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Sudarikov DV, Nikitina LE, Rollin P, Izmest’ev ES, Rubtsova SA. Monoterpene Thiols: Synthesis and Modifications for Obtaining Biologically Active Substances. Int J Mol Sci 2023; 24:15884. [PMID: 37958865 PMCID: PMC10649346 DOI: 10.3390/ijms242115884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 10/26/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
Monoterpene thiols are one of the classes of natural flavors that impart the smell of citrus fruits, grape must and wine, black currants, and guava and are used as flavoring agents in the food and perfume industries. Synthetic monoterpene thiols have found an application in asymmetric synthesis as chiral auxiliaries, derivatizing agents, and ligands for metal complex catalysis and organocatalysts. Since monoterpenes and monoterpenoids are a renewable source, there are emerging trends to use monoterpene thiols as monomers for producing new types of green polymers. Monoterpene thioderivatives are also known to possess antioxidant, anticoagulant, antifungal, and antibacterial activity. The current review covers methods for the synthesis of acyclic, mono-, and bicyclic monoterpene thiols, as well as some investigations related to their usage for the preparation of the compounds with antimicrobial properties.
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Affiliation(s)
- Denis V. Sudarikov
- Institute of Chemistry, Federal Research Center “Komi Scientific Center”, Ural Branch, Russian Academy of Sciences, 167000 Syktyvkar, Russia; (E.S.I.); (S.A.R.)
| | - Liliya E. Nikitina
- General and Organic Chemistry Department, Kazan State Medical University, 49 Butlerov St., 420012 Kazan, Russia;
| | - Patrick Rollin
- Institute of Organic and Analytical Chemistry (ICOA), Université d’Orléans et the French National Center for Scientific Research (CNRS), UMR 7311, BP 6759, F-45067 Orléans, France;
| | - Evgeniy S. Izmest’ev
- Institute of Chemistry, Federal Research Center “Komi Scientific Center”, Ural Branch, Russian Academy of Sciences, 167000 Syktyvkar, Russia; (E.S.I.); (S.A.R.)
| | - Svetlana A. Rubtsova
- Institute of Chemistry, Federal Research Center “Komi Scientific Center”, Ural Branch, Russian Academy of Sciences, 167000 Syktyvkar, Russia; (E.S.I.); (S.A.R.)
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2
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Sulfide‐Catalyzed Diastereoselective Spirocyclopropanation: Constructing Spiro‐cyclopropanyl‐pyrazolones From α‐Arylidenepyrazolones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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3
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Ilchenko NO, Sudarikov DV, Slepukhin PA, Rubtsova SA, Kutchin AV. Synthesis of Chiral CF
3
‐Contaning Pinane‐Type Hydroxythiols. ChemistrySelect 2021. [DOI: 10.1002/slct.202002657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nikita O. Ilchenko
- Institute of Chemistry FRC “Komi Scientific Centre” Ural Branch of the Russian Academy of Sciences Pervomayskaya St. 28 167000 Syktyvkar Komi Republic Russia
| | - Denis V. Sudarikov
- Institute of Chemistry FRC “Komi Scientific Centre” Ural Branch of the Russian Academy of Sciences Pervomayskaya St. 28 167000 Syktyvkar Komi Republic Russia
| | - Pavel A. Slepukhin
- Postovsky Institute of Organic Synthesis Ural Branch of the Russian Academy of Sciences S. Kovalevskaya St. 22 620137 Ekaterinburg Russia
| | - Svetlana A. Rubtsova
- Institute of Chemistry FRC “Komi Scientific Centre” Ural Branch of the Russian Academy of Sciences Pervomayskaya St. 28 167000 Syktyvkar Komi Republic Russia
| | - Alexandr V. Kutchin
- Institute of Chemistry FRC “Komi Scientific Centre” Ural Branch of the Russian Academy of Sciences Pervomayskaya St. 28 167000 Syktyvkar Komi Republic Russia
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4
