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Kato R, Suzuki T, Tanino K. Synthesis of dihydrotropone derivatives using an anionic 8π-electrocyclic reaction. Chem Commun (Camb) 2024; 60:6619-6622. [PMID: 38847207 DOI: 10.1039/d4cc02273d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
A new method to synthesise functionalised cycloheptatrienes was established using the anionic 8π-electrocyclic reaction of β-ketoester-derived dienyne substrates. The cyclised products were converted to a variety of cycloheptatriene derivatives including tropones. Using this method, a concise, first total synthesis of (-)-orobanone, a natural sesquiterpenoid, was achieved.
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Affiliation(s)
- Ranmaru Kato
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo 060-0810, Japan
| | - Takahiro Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
| | - Keiji Tanino
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
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2
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Liu L, Du L, Li B. Recent advances in 8π electrocyclization reactions. Chem Commun (Camb) 2023; 59:670-687. [PMID: 36597987 DOI: 10.1039/d2cc04805a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Medium-ring systems, which constitute a class of structurally intriguing and biologically important molecules, are present in many natural products and pharmaceuticals. However, the construction of these skeletons tends to be difficult because of the torsional strain of the medium-sized ring, and control of the selectivity is also challenging in these flexible skeletons. Electrocyclization is one of the most straightforward methods to construct medium-sized rings and this process typically proceeds in a stereospecific manner, resulting in the stereo-controlled formation of two neighboring stereocenters. At present, there are few studies on 8π electrocyclization, mainly focusing on the synthesis of small molecules, while the applications in the synthesis of functional materials and biological contexts are rare. This feature article highlights recent advances, from 2000 to 2022, in the 8π electrocyclization reaction. This study is organized into four sections based on the size/composition of the target ring, including the synthesis of aza-seven-membered, cycloheptene, cyclooctene and bicyclo[4,2,0]octane frameworks. We expect that this feature article will provide beneficial guidance for the selective construction of medium-ring skeletons.
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Affiliation(s)
- Lei Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China.
| | - Luan Du
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China.
| | - Baosheng Li
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, China.
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3
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Fan W, Xiang S, Li Y, Zhang W, Guo S, Huang D. Iodine-Mediated Pyridine Ring Expansion for the Construction of Azepines. Org Lett 2022; 24:2075-2080. [PMID: 35285653 DOI: 10.1021/acs.orglett.2c00130] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A synthesis of azepines by the expansion of pyridine rings promoted by iodine in air is reported. The scope of the method is demonstrated with 27 examples. Two iodinations are involved in the reaction, in which the second iodination leads to the opening of the six-membered ring.
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Affiliation(s)
- Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shiqun Xiang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Yinghua Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Wei Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
| | - Shiwei Guo
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Deguang Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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4
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Synthesis of diverse 2,3,4,5-tetrahydro-1H-azepine derivatives via sequential Knoevenagel reaction and Michael addition of tertiary enamide. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153174] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Shan Y, Su L, Zhao Z, Chen D. The Construction of Nitrogen‐Containing Heterocycles from Alkynyl Imines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001283] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yingying Shan
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Lei Su
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Zihan Zhao
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
| | - Dianpeng Chen
- Chemistry and Chemical Engineering Qufu Normal University, Qufu 273165 Shandong China
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6
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Affiliation(s)
- Longlong Li
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Dayun Huang
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Chengjin Shi
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
| | - Guobing Yan
- Department of ChemistryLishui University No. 1, Xueyuan Road Lishui City 323000 Zhejiang Province People's Republic of China
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7
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Zhou MB, Song RJ, Li JH. Hexafluoroantimonic Acid Catalysis: Formal [3+2+2] Cycloaddition of Aziridines with Two Alkynes. Angew Chem Int Ed Engl 2014; 53:4196-9. [DOI: 10.1002/anie.201310944] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 01/16/2014] [Indexed: 12/14/2022]
