1
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Yao CZ, Tu XQ, Zhao ZY, Fan SH, Jiang HJ, Li Q, Yu J. Enantioselective Organocatalyzed Cascade Dearomatizing Spirocycloaddition Reactions of Indole-Ynones. Org Lett 2024. [PMID: 39364785 DOI: 10.1021/acs.orglett.4c03015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2024]
Abstract
An intramolecular organocatalytic cascade dearomatizing spirocycloaddition reaction of indole-ynone compounds containing O-silyl-naphthol substituents has been developed with the use of a chiral bifunctional thiourea. This process was able to provide various structurally diverse polycyclic spiroindolines in high yields (up to 98%) with excellent stereoselectivities (>20:1 dr, up to 98% ee) involving the formation of carbonylvinylidene ortho-quinone methide intermediates.
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Affiliation(s)
- Chuan-Zhi Yao
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Xue-Qin Tu
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Zi-Yuan Zhao
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Sheng-Hui Fan
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Hua-Jie Jiang
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Qiankun Li
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
| | - Jie Yu
- Department of Applied Chemistry, Anhui Province Engineering Laboratory for Green Pesticide Development and Application, and Anhui Province Key Laboratory of Crop Integrated Pest Management, Anhui Agricultural University, 230036 Hefei, China
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2
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Majeed A, Zafar A, Mushtaq Z, Iqbal MA. Advances in gold catalyzed synthesis of quinoid heteroaryls. RSC Adv 2024; 14:21047-21064. [PMID: 38962094 PMCID: PMC11220603 DOI: 10.1039/d4ra03368j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 06/27/2024] [Indexed: 07/05/2024] Open
Abstract
This review explores recent advancements in synthesizing quinoid heteroaryls, namely quinazoline and quinoline, vital in chemistry due to their prevalence in natural products and pharmaceuticals. It emphasizes the rapid, highly efficient, and economically viable synthesis achieved through gold-catalyzed cascade protocols. By investigating methodologies and reaction pathways, the review underscores exceptional yields attainable in the synthesis of quinoid heteroaryls. It offers valuable insights into accessing these complex structures through efficient synthetic routes. Various strategies, including cyclization, heteroarylation, cycloisomerization, cyclo-condensation, intermolecular and intramolecular cascade reactions, are covered, highlighting the versatility of gold-catalyzed approaches. The comprehensive compilation of different synthetic approaches and elucidation of reaction mechanisms contribute to a deeper understanding of the field. This review paves the way for future advancements in synthesizing quinoid heteroaryls and their applications in drug discovery and materials science.
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Affiliation(s)
- Adnan Majeed
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Ayesha Zafar
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Zanira Mushtaq
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
| | - Muhammad Adnan Iqbal
- Department of Chemistry, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
- Organometallic and Coordination Chemistry Laboratory, University of Agriculture Faisalabad Faisalabad-38000 Pakistan
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3
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Sui J, He Y, Wang D, Wang T, Ren K, Liang Y, Zhang Z. Synthesis of cis-(8b,14a)-hexahydro-14H-dibenzo[f,h]oxazolo[3,2-b]isoquinolin-14-ones via photo cascade reaction. Mol Divers 2024:10.1007/s11030-024-10857-1. [PMID: 38643417 DOI: 10.1007/s11030-024-10857-1] [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: 01/25/2024] [Accepted: 03/22/2024] [Indexed: 04/22/2024]
Abstract
A concise method for the synthesis of cis-(8b,14a)-hexahydro-14H-dibenzo[f,h]oxazolo[3,2-b]isoquinolin-14-ones 2 via photo-induced 3-([1,1'-biphenyl]-2-yl)-1-(2-hydroxyethyl)pyridin-2(1H)-ones 1 was developed. Irradiation of 1 in the solution of toluene with a 313 nm UV light in the presence of HCl gave cis-(8b,14a)-9a-α-hexahydro-14H-dibenzo[f,h]oxazolo[3,2-b]isoquinoli n-14-ones and cis-(8b,14a)-9a-β-hexahydro-14H-dibenzo[f,h]oxazolo[3,2-b]isoquinolin-14-ones 2 (2-α and 2-β) in good yields. The protocol simultaneously constructs dearomatized phenanthrene ring and oxindolizidinones ring by photo cascade reaction to achieve high bonding efficiency and high atomic efficiency. Additionally, the antitumor activities of 2 was evaluated and compounds 2b-α, 2b-β, 2j-β and 2 k-α showed similar or better activity compared to the cisplatin against tumor cell lines of Leukemia HL-60, lung cancer A594, liver cancer SMMC-7721 and breast cancer MDA-MB-231.
