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Song JR, Li XJ, Shi J, Chi Q, Wu W, Ren H. Direct synthesis of N-functionalized indoles through isomerization of azomethine ylides. Org Biomol Chem 2024; 22:741-744. [PMID: 38170630 DOI: 10.1039/d3ob01393f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
An unexpected isomerization of azomethine ylides generated in situ from isatin with indoline-2-carboxylic acid has been disclosed, providing direct access to N-functionalized indole scaffolds. This protocol has good functional group tolerance and provides various 3-(1H-indol-1-yl)indolin-2-one derivatives in moderate to high yields simply by using alcohol as the solvent, with no additional additive being required.
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Affiliation(s)
- Jun-Rong Song
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
| | - Xiong-Jiang Li
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
| | - Jun Shi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
| | - Qin Chi
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
| | - Wei Wu
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, P. R. China.
- The Natural Products Research Center of Guizhou Province, Guiyang 550014, P. R. China
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2
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Kavitha Preethi R, Kannadasan S, Shanmugam P. Azomethine ylide [3 + 2]-cycloaddition of 3-alkylidene-7-aza-2-indolone: Synthesis of 3,3′-dispiropyrrolidine- and 3,3′-dispiropyrrolizidine bis 7-aza-2-oxindoles. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Wang Y, Yan L, Yan Y, Li S, Lu H, Liu J, Dong J. Dipolarophile-Controlled Regioselective 1,3-Dipolar Cycloaddition: A Switchable Divergent Access to Functionalized N-Fused Pyrrolidinyl Spirooxindoles. Int J Mol Sci 2023; 24:ijms24043771. [PMID: 36835183 PMCID: PMC9966135 DOI: 10.3390/ijms24043771] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/10/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
N-fused pyrrolidinyl spirooxindole belongs to a class of privileged heterocyclic scaffolds and is prevalent in natural alkaloids and synthetic pharmaceutical molecules. To realize the switchable synthesis of divergent N-fused pyrrolidinyl spirooxindoles for further biological activity evaluation via a substrate-controlled strategy, a chemically sustainable, catalysis-free, and dipolarophile-controlled three-component 1,3-dipolar cycloaddition of isatin-derived azomethine ylides with diverse dipolarophiles is described in this work. A total of 40 functionalized N-fused pyrrolidinyl spirooxindoles were synthesized in 76-95% yields with excellent diastereoselectivities (up to >99:1 dr). The scaffolds of these products can be well-controlled by employing different 1,4-enedione derivatives as dipolarophiles in EtOH at room temperature. This study provides an efficient strategy to afford a spectrum of natural-like and potentially bioactive N-fused pyrrolidinyl spirooxindoles.
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Affiliation(s)
- Yongchao Wang
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
- Correspondence: or (Y.W.); (J.D.)
| | - Lijun Yan
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
| | - Yuxin Yan
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
| | - Sujin Li
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
| | - Hongying Lu
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
| | - Jia Liu
- Colleage of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, China
| | - Jianwei Dong
- Colleage of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China
- Correspondence: or (Y.W.); (J.D.)
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4
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Palomba M, De Monte E, Mambrini A, Bagnoli L, Santi C, Marini F. A three-component [3 + 2]-cycloaddition/elimination cascade for the synthesis of spirooxindole-pyrrolizines. Org Biomol Chem 2021; 19:667-676. [PMID: 33399163 DOI: 10.1039/d0ob02321c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A three-component synthesis of novel spirooxindole-tetrahydropyrrolizines from secondary α-aminoacids, isatins and vinyl selenones has been disclosed. Products were formed in good yields and high diastereoselectivity by 1,3-dipolar cycloaddition of in situ generated azomethine ylides followed by spontaneous elimination of benzeneseleninic acid. Good regioselectivities with aryl substituted vinyl selenones were observed. The method showed good functional group tolerance, providing a direct approach to biologically relevant spirooxindoles under mild reaction conditions.
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Affiliation(s)
- Martina Palomba
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Emanuela De Monte
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Andrea Mambrini
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Luana Bagnoli
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Claudio Santi
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
| | - Francesca Marini
- Department of Pharmaceutical Sciences (Group of Catalysis, Synthesis and Organic Green Chemistry), University of Perugia, Via del Liceo, 1 - 06123 Perugia, Italy.
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5
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Krishna Rao MV, Reddy KN, Sridhar B, Subba Reddy BV. Decarboxylative Coupling of Cyclic α‐Amino Acid with Aldehyde and Kojic Acid: Direct Access to 2‐Pyrrolidinyl and 2‐Piperidinyl Kojic Acid Derivatives. ChemistrySelect 2018. [DOI: 10.1002/slct.201802883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | - K. Nagarjuna Reddy
- Centre for Semiochemicals
- Academy of Scientific and Innovative Research New Delhi- 110025 India
| | - B. Sridhar
- Laboratory of X-ray CrystallographyCSIR-Indian Institute of Chemical Technology Hyderabad– 500 007 India
| | - B. V. Subba Reddy
- Centre for Semiochemicals
- Academy of Scientific and Innovative Research New Delhi- 110025 India
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6
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Guo J, Zhao Y, Fang D, Wang Q, Bu Z. Diastereoselective construction of pyrrolo[2,1-a]isoquinoline-based bispirooxindoles through a three-component [3 + 2] cycloaddition. Org Biomol Chem 2018; 16:6025-6034. [DOI: 10.1039/c8ob01493k] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient and highly diastereoselective three-component one-pot [3 + 2] cycloaddition of isatins, 1,2,3,4-tetrahydroisoquinolines and methyleneindolinones has been developed to afford a wide range of pyrrolo[1,2-a]isoquinoline-based bispirooxindoles in up to 91% yields.
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Affiliation(s)
- Jiaomei Guo
- Institute of Functional Organic Molecular Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Yang Zhao
- Institute of Functional Organic Molecular Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Dongmei Fang
- Chengdu Institute of Biology
- Chinese Academy of Sciences
- Chengdu 610041
- China
| | - Qilin Wang
- Institute of Functional Organic Molecular Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
| | - Zhanwei Bu
- Institute of Functional Organic Molecular Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng 475004
- China
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7
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One-Pot Green Regioselesctive Synthesis of γ-Lactones from Epoxides and Ketene Silyl Acetals Using 1,3-Dimethylimidazolium Fluoride as a Recoverable Metal-Free Catalyst. Molecules 2017; 22:molecules22091385. [PMID: 28846652 PMCID: PMC6151549 DOI: 10.3390/molecules22091385] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 08/18/2017] [Accepted: 08/19/2017] [Indexed: 01/11/2023] Open
Abstract
In a straightforward and fast protocol, a mixture of 1,3-dimethylimidazolium fluoride ([DMIM]F) and 1-butylimidazolium tetrafluoroborate ([Hbim]BF4) efficiently catalyzed the reaction of epoxides with ketene silyl acetals (KSA) to give various γ-lactones under metal-free conditions. Diverse kinds of the desired γ-lactones were directly prepared with high regioselectivities and yields in a simple one-pot procedure using [DMIM]F as Si–O bond activator and [Hbim]BF4 as solvent and acidic ionic liquid catalyst. The ionic liquid mixture was recovered and reused three times and no loss in its activity was observed.
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