1
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Chen C, Chen J, Wang H, Xu ZF, Duan S, Li CY. Catalyst-Free Synthesis of Polycyclic Spiroindolines by Cascade Reaction of 3-(2-Isocyanoethyl)indoles with 1-Sulfonyl-1,2,3-triazoles. J Org Chem 2023. [PMID: 37307412 DOI: 10.1021/acs.joc.3c00800] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A catalyst-free cascade reaction of 3-(2-isocyanoethyl)indoles and 1-sulfonyl-1,2,3-triazoles was realized. This dearomative spirocyclization provided an efficient protocol to synthesize a series of polycyclic indolines bearing spiro-α-carboline in moderate to high yields in one step under thermal reaction conditions.
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Affiliation(s)
- Cong Chen
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jing Chen
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Han Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ze-Feng Xu
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Shengguo Duan
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Chuan-Ying Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
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2
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Zhao J, Carbone J, Farruggia G, Janecka A, Gentilucci L, Calonghi N. Synthesis and Antiproliferative Activity against Cancer Cells of Indole-Aryl-Amide Derivatives. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010265. [PMID: 36615458 PMCID: PMC9822155 DOI: 10.3390/molecules28010265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/16/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022]
Abstract
Indoles constitute a large family of heterocyclic compounds widely occurring in nature which are present in a number of bioactive natural and synthetic compounds, including anticancer agents or atypical opioid agonists. As a result, exponential increases in the development of novel methods for the synthesis of indole-containing compounds have been reported in the literature. A series of indole-aryl amide derivatives 1-7 containing tryptamine or an indolylacetic acid nucleus were designed, synthesized, and evaluated as opioid ligands. These new indole derivatives showed negligible to very low affinity for μ- and δ-opioid receptor (OR). On the other hand, compounds 2, 5 and 7 showed Ki values in the low μM range for κ-OR. Since indoles are well known for their anticancer potential, their effect against a panel of tumor cell lines was tested. The target compounds were evaluated for their in vitro cytotoxicity in HT29, HeLa, IGROV-1, MCF7, PC-3, and Jurkat J6 cells. Some of the synthesized compounds showed good activity against the selected tumor cell lines, with the exception of IGROV1. In particular, compound 5 showed a noteworthy selectivity towards HT29 cells, a malignant colonic cell line, without affecting healthy human intestinal cells. Further studies revealed that 5 caused the cell cycle arrest in the G1 phase and promoted apoptosis in HT29 cells.
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Affiliation(s)
- Junwei Zhao
- Department of Chemistry “G. Ciamician”, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Jacopo Carbone
- Department of Chemistry “G. Ciamician”, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Giovanna Farruggia
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
| | - Anna Janecka
- Department of Biomolecular Chemistry, Medical University of Lodz, Mazowiecka 6/8, 92-215 Lodz, Poland
| | - Luca Gentilucci
- Department of Chemistry “G. Ciamician”, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- Correspondence: (L.G.); (N.C.); Tel.: +39-05-1209-9570 (L.G.); +39-05-1209-1231 (N.C.)
| | - Natalia Calonghi
- Department of Pharmacy and Biotechnology (FaBiT), University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
- Correspondence: (L.G.); (N.C.); Tel.: +39-05-1209-9570 (L.G.); +39-05-1209-1231 (N.C.)
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3
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Zhang Z, Chen Y, He L, Xie L, Chen Z. Regioselective Synthesis of Indole-Fused Seven-Membered N-Heterocycles via Photoredox-Catalyzed Intramolecular Cyclization. J Org Chem 2022; 87:14394-14406. [PMID: 36206145 DOI: 10.1021/acs.joc.2c01829] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein, we describe the construction of indole-fused seven-membered N- and O-heterocycles from indolyl α-diazocarbonyls via photoredox-catalyzed intramolecular cyclization. The photoredox process features operational simplicity, mild conditions, and as low as 0.1 mol % catalyst loading. The tricyclic heterocycles are obtained in yields of 24 to 67% with excellent regioselectivity. The practicality of this protocol is further demonstrated by gram-scale reactions carried out in both batch and continuous flow.
