1
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Mando M, Grellepois F, Blanc A, Hénon E, Riguet E. Toward Efficient and Stereoselective Aromatic and Dearomative Cope Rearrangements: Experimental and Theoretical Investigations of α-Allyl-α'-Aromatic γ-Lactone Derivatives. Chemistry 2024; 30:e202304138. [PMID: 38284279 DOI: 10.1002/chem.202304138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 01/30/2024]
Abstract
The aromatic Cope rearrangement is an elusive transformation that has been the subject of a limited number of investigations compared to those seemingly close analogues, namely the Cope and aromatic Claisen rearrangement. Herein we report our investigations inspired by moderate success observed in the course of pioneering works. By careful experimental and theoretical investigations, we demonstrate that key substitutions on 1,5-hexadiene scaffold allow fruitful transformations. Especially, efficient functionalisation of the heteroaromatic rings results from the aromatic Cope rearrangement, while highly stereoselective interrupted aromatic Cope rearrangements highlight the formation of chiral compounds through a dearomative process.
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Affiliation(s)
- Morgane Mando
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Fabienne Grellepois
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Aurélien Blanc
- Université de Strasbourg, CNRS, Institut de Chimie, UMR 7177, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg, France
| | - Eric Hénon
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Emmanuel Riguet
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
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2
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Petruncio G, Shellnutt Z, Elahi-Mohassel S, Alishetty S, Paige M. Skipped dienes in natural product synthesis. Nat Prod Rep 2021; 38:2187-2213. [PMID: 34913051 DOI: 10.1039/d1np00012h] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Covering: 2000-2020The 1,4-diene motif, also known as a skipped diene, is widespread across various classes of natural products including alkaloids, fatty acids, terpenoids, and polyketides as part of either the finalized structure or a biosynthetic intermediate. The prevalence of this nonconjugated diene system in nature has resulted in numerous encounters in the total synthesis literature. However, skipped dienes have not been extensively reviewed, which could be attributed to overshadowing by the more recognized 1,3-diene system. In this review, we aim to highlight the relevance of skipped dienes in natural products through the lens of total synthesis. Subjects that will be covered include nomenclature, structural properties, prevalence in natural products, synthetic strategies and the future direction of the field.
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Affiliation(s)
- Greg Petruncio
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Zachary Shellnutt
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Synah Elahi-Mohassel
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
| | - Suman Alishetty
- Department of Bioengineering, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA
| | - Mikell Paige
- Department of Chemistry & Biochemistry, George Mason University, 10920 George Mason Circle, Manassas, Virginia 20110, USA.
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3
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Yu H, Yu B, Zhang H, Huang H. Palladium-Catalyzed Aminomethylation and Cyclization of Enynol to O-Heterocycle Confined 1,3-Dienes. Org Lett 2021; 23:3891-3896. [PMID: 33970643 DOI: 10.1021/acs.orglett.1c01019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The rational tuning of the electrophilicity of the allylpalladium intermediates enables the regioselectively intramolecular 1,2-addition of enynol in the presence of aminal. This aminomethylation and cyclization reaction via C-N bond activation and intramolecular nucleophilic addition provides a rare example for the synthesis of O-containing heterocycle-confined 1,3-dienes, which is of synthetic potential for further derivatization. The method possesses broad substrate generality as well as functional group compatibility and efficiently affords a wide range of desired products with 5-, 6-, and 8-membered O-containing heterocycles with various functional groups.
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Affiliation(s)
- Houjian Yu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Bangkui Yu
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Haocheng Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hanmin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, P. R. China
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4
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A‐Type Alkaloids: Divergent Total Syntheses of (−)‐Daphenylline and (−)‐Himalensine A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Fayang G. Qiu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
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5
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Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A-Type Alkaloids: Divergent Total Syntheses of (-)-Daphenylline and (-)-Himalensine A. Angew Chem Int Ed Engl 2021; 60:9439-9443. [PMID: 33569888 DOI: 10.1002/anie.202016212] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/31/2021] [Indexed: 12/16/2022]
Abstract
An efficient general strategy for the synthesis of the Daphniphyllum alkaloids via the rapid construction of a common core intermediate has been established, based on which a divergent total synthesis of (-)-daphenylline and (-)-himalensine A has been accomplished in 16 and 19 steps, respectively. The present work features an enantioselective Mg(ClO4 )2 -catalyzed intramolecular amidocyclization to construct the aza-bridged core structure; a Cu-catalyzed intramolecular cyclopropanation and subsequent phosphine-catalyzed Cope-type rearrangement to furnish the himalensine A scaffold; and a one-pot Diels-Alder/aromatization method to assemble the aromatic skeleton of daphenylline.
