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Li B, Xing D, Li X, Chang S, Jiang H, Huang L. Chemo-divergent Cyano Group Migration: Involving Elimination and Substitution of the Key α-Thianthrenium Cyano Species. Org Lett 2023; 25:6633-6637. [PMID: 37672391 DOI: 10.1021/acs.orglett.3c02396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Herein, we report a light-driven, radical-type cyano migration in the absence of a photocatalyst, enabling a chemo-divergent synthesis of (Z)-alkenyl nitriles and ketones. Trifluoromethyl thianthrenium salt (TT-CF3+OTf-) plays multiple roles: (a) absorbing light to generate trifluoromethyl radicals to initiate the reaction and (b) forming α-thianthrenium cyano species by in situ capture of TT• +. (Z)-Alkenyl nitriles were formed through the elimination of thianthrenium salts, and aryl ketones were obtained via the nucleophilic substitution of thianthrenium salts.
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Affiliation(s)
- Bo Li
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China
| | - Donghui Xing
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China
| | - Xiaohong Li
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China
| | - Shunqin Chang
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, People's Republic of China
| | - Liangbin Huang
- State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, People's Republic of China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, People's Republic of China
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2
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Chen K, Zeng Q, Xie L, Xue Z, Wang J, Xu Y. Functional-group translocation of cyano groups by reversible C-H sampling. Nature 2023; 620:1007-1012. [PMID: 37364765 DOI: 10.1038/s41586-023-06347-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 06/20/2023] [Indexed: 06/28/2023]
Abstract
Chemical transformations that introduce, remove or manipulate functional groups are ubiquitous in synthetic chemistry1. Unlike conventional functional-group interconversion reactions that swap one functionality for another, transformations that alter solely the location of functional groups are far less explored. Here, by photocatalytic, reversible C-H sampling, we report a functional-group translocation reaction of cyano (CN) groups in common nitriles, allowing for the direct positional exchange between a CN group and an unactivated C-H bond. The reaction shows high fidelity for 1,4-CN translocation, frequently contrary to inherent site selectivity in conventional C-H functionalizations. We also report the direct transannular CN translocation of cyclic systems, providing access to valuable structures that are non-trivial to obtain by other methods. Making use of the synthetic versatility of CN and a key CN translocation step, we showcase concise syntheses of building blocks of bioactive molecules. Furthermore, the combination of C-H cyanation and CN translocation allows access to unconventional C-H derivatives. Overall, the reported reaction represents a way to achieve site-selective C-H transformation reactions without requiring a site-selective C-H cleavage step.
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Affiliation(s)
- Ken Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Qingrui Zeng
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Longhuan Xie
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Zisheng Xue
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Jianbo Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Yan Xu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China.
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3
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Guo F, Wang H, Ye X, Tan CH. Advanced Synthesis Using Photocatalysis Involved Dual Catalytic System. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fenfen Guo
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Hong Wang
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Xinyi Ye
- Zhejiang University of Technology College of Pharmaceutical Science 18 Chaowang Road 310014 Hangzhou CHINA
| | - Choon-Hong Tan
- Nanyang Technological University School of Physical and Mathematical Sciences SINGAPORE
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4
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Wu X, Ma Z, Feng T, Zhu C. Radical-mediated rearrangements: past, present, and future. Chem Soc Rev 2021; 50:11577-11613. [PMID: 34661216 DOI: 10.1039/d1cs00529d] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Rearrangement reactions, one of the most significant transformations in organic chemistry, play an irreplaceable role in improving synthetic efficiency and molecular complexity. Concomitant cleavage and reconstruction of chemical bonds can display the great artistry and the glamour of synthetic chemistry. Over the past century, ionic rearrangement reactions, in particular those involving cationic pathways, have represented most of the research. Alongside the renaissance of radical chemistry, radical-mediated rearrangements have recently seen a rapid increase of attention from the chemical community. Many new radical rearrangements that extensively reveal the migratory behaviour of functional groups have been unveiled in the last decade. This Review provides a comprehensive perspective on the area from the past to present achievements, and brings up the prospects that may inspire colleagues to develop more useful synthetic tools based on radical rearrangements.