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Affiliation(s)
- Ziqin Zhang
- School of Pharmacy, Fujian Medical University, Fuzhou 350122, China
| | - Yifeng Chen
- School of Pharmacy, Fujian Medical University, Fuzhou 350122, China
| | - Linrong He
- School of Pharmacy, Fujian Medical University, Fuzhou 350122, China
| | - Lihua Xie
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou 350122, China
| | - Zhitao Chen
- Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, School of Pharmacy, Fujian Medical University, Fuzhou 350122, China
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4
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Dong P, Li Z, Liu X, Dong S, Feng X. Asymmetric synthesis of polycyclic spiroindolines via the Dy-catalyzed cascade reaction of 3-(2-isocyanoethyl)indoles with aziridines. Org Chem Front 2022. [DOI: 10.1039/d2qo00874b] [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
An asymmetric cascade reaction catalyzed by a chiral N,N′-dioxide–Dy(iii) complex was realized to construct the valuable [6,5,5,6] tetracyclic spiroindolines with good yields and enantioselectivities by a concise and one-step protocol.
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Affiliation(s)
- Pei Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Zhaojing Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shunxi Dong
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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5
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Lin X, Zhao C, Wang D, Wu G, Chen G, Chen S, Ren H, Deng D, Xu Y, Hu X, Liu Y. BiCl
3
‐Mediated Tandem Cyclization of Tryptamine‐Derived Ynamide: Concise Synthesis of Pentacyclic Spiroindolines and Tricyclic Indole Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiao‐Tong Lin
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Cheng Zhao
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Da‐Ru Wang
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Guang‐Cheng Wu
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Guo‐Shu Chen
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Shu‐Jie Chen
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Hai Ren
- State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014 People's Republic of China
| | - Dong‐Sheng Deng
- College of Chemistry and Chemical Engineering Luoyang Normal University Luoyang 471934 People's Republic of China
| | - Yi‐Bing Xu
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Xiao‐Wei Hu
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
| | - Yun‐Lin Liu
- School of Chemistry and Chemical Engineering Guangzhou University 230 Wai Huan Xi Road, Guangzhou Higher Education Mega Center Guangzhou 510006 People's Republic of China
- State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Guiyang 550014 People's Republic of China
- Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 People's Republic of China
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6
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Zhang J, Xia W, Qu M, Huda S, Ward JS, Rissanen K, Albrecht M. Synthesis of Polycyclic Indolines by Utilizing a Reduction/Cyclization Cascade Reaction. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jingyu Zhang
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 Aachen 52074 Germany
| | - Wei Xia
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 Aachen 52074 Germany
| | - Meilin Qu
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 Aachen 52074 Germany
| | - Saskia Huda
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 Aachen 52074 Germany
| | - Jas S. Ward
- University of Jyvaskyla Department of Chemistry P.O. Box 35 Jyväskylä Finland
| | - Kari Rissanen
- University of Jyvaskyla Department of Chemistry P.O. Box 35 Jyväskylä Finland
| | - Markus Albrecht
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 Aachen 52074 Germany
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7
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Wang L, Han H, Gu L, Zhang W, Zhao J, Wang Q. Skeletal remodeling of chalcone-based pyridinium salts to access isoindoline polycycles and their bridged derivatives. Chem Sci 2021; 12:15389-15398. [PMID: 34976360 PMCID: PMC8635221 DOI: 10.1039/d1sc05741c] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 11/05/2021] [Indexed: 12/12/2022] Open
Abstract
Simultaneous deconstructive ring-opening and skeletal reconstruction of an inert, aromatic pyridinium ring is of great importance in synthetic communities. However, research in this area is still in its infancy. Here, a skeletal re-modeling strategy was developed to transform chalcone-based pyridinium salts into structurally intriguing polycyclic isoindolines through a dearomative ring-opening/ring-closing sequence. Two distinct driving forces for the deconstruction of the pyridinium core were involved in these transformations. One was the unprecedented harnessing of the instability of in situ generated cyclic β-aminoketones, and the other was the instability of the resultant N,N-ketals. The desired isoindoline polycycles could undergo the Wittig reaction with various phosphorus ylides to achieve structural diversity and complexity. Notably, by tuning the Wittig conditions by addition of one equivalent of base, an additional bridged ring was introduced. A plausible mechanism was proposed on the basis of control experiments and theoretical calculations.