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Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fayang G Qiu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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6
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Abstract
Reviewed herein is the aromatic Cope rearrangement, a Cope rearrangement where one (or both) of the alkenes of the 1,5-diene are part of a greater aromatic system. While the Cope rearrangement of 1,5-dienes has seen wide utility, variation, and application in chemical synthesis, the aromatic Cope rearrangement, comparatively, has not. This review summarizes the ∼40 papers dating back to 1956 on this topic and is divided into the following sections: (1) introduction, including kinetic and thermodynamic challenges of the aromatic Cope rearrangement, and (2) key substrate features, of which there are four general types: (i) α-allyl-α-aryl malonates (and related substrates), (ii) 1-aryl-2-vinylcyclopropanes, and (iii) anion-accelerated aromatic oxy-Cope substrates, and (iv) the concept of synchronized aromaticity. Ultimately, we hope this review will draw attention to a potentially valuable transformation for arene functionalization that warrants further studies and development.
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Affiliation(s)
- Breanna M Tomiczek
- Department of Chemistry, University of Florida, PO Box 117200, Gainesville, FL, USA.
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7
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Ma R, Gung BW. Transition states of the gold-catalyzed transannular [4+3] cycloaddition reactions: A computational study. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130840] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Zhu X, Wang Z, Hou B, Zhang H, Deng C, Ye L. Zinc‐Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2
H
‐Azepines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912534] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xin‐Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Ze‐Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Bo‐Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Hao‐Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry College of Sciences Nanjing Agricultural University Nanjing 210095 China
| | - Long‐Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China
- State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 China
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9
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Zhu XQ, Wang ZS, Hou BS, Zhang HW, Deng C, Ye LW. Zinc-Catalyzed Asymmetric Formal [4+3] Annulation of Isoxazoles with Enynol Ethers by 6π Electrocyclization: Stereoselective Access to 2H-Azepines. Angew Chem Int Ed Engl 2019; 59:1666-1673. [PMID: 31724314 DOI: 10.1002/anie.201912534] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/31/2019] [Indexed: 12/17/2022]
Abstract
6π electrocyclization has attracted interest in organic synthesis because of its high stereospecificity and atom economy in the construction of versatile 5-7-membered cycles. However, examples of asymmetric 6π electrocyclization are quite scarce, and have to rely on the use of chiral organocatalysts, and been limited to pentadienyl-anion- and triene-type 6π electrocyclizations. Described herein is a zinc-catalyzed formal [4+3] annulation of isoxazoles with 3-en-1-ynol ethers via 6π electrocyclization, leading to the site-selective synthesis of functionalized 2H-azepines and 4H-azepines in good to excellent yields with broad substrate scope. Moreover, this strategy has also been used to produce chiral 2H-azepines with high enantioselectivities (up to 97:3 e.r.). This protocol not only is the first asymmetric heptatrienyl-cation-type 6π electrocyclization, but also is the first asymmetric reaction of isoxazoles with alkynes and the first asymmetric catalysis based on ynol ethers.
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Affiliation(s)
- Xin-Qi Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ze-Shu Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Bo-Shang Hou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hao-Wen Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao Deng
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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10
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Davies HML. Finding Opportunities from Surprises and Failures. Development of Rhodium-Stabilized Donor/Acceptor Carbenes and Their Application to Catalyst-Controlled C-H Functionalization. J Org Chem 2019; 84:12722-12745. [PMID: 31525891 PMCID: PMC7232105 DOI: 10.1021/acs.joc.9b02428] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Catalyst-controlled C-H functionalization by means of the C-H insertion chemistry of rhodium carbenes has become a powerful synthetic method. The key requirements for the development of this chemistry are donor/acceptor carbenes and the chiral dirhodium tetracarboxylate catalysts. This perspective will describe the stages involved in developing this chemistry and illustrate the scope of the donor/acceptor carbene C-H functionalization.
