1
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Li RX, Chen Y, Huang LQ, Guan Z, He YH. Visible-Light Induced Radical Addition-Elimination Reaction for Constructing Allylic Sulfones from Sulfonyl Chlorides and Allyl Bromides. J Org Chem 2024; 89:4619-4627. [PMID: 38536672 DOI: 10.1021/acs.joc.3c02893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Allyl sulfones are commonly present in bioactive compounds and organic building blocks. This work introduces a photocatalytic radical addition-elimination reaction involving readily accessible sulfonyl chlorides and allyl bromides. It delivers structurally diverse allylic sulfones in moderate to excellent yields, showcasing a high tolerance to functional groups. Notably, this method operates under mild reaction conditions without the need for oxidants, stoichiometric reducing metals, or additives.
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Affiliation(s)
- Rui-Xue Li
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yuan Chen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Lan-Qian Huang
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhi Guan
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Yan-Hong He
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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2
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Quiclet-Sire B, Zard SZ. Some Aspects of α-(Acyloxy)alkyl Radicals in Organic Synthesis. Molecules 2023; 28:7561. [PMID: 38005282 PMCID: PMC10673534 DOI: 10.3390/molecules28227561] [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: 10/16/2023] [Revised: 11/08/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
The preparation and use of α-(acyloxy)alkyl xanthates to generate and capture α-(acyloxy)alkyl radicals is briefly reviewed. Their inter- and intramolecular additions to both activated and unactivated, electronically unbiased, alkenes, and to (hetero)aromatic rings, as well as their radical allylation and vinylation reactions are described. Application to the total synthesis of two 4-hydroxytetralone natural products is also presented.
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Affiliation(s)
| | - Samir Z. Zard
- Laboratoire de Synthèse Organique associé au C.N.R.S., UMR 7652, Ecole Polytechnique, 91128 Palaiseau, France;
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3
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Nambo M, Maekawa Y, Crudden CM. Desulfonylative Transformations of Sulfones by Transition-Metal Catalysis, Photocatalysis, and Organocatalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05608] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
| | - Yuuki Maekawa
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
- Department of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario, Canada, K7L 4 V1
| | - Cathleen M. Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Chikusa, Nagoya, Japan, 464-8602
- Department of Chemistry, Queen’s University, Chernoff Hall, Kingston, Ontario, Canada, K7L 4 V1
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4
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Chu XQ, Ge D, Cui YY, Shen ZL, Li CJ. Desulfonylation via Radical Process: Recent Developments in Organic Synthesis. Chem Rev 2021; 121:12548-12680. [PMID: 34387465 DOI: 10.1021/acs.chemrev.1c00084] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
As the "chemical chameleon", sulfonyl-containing compounds and their variants have been merged with various types of reactions for the efficient construction of diverse molecular architectures by taking advantage of their incredible reactive flexibility. Currently, their involvement in radical transformations, in which the sulfonyl group typically acts as a leaving group via selective C-S, N-S, O-S, S-S, and Se-S bond cleavage/functionalization, has facilitated new bond formation strategies which are complementary to classical two-electron cross-couplings via organometallic or ionic intermediates. Considering the great influence and synthetic potential of these novel avenues, we summarize recent advances in this rapidly expanding area by discussing the reaction designs, substrate scopes, mechanistic studies, and their limitations, outlining the state-of-the-art processes involved in radical-mediated desulfonylation and related transformations. With a specific emphasis on their synthetic applications, we believe this review will be useful for medicinal and synthetic organic chemists who are interested in radical chemistry and radical-mediated desulfonylation in particular.
