1
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Ye J, Liu Y, Luo J, Wan JP. "Alkene-to-Alkene" Difunctionalization of Enaminones for the Synthesis of Polyfunctionalized Alkenes by Transition-Metal-Free C-H and C-N Bond Transformation. Org Lett 2023; 25:8451-8456. [PMID: 37971945 DOI: 10.1021/acs.orglett.3c03353] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The three-component reactions of enaminones, disulfides, and alcohols for the synthesis of polyfunctionalized alkenes have been realized via the C-H and C-N bond transformation on enaminones. The reactions proceed in a novel "alkene-to-alkene" difunctionalization mode without using any transition metal. The application of the alkene products in the synthesis of divergent sulfenyl heteroaryls, including sulfenylated pyrazoles, pyrimidines, and isoxazoles, via simple annulation has also been verified.
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Affiliation(s)
- Jingfeng Ye
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Yunyun Liu
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jin Luo
- Analytical and Testing Center, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- National Engineering Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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2
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Li YA, Wu G, Li J. Palladium-Catalyzed N-Alkenylation of N-Aryl Phosphoramidates with Alkenes. Molecules 2023; 28:molecules28114466. [PMID: 37298944 DOI: 10.3390/molecules28114466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 05/24/2023] [Accepted: 05/28/2023] [Indexed: 06/12/2023] Open
Abstract
Versatile and concise Pd-catalyzed oxidative N-alkenylation of N-aryl phosphoramidates with alkenes is described in this study, a reaction that is of great significance but surprisingly unexploited. The transformation proceeds under mild reaction conditions, using O2 as a green oxidant and TBAB as an effective additive. An efficient catalytic system allows a variety of drug-related substrates to participate in these transformations, which is of great interest in the drug discovery and development of phosphoramidates.
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Affiliation(s)
- Yu-An Li
- Department of Orthopaedics Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Ge Wu
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325015, China
| | - Jia Li
- Department of Neurology, First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
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3
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Barve BD, Kuo YH, Li WT. Pd-Catalyzed and ligand-enabled alkene difunctionalization via unactivated C-H bond functionalization. Chem Commun (Camb) 2021; 57:12045-12057. [PMID: 34724518 DOI: 10.1039/d1cc04397h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Palladium-catalyzed and ligand-enabled C-H functionalization methods have emerged as a powerful approach for the preparation of therapeutically important motifs and complex natural products. Olefins, owing to their natural abundance, have been extensively employed for the formation of C-C and C-X bonds and the generation of various heterocycles. Traditionally, activated as well as starting materials with preinstalled functional groups, and also halide substrates under transition metal catalysis, have been employed for olefin difunctionalization. However, strategies for employing unactivated C-H bond functionalization to achieve alkene difunctionalization have rarely been explored. A possible solution to this challenge is the application of bulky ligands which enhances the reductive elimination pathway and inhibits β-hydride elimination to selectively yield difunctionalized alkene products. This feature article summarizes the utilization of unreactive C-H bonds in the Pd-catalyzed and ligand-enabled difunctionalization of alkenes.
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Affiliation(s)
- Balaji D Barve
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China. .,Department of Chemistry, National Taiwan Normal University, Taipei 10610, Taiwan, Republic of China
| | - Yao-Haur Kuo
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
| | - Wen-Tai Li
- National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, Republic of China.
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4
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Duan X, Li H, Li W, Wang J, Liu N. NBS‐Promoted C−H Amination of Enaminones for the Synthesis of N‐Heterocycle Substituted Enaminones**. ChemistrySelect 2021. [DOI: 10.1002/slct.202101726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Xiyan Duan
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang 471003 Henan China
| | - Huimin Li
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang 471003 Henan China
| | - Weinan Li
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang 471003 Henan China
| | - Junqi Wang
- School of Chemical Engineering & Pharmaceutics Henan University of Science and Technology Luoyang 471003 Henan China
| | - Ning Liu
- School of Nursing Henan University of Science and Technology Luoyang 471003 Henan China
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5
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Brandão P, Marques CS, Carreiro EP, Pineiro M, Burke AJ. Engaging Isatins in Multicomponent Reactions (MCRs) - Easy Access to Structural Diversity. CHEM REC 2021; 21:924-1037. [PMID: 33599390 DOI: 10.1002/tcr.202000167] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/25/2021] [Indexed: 12/15/2022]
Abstract
Multicomponent reactions (MCRs) are a valuable tool in diversity-oriented synthesis. Its application to privileged structures is gaining relevance in the fields of organic and medicinal chemistry. Isatin, due to its unique reactivity, can undergo different MCRs, affording multiple interesting scaffolds, namely oxindole-derivatives (including spirooxindoles, bis-oxindoles and 3,3-disubstituted oxindoles) and even, under certain conditions, ring-opening reactions occur that leads to other heterocyclic compounds. Over the past few years, new methodologies have been described for the application of this important and easily available starting material in MCRs. In this review, we explore these novelties, displaying them according to the structure of the final products obtained.