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Affiliation(s)
- Jingzhi Sui
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Yun He
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ding Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Tao Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Kexin Ren
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Yong Liang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
- Department of Molecular Medicine, Beckman Research Institute of City of Hope, Duarte, CA, 91010, USA
| | - Zunting Zhang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.
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4
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Zhu J, Li J, Zhang L, Sun S, Yang L, Fu J, Sun H, Cheng M, Lin B, Liu Y. Gold(I)-Catalyzed Substitution-Controlled Syntheses of Spiro[indoline-3,3 '-pyrrolidine] and Spiro[indoline-3,3 '-piperidine] Derivatives. J Org Chem 2023. [PMID: 37449800 DOI: 10.1021/acs.joc.3c00604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Spiro[indoline-3,3'-pyrrolidine] and spiro[indoline-3,3'-piperidine] derivatives were synthesized in a substitution-controlled manner under the catalysis of cationic gold(I) species in the presence of Hantzsch ester (HEH). The optimal reaction condition was determined by screening, and the functional group tolerances of these two pathways were examined by readily synthetic substrates. The endo and exo selectivities of these cyclizations were elucidated by density functional theory calculations, and a plausible mechanism for these transformations was proposed.
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Affiliation(s)
- Jiang Zhu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Jiaji Li
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lianjie Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Shitao Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Jiayue Fu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Hanyang Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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5
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Jiang Q, Yang T, Li Q, Liang GM, Liu Y, He CY, Chu WD, Liu QZ. Synthesis of Cyclopenta[ b]indoles via Sc(III)-Catalyzed Annulation of Vinyl Diazoacetates with Indole-Derived Unsaturated Imines. Org Lett 2023; 25:3184-3189. [PMID: 37125696 DOI: 10.1021/acs.orglett.3c00192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A Lewis acid Sc(OTf)3-catalyzed annulation reaction of vinyl diazoacetates with in situ formed α,β-unsaturated imines for the preparation of indole-fused tricyclic rings has been reported. This strategy involves a sequential addition/rebound addition process of vinyl diazoacetates and an in situ dedinitrogenation. This annulation protocol features low-cost catalysts, mild reaction conditions, and facilely prepared substrates.
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Affiliation(s)
- Qin Jiang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Ting Yang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Qi Li
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Guang-Ming Liang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Yong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Cheng-Yu He
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Wen-Dao Chu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
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6
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Zhu J, Li J, Zhang L, Sun S, Wang Z, Li X, Yang L, Cheng M, Lin B, Liu Y. Quantum Mechanical Prediction and Experimental Verification of Au(I)-Catalyzed Substitution-Controlled Syntheses of 1 H-Pyrido[4,3- b]indole and Spiro[indoline-3,3'-pyridine] Derivatives. J Org Chem 2023; 88:5483-5496. [PMID: 37043684 DOI: 10.1021/acs.joc.2c03104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Density functional theory calculations were applied to predict the pathways of gold(I)-catalyzed cycloisomerization of the indole substrates with 1,6-enynes, which were consistent with the ensuing experimental results. The substitution-controlled synthesis led to the formation of 1H-pyrido[4,3-b]indole and spiro[indoline-3,3'-pyridine] derivatives in a tunable way. The reactions had good functional group tolerances, and a possible mechanism was proposed based on the computational and experimental results.
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Affiliation(s)
- Jiang Zhu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Jiaji Li
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lianjie Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Shitao Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Zhaobo Wang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Xiang Li
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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7
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Sun S, Hao J, Cheng M, Liu Y, Lin B. Computational insight into gold(I)-catalyzed intramolecular regioselectivity of tryptamine-ynamide cycloisomerizations. Org Biomol Chem 2023; 21:2610-2619. [PMID: 36896738 DOI: 10.1039/d3ob00079f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
The regioselectivity for gold(I)-catalyzed intramolecular cycloisomerizations of tryptamine-ynamides has long been elusive despite various synthetic examples of similar substrates being available. Computational studies were carried out to provide insight into the mechanisms and the origin of the substrate-dependent regioselectivity of these transformations. Based on the analyses of non-covalent interactions, distortion/interaction, and energy decomposition on the interactions between the terminal substituent of alkynes and the gold(I) catalytic ligand, the electrostatic effect was determined to be the key factor for α-position selectivity while the dispersion effect was determined to be the key factor for β-position selectivity. Our computational results were consistent with the experimental observations. This study provides useful guidance for understanding other similar gold(I)-catalyzed asymmetric alkyne cyclization reactions.