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Affiliation(s)
- Huw M L Davies
- Department of Chemistry , Emory University , 1515 Dickey Drive , Atlanta , Georgia 30322 , Unites States
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11
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Chen H, Zhao S, Cheng S, Dai X, Xu X, Yuan W, Zhang X. Synthesis of Novel Pterocarpen Analogues
via
[3 + 2] Coupling‐Elimination Cascade of α,α‐Dicyanoolefins with Quinone Monoimines. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3543] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hui Chen
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Sihan Zhao
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Shaobing Cheng
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xingjie Dai
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiaoying Xu
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
| | - Weicheng Yuan
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
| | - Xiaomei Zhang
- Key Laboratory for Asymmetric Synthesis and Chirotechnology of Sichuan ProvinceChengdu Institute of Organic Chemistry, Chinese Academy of Sciences Chengdu 610041 China
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12
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Sommer H, Weissbrod T, Marek I. A Tandem Iridium-Catalyzed "Chain-Walking"/Cope Rearrangement Sequence. ACS Catal 2019; 9:2400-2406. [PMID: 32953237 PMCID: PMC7493306 DOI: 10.1021/acscatal.9b00118] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 01/30/2019] [Indexed: 12/17/2022]
Abstract
An iridium-catalyzed tandem olefin migration/Cope rearrangement of alkenyl ω-ene cyclopropanes is reported. By this means, a variety of complex annulenes are obtained as single diastereomers starting from cyclopropyl ester derived from simple 1,ω-dienes and alkenyldiazo compounds. Long-range olefin migration over up to 10 positions could be realized and coupled with an efficient Cope rearrangement to yield valuable scaffolds. Various functional groups are well-tolerated, giving rise to densely functionalized products. Furthermore, the present methodology could be successfully extended to yield bicyclic cycloheptenones starting from readily available alkenyl cyclopropanols via a Kulinkovich reaction.
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Affiliation(s)
- Heiko Sommer
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Tal Weissbrod
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion—Israel Institute of Technology, Technion City, Haifa, 32000, Israel
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13
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Xu G, Chen L, Sun J. Rhodium-Catalyzed Asymmetric Dearomative [4 + 3]-Cycloaddition of Vinylindoles with Vinyldiazoacetates: Access to Cyclohepta[b]indoles. Org Lett 2018; 20:3408-3412. [DOI: 10.1021/acs.orglett.8b01353] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Long Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
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14
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Yin Z, He Y, Chiu P. Application of (4+3) cycloaddition strategies in the synthesis of natural products. Chem Soc Rev 2018; 47:8881-8924. [DOI: 10.1039/c8cs00532j] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review summarizes the applications of (4+3) cycloadditions, both classical and formal, in the syntheses of natural products in the last two decades.
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Affiliation(s)
- Zengsheng Yin
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Yun He
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Pauline Chiu
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
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15
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Liu Y, Zhang G, Huang H. Ni-Catalyzed Dimerization and Arylation of Diarylacetylenes with Arylboronic Acids. Org Lett 2017; 19:6674-6677. [PMID: 29192790 DOI: 10.1021/acs.orglett.7b03398] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new, facile, and efficient protocol for the synthesis of polysubstituted conjugated 1,3-dienes through Ni-catalyzed tandem dimerization/cross-coupling reaction of diarylacetylenes and arylboronic acids in the presence of a catalytic amount of B2pin2 has been developed. A series of arynes and arylboronic acids with different substituents participated well in this catalytic system, affording a variety of useful conjugated 1,3-dienes.