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Affiliation(s)
- Xue-Qiang Chu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Danhua Ge
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yan-Ying Cui
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Zhi-Liang Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao-Jun Li
- Department of Chemistry and FQRNT Centre for Green Chemistry and Catalysis, McGill University, Montreal, Quebec H3A 0B8, Canada
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5
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Nambo M, Tahara Y, Yim JCH, Yokogawa D, Crudden CM. Synthesis of quaternary centres by single electron reduction and alkylation of alkylsulfones. Chem Sci 2021; 12:4866-4871. [PMID: 34168761 PMCID: PMC8179647 DOI: 10.1039/d1sc00133g] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A new method for the generation of tertiary radicals through single electron reduction of alkylsulfones promoted by Zn and 1,10-phenanthroline has been developed. These radicals could be employed in the Giese reaction, affording structurally diverse quaternary products in good yields. With the high modularity and functional group compatibility of sulfones, the utility of this method was demonstrated by intramolecular and iterative reactions to give complex structures. The radical generation process was investigated by control experiments and theoretical calculations. A new method for the generation of tertiary radicals through single electron reduction of alkylsulfones promoted by Zn and 1,10-phenanthroline has been developed.![]()
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Affiliation(s)
- Masakazu Nambo
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Yasuyo Tahara
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Jacky C-H Yim
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan
| | - Daisuke Yokogawa
- Graduate School of Arts and Science, The University of Tokyo Komaba, Meguro-ku Tokyo 153-8902 Japan
| | - Cathleen M Crudden
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University Chikusa Nagoya Aichi 464-8601 Japan .,Department of Chemistry, Queen's University Chernoff Hall Kingston Ontario K7L 3N6 Canada
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6
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7
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Xia Y, Studer A. Diversity‐Oriented Desulfonylative Functionalization of Alkyl Allyl Sulfones. Angew Chem Int Ed Engl 2019; 58:9836-9840. [DOI: 10.1002/anie.201903668] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/02/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Yong Xia
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Germany
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8
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Xia Y, Studer A. Diversity‐Oriented Desulfonylative Functionalization of Alkyl Allyl Sulfones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903668] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yong Xia
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstrasse 40 48149 Münster Germany
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9
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Affiliation(s)
- Manjula D. Rathnayake
- Department of Chemistry Oklahoma State University 107, Physical Science 74078 Stillwater Oklahoma United States
| | - Jimmie D. Weaver
- Department of Chemistry Oklahoma State University 107, Physical Science 74078 Stillwater Oklahoma United States
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10
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Wu K, Wang L, Colón‐Rodríguez S, Flechsig G, Wang T. Amidyl Radical Directed Remote Allylation of Unactivated sp
3
C−H Bonds by Organic Photoredox Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Kui Wu
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Lushun Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Sonivette Colón‐Rodríguez
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Gerd‐Uwe Flechsig
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Ting Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
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11
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Wu K, Wang L, Colón‐Rodríguez S, Flechsig G, Wang T. Amidyl Radical Directed Remote Allylation of Unactivated sp
3
C−H Bonds by Organic Photoredox Catalysis. Angew Chem Int Ed Engl 2019; 58:1774-1778. [DOI: 10.1002/anie.201811004] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/21/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Kui Wu
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Lushun Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Sonivette Colón‐Rodríguez
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Gerd‐Uwe Flechsig
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
| | - Ting Wang
- Department of ChemistryUniversity at Albany, State University of New York 1400 Washington Avenue Albany NY 12222 USA
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12
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13
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Qi J, Zheng J, Cui S. Fe(III)-Catalyzed Hydroallylation of Unactivated Alkenes with Morita–Baylis–Hillman Adducts. Org Lett 2018; 20:1355-1358. [DOI: 10.1021/acs.orglett.8b00108] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jifeng Qi
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Jing Zheng
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Sunliang Cui
- Institute
of Drug Discovery and Design, College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
- State
Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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14
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Lei X, Zheng L, Zhang C, Shi X, Chen Y. Allylic C-S Bond Construction through Metal-Free Direct Nitroalkene Sulfonation. J Org Chem 2018; 83:1772-1778. [PMID: 29355324 DOI: 10.1021/acs.joc.7b02595] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A metal-free, open-flask protocol was developed for the preparation of allylic sulfones through direct condensation of sodium arylsulfinates and β,β-disubstituted nitroalkenes. The key step of this process was the Lewis base-promoted equilibrium between nitroalkenes and allylic nitro compounds. Through this process, the readily available conjugated nitroalkenes can be easily converted into allylic nitro compounds, which contain more reactive C═C bonds toward the sulfonyl radical addition. As a result, allylic sulfones were prepared in excellent yields with a broad substrate scope under mild conditions.