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Affiliation(s)
- Lele Wang
- College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
| | - Huabin Han
- College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
| | - Lijie Gu
- College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
| | - Wenjing Zhang
- Green Catalysis Center, College of Chemistry, Zhengzhou University Zhengzhou 450001 China
| | - Junwei Zhao
- College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
| | - Qilin Wang
- College of Chemistry and Chemical Engineering, Henan University Kaifeng 475004 China
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8
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Li H, Wu J, Zheng J, Li WDZ. Synthesis of polycyclic spiroindolines via the cascade reaction of 3-(2-isocyanoethyl)indoles. Chem Commun (Camb) 2021; 57:11092-11095. [PMID: 34617533 DOI: 10.1039/d1cc04576h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Tandem reactions of the yttrium(iii) catalyzed ring-opening reaction of 2,2'-diester aziridines with 3-(2-isocyanoethyl)indoles and the subsequent Friedel-Crafts/Mannich/desulfonylation were reported. A series of polycyclic spiroindolines containing tetrahydro-β-carbolines were obtained in moderate to excellent yields (56-92%) in one step under mild reaction conditions. A possible catalytic mechanism was also proposed.
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Affiliation(s)
- Haizhen Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Jinyu Wu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Jianfeng Zheng
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Wei-Dong Z Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
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9
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Zhao S, Sirasani G, Andrade RB. Aspidosperma and Strychnos alkaloids: Chemistry and biology. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2021; 86:1-143. [PMID: 34565505 DOI: 10.1016/bs.alkal.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Of Nature's nearly 3000 unique monoterpene indole alkaloids derived from tryptophan, those members belonging to the Aspidosperma and Strychnos families continue to impact the fields of natural products (i.e., isolation, structure determination, biosynthesis) and organic chemistry (i.e., chemical synthesis, methodology development) among others. This review covers the biological activity (Section 2), biosynthesis (Section 3), and synthesis of both classical and novel Aspidosperma (Section 4), Strychnos (Section 5), and selected bis-indole (Section 6) alkaloids. Technological advancements in genetic sequencing and bioinformatics have deepened our understanding of how Nature assembles these intriguing molecules. The proliferation of innovative synthetic strategies and tactics for the synthesis of the alkaloids covered in this review, which include contributions from over fifty research groups from around the world, are a testament to the creative power and technical skills of synthetic organic chemists. To be sure, Nature-the Supreme molecular architect and source of a dazzling array of irresistible chemical logic puzzles-continues to inspire scientists across multiple disciplines and will certainly continue to do so for the foreseeable future.
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Affiliation(s)
- Senzhi Zhao
- Department of Chemistry, Temple University, Philadelphia, PA, United States
| | | | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, PA, United States
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10
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Wang XF, Cao WB, Li HY, Xu XP, Ji SJ. Cascade Reaction of Tryptamine-Derived Isocyanides with Nitrile Oxides: Construction of Oxazine Fused-Spiroindoline Derivatives. J Org Chem 2021; 86:12597-12606. [PMID: 34463508 DOI: 10.1021/acs.joc.1c01054] [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
A one-step cascade reaction of tryptamine-derived isocyanides with in situ generated nitrile oxides for the synthesis of fused spiroindolines was described. The desired products could be efficiently synthesized in moderate to good yields (42-87%). The protocol features mild conditions, wide substrate scope, and high efficiency.
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Affiliation(s)
- Xiao-Feng Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Wen-Bin Cao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Hai-Yan Li
- Analysis and Testing Center, Soochow University, Suzhou 215123, China
| | - Xiao-Ping Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, P. R. China
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11
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Ji W, Wu HH, Li W, Zhang J. Copper-catalyzed cyclization reaction: synthesis of trifluoromethylated indolinyl ketones. Chem Commun (Camb) 2021; 57:4448-4451. [PMID: 33949475 DOI: 10.1039/d1cc00960e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A novel, simple, effective and rapid synthetic method to construct the C-2 trifluoromethylated indolinyl ketones via a copper-catalyzed cyclization reaction between N-alkylaniline and β-(trifluoromethyl)-α,β-unsaturated enones was developed. The results of the control experiments show that the reaction may involve a radical mechanism by a single-electron transfer process. Moreover, a broad substrate scope and good functional groups, high diastereoselectivities (dr, up to >20 : 1) as well as gram-scale synthesis make this approach highly attractive.