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Affiliation(s)
- Shitao Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Jinle Hao
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
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8
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Sugimoto K, Mori I, Kato T, Yasui K, Xu B, Tan CH, Odagi M, Nagasawa K. Guanidinium Hypoiodite-Catalyzed Intramolecular Oxidative Coupling Reaction of Oxindoles with β-Dicarbonyls. J Org Chem 2023. [PMID: 36702628 DOI: 10.1021/acs.joc.2c02500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Spiro[indoline-3,4'-piperidine] is a fundamental motif present in various biologically active compounds. Here, we report an intramolecular oxidative coupling reaction of oxindoles with β-dicarbonyls in the presence of a guanidinium hypoiodite catalyst, providing spiro-coupling products in moderate to excellent yields. Furthermore, a chiral hypoiodite catalyst derived from the chiral guanidinium organocatalyst is effective for the challenging asymmetric carbon-carbon bond-forming reaction, affording optically active spiro[indoline-3,4'-piperidines].
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Affiliation(s)
- Kota Sugimoto
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Io Mori
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Takanari Kato
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Koji Yasui
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Ban Xu
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Choon Hong Tan
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Minami Odagi
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei, Tokyo 184-8588, Japan
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9
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Xiao JA, Peng H, Zhang H, Meng RF, Lin C, Su W, Huang Y. Synergistic Sc(III)/Au(I)-Catalyzed Dearomative Spiroannulation of 2-(Ethynyl)aryl Cyclopropanes with 2-Aryl Indoles. Org Lett 2022; 24:8709-8713. [DOI: 10.1021/acs.orglett.2c03679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jun-An Xiao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Hai Peng
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Huan Zhang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Ru-Fang Meng
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Chenxiang Lin
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Wei Su
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
| | - Yanmin Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Nanning Normal University, Nanning 530001, P.R. China
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10
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Chen Y, Wang Z, Zhao W, Sun S, Yang L, Zhang J, Zhang D, Cheng M, Lin B, Liu Y. Ag(I)/PPh 3-catalyzed diastereoselective syntheses of spiro[indole-3,4'-piperidine] derivatives via cycloisomerizations of tryptamine-ynamides. Chem Commun (Camb) 2022; 58:3051-3054. [PMID: 35165679 DOI: 10.1039/d1cc07298f] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A Ag(I)/PPh3-catalyzed chelation-controlled cycloisomerization of tryptamine-ynamide was developed to access the spiro[indole-3,4'-piperidine] scaffold in a racemic and diastereoselective manner. The diastereoselective products were achieved by a chiron approach. Density functional theory (DFT) calculations indicated that strong non-covalent effects between the substrate and catalyst/ligand complex stabilized the spiroindoleninium intermediate via cation-π-π interactions.
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Affiliation(s)
- Yanyu Chen
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Zhaobo Wang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Wutong Zhao
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.
| | - Shitao Sun
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Junpeng Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Di Zhang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Bin Lin
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China. .,Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China.,Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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11
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Li Y, Zhou Y, Zhang J, Liu R, Zhao X, Wang Y. A DFT Study on Gold-Catalyzed Domino Cyclization for Post-Ugi Synthesis of Spiroindolines: Insights on the Origin of Remarkable Diastereoselectivity. Catal Sci Technol 2022. [DOI: 10.1039/d1cy01453f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a comprehensive DFT study on gold-catalyzed domino cyclization to spiroindolines. The diastereoselectivity was analyzed based on the established coordination spheres. These computational results not only explain the origin...
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12
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WANG W, Zou PS, PANG L, LEI R, HUANG ZY, Chen NY, Mo DL, Pan C, SU GF. Synthesis of Spiroindolenine-3,3'-pyrrolo[2,1-b]quinazolinones through Gold(I)-Catalyzed Dearomative Cyclization of N-Alkynyl Quinazolinone-Tethered Indoles. Org Biomol Chem 2022; 20:2069-2074. [DOI: 10.1039/d1ob02492b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of functionalized spiroindolenine-3,3'-pyrrolo[2,1-b]quinazolinones were prepared in good to excellent yields through a gold(I)-catalyzed dearomative cyclization of N-alkynyl quinazolinone-tethered C2-substituted indoles. The reaction features broad substrate scope, good functional...