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8
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Zhou MB, Song RJ, Li JH. Hexafluoroantimonic Acid Catalysis: Formal [3+2+2] Cycloaddition of Aziridines with Two Alkynes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310944] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9
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Neue B, Wakamiya A, Fröhlich R, Wibbeling B, Yamaguchi S, Würthwein EU. Modification and Unexpected Reactivity of 2-Borylbenzaldimines: Acylated and Silylated Derivatives as Well as Dimeric Compounds. J Org Chem 2013; 78:11747-55. [DOI: 10.1021/jo401748d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Benedikt Neue
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Atsushi Wakamiya
- Institute for Chemical Research, Kyoto University Uji,
Gokasho, Kyoto 611-0011, Japan
| | - Roland Fröhlich
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Birgit Wibbeling
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Shigehiro Yamaguchi
- Department of Chemistry, Graduate
School of
Science, Nagoya University, Furo, Chikusa, Nagoya 464-8602, Japan
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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10
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Zhou MB, Song RJ, Wang CY, Li JH. Synthesis of Azepine Derivatives by Silver-Catalyzed [5+2] Cycloaddition ofγ-Amino Ketones with Alkynes. Angew Chem Int Ed Engl 2013; 52:10805-8. [DOI: 10.1002/anie.201304902] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 07/18/2013] [Indexed: 11/10/2022]
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11
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Zhou MB, Song RJ, Wang CY, Li JH. Synthesis of Azepine Derivatives by Silver-Catalyzed [5+2] Cycloaddition ofγ-Amino Ketones with Alkynes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304902] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Nedolya NA, Trofimov BA. [1,7]-Electrocyclization reactions in the synthesis of azepine derivatives. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1236-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Neue B, Reiermann R, Gerdes K, Fröhlich R, Wibbeling B, Würthwein EU. Ring closure reactions of 2,6-diazaheptatrienyl metal compounds: synthesis of 3-aminoindole derivatives and 14-membered macrocyclic dimers. J Org Chem 2011; 76:8794-806. [PMID: 21988327 DOI: 10.1021/jo201521v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2,6-Diazaheptatrienyl metal compounds 6(-)K(+) are easily accessible from the corresponding diimines 6 by deprotonation using KO-t-Bu as base. According to quantum chemical calculations, they are, in comparison to other isomeric species with nitrogen atoms in other positions, highly reactive intermediates, which undergo in dilute solution at 50 °C ring closure reactions to form 3-aminoindole derivatives 8/10. In contrast, in more concentrated solution at room temperature, the formation of 14-membered macrocyclces 13 as a result of formal dimerization is observed. The 3-aminoindole derivatives obtained in this work possess rare substitution patterns, and the macrocyclic compounds are essentially unknown. Two-fold vinylogous derivatives 7 give rise to tricyclic systems with δ-carboline backbone 12. The experimental results are interpreted using high-level DFT calculations with regard to the possible reaction mechanism and the nature of the transition state of the five-membered ring formation. The molecular structures in the solid state of all types of compounds were elucidated by X-ray diffraction.
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Affiliation(s)
- Benedikt Neue
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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14
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Yin G, Zhu Y, Lu P, Wang Y. Lewis Acid-Promoted Three-Component Reactions of Propargylic Alcohols with 2-Butynedioates and Secondary Amines. J Org Chem 2011; 76:8922-9. [DOI: 10.1021/jo2016407] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Guangwei Yin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yuanxun Zhu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Ping Lu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Yanguang Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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15
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Nedolya NA, Tarasova OA, Volostnykh OG, Albanov AI, Trofimov BA. Simultaneous synthesis of 4,5-dihydro-3H-azepines and 3H-azepines, bearing alkoxy and alkylsulfanyl substituents, through metallation of 2-aza-1,3,5-trienes by t-BuOK. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.07.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Ghavtadze N, Fröhlich R, Würthwein EU. Indole as Neutral Leaving Group in Silver Nitrate Induced Cyclization Reactions ofN-{2-[Alkynyl(hetero)aryl]methylene}indolin-1-amines for the Synthesis of Annulated Pyridine Derivatives. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901471] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Kumar S, Peruncheralathan S, Ila H, Junjappa H. A Novel Anionic Domino Process for the Synthesis of o-Cyanoaryl-Methylthio/Alkyl/Aryl/Heteroaryl Acetylenes. Org Lett 2008; 10:965-8. [DOI: 10.1021/ol800029c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarvesh Kumar
- Department of Chemistry, Indian Institute of Technology, Kanpur- 208016, India
| | | | - Hiriyakkanavar Ila
- Department of Chemistry, Indian Institute of Technology, Kanpur- 208016, India
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