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Affiliation(s)
- Yang Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, P. R. China.,University of Chinese Academy of Sciences , Beijing 100049, P. R. China
| | - Guoying Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, P. R. China
| | - Hanmin Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000, P. R. China.,Department of Chemistry, University of Science and Technology of China , Hefei 230026, P. R. China
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16
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Kwon K, Ham JS, Kim HY, Sampath V, Lee HY. A Formal Total Synthesis of (+)-Frondosin A. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kuktae Kwon
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Jin Su Ham
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Hyoun Young Kim
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Vasu Sampath
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
| | - Hee-Yoon Lee
- Department of Chemistry; Korea Advanced Institute of Science&Technology (KAIST); 291 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea
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17
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Marichev KO, Ramey JT, Arman H, Doyle MP. Highly Regio-, Diastereo-, and Enantioselective Rhodium-Catalyzed Intramolecular Cyclopropanation of (Z)-1,3-Dienyl Aryldiazoacetates. Org Lett 2017; 19:1306-1309. [DOI: 10.1021/acs.orglett.7b00119] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kostiantyn O. Marichev
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Justin T. Ramey
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Michael P. Doyle
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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18
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Huynh KQ, Seizert CA, Ozumerzifon TJ, Allegretti PA, Ferreira EM. Platinum-Catalyzed α,β-Unsaturated Carbene Formation in the Formal Syntheses of Frondosin B and Liphagal. Org Lett 2016; 19:294-297. [PMID: 27997203 DOI: 10.1021/acs.orglett.6b03682] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Formal syntheses of tetracyclic terpenoids frondosin B and liphagal are described. Both synthetic routes rely on the use of platinum-catalyzed α,β-unsaturated carbene formation for the key C-C bond forming transformations. The successful route toward frondosin B utilizes a formal (4 + 3) cycloaddition, while the liphagal synthesis features the vinylogous addition of an enol nucleophile as a key step. Both synthetic routes are discussed, revealing insights into structural requirements in the catalytic α,β-unsaturated carbene reaction manifold.
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Affiliation(s)
- Khoi Q Huynh
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Curtis A Seizert
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Tarik J Ozumerzifon
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Paul A Allegretti
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
| | - Eric M Ferreira
- Department of Chemistry, University of Georgia , Athens, Georgia 30602, United States
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19
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Orr D, Percy JM, Harrison ZA. A computational triage approach to the synthesis of novel difluorocyclopentenes and fluorinated cycloheptadienes using thermal rearrangements. Chem Sci 2016; 7:6369-6380. [PMID: 28451092 PMCID: PMC5355944 DOI: 10.1039/c6sc01289b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 06/15/2016] [Indexed: 11/21/2022] Open
Abstract
Electronic structure calculations have been used for the effective triage of substituent effects on difluorinated vinylcyclopropane precursors and their ability to undergo vinyl cyclopropane rearrangements (VCPR). Groups which effectively stabilised radicals, specifically heteroarenes, were found to result in the lowest energy barriers. Ten novel precursors were synthesised to test the accuracy of computational predictions; the most reactive species which contained heteroarenes underwent thermal rearrangements at room temperature to afford novel difluorocyclopentenes and fluorinated benzocycloheptadienes through competing VCPR and [3,3]-rearrangement pathways, respectively. More controlled rearrangement of ethyl 3-(1'(2'2'-difluoro-3'-benzo[d][1,3]dioxol-5-yl)cyclopropyl)propenoate (22) allowed these competing pathways to be monitored at the same time and activation energies for both reactions were determined; Ea(VCPR) = (23.4 ± 0.2) kcal mol-1 and Ea([3,3]) = (24.9 ± 0.3) kcal mol-1. Comparing our calculated activation energies with these parameters showed that no single method stood out as the most accurate for predicting barrier heights; (U)M05-2X/6-31+G* methodology remained the best for VCPR but M06-2X/6-31G* was better for the [3,3]-rearrangement. The consistency observed with (U)B3LYP/6-31G* calculations meant that it came closest to a universal method for dealing with these systems. The developed computational design model correctly predicted the observed selectivity of rearrangement pathways for both our system and literature compounds.
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Affiliation(s)
- David Orr
- WestCHEM Department of Pure and Applied Chemistry , University of Strathclyde , Thomas Graham Building, 295 Cathedral Street , Glasgow , G1 1XL , UK .
| | - Jonathan M Percy
- WestCHEM Department of Pure and Applied Chemistry , University of Strathclyde , Thomas Graham Building, 295 Cathedral Street , Glasgow , G1 1XL , UK .
| | - Zoë A Harrison
- Refractory Respiratory Inflammation DPU , GlaxoSmithKline Medicines Research Centre , Gunnels Wood Road , Stevenage , SG1 2NY , UK
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20
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Takeda T, Tateishi K, Tsubouchi A. Stereoselective preparation of (E)- and (Z)-di- and trisubstituted 1,3-butadienes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Haraguchi R, Takada Y, Matsubara S. Preparation of cycloheptane ring by nucleophilic cyclopropanation of 1,2-diketones with bis(iodozincio)methane. Org Biomol Chem 2015; 13:241-7. [DOI: 10.1039/c4ob01474j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nucleophlic cyclopropanation of hexa-1,5-diene-3,4-diones with bis(iodozincio)methane afforded the Zn alkoxides of cyclohepta-2,7-diene-1,2-diols stereospecifically via Zn alkoxides of cis-dialkenylcyclopropane-1,2-diols.