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13
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Qin H, Xie Q, HE LONG. Synthesis of Spiroindolenine Bearing Chroman Scaffolds Based on Cylization Reaction to para-Methylated Methides. NEW J CHEM 2022. [DOI: 10.1039/d2nj00936f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient diastereoselective cyclization reaction of ortho-hydroxyphenyl-substituted para-quinone methides with α,β-unsaturated imines generated in situ from aryl sulfonyl indoles was developed, which afforded spiroindolenine bearing chroman scaffolds in good to...
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14
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Karatavuk AO. One-pot gold(I)-catalyzed synthesis of 2-pyridonyl alcohols. Org Biomol Chem 2021; 19:10617-10621. [PMID: 34874032 DOI: 10.1039/d1ob01950c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A highly efficient method for the synthesis of 2-pyridonyl alcohols via gold(I) catalyst was developed. The effect of methanesulfonic acid on the reaction progression with the gold catalyst was determined. The proposed mechanism involves intramolecular cyclization product formation derived from 5-exo-dig and 6-exo-dig addition of the nitrogen for 2-propargyloxypyridine and 2-(but-3-yn-1-yloxy)pyridine, respectively. The pyridinium salt formed by the gold(I) catalyst and methanesulfonic acid undergoes a rearrangement reaction in a weakly basic medium (5% aq. Na2CO3) to form N-alkenyl pyridonyl alcohols. N-alkenyl pyridonyl alcohols can be obtained in moderate to excellent yields using this method.
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Affiliation(s)
- Ali Osman Karatavuk
- Trakya University, Faculty of Science, Department of Chemistry, Edirne, 22030, Turkey.
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15
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Wang W, Chen N, Zou P, Pang L, Mo D, Pan C, Su G. Gold(I)‐Catalyzed Selective Cyclization and 1,2‐Shift to Prepare Pseudorutaecarpine Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Wang Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Nan‐Ying Chen
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Pei‐Sen Zou
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Li Pang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Dong‐Liang Mo
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Cheng‐Xue Pan
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
| | - Gui‐Fa Su
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Collaborative Innovation Center for Guangxi Ethnic Medicine School of Chemistry and Pharmaceutical Sciences Guangxi Normal University 15 Yu Cai Road Guilin 541004 People's Republic of China
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16
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Xie JH, Zheng C, You SL. Palladium-Catalyzed Dearomative Methoxyallylation of 3-Nitroindoles with Allyl Carbonates. Angew Chem Int Ed Engl 2021; 60:22184-22188. [PMID: 34273125 DOI: 10.1002/anie.202107139] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Indexed: 01/18/2023]
Abstract
Herein we report a Pd-catalyzed dearomative methoxyallylation of 3-nitroindoles with readily available allyl carbonates. Good yields (up to 86 %) and diastereoselectivity (up to >20:1 dr) are obtained for a wide range of substrates. The compatibility of gram-scale synthesis and the relatively low catalyst loading (down to 1 mol % of [Pd]) enhance the practicality of this method. The kinetic experiments indicate that the rate-determining step of this reaction is the nucleophilic attack of the alkoxide anion.