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Affiliation(s)
- Wangqin Ji
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China.
| | - Hai-Hong Wu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China.
| | - Wenbo Li
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China.
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, China.
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12
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Shoji T, Yamazaki A, Ariga Y, Uda M, Ando D, Sasahara N, Kai N, Ito S. Azulene-Substituted Donor-Acceptor Polymethines and 1,6'-Bi-, 1,6';3,6''-Ter-, and Quinqueazulenes via Zincke Salts: Synthesis, and Structural, Optical, and Electrochemical Properties. Chempluschem 2021; 86:946-966. [PMID: 33973729 DOI: 10.1002/cplu.202100174] [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: 04/15/2021] [Revised: 04/26/2021] [Indexed: 11/06/2022]
Abstract
Azulene-substituted donor-acceptor polymethines, bi-, ter-, and quinqueazulenes composed of the 1,6'-biazulene unit have been successfully prepared from corresponding Zincke salts. The synthesis of polymethines through the reaction of Zincke salts with several amines, followed by a Knoevenagel reaction with malononitrile, was accomplished in moderate to high yields (40-92 %). Meanwhile, the reaction of Zincke salts with secondary amines and the subsequent sequential condensation-cyclization with cyclopentadienide ions, so-called Ziegler-Hafner method, produced the corresponding 1,6'-biazulenes, 1,6';3,6''-terazulenes, and quinqueazulene, respectively. The structural, optical, and electrochemical properties of the azulene-substituted donor-acceptor polymethines, bi-, ter-, and quinqueazulenes were revealed by single-crystal X-ray structure analysis, UV/vis spectroscopy, voltammetry analysis, spectroelectrochemistry, and theoretical calculations. These results suggested that the substituents on the azulene ring and their substitution positions directly affect their reactivities, optical and electrochemical properties.
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Affiliation(s)
- Taku Shoji
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
- Department of Chemistry, Faculty of Science, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Akari Yamazaki
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Yukino Ariga
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Mayumi Uda
- Department of Material Science, Graduate School of Science and Technology, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Daichi Ando
- Department of Chemistry, Faculty of Science, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Nichika Sasahara
- Department of Chemistry, Faculty of Science, Shinshu University, Matsumoto, 390-8621, Nagano, Japan
| | - Naohito Kai
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, 036-8561, Aomori, Japan
| | - Shunji Ito
- Graduate School of Science and Technology, Hirosaki University, Hirosaki, 036-8561, Aomori, Japan
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13
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Löffler LE, Wirtz C, Fürstner A. Collective Total Synthesis of Casbane Diterpenes: One Strategy, Multiple Targets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015243] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung 45470 Mülheim/Ruhr Germany
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14
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Löffler LE, Wirtz C, Fürstner A. Collective Total Synthesis of Casbane Diterpenes: One Strategy, Multiple Targets. Angew Chem Int Ed Engl 2021; 60:5316-5322. [PMID: 33289954 PMCID: PMC7986786 DOI: 10.1002/anie.202015243] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Indexed: 11/29/2022]
Abstract
Of the more than 100 casbane diterpenes known to date, only the eponymous parent hydrocarbon casbene itself has ever been targeted by chemical synthesis. Outlined herein is a conceptually new approach that brings not a single but a variety of casbane derivatives into reach, especially the more highly oxygenated and arguably more relevant members of this family. The key design elements are a catalyst‐controlled intramolecular cyclopropanation with or without subsequent equilibration, chain extension of the resulting stereoisomeric cyclopropane building blocks by chemoselective hydroboration/cross‐coupling, and the efficient closure of the strained macrobicyclic framework by ring‐closing alkyne metathesis. A hydroxy‐directed catalytic trans‐hydrostannation allows for late‐stage diversity. These virtues are manifested in the concise total syntheses of depressin, yuexiandajisu A, and ent‐pekinenin C. The last compound turned out to be identical to euphorhylonal A, the structure of which had clearly been misassigned.