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Affiliation(s)
- Ryosuke Haraguchi
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Yoshiaki Takada
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Seijiro Matsubara
- Department of Material Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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22
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Guzmán PE, Lian Y, Davies HM. Reversal of the regiochemistry in the rhodium-catalyzed [4+3] cycloaddition between vinyldiazoacetates and dienes. Angew Chem Int Ed Engl 2014; 53:13083-7. [PMID: 25266984 PMCID: PMC4608551 DOI: 10.1002/anie.201406440] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 08/02/2014] [Indexed: 12/15/2022]
Abstract
A regio-, diastereo-, and enantioselective [4+3] cycloaddition between vinylcarbenes and dienes has been achieved using the dirhodium tetracarboxylate catalyst [Rh2(S-BTPCP)4]. This methodology provides facile access to 1,4-cycloheptadienes that are regioisomers of those formed from the tandem cyclopropanation/Cope rearrangement reaction of vinylcarbenes with dienes.
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Affiliation(s)
- Pablo E. Guzmán
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322 (USA)
| | - Yajing Lian
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322 (USA)
| | - Huw M.L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322 (USA)
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23
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Guzmán PE, Lian Y, Davies HML. Reversal of the Regiochemistry in the Rhodium-Catalyzed [4+3] Cycloaddition between Vinyldiazoacetates and Dienes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406440] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Oblak EZ, VanHeyst MD, Li J, Wiemer AJ, Wright DL. Cyclopropene cycloadditions with annulated furans: total synthesis of (+)- and (-)-frondosin B and (+)-frondosin A. J Am Chem Soc 2014; 136:4309-15. [PMID: 24575795 DOI: 10.1021/ja413106t] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric total syntheses of the natural products (+)- and (-)-frondosin B and (+)-frondosin A are reported based on a diastereoselective cycloaddition between tetrabromocyclopropene and an annulated furan to provide a highly functionalized common building block. The bridged bicyclic intermediate could be stereo- and chemoselectively manipulated to produce the two structurally distinct members of the frondosins. Both syntheses feature regioselective palladium-coupling reactions and an unprecedented phosphine-mediated ether bridge cleavage. Surprisingly, the planned enantioselective synthesis of frondosin B led to the opposite epimer of the natural product, suggesting an unusual late stage stereoinversion at C8. Frondosin A, but not frondosin B, was shown to have selective antiproliferative activity against several B-cell lines.
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Affiliation(s)
- E Zachary Oblak
- Department of Pharmaceutical Sciences, University of Connecticut , 69 N. Eagleville Road, Storrs, Connecticut 06269, United States
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25
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Krüger S, Gaich T. Recent applications of the divinylcyclopropane-cycloheptadiene rearrangement in organic synthesis. Beilstein J Org Chem 2014; 10:163-93. [PMID: 24605138 PMCID: PMC3943923 DOI: 10.3762/bjoc.10.14] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/11/2013] [Indexed: 12/03/2022] Open
Abstract
This review summarizes the application of the divinylcyclopropane–cycloheptadiene rearrangement in synthetic organic chemistry. A brief overview of the new mechanistic insights concerning the title reaction is provided as well as a condensed account on the biological relevance of the topic. Heteroatom variants of this rearrangement are covered briefly.
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Affiliation(s)
- Sebastian Krüger
- Institut für Organische Chemie, Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Tanja Gaich
- Institut für Organische Chemie, Leibniz Universität Hannover, Schneiderberg 1B, 30167 Hannover, Germany
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26
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The Synthesis of Seven-Membered Rings in Natural Products. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63281-4.00014-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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27
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Wang LF, Shi ZF, Cao XP, Li BS, An P. Construction of fused- and spiro-oxa-[n.2.1] skeletons by a tandem epoxide rearrangement/intramolecular [3+2] cycloaddition of cyclopropanes with carbonyls. Chem Commun (Camb) 2014; 50:8061-4. [DOI: 10.1039/c4cc02641a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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28
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Laplace DR, Verbraeken B, Van Hecke K, Winne JM. Total Synthesis of (+/−)-Frondosin B and (+/−)-5-epi-Liphagal by Using a Concise (4+3) Cycloaddition Approach. Chemistry 2013; 20:253-62. [DOI: 10.1002/chem.201303273] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Indexed: 11/07/2022]
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29
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Parr BT, Davies HML. Rhodium-catalyzed tandem cyclopropanation/Cope rearrangement of 4-alkenyl-1-sulfonyl-1,2,3-triazoles with dienes. Angew Chem Int Ed Engl 2013; 52:10044-7. [PMID: 23913819 DOI: 10.1002/anie.201304310] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2013] [Indexed: 11/09/2022]
Abstract
Take your pick… A practical method for the synthesis of structurally diverse rhodium vinylcarbenes from stable 1-sulfonyl-1,2,3-triazole precursors has been developed. The reaction is general for a broad range of 4-alkenyl triazoles and dienes, enabling the stereoselective synthesis of a variety of polycyclic imines, which are readily converted into amines or aldehydes in a one-pot process.