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Li L, Yang M, He Q, Fan R. Conversion of anilines to chiral benzylic amines via formal one-carbon insertion into aromatic C-N bonds. Nat Commun 2020; 11:4805. [PMID: 32968063 PMCID: PMC7511326 DOI: 10.1038/s41467-020-18593-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 08/27/2020] [Indexed: 11/09/2022] Open
Abstract
Insertion of atoms into aromatic carbon-nitrogen bonds is an appealing method for the synthesis of nitrogen-containing molecules and it has the advantage of the availability and abundance of anilines. However, the direct cleavage of aromatic carbon-nitrogen bonds is challenging due to the particularly inert and stable nature of these bonds. Here we report a formal, enantioselective one-carbon insertion into an aromatic carbon-nitrogen bond via an aromaticity dissembly-reconstruction process to directly convert anilines to chiral α-branched benzylic amines. The process involves oxidative dearomatization of para-substituted anilines, chiral sulfur ylide-mediated asymmetric aziridination, and subsequent rearrangement. Chiral sulfur ylides serve as one-carbon insertion units. Atom insertion into aromatic carbon-nitrogen (C-N) bonds is useful for the synthesis of nitrogen-containing molecules, but challenging due to the inert nature of these bonds. Here, the authors report one-carbon insertion into aromatic C-N bonds to directly convert anilines to chiral benzylic amines.
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Affiliation(s)
- Lei Li
- Department of Chemistry, Fudan University, 200433, Shanghai, China
| | - Min Yang
- Department of Forensic Science, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Gannan Medical University, Ganzhou, 341000, China
| | - Qiuqin He
- Department of Chemistry, Fudan University, 200433, Shanghai, China
| | - Renhua Fan
- Department of Chemistry, Fudan University, 200433, Shanghai, China.
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5
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Synthesis of Epoxides from Alkyl Bromides and Alcohols with in Situ Generation of Dimethyl Sulfonium Ylide in DMSO Oxidations. J Org Chem 2020; 85:537-547. [PMID: 31808693 DOI: 10.1021/acs.joc.9b02621] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Direct conversion of the readily available alkyl bromides and alcohols to value-added epoxides using dimethyl sulfoxide (DMSO) under mild reaction conditions has been developed. Benzyl and allyl bromides, and activated and unactivated alcohols all proceeded smoothly to give epoxides in high to excellent yield. Dimethyl sulfide, generated by DMSO oxidations, was in situ elaborated to form the substituted dimethyl sulfonium ylide species that participates in the Corey-Chaykovsky epoxidation in a domino and one-pot fashion, respectively.
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6
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Kang JW, Li X, Chen FY, Luo Y, Zhang SC, Kang B, Peng C, Tian X, Han B. Protecting group-directed annulations of tetra-substituted oxindole olefins and sulfur ylides: regio- and chemoselective synthesis of cyclopropane- and dihydrofuran-fused spirooxindoles. RSC Adv 2019; 9:12255-12264. [PMID: 35515867 PMCID: PMC9063500 DOI: 10.1039/c9ra02192b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/10/2019] [Indexed: 12/21/2022] Open
Abstract
Protecting group-controlled annulations of tetra-substituted oxindole olefins and sulfur ylides have been achieved for the synthesis of multifunctional cyclopropane- and dihydrofuran-fused spirooxindoles. Under precise annulation regulation, a variety of cyclopropane- and dihydrofuran-fused spirooxindoles containing vicinal quaternary carbon centers were produced in up to 90% yield with up to 20 : 1 dr. This reaction demonstrates high regio-, chemo- and diastereoselectivity, broad functional group tolerance and gram-scale capacity.