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Affiliation(s)
- Jia-Hao Xie
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Chao Zheng
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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17
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Palladium‐Catalyzed Dearomative Methoxyallylation of 3‐Nitroindoles with Allyl Carbonates. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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18
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Ueda J, Harada S, Kobayashi M, Yanagawa M, Nemoto T. Maleic Acid/Thiourea‐Catalyzed Dearomative
ipso
‐Friedel–Crafts Reaction of Indoles to Produce Functionalized Spiroindolenines. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jun Ueda
- Graduate School of Pharmaceutical Sciences Chiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences Chiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Mayu Kobayashi
- Graduate School of Pharmaceutical Sciences Chiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Mai Yanagawa
- Graduate School of Pharmaceutical Sciences Chiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences Chiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research Center Chiba University 1-33, Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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19
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Mei L, Moutet J, Stull SM, Gianetti TL. Synthesis of CF 3-Containing Spirocyclic Indolines via a Red-Light-Mediated Trifluoromethylation/Dearomatization Cascade. J Org Chem 2021; 86:10640-10653. [PMID: 34255497 DOI: 10.1021/acs.joc.1c01313] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A red-light-mediated nPr-DMQA+-catalyzed cascade intramolecular trifluoromethylation and dearomatization of indole derivatives with Umemoto's reagent has been developed. This protocol provides a facile and efficient approach for the construction of functionalized and potentially biologically important CF3-containing 3,3-spirocyclic indolines with moderate to high yields and excellent diastereoselectivities under mild conditions. The success of multiple gram-scale (1 and 10 g) experiments further highlights the robustness and practicality of this protocol and the merit of the employment of red light. Mechanistic studies support the formation of a crucial CF3 radical species and a dearomatized benzyl carbocation intermediate.
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Affiliation(s)
- Liangyong Mei
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Jules Moutet
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Savannah M Stull
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Thomas L Gianetti
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
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20
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Chen G, Liu PY, Zou H, Hu J, Fang X, Xu D, He YP, Wei H, Xie W. Au(I)-Catalyzed Domino Cyclization of 1,6-Diynes Incorporated with Indole. Org Lett 2021; 23:2279-2284. [PMID: 33667106 DOI: 10.1021/acs.orglett.1c00411] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We disclose herein a Au(I)-catalyzed domino cyclization of 1,6-diynes incorporated with indole. This protocol enabled the diastereoselective buildup of indole-fused azabicyclo[3.3.1]nonanes from linear precursors. Density functional theory calculations showed that the reaction proceeded via an unprecedented cascade dearomatization/rearomatization/dearomatization process. Independent gradient model analysis revealed that a noncovalent attractive interaction between the distal alkyne and the Au/proximal complex was responsible for the chemoselectivity of the first spirocyclization step.
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Affiliation(s)
- Guzhou Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Peng-Yu Liu
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Huanhuan Zou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Jiadong Hu
- Yangling Vocational & Technical College, Yangling District, Xianyang, Shaanxi, China
| | - Xiaowu Fang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Dongyang Xu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Yu-Peng He
- Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Shihua University, Dandong Road West 1, Fushun 113001, China
| | - Hongbo Wei
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.,Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Yangling, Shaanxi 712100, China
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21
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Li XS, Xu DT, Niu ZJ, Li M, Shi WY, Wang CT, Wei WX, Liang YM. Gold-Catalyzed Tandem Annulations of Pyridylhomopropargylic Alcohols with Propargyl Alcohols. Org Lett 2021; 23:832-836. [PMID: 33507087 DOI: 10.1021/acs.orglett.0c04070] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A gold-catalyzed tandem annulation of propargylic alcohols and pyridylhomopropargylic alcohols is achieved, providing an atom-economical approach to a diverse set of polycyclic dihydrobenzofurans in good yields. The reaction proceeds via the 5-endo-dig cyclization/Meyer-Schuster rearrangement/Friedel-Crafts-type pathway. In this way, three C-C bonds and one C-O bond form to give a polycyclic skeleton in a one-pot process. Moreover, the products exhibit unique optical properties, which reveal their potential application value.
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Affiliation(s)
- Xue-Song Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Dan-Tong Xu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Jie Niu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Ming Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Wei-Yu Shi
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Cui-Tian Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Wan-Xu Wei
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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22
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Mirzaei A, Turczel G, Nagyházi M, Farkas V, Balla Á, Dang Vu H, Tuba R. Cyclative MCRs of Azines and Azinium Salts. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001048] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Anvar Mirzaei
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
- Department of Chemistry Faculty of Science Islamic Azad University Sanandaj Branch Iran
| | - Gábor Turczel
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
| | - Márton Nagyházi
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
| | - Vajk Farkas
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
| | - Áron Balla
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
| | - Hai Dang Vu
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
| | - Robert Tuba
- Research Centre for Natural Sciences Institute of Materials and Environmental Chemistry Magyar tudósok körútja 2, P.O. Box 286 1519 Budapest Hungary
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23
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Bag D, Sawant SD. Heteroarene-tethered Functionalized Alkyne Metamorphosis. Chemistry 2021; 27:1165-1218. [PMID: 32603015 DOI: 10.1002/chem.202002154] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Indexed: 12/11/2022]
Abstract
Heteroarene-tethered functionalized alkynes are multipotent synthons in organic chemistry. This detailed Review described herein offers a thorough discussion of the metamorphosis of heteroarene-tethered functionalized alkynes, an area which has earned much attention over the past decade in the straightforward synthesis of architecturally complex heterocyclic scaffolds in atom and step economic manner. Depending upon the variety of functionalized alkynes, this Review is divided into multiple sections. Amongst the vast array of synthetic transformations covered, dearomatizing spirocyclizations and cascade spirocyclization/rearrangement are of great interest. Synthetic transformations involving the heteroarene-tethered functionalized alkynes with scope, challenges, limitations, mechanism, their application in the total synthesis of natural products and future perceptions are surveyed.