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Affiliation(s)
- Xue Lei
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology , Wuhan 430073, P. R. China
| | - Lei Zheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology , Wuhan 430073, P. R. China
| | - Chuanxin Zhang
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology , Wuhan 430073, P. R. China
| | - Xiaodong Shi
- The Department of Chemistry, University of South Florida , 4202 E. Fowler Avenue, Tampa, Florida 33620, United States
| | - Yunfeng Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology , Wuhan 430073, P. R. China
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15
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Li C, Li J, Tan C, Wu W, Jiang H. DDQ-mediated regioselective C–S bond formation: efficient access to allylic sulfides. Org Chem Front 2018. [DOI: 10.1039/c8qo00799c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A novel metal-free dehydrocoupling approach for constructing allylic sulfides via oxidative allylic C–H functionalization with high atom- and step-economy has been developed.
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Affiliation(s)
- Chunsheng Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Jianxiao Li
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Chaowei Tan
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
- P. R. China
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16
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Kalz KF, Kraehnert R, Dvoyashkin M, Dittmeyer R, Gläser R, Krewer U, Reuter K, Grunwaldt J. Future Challenges in Heterogeneous Catalysis: Understanding Catalysts under Dynamic Reaction Conditions. ChemCatChem 2017; 9:17-29. [PMID: 28239429 PMCID: PMC5299475 DOI: 10.1002/cctc.201600996] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Indexed: 01/12/2023]
Abstract
In the future, (electro-)chemical catalysts will have to be more tolerant towards a varying supply of energy and raw materials. This is mainly due to the fluctuating nature of renewable energies. For example, power-to-chemical processes require a shift from steady-state operation towards operation under dynamic reaction conditions. This brings along a number of demands for the design of both catalysts and reactors, because it is well-known that the structure of catalysts is very dynamic. However, in-depth studies of catalysts and catalytic reactors under such transient conditions have only started recently. This requires studies and advances in the fields of 1) operando spectroscopy including time-resolved methods, 2) theory with predictive quality, 3) kinetic modelling, 4) design of catalysts by appropriate preparation concepts, and 5) novel/modular reactor designs. An intensive exchange between these scientific disciplines will enable a substantial gain of fundamental knowledge which is urgently required. This concept article highlights recent developments, challenges, and future directions for understanding catalysts under dynamic reaction conditions.
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Affiliation(s)
- Kai F. Kalz
- Institute of Catalysis Research and Technology (IKFT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
| | - Ralph Kraehnert
- Department of ChemistryTechnische Universität BerlinD-10623BerlinGermany
| | - Muslim Dvoyashkin
- Institute of Chemical TechnologyUniversität LeipzigD-04103LeipzigGermany
| | - Roland Dittmeyer
- Institute for Micro Process Engineering (IMVT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
| | - Roger Gläser
- Institute of Chemical TechnologyUniversität LeipzigD-04103LeipzigGermany
| | - Ulrike Krewer
- Institute of Energy and Process Systems EngineeringTU BraunschweigD-38106BraunschweigGermany
| | - Karsten Reuter
- Chair for Theoretical Chemistry and Catalysis Research CenterTechnische Universität MünchenD-85747GarchingGermany
| | - Jan‐Dierk Grunwaldt
- Institute of Catalysis Research and Technology (IKFT)Karlsruhe Institute of Technology (KIT)D-76344Eggenstein-LeopoldshafenGermany
- Institute for Chemical Technology and Polymer Chemistry (ITCP)Karlsruhe Institute of Technology (KIT)D-76131KarlsruheGermany
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17
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Kihara N, Mitsuhashi Y, Sato M, Hirose SI, Goudo E, Uzawa Y, Shirai N, Hamamoto S, Iwasaki R, Fujioka A. 2-(Phenylseleno)ethanesulfon-amide as a novel protecting group for aniline that can be deprotected by a radical reaction. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Pan C, Chen R, Shao W, Yu JT. Metal-free radical addition/cyclization of alkynoates with xanthates towards 3-(β-carbonyl)coumarins. Org Biomol Chem 2016; 14:9033-9. [DOI: 10.1039/c6ob01732k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dilauroyl peroxide-promoted radical carboannulation of alkynoates with xanthates was developed, affording 4-aryl-3-(β-carbonyl) coumarins in moderate to good yields.