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Affiliation(s)
- Jing-Wen Kang
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Xiang Li
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Fei-Yu Chen
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Yuan Luo
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Shu-Cang Zhang
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Bin Kang
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Cheng Peng
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
| | - Xu Tian
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University Guangzhou 511436 P. R. China
| | - Bo Han
- State Key Laboratory Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137 P. R. China
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7
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Wu C, Zhou J, He G, Li H, Yang Q, Wang R, Zhou Y, Liu H. Ruthenium(ii)-catalyzed selective C–H bond activation of imidamides and coupling with sulfoxonium ylides: an efficient approach for the synthesis of highly functional 3-ketoindoles. Org Chem Front 2019. [DOI: 10.1039/c9qo00048h] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Ruthenium-catalyzed selective C–H bond activation of imidamides and annulation of sulfoxonium ylides were achieved, which afforded a series of 3-ketoindole derivatives in good yields, with good functional group compatibility.
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Affiliation(s)
- Chenglin Wu
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
- China
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
| | - Jianhui Zhou
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Guoxue He
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Huihui Li
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Qiaolan Yang
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Run Wang
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Yu Zhou
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
- Shanghai Institute of Materia Medica
- Chinese Academy of Sciences
- Shanghai 201203
- China
| | - Hong Liu
- School of Pharmacy
- China Pharmaceutical University
- Nanjing 210009
- China
- State Key Laboratory of Drug Research and CAS Key Laboratory of Receptor Research
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8
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Li X, Liu YQ, Kang JW, Chen FY, He XG, Yuan SS, Guo L, Peng C, Huang W. Synthesis of Vinylcyclopropane-Fused Pyrazolone Derivatives by Sulfur Ylide-Initiated 1,6-Michael Addition-Cyclization Reactions. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiang Li
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine; School of Pharmacy; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Yan-Qing Liu
- State Key Laboratory Breeding Base of Systematic Research; Development and Utilization of Chinese Medicine Resources; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Jing-Wen Kang
- State Key Laboratory Breeding Base of Systematic Research; Development and Utilization of Chinese Medicine Resources; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Fei-Yu Chen
- State Key Laboratory Breeding Base of Systematic Research; Development and Utilization of Chinese Medicine Resources; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Xi-Guo He
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine; School of Pharmacy; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Shan-Shan Yuan
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine; School of Pharmacy; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Li Guo
- State Key Laboratory Breeding Base of Systematic Research; Development and Utilization of Chinese Medicine Resources; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Cheng Peng
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine; School of Pharmacy; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
- State Key Laboratory Breeding Base of Systematic Research; Development and Utilization of Chinese Medicine Resources; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
| | - Wei Huang
- Ministry of Education Key Laboratory of Standardization of Chinese Medicine; School of Pharmacy; Chengdu University of Traditional Chinese Medicine; 611137 Chengdu China
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9
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Jia P, Huang Y. A Formal [5+1] Annulation Reaction of Sulfur Ylides and 2-(1H-indol-2-yl)phenols: Access to Indole-Fused 4H-benzo[e][1,3]oxazines. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800573] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Penghao Jia
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 People's Republic of China
| | - You Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry; Nankai University; Tianjin 300071 People's Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin People's Republic of China
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10
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New camphor hybrids: lipophilic enhancement improves antimicrobial efficacy against drug-resistant pathogenic microbes and intestinal worms. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2186-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Wu GL, Wu QP. Metal-Free Multicomponent Reaction for Synthesis of 4,5-Disubstituted 1,2,3-(NH
)-Triazoles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701587] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Guang-Long Wu
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 People's Republic of China
