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Zhang Z, Sun H, Zhang M, Song S, Peng M, Dai W, Wang Y, Yu F. Switchable Skeletal Rearrangement of Hexahydro-4 H-indol-4-ones: Divergent Synthesis of Dihydroxy-4 H-cyclopenta[ b]pyridin-4-ones and 8-Alkenyl Oxepane-2,6-diones. Org Lett 2024; 26:4205-4211. [PMID: 38743606 DOI: 10.1021/acs.orglett.4c00908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
An unprecedented base-controlled selective skeletal rearrangement reaction of hexahydro-4H-indol-4-ones has been developed. In this protocol, highly functionalized dihydroxy-4H-cyclopenta[b]pyridin-4-ones and 8-alkenyl oxepane-2,6-diones were prepared with a broad substrate scope and high chemoselectivity in moderate to excellent yields selectively by modulating LiOH and Et3N. In addition, the newly formed 8-alkenyl oxepane-2,6-dione scaffolds could be easily further derivatized to 5-(pyrrol-2-yl)dihydrofuran-2(3H)-ones through a rare intramolecular rearrangement reaction.
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Affiliation(s)
- Zhilai Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Haifeng Sun
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Mingshuai Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Siyu Song
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Menglin Peng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Weifeng Dai
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Yongchao Wang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, People's Republic of China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
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2
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Kaur S, Kaur J, Islam N, Anand A. Organocatalytic Synthesis and DFT Study of Versatile Biologically Active Scaffold of Isatylidene Malononitrile Derivatives. ChemistrySelect 2022. [DOI: 10.1002/slct.202203894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sukhmeet Kaur
- Department of Chemistry Khalsa College Amritsar 143001 India
| | - Jasneet Kaur
- Department of Chemistry Khalsa College Amritsar 143001 India
| | - Nasarul Islam
- Department of Chemistry Govt. Degree College Bandipora- 193502 Kashmir India
| | - Amit Anand
- Department of Chemistry Khalsa College Amritsar 143001 India
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3
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Wang J, Li J, Wang Y, He S, You H, Chen FE. Polymer-Supported Chiral Heterogeneous Copper Catalyst for Asymmetric Conjugate Addition of Ketones and Imines under Batch and Flow. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Junwen Wang
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
| | - Jun Li
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
| | - Yan Wang
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
| | - Sisi He
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
| | - Hengzhi You
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
- Green Pharmaceutical Engineering Research Center, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
| | - Fen-Er Chen
- School of science, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
- Green Pharmaceutical Engineering Research Center, Harbin Institute of Technology (Shenzhen), Taoyuan Street, Nanshan District, Shenzhen 518055, China
- Engineering Center of Catalysis and Synthesis for Chiral Molecules, Department of Chemistry, Fudan University, Shanghai 200433, China
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4
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Yang X, Sun J, Huang X, Jin Z. Asymmetric Synthesis of Structurally Sophisticated Spirocyclic Pyrano[2,3- c]pyrazole Derivatives Bearing a Chiral Quaternary Carbon Center. Org Lett 2022; 24:5474-5479. [PMID: 35857420 DOI: 10.1021/acs.orglett.2c02211] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A carbene-catalyzed enantio- and diastereoselective [2 + 4] cycloaddition reaction is developed for quick and efficient access to structurally complex multicyclic pyrano[2,3-c]pyrazole molecules. The reaction tolerates a broad scope of substrates bearing various substitution patterns, with the multicyclic pyrano[2,3-c]pyrazole products afforded in generally good to excellent yields and optical purities. The chiral molecules obtained from this approach has found promising applications in the development of novel bacteriacides for plant protection.
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Affiliation(s)
- Xiaoqun Yang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Jun Sun
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Xuan Huang
- International Joint Research Center for Molecular Science, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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5
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Ahlburg NL, Freese T, Kolb S, Mummel S, Schmidt A, Werz DB. Functionalization of Sydnones with Donor‐Acceptor Cyclopropanes, Cyclobutanes, and Michael Acceptors. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100070] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Nils L. Ahlburg
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Tyll Freese
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Simon Kolb
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Sebastian Mummel
- Clausthal University of Technology Institute of Organic Chemistry Leibnizstraße 6 38678 Clausthal-Zellerfeld Germany
| | - Andreas Schmidt
- Clausthal University of Technology Institute of Organic Chemistry Leibnizstraße 6 38678 Clausthal-Zellerfeld Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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6
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Abstract
This review summaries recent synthetic developments towards spirocyclic oxindoles and applications as valuable medicinal and synthetic targets.
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Affiliation(s)
- Alexander J. Boddy
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
| | - James A. Bull
- Department of Chemistry
- Imperial College London
- Molecular Sciences Research Hub
- London W12 0BZ
- UK
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7
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Ahlburg NL, Jones PG, Werz DB. cis-Selective, Enantiospecific Addition of Donor-Acceptor Cyclopropanes to Activated Alkenes: An Iodination/Michael-Cyclization Cascade. Org Lett 2020; 22:6404-6408. [PMID: 32806195 DOI: 10.1021/acs.orglett.0c02210] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We present a versatile method for the enantiospecific, cis-diastereoselective intermolecular and intramolecular cycloaddition of donor-acceptor cyclopropanes to electron-poor alkenes with cyclic acceptor groups to afford highly substituted spirocyclopentanes in good to excellent yields. The reaction can be applied to biologically interesting scaffolds, including barbiturates and isoxazolones. Mechanistic investigations were undertaken to explain the unusual diastereoselectivity and enantiospecificity; these suggest an iodination/Michael-cyclization cascade.
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Zhu X, Pan D, Mou C, Zhou B, Pan L, Jin Z. Green and Facile Synthesis of Spirocyclopentanes Through NaOH-Promoted Chemo- and Diastereo-Selective (3 + 2) Cycloaddition Reactions of Activated Cyclopropanes and Enamides. Front Chem 2020; 8:542. [PMID: 32676495 PMCID: PMC7333539 DOI: 10.3389/fchem.2020.00542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 05/26/2020] [Indexed: 01/13/2023] Open
Abstract
A chemo- and diastereo-selective (3 + 2) cycloaddition reacition between Donor-Acceptor (D-A) cyclopropanes and α,β-unsaturated enamides is developed for efficient access to spiro(cyclopentane-1,3'-indoline) derivatives. Simple, inexpensive and readily available NaOH is used as the sole catalyst for this process. A broad range of D-A cyclopropanes could be used as the C-3 synthons to react with oxindole-derived α,β-unsaturated enamides. The structurally sophisticated spiro(cyclopentane-1,3'-indoline) derivatives bearing up to 3 adjacent chiral centers are afforded in excellent yields as single diastereomers.
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Affiliation(s)
- Xun Zhu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Guiyang, China
| | - Dingwu Pan
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Guiyang, China
| | - Chengli Mou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Bo Zhou
- R&D Center, Shenzhen AmTech Bioengineering Ltd., Inc., Shenzhen, China
| | - Lutai Pan
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Guiyang, China
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9
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Lücht A, Kreft A, Jones PG, Werz DB. Ketenedithioacetals as Surrogates for the Formal Insertion of Ketenes into Donor–Acceptor Cyclopropanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000233] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Alexander Lücht
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Alexander Kreft
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
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