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Affiliation(s)
- Changduo Pan
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
- School of Petrochemical Engineering
| | - Rongzhen Chen
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
- School of Petrochemical Engineering
| | - Weile Shao
- School of Chemistry & Environmental Engineering
- Jiangsu University of Technology
- Changzhou 213001
- P. R. China
| | - Jin-Tao Yu
- School of Petrochemical Engineering
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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19
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Medina FG, Marrero JG, Macías-Alonso M, González MC, Córdova-Guerrero I, Teissier García AG, Osegueda-Robles S. Coumarin heterocyclic derivatives: chemical synthesis and biological activity. Nat Prod Rep 2015; 32:1472-507. [PMID: 26151411 DOI: 10.1039/c4np00162a] [Citation(s) in RCA: 306] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review highlights the broad range of science that has arisen from the synthesis of coumarin-linked and fused heterocycle derivatives. Specific topics include their synthesis and biological activity.
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Affiliation(s)
- Fernanda G Medina
- Instituto Politécnico Nacional, Unidad Profesional Interdisciplinaria de Ingeniería Campus Guanajuato, Av. Mineral de Valenciana, No. 200, Col. Fracc. Industrial Puerto Interior, C.P. 36275 Silao de la Victoria, Guanajuato, Mexico.
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20
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Lewis acid mediated diastereoselective intermolecular radical addition/trapping with pyrazolidinone acrylimides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Abstract
Radical allylations represent effective routes to various alkenes, but to date they have relied chiefly on organostannane derivatives and still suffer from significant limitations with respect to the substitution pattern of the starting allylating agent. Indeed, while substituents at the β-position relative to the radical leaving group are well-tolerated, introduction of α-substituents induces a major complication due to the rapid and usually irreversible isomerization of the starting allylating agents. Although a number of research groups have made substantial efforts to develop heavy-metal-free radical allylations, methods compatible with α-substitution of the allylating agent are still scarce. Furthermore, quite a few systems are limited by the relative inaccessibility of the substrates. This Account summarizes our sustained efforts regarding the development of allylic alcohols into "ideal" radical allylating agents and presents published as well as some unpublished results. The systems we have developed combine the use of readily available xanthates and allylic alcohol derivatives under metal-free conditions to furnish not only alkenes but also aldehydes and saturated and unsaturated ketones through the virtually unprecedented homolytic cleavage of the normally strong C-O or C-C bond. The former route hinges on first converting the allylic alcohol into a 2-fluoro-6-pyridoxy derivative by reacting the corresponding alcoholate with 2,6-difluoropyridine, while the latter relies on attaching a cumyl group to the carbon bearing the free allylic alcohol. Either substrate is then exposed to the action of a suitable xanthate in the presence of a stoichiometric amount of a peroxide, usually lauroyl peroxide (DLP) in refluxing ethyl acetate or di-tert-butyl peroxide (TBHP) in refluxing chlorobenzene for the more difficult cases. Even though C-O or C-C bond homolysis leads to a stabilized 2-fluoro-6-pyridinyloxyl radical or a cumyl radical, respectively, the β-scission in both cases is relatively slow and at the lower limit of useful elementary radical steps. The kinetic barrier of the fragmentation can nevertheless be overcome because of the long relative lifetime of radicals generated by the degenerate transfer of the xanthate group, and this is a key element for success. This novel technology offers numerous advantages. The starting activated allylic alcohol derivatives are readily accessible in two steps from aldehydes or ketones. They can also be obtained by base-induced opening of epoxides. Numerous functional groups are tolerated under the mild reaction conditions for the radical addition-elimination, as nicely illustrated by over 150 examples of radical allylations, not all of which can be included in the present Account. In addition, substitution at both the α- and β-positions of the allylating agent is possible, a rare feature in this area.