| | - Qin-Pei Wu
- School of Chemistry and Chemical Engineering; Beijing Institute of Technology; Beijing 100081 People's Republic of China
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12
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Vaitla J, Bayer A, Hopmann KH. Synthesis of Indoles and Pyrroles Utilizing Iridium Carbenes Generated from Sulfoxonium Ylides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201610520] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Janakiram Vaitla
- Department of Chemistry and Centre for Theoretical and Computational Chemistry (CTCC); University of Tromsø; 9037 Tromsø Norway
| | - Annette Bayer
- Department of Chemistry; University of Tromsø; 9037 Tromsø Norway
| | - Kathrin H. Hopmann
- Department of Chemistry and Centre for Theoretical and Computational Chemistry (CTCC); University of Tromsø; 9037 Tromsø Norway
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13
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Vaitla J, Bayer A, Hopmann KH. Synthesis of Indoles and Pyrroles Utilizing Iridium Carbenes Generated from Sulfoxonium Ylides. Angew Chem Int Ed Engl 2017; 56:4277-4281. [DOI: 10.1002/anie.201610520] [Citation(s) in RCA: 140] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Janakiram Vaitla
- Department of Chemistry and Centre for Theoretical and Computational Chemistry (CTCC); University of Tromsø; 9037 Tromsø Norway
| | - Annette Bayer
- Department of Chemistry; University of Tromsø; 9037 Tromsø Norway
| | - Kathrin H. Hopmann
- Department of Chemistry and Centre for Theoretical and Computational Chemistry (CTCC); University of Tromsø; 9037 Tromsø Norway
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14
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Li C, Jiang K, Ouyang Q, Liu TY, Chen YC. [3 + 1]- and [3 + 2]-Cycloadditions of Azaoxyallyl Cations and Sulfur Ylides. Org Lett 2016; 18:2738-41. [PMID: 27199108 DOI: 10.1021/acs.orglett.6b01194] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chao Li
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Kun Jiang
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Qin Ouyang
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Tian-Yu Liu
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
| | - Ying-Chun Chen
- College
of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
- Key
Laboratory of Drug-Targeting and Drug Delivery System of the Ministry
of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
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15
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Gao F, Huang Y. A Sulfur Ylides-Mediated Domino Benzannulation Strategy to Construct Biaryls, Alkenylated and Alkynylated Benzene Derivatives. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400176] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Okuma K, Matsui H, Mori Y. Reaction of Seleno- or Thiofenchone with Propiolic Acid: Wagner-Meerwein Rearrangement. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kentaro Okuma
- Department of Chemistry; Fukuoka University; Jonan-Ku Fukuoka 814-0180 Japan
| | - Hiroyuki Matsui
- Department of Chemistry; Fukuoka University; Jonan-Ku Fukuoka 814-0180 Japan
| | - Yuichi Mori
- Department of Chemistry; Fukuoka University; Jonan-Ku Fukuoka 814-0180 Japan
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17
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Xu HD, Cai MQ, He WJ, Hu WH, Shen MH. Interception of benzyne with thioethers: a facile access to sulfur ylides under mild conditions. RSC Adv 2014. [DOI: 10.1039/c3ra47206j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A fluoride anion kicks off the generation of a high energetic species benzyne, which enables two successive trapping reactions.
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Affiliation(s)
- Hua-Dong Xu
- Shanghai Engineering Research Centre of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
| | - Mao-Qiang Cai
- Shanghai Engineering Research Centre of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Wei-Jie He
- Shanghai Engineering Research Centre of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Wen-Hao Hu
- Shanghai Engineering Research Centre of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai, China
| | - Mei-Hua Shen
- School of Pharmaceutical Engineering and Life Science
- Changzhou University
- Changzhou, China
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18
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Li ZJ, Yao J, Tao Q, Jiang L, Lu TB. Enantioselective Recognition and Separation of Racemic 1-Phenylethanol by a Pair of 2D Chiral Coordination Polymers. Inorg Chem 2013; 52:11694-6. [DOI: 10.1021/ic4021367] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zi-Jian Li
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Jia Yao
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Qian Tao
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Long Jiang
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Tong-Bu Lu
- MOE Key Laboratory of Bioinorganic
and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials
and Technologies, and School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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19