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Affiliation(s)
- Brendan T Parr
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA 30322 (USA) http://www.chemistry.emory.edu/faculty/davies/Home.html
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30
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Parr BT, Davies HML. Rhodium-Catalyzed Tandem Cyclopropanation/Cope Rearrangement of 4-Alkenyl-1-sulfonyl-1,2,3-triazoles with Dienes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304310] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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Cao Z, Gagosz F. Gold-Catalyzed Tandem Cycloisomerization/Cope Rearrangement: An Efficient Access to the Hydroazulenic Motif. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304497] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Cao Z, Gagosz F. Gold-catalyzed tandem cycloisomerization/Cope rearrangement: an efficient access to the hydroazulenic motif. Angew Chem Int Ed Engl 2013; 52:9014-8. [PMID: 23857956 DOI: 10.1002/anie.201304497] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Ziping Cao
- Département de Chimie, UMR 7652 and 7653 CNRS, Ecole Polytechnique, 91128 Palaiseau, France
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33
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Pagar VV, Jadhav AM, Liu RS. Gold-Catalyzed Reactions between Alkenyldiazo Carbonyl Species and Acetals. J Org Chem 2013; 78:5711-6. [DOI: 10.1021/jo400419d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Appaso M. Jadhav
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC
| | - Rai-Shung Liu
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC
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34
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Shu D, Song W, Li X, Tang W. Rhodium- and platinum-catalyzed [4+3] cycloaddition with concomitant indole annulation: synthesis of cyclohepta[b]indoles. Angew Chem Int Ed Engl 2013; 52:3237-40. [PMID: 23401302 PMCID: PMC3690624 DOI: 10.1002/anie.201209266] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Indexed: 11/05/2022]
Affiliation(s)
- Dongxu Shu
- The School of Pharmacy, University of Wisconsin, Madison, WI 53705-2222, USA
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35
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Shu D, Song W, Li X, Tang W. Rhodium- and Platinum-Catalyzed [4+3] Cycloaddition with Concomitant Indole Annulation: Synthesis of Cyclohepta[b]indoles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209266] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Schevenels F, Tinant B, Declercq JP, Markó IE. Preparation of Highly Functionalised Benzofurans fromortho-Hydroxyphenones and Dichloroethylene: Applications and Mechanistic Investigations. Chemistry 2013; 19:4335-43. [DOI: 10.1002/chem.201201505] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 11/12/2012] [Indexed: 11/10/2022]
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37
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Jadhav AM, Pagar VV, Liu RS. Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds. Angew Chem Int Ed Engl 2012; 51:11809-13. [DOI: 10.1002/anie.201205692] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Revised: 09/05/2012] [Indexed: 11/08/2022]
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38
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Jadhav AM, Pagar VV, Liu RS. Development of a Povarov Reaction/Carbene Generation Sequence for Alkenyldiazocarbonyl Compounds. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205692] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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39
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Merey G, Kaya M, Anaç O. The Reactions of α-Ylidene (Vinylidene, Benzylidene, Styrylmethylidene) Bis[carbonyls] with Copper Mono/Bis[carbonylcarbenoids]. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Zhang J, Li L, Wang Y, Wang W, Xue J, Li Y. A novel, facile approach to frondosin B and 5-epi-liphagal via a new [4 + 3]-cycloaddition. Org Lett 2012; 14:4528-30. [PMID: 22889048 DOI: 10.1021/ol3020013] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new [4 + 3]-cycloaddition between benzofuran allylic alcohols and dienes, promoted by camphorsulfonic acid, has been identified. A novel strategy which used this cycloaddition as a key step has been developed for the synthesis of 6,7,5-tricyclic skeleta, and syntheses toward frondosin B (1) and 5-epi-liphagal (2) have been achieved via short routes in good yields.