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Affiliation(s)
- Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Zhigang Ma
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Tingting Feng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China.
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, China. .,Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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5
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Sun K, Lv QY, Lin YW, Yu B, He WM. Nitriles as radical acceptors in radical cascade reactions. Org Chem Front 2021. [DOI: 10.1039/d0qo01058h] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The application of the cyano group as a radical acceptor in the cascade reactions for the construction of various important heterocycles and carbocycles was summarized.
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Affiliation(s)
- Kai Sun
- Green Catalysis Center
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Qi-Yan Lv
- Green Catalysis Center
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Ying-Wu Lin
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang
- China
| | - Bing Yu
- Green Catalysis Center
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
| | - Wei-Min He
- Department of Chemistry
- Hunan University of Science and Engineering
- Yongzhou 425100
- China
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
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Weweler J, Younas SL, Streuff J. Titanium(III)-Catalyzed Reductive Decyanation of Geminal Dinitriles by a Non-Free-Radical Mechanism. Angew Chem Int Ed Engl 2019; 58:17700-17703. [PMID: 31513329 PMCID: PMC6899653 DOI: 10.1002/anie.201908372] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/19/2019] [Indexed: 01/14/2023]
Abstract
A titanium-catalyzed mono-decyanation of geminal dinitriles is reported. The reaction proceeds under mild conditions, tolerates numerous functional groups, and can be applied to quaternary malononitriles. A corresponding desulfonylation is demonstrated as well. Mechanistic experiments support a catalyst-controlled cleavage without the formation of free radicals, which is in sharp contrast to traditional stoichiometric radical decyanations. The involvement of two TiIII species in the C-C cleavage is proposed, and the beneficial role of added ZnCl2 and 2,4,6-collidine hydrochloride is investigated.
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Affiliation(s)
- Jens Weweler
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
| | - Sara L. Younas
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
| | - Jan Streuff
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
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7
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Weweler J, Younas SL, Streuff J. Titan(III)‐katalysierte, reduktive Decyanierung geminaler Dinitrile ohne freie Radikalintermediate. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908372] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jens Weweler
- Institut für Organische ChemieAlbert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Deutschland
| | - Sara L. Younas
- Institut für Organische ChemieAlbert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Deutschland
| | - Jan Streuff
- Institut für Organische ChemieAlbert-Ludwigs-Universität Freiburg Albertstraße 21 79104 Freiburg im Breisgau Deutschland
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8
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Betori RC, McDonald BR, Scheidt KA. Reductive annulations of arylidene malonates with unsaturated electrophiles using photoredox/Lewis acid cooperative catalysis. Chem Sci 2019; 10:3353-3359. [PMID: 30996923 PMCID: PMC6430011 DOI: 10.1039/c9sc00302a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 02/03/2019] [Indexed: 01/18/2023] Open
Abstract
A cooperative Lewis acid/photocatalytic reduction of salicylaldehyde-derived arylidene malonates provides access to a versatile, stabilized radical anion enolate. Using these unusual umpolung operators, we have developed a novel route to access densely functionalized carbo- and heterocycles through a radical annulation addition pathway.
