2015; 17:3314-7. [DOI: 10.1021/acs.orglett.5b01532] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Mo
- State Key Laboratory of Coordination
Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences,
School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Lin-Lin Wu
- State Key Laboratory of Coordination
Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences,
School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Shaozhong Wang
- State Key Laboratory of Coordination
Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences,
School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
| | - Zhu-Jun Yao
- State Key Laboratory of Coordination
Chemistry, Collaborative Innovation Center of Chemistry for Life Sciences,
School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, China
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44
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Kenny R, Liu F. Trifunctional Organocatalysts: Catalytic Proficiency by Cooperative Activation. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500179] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Srinivas HD, Maity P, Yap GPA, Watson MP. Enantioselective copper-catalyzed alkynylation of benzopyranyl oxocarbenium ions. J Org Chem 2015; 80:4003-16. [PMID: 25847687 DOI: 10.1021/acs.joc.5b00364] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have developed highly enantioselective, copper-catalyzed alkynylations of benzopyranyl acetals. By using a copper(I) catalyst equipped with a chiral bis(oxazoline) ligand, high yields and enantioselectivities are achieved in the alkynylation of widely available, racemic isochroman and chromene acetals to deliver α-chiral oxygen heterocycles. This method demonstrates that chiral organometallic nucleophiles can be successfully used in enantioselective additions to oxocarbenium ions.
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Affiliation(s)
- Harathi D Srinivas
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Prantik Maity
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Glenn P A Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Mary P Watson
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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46
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Luan Y, Barbato KS, Moquist PN, Kodama T, Schaus SE. Enantioselective synthesis of 1,2-dihydronaphthalene-1-carbaldehydes by addition of boronates to isochromene acetals catalyzed by tartaric acid. J Am Chem Soc 2015; 137:3233-6. [PMID: 25715172 PMCID: PMC4666678 DOI: 10.1021/jacs.5b00757] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tartaric acid is an ideal asymmetric catalyst as it is abundant, cheap, and environmentally friendly. (+)-Tartaric acid was found to catalyze a novel enantioselective [4 + 2] cycloaddition of isochromene acetals and vinylboronates. A variety of substituted isochromene acetals were tolerated, furnishing the desired dihydronaphthalenes and dihydrobenzofluorene products in good yields. High enantiomeric ratios (up to 98.5:1.5) and excellent diastereoselectivities (all >99:1) were observed employing 10 mol % of (+)-tartaric acid as the catalyst, in combination with 5 mol % of Ho(OTf)3.
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Affiliation(s)
- Yi Luan
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Keith S. Barbato
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Philip N. Moquist
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Tomohiro Kodama
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
| | - Scott E. Schaus
- Department of Chemistry, Boston University, 24 Cummington Street, Boston, Massachusetts 02215, United States
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Brimioulle R, Lenhart D, Maturi MM, Bach T. Enantioselective Catalysis of Photochemical Reactions. Angew Chem Int Ed Engl 2015; 54:3872-90. [DOI: 10.1002/anie.201411409] [Citation(s) in RCA: 459] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Indexed: 01/07/2023]
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48
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Brimioulle R, Lenhart D, Maturi MM, Bach T. Enantioselektive Katalyse photochemischer Reaktionen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411409] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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49
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Li B, Williams B, Smith AB. A mild, diastereoselective construction of cyclic and spirocyclic ketals employing a tandem photoisomerization/cyclization tactic. Org Lett 2015; 17:3-5. [PMID: 25489978 PMCID: PMC4295796 DOI: 10.1021/ol503116q] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Indexed: 01/02/2023]
Abstract
The cyclization of trans-δ-hydroxy enones to cyclic mixed ketals routinely requires superstoichiometric strong acid. By operating under a photoisomerization regime, the cyclization of trans-δ-hydroxy enones proceeds under catalytic Brønsted acid to provide cyclic ketals or unsaturated spiroketals in a highly diastereoselective fashion. A one-pot, two-step protocol was thus developed to provide cyclic methoxy ketals with a free β-hydroxy group for future functionalization.
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Affiliation(s)
| | | | - Amos B. Smith
- Department of Chemistry,
Laboratory for Research on the Structure of Matter and Monell Chemical
Senses Center, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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50
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Hsiao CC, Liao HH, Rueping M. Enantio- and Diastereoselective Access to Distant Stereocenters Embedded within Tetrahydroxanthenes: Utilizingortho-Quinone Methides as Reactive Intermediates in Asymmetric Brønsted Acid Catalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406587] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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