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Affiliation(s)
- Lorenz E Löffler
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Conny Wirtz
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470, Mülheim/Ruhr, Germany
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15
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Wang N, Jiang X. Synthetic Approaches to Tricyclic Aminoketones in the Total Synthesis of Aspidosperma and Kopsia Alkaloids. CHEM REC 2020; 21:295-314. [PMID: 33289266 DOI: 10.1002/tcr.202000131] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022]
Abstract
Aspidosperma and kopsia alkaloids are significant functional molecules because of their potent biological activities. Their intricate structures present an intrinsic synthetic challenge and thus attract significant attention from synthetic organic academic community. Over the past decades, a series of elegant strategies has been developed, in particular, the Stork's original Fischer indolization of tricyclic aminoketones 1. Herein, we report a comprehensive review on various synthetic approaches access to tricyclic aminoketones 1 and provide a practical guidance to readers whose are interested in employing tricyclic aminoketones 1 as versatile building blocks in the realm of total synthesis of aspidosperma, kopsia and structurally related alkaloids.
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Affiliation(s)
- Nengzhong Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, P. R. China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
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16
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Zhen L, Tong S, Zhu J, Wang MX. Fused N-Heterocycles with Contiguous Stereogenic Centers Accessed by an Asymmetric Catalytic Cascade Reaction of Tertiary Enamides. Chemistry 2020; 26:401-405. [PMID: 31602706 DOI: 10.1002/chem.201904596] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Indexed: 12/12/2022]
Abstract
We report in this article a cascade reaction strategy for the synthesis of complex N-heterocyclic compounds with contiguous and tetrasubstituted stereogenic carbons. Under the sequential catalysis of a chiral binol-Ti complex and BF3 , cyclopentanone-derived tertiary enamides undergo an enantioselective enamine addition to ketone carbonyls followed by diastereoselective trapping of the resulting acyliminiums by electron-rich aryl moieties to furnish four- and five-membered ring-fused N-heterocyclic products as the sole diastereomers in high yields with up to 99 % ee.
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Affiliation(s)
- Li Zhen
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, P. R. China
| | - Shuo Tong
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, P. R. China
| | - Jieping Zhu
- Laboratory of Synthesis and Natural products, Institute of Chemical Sciences and Engineering, Ecole Poltechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH 5304, 1015, Lausanne, Switzerland
| | - Mei-Xiang Wang
- Key Laboratory of Bioorganic Phosphorous and Chemical Biology (Ministry of Education), Tsinghua University, Beijing, 100084, P. R. China
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17
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He W, Wang P, Chen J, Xie W. Recent progress in the total synthesis of Strychnos alkaloids. Org Biomol Chem 2020; 18:1046-1056. [DOI: 10.1039/c9ob02627d] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The recent synthetic approaches toward Strychnos alkaloids are summarized, including novel synthetic methodologies and strategies.
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Affiliation(s)
- Weigang He
- School of Biology and Food Engineering
- Changshu Institute of Technology
- Changshu 215500
- China
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
| | - Pengyan Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- China
| | - Junhan Chen
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- China
| | - Weiqing Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling 712100
- China
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18
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Ying J, Gao Q, Wu XF. Site-Selective Carbonylative Synthesis of Structurally Diverse Lactams from Heterocyclic Amines with TFBen as the CO Source. J Org Chem 2019; 84:14297-14305. [DOI: 10.1021/acs.joc.9b02114] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Ying
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Qian Gao
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry, Zhejiang Sci-Tech University, Xiasha Campus, Hangzhou 310018, People’s Republic of China
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock, Albert-Einstein-Straβe 29a, Rostock 18059, Germany
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19
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He Y, Liu Z, Wu D, Li Z, Robeyns K, Van Meervelt L, Van der Eycken EV. Modular Access to Diverse Bridged Indole Alkaloid Mimics via a Gold-Triggered Cascade Dearomative Spirocarbocyclization/[4 + 2] Cycloaddition Sequence. Org Lett 2019; 21:4469-4474. [DOI: 10.1021/acs.orglett.9b01296] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yi He
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Zhen Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, 200237 Shanghai, China
| | - Danjun Wu
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, 310014 Hangzhou, China
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain, 1 Place Louis Pasteur, B-1348 Louvain-la-Neuve, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
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20
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Saya JM, Ruijter E, Orru RVA. Total Synthesis of
Aspidosperma
and
Strychnos
Alkaloids through Indole Dearomatization. Chemistry 2019; 25:8916-8935. [DOI: 10.1002/chem.201901130] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Jordy M. Saya