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Affiliation(s)
- Rick C Betori
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
| | - Benjamin R McDonald
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
| | - Karl A Scheidt
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
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9
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Kawamoto T, Shimaya Y, Curran DP, Kamimura A. Tris(trimethylsilyl)silane-mediated Reductive Decyanation and Cyano Transfer Reactions of Malononitriles. CHEM LETT 2018. [DOI: 10.1246/cl.171231] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Takuji Kawamoto
- Department of Applied Chemistry, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Yudai Shimaya
- Department of Applied Chemistry, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Akio Kamimura
- Department of Applied Chemistry, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
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10
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Synthesis of Functionalized Nitriles by Microwave-Promoted Fragmentations of Cyclic Iminyl Radicals. Chemistry 2017; 24:594-598. [DOI: 10.1002/chem.201705728] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Indexed: 12/16/2022]
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11
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907237] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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12
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Larraufie MH, Ollivier C, Fensterbank L, Malacria M, Lacôte E. Radical Synthesis of Guanidines fromN-Acyl Cyanamides. Angew Chem Int Ed Engl 2010; 49:2178-81. [DOI: 10.1002/anie.200907237] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Demir AS, Emrullahoğlu M, Buran K. Gold(i)/Zn(ii) catalyzed tandem hydroamination/annulation reaction of 4-yne-nitriles. Chem Commun (Camb) 2010; 46:8032-4. [DOI: 10.1039/c0cc02357d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Onozaki Y, Kurono N, Senboku H, Tokuda M, Orito K. Synthesis of Isoindolobenzazepine Alkaloids Based on Radical Reactions or Pd(0)-Catalyzed Reactions. J Org Chem 2009; 74:5486-95. [DOI: 10.1021/jo900311g] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Onozaki
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Nobuhito Kurono
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Hisanori Senboku
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Masao Tokuda
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - Kazuhiko Orito
- Laboratory of Organic Synthesis, Division of Molecular Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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15
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16
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Byers JH, DeWitt A, Nasveschuk CG, Swigor JE. Tandem radical-electrophilic annulations to pyrrole. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.07.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Kitagawa O, Miyaji S, Sakuma C, Taguchi T. Stereoselective Iodine Atom Transfer [3 + 2] Cycloaddition Reaction with Alkenes Using Unsymmetrical Allylated Active Methine Radicals. J Org Chem 2004; 69:2607-10. [PMID: 15049671 DOI: 10.1021/jo035771a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Treatment of 1-diethylphosphonyl- or 1-phenylsulfonyl-2-(iodomethyl)cyclopropane-1-carboxylate with Et(3)B leads to an unsymmetrical allylated active methine radical species that gives functionalized cyclopentane derivatives with high stereoselectivity through iodine atom transfer [3 + 2] cycloaddition reaction with alkenes.
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Affiliation(s)
- Osamu Kitagawa
- Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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18
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19
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Triethylborane as an efficient promoter for palladium-catalyzed allylation of active methylene compounds with allyl alcohols. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)01234-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Kitagawa O, Yamada Y, Sugawara A, Taguchi T. Radical cascade reaction with 1,4-dienes and 1,4-enynes using 2-(iodomethyl)cyclopropane-1,1-dicarboxylate as a homoallyl radical precursor: one-step synthesis of bicyclo[3.3.0]octane derivatives. Org Lett 2002; 4:1011-3. [PMID: 11893209 DOI: 10.1021/ol025583r] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Radical cascade reaction with various 1,4-dienes and 1,4-enynes using dimethyl 2-(iodomethyl)cyclopropane-1,1-dicarboxylate as a homoallyl radical precursor smoothly proceeds through an iodine atom transfer mechanism to give functionalized bicyclo[3.3.0]octane derivatives in good yields.