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Pereira A, Martín C, Maya C, Belderrain TR, Pérez PJ. An Effective Dual Copper- and Sulfide-Catalytic System for the Epoxidation of Aldehydes with Phenyldiazomethane. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300606] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Illa O, Namutebi M, Saha C, Ostovar M, Chen CC, Haddow MF, Nocquet-Thibault S, Lusi M, McGarrigle EM, Aggarwal VK. Practical and highly selective sulfur ylide-mediated asymmetric epoxidations and aziridinations using a cheap and readily available chiral sulfide: extensive studies to map out scope, limitations, and rationalization of diastereo- and enantioselectivities. J Am Chem Soc 2013; 135:11951-66. [PMID: 23902598 DOI: 10.1021/ja405073w] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The chiral sulfide, isothiocineole, has been synthesized in one step from elemental sulfur, γ-terpinene, and limonene in 61% yield. A mechanism involving radical intermediates for this reaction is proposed based on experimental evidence. The application of isothiocineole to the asymmetric epoxidation of aldehydes and the aziridination of imines is described. Excellent enantioselectivities and diastereoselectivities have been obtained over a wide range of aromatic, aliphatic, and α,β-unsaturated aldehydes using simple protocols. In aziridinations, excellent enantioselectivities and good diastereoselectivities were obtained for a wide range of imines. Mechanistic models have been put forward to rationalize the high selectivities observed, which should enable the sulfide to be used with confidence in synthesis. In epoxidations, the degree of reversibility in betaine formation dominates both the diastereoselectivity and the enantioselectivity. Appropriate tuning of reaction conditions based on understanding the reaction mechanism enables high selectivities to be obtained in most cases. In aziridinations, betaine formation is nonreversible with semistabilized ylides and diastereoselectivities are determined in the betaine forming step and are more variable as a result.
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Affiliation(s)
- Ona Illa
- School of Chemistry, University of Bristol, Cantock's Close BS8 1TS, United Kingdom
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21
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Wu HY, Chang CW, Chein RJ. Enantioselective synthesis of (thiolan-2-yl)diphenylmethanol and its application in asymmetric, catalytic sulfur ylide-mediated epoxidation. J Org Chem 2013; 78:5788-93. [PMID: 23638685 DOI: 10.1021/jo400648f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work describes an expeditious and efficient preparation of enantiopure (thiolan-2-yl)diphenylmethanol (2) featuring a double nucleophilic substitution and Shi epoxidation as key steps. One of the applications of its benzyl ether derivative to asymmetric sulfur ylide-mediated epoxidation with up to 92% ee (14 examples) was also demonstrated herein.
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Affiliation(s)
- Hsin-Yi Wu
- Department of Chemistry, National Central University, Taoyuan, Taiwan 32001
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22
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Sarabia F, Vivar-García C, García-Castro M, García-Ruiz C, Martín-Gálvez F, Sánchez-Ruiz A, Chammaa S. A Highly Stereoselective Synthesis of Glycidic Amides Based on a New Class of Chiral Sulfonium Salts: Applications in Asymmetric Synthesis. Chemistry 2012; 18:15190-201. [DOI: 10.1002/chem.201201332] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 08/31/2012] [Indexed: 11/12/2022]
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Synthesis of Indoles through Highly Efficient Cascade Reactions of Sulfur Ylides and N-(ortho-Chloromethyl)aryl Amides. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203657] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Yang QQ, Xiao C, Lu LQ, An J, Tan F, Li BJ, Xiao WJ. Synthesis of Indoles through Highly Efficient Cascade Reactions of Sulfur Ylides and N-(ortho-Chloromethyl)aryl Amides. Angew Chem Int Ed Engl 2012; 51:9137-40. [DOI: 10.1002/anie.201203657] [Citation(s) in RCA: 120] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Indexed: 11/09/2022]
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25
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Knoppe S, Dass A, Bürgi T. Strong non-linear effects in the chiroptical properties of the ligand-exchanged Au38 and Au40 clusters. NANOSCALE 2012; 4:4211-6. [PMID: 22653001 DOI: 10.1039/c2nr30498h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ligand exchange reactions on size-selected Au(38)(2-PET)(24) and Au(40)(2-PET)(24) clusters (2-PET: 2-phenylethylthiol) with mono- and bi-dentate chiral thiols were performed. The reactions were monitored with MALDI mass spectrometry and the arising chiroptical properties were compared to the number of incorporated chiral ligands. Only a small fraction of chiral ligands is needed to induce significant optical activity to the clusters. The use of bidentate 1,1'-binaphthyl-2,2'-dithiol (BINAS) leads to slow exchange, but the optical activity measured is strong. Moreover, a non-linear behaviour between optical activity and the number of chiral ligands is found in the BINAS case for both Au(38) and Au(40), which may indicate different exchange rates of enantiopure BINAS with the enantiomers of inherently chiral (but racemic) clusters. This is ascribed to effects arising from the bidentate nature of BINAS. In contrast, the use of monodentate camphor-10-thiol (CamSH) leads to comparably fast exchange on both clusters. The arising optical activity is weak. This is the first study where chiroptical effects are directly correlated with the composition of the ligand shell.