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Affiliation(s)
- Laurent Debien
- Laboratoire de Synthèse
Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Béatrice Quiclet-Sire
- Laboratoire de Synthèse
Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau Cedex, France
| | - Samir Z. Zard
- Laboratoire de Synthèse
Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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22
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Qin L, Zard SZ. Radical-based route to 2-(trifluoromethyl)-1,3,4-oxadiazoles and trifluoromethyl-substituted polycyclic 1,2,4-triazoles and dihydrofurans. Org Lett 2015; 17:1577-80. [PMID: 25732871 DOI: 10.1021/acs.orglett.5b00457] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
O-Ethyl S-[5-(trifluoromethyl)-1,3,4-oxadiazol-2-yl]methyl xanthate was readily prepared on a large scale and shown to undergo very efficient intermolecular radical additions to unactivated alkenes. The products were further elaborated by exploiting both radical and ionic processes to provide a variety of trifluoromethyl-substituted derivatives, including medicinally relevant triazoles. In particular, the application of a radical allylation on the initial adducts leads to structures that are able to undergo intramolecular [4 + 2] cycloaddition reactions.
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Affiliation(s)
- Ling Qin
- Laboratoire de SynthèseOrganique, UMR 7652 CNRS/EcolePolytechnique Palaiseau 91128 Cedex, France
| | - Samir Z Zard
- Laboratoire de SynthèseOrganique, UMR 7652 CNRS/EcolePolytechnique Palaiseau 91128 Cedex, France
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23
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Affiliation(s)
- Chang-Liang Sun
- Beijing National Laboratory of Molecular Sciences (BNLMS) and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Green Chemistry Center, Peking University , 202 Chengfu Road, 098#, Beijing 100871, China
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24
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Abstract
TEMPO-mediated reactions of alkenyl hydrazones afforded azaheterocycles via sp3 C–H allylic amination. The transformation is featured by a sequence of remote allylic H-radical shift and allylic homolytic substitution with hydrazone radicals.
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Affiliation(s)
- Xu Zhu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371, Singapore
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Traoré M, Mietton F, Maubon D, Peuchmaur M, Francisco Hilário F, Pereira de Freitas R, Bougdour A, Curt A, Maynadier M, Vial H, Pelloux H, Hakimi MA, Wong YS. Flexible Synthesis and Evaluation of Diverse Anti-Apicomplexa Cyclic Peptides. J Org Chem 2013; 78:3655-75. [DOI: 10.1021/jo4001492] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Mariam Traoré
- Département de Pharmacochimie Moléculaire, Université Joseph Fourier-Grenoble 1, CNRS UMR 5063, CNRS ICMG FR 2607, bâtiment André
Rassat, 470 rue de la Chimie, F-38041 Grenoble Cedex 9, France
| | - Flore Mietton
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
| | - Danièle Maubon
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
- Laboratoire de Parasitologie-Mycologie, Département des Agents Infectieux, Centre Hospitalier Universitaire, BP
217, 38043 Grenoble cedex 9, France
| | - Marine Peuchmaur
- Département de Pharmacochimie Moléculaire, Université Joseph Fourier-Grenoble 1, CNRS UMR 5063, CNRS ICMG FR 2607, bâtiment André
Rassat, 470 rue de la Chimie, F-38041 Grenoble Cedex 9, France
| | - Flaviane Francisco Hilário
- Département de Pharmacochimie Moléculaire, Université Joseph Fourier-Grenoble 1, CNRS UMR 5063, CNRS ICMG FR 2607, bâtiment André
Rassat, 470 rue de la Chimie, F-38041 Grenoble Cedex 9, France
- Departamento de Quı́mica, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais,
Brasil
- CAPES Foundation, Ministry of Education of Brazil, Brasilia DF 70040-020, Brazil
| | | | - Alexandre Bougdour
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
| | - Aurélie Curt
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