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Affiliation(s)
- Pedro Brandão
- University of Coimbra, CQC and Department of Chemistry, 3004-535, Coimbra, Portugal.,LAQV-REQUIMTE, University of Évora, Rua Romão Ramalho, 59, 7000, Évora, Portugal
| | - Carolina S Marques
- LAQV-REQUIMTE, University of Évora, Rua Romão Ramalho, 59, 7000, Évora, Portugal
| | - Elisabete P Carreiro
- LAQV-REQUIMTE, University of Évora, Rua Romão Ramalho, 59, 7000, Évora, Portugal
| | - M Pineiro
- University of Coimbra, CQC and Department of Chemistry, 3004-535, Coimbra, Portugal
| | - Anthony J Burke
- LAQV-REQUIMTE, University of Évora, Rua Romão Ramalho, 59, 7000, Évora, Portugal.,University of Evora, Department of Chemistry, Rua Romão Ramalho, 59, 7000, Évora, Portugal
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6
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Swarnkar S, Ansari MY, Kumar A. Visible-Light-Induced Tertiary C(sp3)–H Sulfonylation: An Approach to Tertiary Sulfones. Org Lett 2021; 23:1163-1168. [DOI: 10.1021/acs.orglett.0c03898] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Sumedha Swarnkar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Mohd Yeshab Ansari
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
| | - Atul Kumar
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India
- Academy of Scientific and Innovative Research, New Delhi 110001, India
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7
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Nguyen KX, Pham PH, Nguyen TT, Yang CH, Pham HTB, Nguyen TT, Wang H, Phan NTS. Trisulfur-Radical-Anion-Triggered C(sp 2)-H Amination of Electron-Deficient Alkenes. Org Lett 2020; 22:9751-9756. [PMID: 33261315 DOI: 10.1021/acs.orglett.0c03846] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A trisulfur-radical-anion (S3̇-)-triggered C(sp2)-H amination of α,β-unsaturated carbonyl derivatives with simple amines has been demonstrated. This protocol provides convenient access to a variety of synthetically valuable N-unprotected and secondary β-enaminones with absolute Z selectivity and tertiary β-enaminones with E selectivity. Mechanistic probe and electronic structure theory calculations suggest that S3̇- initiates the nucleophilic attacks via a thiirane intermediate.
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Affiliation(s)
- Khang X Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Phuc H Pham
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Thao T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.,Tra Vinh University, 126 Nguyen Thien Thanh, Ward 5, Tra Vinh City, Tra Vinh Province, Vietnam
| | - Chou-Hsun Yang
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80204, United States
| | - Hoai T B Pham
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.,Department of Chemistry, University of Colorado Denver, Denver, Colorado 80204, United States
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
| | - Haobin Wang
- Department of Chemistry, University of Colorado Denver, Denver, Colorado 80204, United States
| | - Nam T S Phan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam.,Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
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8
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Swarnkar S, Ansari MY, Kumar A. Tuning the Chemoselectivity of Dehydroacetic Acid Derived Enones by Isoniazid and Phenylhydrazines: An Efficient Access to 3-Styryl Pyrano[2,3- c
]pyrazolones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Sumedha Swarnkar
- Medicinal & Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 226031 Lucknow India
| | - Mohd Yeshab Ansari
- Medicinal & Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 226031 Lucknow India
| | - Atul Kumar
- Medicinal & Process Chemistry Division; CSIR-Central Drug Research Institute; Sector 10, Jankipuram extension; Sitapur Road, P.O. Box 173 226031 Lucknow India
- Academy of Scientific and Innovative Research; 110001 New Delhi India
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9
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Ansari MY, Swarnkar S, Kumar A. Stereoselective aminosulfonylation of alkynes: an approach to access (Z)-β-amino vinylsulfones. Chem Commun (Camb) 2020; 56:9561-9564. [DOI: 10.1039/d0cc03726e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The stereoselective aminosulfonylation of alkynes in a syn mode is accomplished using sodium sulfinates and azoles, in the presence of I2/base and afforded the (Z)-β-amino vinylsulfones in good yields.
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Affiliation(s)
- Mohd Yeshab Ansari
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Sumedha Swarnkar
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
| | - Atul Kumar
- Medicinal & Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow 226031
- India
- Academy of Scientific and Innovative Research
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