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Affiliation(s)
- Debojyoti Bag
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
| | - Sanghapal D Sawant
- Laboratory 212, Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Canal Road, Jammu, Jammu and Kashmir, 180001, India
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24
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Silica gel-promoted synthesis of multisubstituted spiroindolenines from tryptamines and γ-chloro-α,β-unsaturated ketones. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Li Y, Zhao X. Importance of Counterions in Gold‐hydrogen Bonding Cooperative Catalytic Approach to Spirocyclic Rings: Insights on Mechanism and Origins. ChemCatChem 2020. [DOI: 10.1002/cctc.202001303] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics School of Chemistry State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an 710049 P.R. China
| | - Xiang Zhao
- Institute for Chemical Physics School of Chemistry State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi'an Jiaotong University Xi'an 710049 P.R. China
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26
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Gao X, Yuan Y, Xie X, Zhang Z. Visible-light-induced cascade dearomatization cyclization between alkynes and indole-derived bromides: a facile strategy to synthesize spiroindolenines. Chem Commun (Camb) 2020; 56:14047-14050. [PMID: 33103670 DOI: 10.1039/d0cc05672c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A visible-light-initiated intermolecular dearomatization cyclization cascade reaction between alkynes and indole-derived bromides has been explored. This transformation exhibits a wide substrate scope and significant functional group tolerance, providing an efficient way to access a variety of spiroindolenines under mild conditions.
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Affiliation(s)
- Xiaoshuang Gao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
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27
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Homma H, Harada S, Ito T, Kanda A, Nemoto T. Atypical Dearomative Spirocyclization of β-Naphthols with Diazoacetamides Using a Silver Catalyst. Org Lett 2020; 22:8132-8138. [PMID: 33026816 DOI: 10.1021/acs.orglett.0c03110] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A chemoselective dearomatization of the less reactive benzenoid unit in β-naphthol was developed. Spirocyclization with a reductant constructs a pivotal structure for drug candidates. One-pot oxidative conversion enabled the tandem dearomatization of β-naphthol, producing conjugated tetraenone variants. The potential utility of the product as an F--selective anion sensor was also demonstrated. Theoretical studies revealed the intermediacy of silver-carbenoid species leading to chemoselective spirocyclization over arene cyclopropanation.
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Affiliation(s)
- Haruka Homma
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tsubasa Ito
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Ayaka Kanda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan.,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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28
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Li Y, Zhao X. Assessing counterion effects in gold-catalyzed domino spirocyclization: an industrial perspective on hydrogen bonding. Phys Chem Chem Phys 2020; 22:19606-19612. [PMID: 32936160 DOI: 10.1039/d0cp03367g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We herein report a computational study of the hydrogen bonding in gold-catalyzed ipso-cyclization to diverse polyheterocyclic frameworks. The different roles of these hydrogen bonds are analyzed for the different ipso-cyclization reactions. The fine-tunability of the electronic as well as steric properties of gold counterions contributed substantially to the popularity of the dearomatization reaction, with robust applications in total synthesis and gold catalysis. We have found correlation between the hydrogen bonding parameters and chemoselectivity in gold-catalyzed spirocyclization, playing critical roles in determining the reaction direction of counterion-based enantioselective gold catalysis. The expanded use of counterions via hydrogen bonding interaction can occupy an important role in the future concerning catalyst optimization in gold catalysis.
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Affiliation(s)
- Yunhe Li
- Institute for Chemical Physics & Department of Chemistry, School of Science, State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Xiang Zhao
- Institute for Chemical Physics & Department of Chemistry, School of Science, State Key Laboratory of Electrical Insulation and Power Equipment & MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China.