- Laboratoire de Parasitologie-Mycologie, Département des Agents Infectieux, Centre Hospitalier Universitaire, BP
217, 38043 Grenoble cedex 9, France
| | - Marjorie Maynadier
- Dynamique
des Interactions Membranaires Normales et Pathologiques, Université de Montpellier 2,
CNRS UMR 5235, CP 107, Place E. Bataillon, F-34095 Montpellier Cedex
5, France
| | - Henri Vial
- Dynamique
des Interactions Membranaires Normales et Pathologiques, Université de Montpellier 2,
CNRS UMR 5235, CP 107, Place E. Bataillon, F-34095 Montpellier Cedex
5, France
| | - Hervé Pelloux
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
- Laboratoire de Parasitologie-Mycologie, Département des Agents Infectieux, Centre Hospitalier Universitaire, BP
217, 38043 Grenoble cedex 9, France
| | - Mohamed-Ali Hakimi
- Laboratoire Adaptation et Pathogénie des Micro-organismes, Université Joseph Fourier-Grenoble 1, CNRS UMR 5163, BP 170, F-38042 Grenoble Cedex 9, France
| | - Yung-Sing Wong
- Département de Pharmacochimie Moléculaire, Université Joseph Fourier-Grenoble 1, CNRS UMR 5063, CNRS ICMG FR 2607, bâtiment André
Rassat, 470 rue de la Chimie, F-38041 Grenoble Cedex 9, France
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Quiclet-Sire B, Zard SZ. Some aspects of radical chemistry in the assembly of complex molecular architectures. Beilstein J Org Chem 2013; 9:557-76. [PMID: 23616797 PMCID: PMC3629037 DOI: 10.3762/bjoc.9.61] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Accepted: 02/25/2013] [Indexed: 11/23/2022] Open
Abstract
This review article describes briefly some of the radical processes developed in the authors' laboratory as they pertain to the concise assembly of complex molecular scaffolds. The emphasis is placed on the use of nitrogen-centred radicals, on the degenerate addition-transfer of xanthates, especially on its potential for intermolecular carbon-carbon bond formation, and on the generation and capture of radicals through electron transfer processes.
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Affiliation(s)
- Béatrice Quiclet-Sire
- Laboratoire de Synthèse Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau, France
| | - Samir Z Zard
- Laboratoire de Synthèse Organique, CNRS UMR 7652, Ecole Polytechnique, 91128 Palaiseau, France
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Huang Z, Xu J. One-pot synthesis of symmetric 1,7-dicarbonyl compounds via a tandem radical addition–elimination–addition reaction. RSC Adv 2013. [DOI: 10.1039/c3ra42932f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Französische Chemiepreise 2012. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201208345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Rouquet G, Robert F, Méreau R, Castet F, Landais Y. Allylsilanes in “Tin-free” Oximation, Alkenylation, and Allylation of Alkyl Halides. Chemistry 2011; 17:13904-11. [DOI: 10.1002/chem.201101842] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Indexed: 11/10/2022]
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Lapointe G, Schenk K, Renaud P. Concise Synthesis of Pyrrolidine and Indolizidine Alkaloids by a Highly Convergent Three‐Component Reaction. Chemistry 2011; 17:3207-12. [DOI: 10.1002/chem.201003137] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Indexed: 11/11/2022]
Affiliation(s)
- Guillaume Lapointe
- Departement für Chemie und Biochemie, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland), Fax: (+41) 31‐631‐3426
| | - Kurt Schenk
- École Polytechnique Fédérale de Lausanne, Laboratoire de Cristallographie, Le Cubotron, Dorigny, 1015 Lausanne (Switzerland)
| | - Philippe Renaud
- Departement für Chemie und Biochemie, University of Bern, Freiestrasse 3, 3012 Bern (Switzerland), Fax: (+41) 31‐631‐3426
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Han X, Zhang Y, Wu J. Mild Two-Step Process for the Transition-Metal-Free Synthesis of Carbon−Carbon Bonds from Allylic Alcohols/Ethers and Grignard Reagents. J Am Chem Soc 2010; 132:4104-6. [DOI: 10.1021/ja100747n] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinping Han
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
| | - Yanhua Zhang
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755
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