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Affiliation(s)
- Stefan Knoppe
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
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26
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Knoppe S, Kothalawala N, Jupally VR, Dass A, Bürgi T. Ligand dependence of the synthetic approach and chiroptical properties of a magic cluster protected with a bicyclic chiral thiolate. Chem Commun (Camb) 2012; 48:4630-2. [DOI: 10.1039/c2cc00056c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Juaristi E, Bandala Y. Anomeric Effect in Saturated Heterocyclic Ring Systems. ADVANCES IN HETEROCYCLIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-396530-1.00002-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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28
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Appel R, Mayr H. Quantification of the Electrophilic Reactivities of Aldehydes, Imines, and Enones. J Am Chem Soc 2011; 133:8240-51. [DOI: 10.1021/ja200820m] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roland Appel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany
| | - Herbert Mayr
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany
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29
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Dyachenko VD, Karpov EN. Aliphatic aldehydes in the synthesis of carbo- and heterocycles: Part II. Synthesis of six- and seven-membered rings, bicyclic compounds, and macrocycles. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s1070428011010015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Liu CR, Zhu BH, Zheng JC, Sun XL, Xie Z, Tang Y. Highly diastereroselective synthesis of dihydrofurans and dihydropyrroles viapyridine catalyzed formal [4+1] annulation. Chem Commun (Camb) 2011; 47:1342-4. [DOI: 10.1039/c0cc02347g] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Namutebi M, McGarrigle EM, Aggarwal VK. Ring-Opening of NH-Aziridines with Thiols in Ionic Liquids: Application to the Synthesis of Aminosulfide Catalysts for Asymmetric Epoxidation of Aldehydes. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426501003773787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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32
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Li J, Hu F, Xie XK, Liu F, Huang ZZ. Synthesis of new functionalized chiral ionic liquid and its organocatalytic asymmetric epoxidation in water. CATAL COMMUN 2009. [DOI: 10.1016/j.catcom.2009.10.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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33
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Lu LQ, Li F, An J, Zhang JJ, An XL, Hua QL, Xiao WJ. Construction of Fused Heterocyclic Architectures by Formal [4+1]/[3+2] Cycloaddition Cascade of Sulfur Ylides and Nitroolefins. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904766] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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34
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Lu LQ, Li F, An J, Zhang JJ, An XL, Hua QL, Xiao WJ. Construction of Fused Heterocyclic Architectures by Formal [4+1]/[3+2] Cycloaddition Cascade of Sulfur Ylides and Nitroolefins. Angew Chem Int Ed Engl 2009; 48:9542-5. [DOI: 10.1002/anie.200904766] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Gui Y, Li J, Guo CS, Li XL, Lu ZF, Huang ZZ. A New Chiral Organosulfur Catalyst for Highly Stereoselective Synthesis of Epoxides. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800453] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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McGarrigle EM, Myers EL, Illa O, Shaw MA, Riches SL, Aggarwal VK. Chalcogenides as Organocatalysts. Chem Rev 2007; 107:5841-83. [PMID: 18072810 DOI: 10.1021/cr068402y] [Citation(s) in RCA: 353] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eoghan M. McGarrigle
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Eddie L. Myers
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Ona Illa
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Michael A. Shaw
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Samantha L. Riches
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
| | - Varinder K. Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, United Kingdom
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37
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38
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Reaction of selenofenchone with propiolic acid: first instance of Wagner–Meerwein rearrangement in selone. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.120] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Sonawane RP, Mück-Lichtenfeld C, Fröhlich R, Bergander K, Hoppe D. Highly diastereoselective lithiation and substitution of an (S)-prolinyl thiocarbamate via sterically homogeneous lithio(thiocarbamate): synthesis of enantiomerically pure prolinethiols. Chemistry 2007; 13:6419-29. [PMID: 17503415 DOI: 10.1002/chem.200601853] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Highly diastereoselective lithiation-substitution reactions of an (S)-proline derived S-alkyl thiocarbamate was accomplished. The configuration of the predominant alkyllithium species and the stereochemical course of the electrophilic substitution reactions are deduced by a combination of X-ray crystal structure analysis, NMR spectroscopic studies, deuteration/dedeuteration experiments, and quantum chemical calculations. The lithium intermediate (S,S)-9 was found to be kinetically and thermodynamically favoured, whereas (S,R)-9 rapidly epimerizes.