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29
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Zhang YX, Chen LY, Sun JT, Si CM, Wei BG. Gold-Catalyzed Addition–N-Boc Cleavage–Cyclization of N,O-Acetal with Ynamides for Construction of 6-(tert-Butyldimethylsilyl)oxy-tetrahydropyrrolo[1,2-c][1,3]oxazin-1-ones. J Org Chem 2020; 85:12603-12613. [DOI: 10.1021/acs.joc.0c01776] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yan-Xue Zhang
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Ling-Yan Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Jian-Ting Sun
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai 201620, China
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Chang-Mei Si
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Bang-Guo Wei
- Department of Natural Medicine, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
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30
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McLean EB, Cutolo FM, Cassidy OJ, Burns DJ, Lee AL. Selectivity Control in Gold-Catalyzed Hydroarylation of Alkynes with Indoles: Application to Unsymmetrical Bis(indolyl)methanes. Org Lett 2020; 22:6977-6981. [PMID: 32845648 DOI: 10.1021/acs.orglett.0c02526] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Gold-catalyzed hydroarylation of unactivated alkynes with indoles have previously been reported to proceed with double indole addition to produce symmetrical bis(indolyl)methanes (BIMs). We demonstrate for the first time that the selectivity of the gold-catalyzed reaction can be fully switched to allow for isolation of the vinylindole products instead. Furthermore, this selective reaction can be utilized to synthesize the more difficult to access unsymmetrical BIMs from readily available starting materials.
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Affiliation(s)
- Euan B McLean
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, U.K
| | - Francesca M Cutolo
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, U.K
| | - Orla J Cassidy
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, U.K
| | - David J Burns
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | - Ai-Lan Lee
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, U.K
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31
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Ueda J, Harada S, Kanda A, Nakayama H, Nemoto T. Silver-Catalyzed, Chemo- and Enantioselective Intramolecular Dearomatization of Indoles to Access Sterically Congested Azaspiro Frameworks. J Org Chem 2020; 85:10934-10950. [PMID: 32692554 DOI: 10.1021/acs.joc.0c01580] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An asymmetric dearomatization of indoles bearing α-diazoacetamide functionalities was developed for synthesizing high-value spiro scaffolds. A silver phosphate chemoselectively catalyzed the sterically challenging dearomatization, whereas more typically used metal catalysts for carbene transfer reactions, such as a rhodium complex, were not effective and instead resulted in a Büchner ring expansion or cyclopropanation. Mechanistic studies indicated that the spirocyclization occurred through a silver-assisted asynchronous concerted process and not via a silver-carbene intermediate. Analyses based on natural bond orbital population and a distortion/interaction model indicated that the degree of C-Ag mutual interaction is crucial for achieving a high level of enantiocontrol. In addition, an oxidative disconnection of a C(sp3)-C(sp2) bond in the product provided unconventional access to the corresponding chiral spirooxindole.
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Affiliation(s)
- Jun Ueda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Ayaka Kanda
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Hiroki Nakayama
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan.,Molecular Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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32
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Magné V, Sanogo Y, Demmer CS, Retailleau P, Marinetti A, Guinchard X, Voituriez A. Chiral Phosphathiahelicenes: Improved Synthetic Approach and Uses in Enantioselective Gold(I)-Catalyzed [2 + 2] Cycloadditions of N-Homoallenyl Tryptamines. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01819] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Valentin Magné
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Youssouf Sanogo
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Charles S. Demmer
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Angela Marinetti
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Xavier Guinchard
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Arnaud Voituriez
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR 2301, 91198 Gif-sur-Yvette, France
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33
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Sabat N, Soualmia F, Retailleau P, Benjdia A, Berteau O, Guinchard X. Gold-Catalyzed Spirocyclization Reactions of N-Propargyl Tryptamines and Tryptophans in Aqueous Media. Org Lett 2020; 22:4344-4349. [PMID: 32396378 DOI: 10.1021/acs.orglett.0c01370] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
N-Propargyl tryptamine and tryptophan derivatives that are readily available from both synthetic and biocatalytic approaches undergo gold-catalyzed dearomative cyclizations in aqueous media to the corresponding spirocyclic derivatives. In addition to the efficiency of the method, operating in aqueous media affords a selective entry to C2-unsubstituted spiroindolenines that have long remained unattainable by Au(I) catalysis. Moderate to excellent yields of the desired spirocyclic products bearing various substituents were obtained.