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Affiliation(s)
- Osamu Kitagawa
- Tokyo University of Pharmacy and Life Science, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Kitagawa O, Yamada Y, Fujiwara H, Taguchi T. Iodoaziridine Derivatives as Novel Azahomoallyl Radical Precursors for [3+2] Cycloaddition Reactions with Alkenes. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20011015)113:20<3983::aid-ange3983>3.0.co;2-r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Kitagawa O, Yamada Y, Fujiwara H, Taguchi T. Iodoaziridine Derivatives as Novel Azahomoallyl Radical Precursors for [3+2] Cycloaddition Reactions with Alkenes. Angew Chem Int Ed Engl 2001; 40:3865-3867. [PMID: 11668557 DOI: 10.1002/1521-3773(20011015)40:20<3865::aid-anie3865>3.0.co;2-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Osamu Kitagawa
- Tokyo University of Pharmacy and Life Science 1432-1 Horinouchi, Hachioji, Tokyo 192-0392 (Japan)
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23
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Choe SW, Jung ME. Preparation of various C-2 branched carbohydrates using intramolecular radical reactions. Carbohydr Res 2000; 329:731-44. [PMID: 11125815 DOI: 10.1016/s0008-6215(00)00246-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new and efficient method for the facile synthesis of C-2 branched carbohydrates has been developed using an intramolecular radical cyclization fragmentation reaction. The desired C-2 branched glucopyranosides were isolated in 40-84% yield. Additionally, an unexpected furanoside was obtained from a tributyltin iodide-promoted rearrangement of the radical intermediate. The C-2 formyl glycal was also isolated in good yield using tris(trimethylsilyl)silane (TTMSS) as the reducing agent. This method was extended to synthesize a beta C-2 branched glucopyranoside, a C-2 branched galactoside and a C-2 cyano glucopyranoside.
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Affiliation(s)
- S W Choe
- Department of Chemistry and Biochemistry, Loyola Marymount University, Los Angeles, CA 90045-8225, USA.
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24
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25
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Byers JH, Campbell JE, Knapp FH, Thissell JG. Radical aromatic substitution via atom-transfer addition. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00304-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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27
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Curran DP, Ko SB. Additions of electrophilic radicals to electron rich alkenes by the atom transfer method. Surmounting potentially reversible radical atom transfer reactions by irreversible ionic reactions. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)01405-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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28
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Kita Y, Gotanda K, Murata K, Suemura M, Sano A, Yamaguchi T, Oka M, Matsugi M. Practical Radical Additions under Mild Conditions Using 2,2‘-Azobis(2,4-dimethyl-4-methoxyvaleronitrile) [V-70] as an Initiator. Org Process Res Dev 1998. [DOI: 10.1021/op970059z] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yasuyuki Kita
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Kentoku Gotanda
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Kenji Murata
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Miki Suemura
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Atsunori Sano
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Takahiro Yamaguchi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Masahisa Oka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
| | - Masato Matsugi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6, Yamada-oka, Suita, Osaka 565, Japan, and Tokyo Research Laboratories, Wako Pure Chemical Industries, Ltd., 1633, Matoba, Kawagoe, Saitama 350-11, Japan
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29
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Chang CW, Ting PC, Lin YC, Lee GH, Wang Y. Synthesis of ruthenium vinylidene complexes with dppe ligand and their cyclopropenation reaction. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(97)00629-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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30
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Rychnovsky SD, Swenson SS. Tandem radical nitrile transfer-cyclization reactions of 1,3-dioxane-4-nitriles: Synthesis of spirocyclic systems. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)01030-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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31
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Curran DP, Diederichsen U, Palovich M. Radical Cyclizations of Acylgermanes. New Reagent Equivalents of the Carbonyl Radical Acceptor Synthon. J Am Chem Soc 1997. [DOI: 10.1021/ja970219m] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dennis P. Curran
- Contribution from the Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260
| | - Ulf Diederichsen
- Contribution from the Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260
| | - Michael Palovich
- Contribution from the Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260
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Kita Y, Sano A, Yamaguchi T, Oka M, Gotanda K, Matsugi M. Additions of malononitrile radicals to alkenes under mild conditions using 2,2′-azobis-(2,4-dimethyl-4-methoxyvaleronitrile) (V-70) as an initiator. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)00700-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Affiliation(s)
- Pei-Chen Ting
- Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Ying-Chih Lin
- Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Gene-Hsiang Lee
- Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Ming-Chu Cheng
- Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
| | - Yu Wang
- Contribution from the Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
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Vionnet JP, Schenk K, Renaud P. Regioselective Radical Additions to 7-Oxabicyclo[2.2.1]hept-5-en-2-one. Helv Chim Acta 1993. [DOI: 10.1002/hlca.19930760708] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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