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Affiliation(s)
- Ravindra P Sonawane
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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40
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Blot V, Brièr JF, Davoust M, Minière S, Reboul V, Metzner P. Developments of Asymmetric Synthesis Mediated by Chiral Sulfur Reagents. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/10426500590910747] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Virginie Blot
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
| | - Jean-François Brièr
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
| | - Marion Davoust
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
| | - Stéphanie Minière
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
| | - Vincent Reboul
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
| | - Patrick Metzner
- a Laboratoire de Chimie Moléculaire et Thio-organique (UMR CNRS 6507), ENSICAEN , Caen, France
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41
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Zhu S, Xing C, Pang W, Zhu S. Rh2(OAc)4-catalyzed formation of trans-alkenes from the reaction of aldehydes with perfluorophenyl diazomethane through tellurium ylide. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.06.065] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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42
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43
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Aggarwal VK, Grange E. Asymmetric Sulfonium Ylide Mediated Cyclopropanation: Stereocontrolled Synthesis of (+)-LY354740. Chemistry 2006; 12:568-75. [PMID: 16187367 DOI: 10.1002/chem.200500693] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The reaction of ester-stabilized sulfonium ylides with cyclopentenone to give (+)-5 ((1S,5R,6S)-ethyl 2-oxobicyclo[3.1.0]hexane-6-carboxylate), an important precursor to the pharmacologically important compound (+)-LY354740, has been studied using chiral sulfides operating in both catalytic (sulfide, Cu(acac)2, ethyl diazoacetate, 60 degrees C) and stoichiometric modes (sulfonium salt, base, room temperature). It was found that the reaction conditions employed had a major influence over both diastereo- and enantioselectivity. Under catalytic conditions, good enantioselectivity with low diastereoselectivity was observed, but under stoichiometric conditions low enantioselectivity with high diastereoselectivity was observed. When the stoichiometric reactions were conducted at high dilution, diastereoselectivity was reduced. This indicated that base-mediated betaine equilibration was occurring (which is slow relative to ring closure at high dilution). Based on this model, conditions for achieving high enantioselectivity were established as follows: use of a preformed ylide, absence of base, hindered ester (to reduce ylide-mediated betaine equilibration), and low concentration. Under these conditions high enantioselectivity (95 % ee) was achieved, albeit with low diastereocontrol. Our model for selectivity has been applied to other sulfonium ylide mediated cyclopropanation reactions and successfully accounts for the diastereoselectivity observed in all such reported reactions to date.
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Affiliation(s)
- Varinder K Aggarwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK.
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44
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Xia QH, Ge HQ, Ye CP, Liu ZM, Su KX. Advances in homogeneous and heterogeneous catalytic asymmetric epoxidation. Chem Rev 2005; 105:1603-62. [PMID: 15884785 DOI: 10.1021/cr0406458] [Citation(s) in RCA: 719] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Q-H Xia
- Laboratory for Advanced Materials and New Catalysis, School of Chemistry and Materials Science, Hubei University, Wuhan 430062, China.