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Affiliation(s)
- Nazarii Sabat
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Feryel Soualmia
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, ChemSyBio, 78350 Jouy-en-Josas, France
| | - Pascal Retailleau
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Alhosna Benjdia
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, ChemSyBio, 78350 Jouy-en-Josas, France
| | - Olivier Berteau
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, ChemSyBio, 78350 Jouy-en-Josas, France
| | - Xavier Guinchard
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
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34
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Alshreimi AS, Zhang G, Reidl TW, Peña RL, Koto N, Islam SM, Wink DJ, Anderson LL. Synthesis of Spirocyclic 1‐Pyrrolines from Nitrones and Arynes through a Dearomative [3,3′]‐Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2020; 59:15244-15248. [DOI: 10.1002/anie.202004652] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/30/2020] [Indexed: 01/21/2023]
Affiliation(s)
- Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Ricardo L. Peña
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Nicholas‐George Koto
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
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35
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Alshreimi AS, Zhang G, Reidl TW, Peña RL, Koto N, Islam SM, Wink DJ, Anderson LL. Synthesis of Spirocyclic 1‐Pyrrolines from Nitrones and Arynes through a Dearomative [3,3′]‐Sigmatropic Rearrangement. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004652] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Abdullah S. Alshreimi
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Guanqun Zhang
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Tyler W. Reidl
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Ricardo L. Peña
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Nicholas‐George Koto
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Shahidul M. Islam
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Donald J. Wink
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
| | - Laura L. Anderson
- Department of Chemistry University of Illinois at Chicago 845 W Taylor Street Chicago IL USA
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36
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Rajesh M, Kumar R, Puri S, Nanubolu JB, Reddy MS. Lewis-Acid-Catalyzed Decarboxylative Annulation of 2-Aminoindole-3-Carboxylate with Ynals Involving [3 + 2] Spirocycloaddition and 2,3-Aza Migration. Org Lett 2020; 22:1117-1123. [DOI: 10.1021/acs.orglett.9b04626] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Manda Rajesh
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | | | | | | | - Maddi Sridhar Reddy
- Department of OSPC, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research, New Delhi, India
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37
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Reddy MVK, Anusha G, Reddy PVG. Sterically enriched bulky 1,3-bis(N,N′-aralkyl)benzimidazolium based Pd-PEPPSI complexes for Buchwald–Hartwig amination reactions. NEW J CHEM 2020. [DOI: 10.1039/d0nj01294g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A simple and efficient synthesis of a series of unexisting Pd-PEPPSI complexes is summarized. These complexes are exploited for their high catalytic activity towards Buchwald–Hartwig amination.
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38
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Alfano AI, Zampella A, Novellino E, Brindisi M, Lange H. Harnessing interrupted Fischer in continuous flow: sustainable synthesis of (spiro)indolenine and (spiro)indoline privileged scaffolds. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00329h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
3,3-Disubstituted indolenines are obtained via a green and sustainable flow chemistry protocol for interrupted Fischer indolisation reactions.
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Affiliation(s)
- Antonella Ilenia Alfano
- SPOTS-LAB – Sustainable Pharmaceutical and Organic Technology and Synthesis Laboratory
- Department of Pharmacy
- University of Naples ‘Federico II’
- 80131 Naples
- Italy
| | - Angela Zampella
- SPOTS-LAB – Sustainable Pharmaceutical and Organic Technology and Synthesis Laboratory
- Department of Pharmacy
- University of Naples ‘Federico II’
- 80131 Naples
- Italy
| | - Ettore Novellino
- SPOTS-LAB – Sustainable Pharmaceutical and Organic Technology and Synthesis Laboratory
- Department of Pharmacy
- University of Naples ‘Federico II’
- 80131 Naples
- Italy
| | - Margherita Brindisi
- SPOTS-LAB – Sustainable Pharmaceutical and Organic Technology and Synthesis Laboratory
- Department of Pharmacy
- University of Naples ‘Federico II’
- 80131 Naples
- Italy
| | - Heiko Lange
- SPOTS-LAB – Sustainable Pharmaceutical and Organic Technology and Synthesis Laboratory
- Department of Pharmacy
- University of Naples ‘Federico II’
- 80131 Naples
- Italy
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