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Affiliation(s)
- Jie Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gnasu, PR China
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41
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Haraguchi R, Takada Y, Matsubara S. Rapid Preparation of Cycloheptane Ring from 1,2-Diketone and Bis(iodozincio)methane via Oxy-Cope Rearrangement Using Microflow System. CHEM LETT 2012. [DOI: 10.1246/cl.2012.628] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ryosuke Haraguchi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
| | - Yoshiaki Takada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
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42
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Barluenga J, Quiñones N, Tomás-Gamasa M, Cabal MP. Intermolecular Metal-Free Cyclopropanation of Alkenes Using Tosylhydrazones. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200149] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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43
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Pepper HP, Kuan KKW, George JH. Synthesis of a Liphagal–Frondosin C Hybrid and Speculation on the Biosynthesis of the Frondosins. Org Lett 2012; 14:1524-7. [DOI: 10.1021/ol300257v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Henry P. Pepper
- School of Chemistry & Physics, University of Adelaide, North Terrace, Adelaide SA 5005, Australia
| | - Kevin K. W. Kuan
- School of Chemistry & Physics, University of Adelaide, North Terrace, Adelaide SA 5005, Australia
| | - Jonathan H. George
- School of Chemistry & Physics, University of Adelaide, North Terrace, Adelaide SA 5005, Australia
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44
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Liu Y, Ma S. Benzofurans or Isochromenes via the Ring-Opening Cyclization of Cyclopropene Derivatives with Organolithiums. Org Lett 2012; 14:720-3. [DOI: 10.1021/ol2032009] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
| | - Shengming Ma
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China, and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
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45
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Xu X, Hu WH, Zavalij PY, Doyle MP. Divergent Outcomes of Carbene Transfer Reactions from Dirhodium- and Copper-Based Catalysts Separately or in Combination. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105557] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Xu X, Hu WH, Zavalij PY, Doyle MP. Divergent outcomes of carbene transfer reactions from dirhodium- and copper-based catalysts separately or in combination. Angew Chem Int Ed Engl 2011; 50:11152-5. [PMID: 25097911 DOI: 10.1002/anie.201105557] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xinfang Xu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA
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47
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Abstract
A triple cascade process was developed for the rapid synthesis of polycyclic benzo-fused dihydrofurans. The first step is a rhodium-catalyzed cyclopropanation of α-aryldiazoketones with alkenes. This is followed by a silver-catalyzed ring expansion to dihydrofurans, which then undergo a gold-catalyzed cyclization to form benzo-fused dihydrofurans.
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48
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Ivanova OA, Budynina EM, Chagarovskiy AO, Kaplun AE, Trushkov IV, Melnikov MY. Lewis Acid-Catalyzed [3+4] Annulation of 2-(Heteroaryl)- cyclopropane-1,1-dicarboxylates with Cyclopentadiene. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000783] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Benjamin NM, Martin SF. Enantioselective synthesis of 2,2,5-tri- and 2,2,5,5-tetrasubstituted tetrahydrofurans via [4 + 2] cycloaddition and ring-opening cross-metathesis. Org Lett 2011; 13:450-3. [PMID: 21210696 DOI: 10.1021/ol102798f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A chiral vinyl sulfoxide has been developed that undergoes highly diastereoselective Diels-Alder cycloadditions with various substituted furans in excellent yield. The cycloadducts can be stereoselectively transformed into 2,2,5-tri- and 2,2,5,5-tetrasubstituted tetrahydrofurans, which are structural subunits of many natural products, via regioselective ring-opening metathesis/cross-metathesis or oxidative cleavage/refunctionalization.
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Affiliation(s)
- Noah M Benjamin
- Department of Chemistry & Biochemistry, The University of Texas at Austin, Austin, Texas 78712, USA
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50
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Lee DW, Pandey RK, Lindeman S, Donaldson WA. Reactivity of acyclic (pentadienyl)iron(1+) cations: Synthetic studies directed toward the frondosins. Org Biomol Chem 2011; 9:7742-7. [DOI: 10.1039/c1ob05720k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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