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45
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Fulton JR, Aggarwal VK, de Vicente J. The Use of Tosylhydrazone Salts as a Safe Alternative for Handling Diazo Compounds and Their Applications in Organic Synthesis. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400700] [Citation(s) in RCA: 322] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- J. Robin Fulton
- Department of Chemistry, University of Sussex Falmer, Brighton, BN1 9QJ, UK
| | | | - Javier de Vicente
- School of Chemistry, Bristol University, Cantock’s Close, Bristol, BS8 1TS, UK
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46
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Silva MA, Bellenie BR, Goodman JM. Theoretical study on the selectivity of asymmetric sulfur ylide epoxidation reaction. Org Lett 2005; 6:2559-62. [PMID: 15255690 DOI: 10.1021/ol0491641] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text] We report the first theoretical studies on the asymmetric sulfonium ylide epoxidation reaction using a chiral sulfide that successfully reproduces the experimentally determined high enantiomeric excess. Calculations at the DFT level suggest that the transition states for the addition of the sulfonium ylide to benzaldehyde have energies which account for the observed enantioselectivity.
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Affiliation(s)
- María A Silva
- Unilever Centre for Molecular Science Informatics, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
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47
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48
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Catalytic ferrocenyl sulfides for the asymmetric transformation of aldehydes into epoxides. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.08.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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49
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Aggarwal VK, Winn CL. Catalytic, asymmetric sulfur ylide-mediated epoxidation of carbonyl compounds: scope, selectivity, and applications in synthesis. Acc Chem Res 2004; 37:611-20. [PMID: 15311960 DOI: 10.1021/ar030045f] [Citation(s) in RCA: 421] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of sulfur ylides with carbonyl compounds to give epoxides is an important synthetic method. This Account charts the recent advances in rendering this process both asymmetric and catalytic. Two catalytic methods have been developed: the first involving the reaction of a sulfide with an alkyl halide in the presence of a base and aldehyde and the second involving the reaction of a sulfide with a diazo compound or diazo precursor in the presence of a metal catalyst and aldehyde. These catalytic methods coupled with suitable chiral sulfides provide a new catalytic asymmetric epoxidation process for the preparation of epoxides. The scope of the two catalytic processes is discussed together with the factors that influence both relative and absolute stereochemistry. The application of these methods in target-orientated synthesis is also reviewed.
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Affiliation(s)
- Varinder K Aggarwal
- School of Chemistry, Cantock's Close, University of Bristol, Bristol BS8 1TS, U.K
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50
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Aggarwal VK, Charmant J, Dudin L, Porcelloni M, Richardson J. Effect of sulfide structure on enantioselectivity in catalytic asymmetric epoxidation of aldehydes: mechanistic insights and implications. Proc Natl Acad Sci U S A 2004; 101:5467-71. [PMID: 15034181 PMCID: PMC397406 DOI: 10.1073/pnas.0307559101] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Bridged bicyclic sulfide 1 was originally found to provide high levels of asymmetric induction in sulfur ylide-mediated epoxidations. This sulfide possesses chirality in the [2.2.1] thioether moiety and the [2.2.1] camphor-derived carbocyclic moiety. To determine whether the optimal sulfide had been used, a diastereomer of sulfide 1 in which the stereochemistry of the [2.2.1] carbocycle was reversed (sulfide 5) was prepared and studied as an epoxidation catalyst. This diastereomer gave considerably lower levels of asymmetric induction than the original sulfide 1. From computational and x-ray studies it was found that sulfide 5 gave rise to a more hindered ylide, which reacted more reversibly with aldehydes leading to lower enantioselectivity. Conditions that reduced reversibility were also tested and high enantioselectivities were returned for sulfide 5 (similar to sulfide 1). The implications for the synthesis of chiral sulfides for asymmetric epoxidations are discussed.
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Affiliation(s)
- Varinder K Aggarwal
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom.
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