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Eelco Ruijter
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Romano V. A. Orru
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
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21
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Liu H, Wang SR, Song X, Zhao L, Wang L, Tang Y. Selectivity Switch in a Rhodium(II) Carbene Triggered Cyclopentannulation: Divergent Access to Three Polycyclic Indolines. Angew Chem Int Ed Engl 2019; 58:4345-4349. [DOI: 10.1002/anie.201812294] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 12/26/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Hua‐Kui Liu
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Sunewang R. Wang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Xiang‐Yang Song
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Liu‐Peng Zhao
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Lijia Wang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Yong Tang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
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22
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Lenci E, Trabocchi A. Smart Design of Small‐Molecule Libraries: When Organic Synthesis Meets Cheminformatics. Chembiochem 2019; 20:1115-1123. [DOI: 10.1002/cbic.201800751] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Elena Lenci
- Department of Chemistry “Ugo Schiff”University of Florence Via della Lastruccia 13 50019 Sesto Fiorentino Florence Italy
| | - Andrea Trabocchi
- Department of Chemistry “Ugo Schiff”University of Florence Via della Lastruccia 13 50019 Sesto Fiorentino Florence Italy
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23
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Han H, Yang SD, Xia JB. Pd/Cu Cocatalyzed Oxidative Tandem C-H Aminocarbonylation and Dehydrogenation of Tryptamines: Synthesis of Carbolinones. J Org Chem 2019; 84:3357-3369. [PMID: 30793907 DOI: 10.1021/acs.joc.8b03266] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The Pd/Cu cocatalyzed oxidative tandem C-H aminocarbonylation and dehydrogenation was developed, affording carbolinones with molecular oxygen as the terminal oxidant. Natural product strychnocarpine and its derivatives were prepared conveniently using this strategy.
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Affiliation(s)
- Hui Han
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) , University of Chinese Academy of Sciences, Chinese Academy of Sciences , Lanzhou 730000 , China.,State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , China
| | - Shang-Dong Yang
- State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , China
| | - Ji-Bao Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) , University of Chinese Academy of Sciences, Chinese Academy of Sciences , Lanzhou 730000 , China.,Key Laboratory of Organic Synthesis of Jiangsu Province , Suzhou 215123 , China
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24
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Liu H, Wang SR, Song X, Zhao L, Wang L, Tang Y. Selectivity Switch in a Rhodium(II) Carbene Triggered Cyclopentannulation: Divergent Access to Three Polycyclic Indolines. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812294] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hua‐Kui Liu
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Sunewang R. Wang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Xiang‐Yang Song
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Liu‐Peng Zhao
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Lijia Wang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
| | - Yong Tang
- The State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryUniversity of Chinese Academy of Sciences, CAS 345 Lingling Lu Shanghai 200032 China
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25
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Zheng Y, Yue BB, Wei K, Yang YR. Short Synthesis of the Monoterpene Indole Alkaloid (±)-Arbornamine. J Org Chem 2018; 83:4867-4870. [PMID: 29589936 DOI: 10.1021/acs.joc.8b00529] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first total synthesis of the monoterpene indole alkaloid (±)-arbornamine (1) has been completed, which proceeds in only 6 steps and 31% overall yield from three readily available, known compounds. The synthesis features a cascade involving a Pictet-Spengler cyclization/intramolecular ammonolysis to create the tetracyclic core of arbornamine (1) in a single chemical operation. The subsequent elaboration of 5 into 1 was effected by a key reductive Heck reaction and global reduction.
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Affiliation(s)
- Yu Zheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Bei-Bei Yue
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Kun Wei
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
| | - Yu-Rong Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , China
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26
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Li J, Ye Y, Zhang Y. Cycloaddition/annulation strategies for the construction of multisubstituted pyrrolidines and their applications in natural product synthesis. Org Chem Front 2018. [DOI: 10.1039/c7qo01077j] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Pyrrolidines are privileged substructures of numerous bioactive natural products and drugs.
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Affiliation(s)
- Jundong Li
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yilin Ye
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
| | - Yandong Zhang
- Department of Chemistry and Key Laboratory of Chemical Biology of Fujian Province
- iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
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27
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Cao B, Wei Y, Shi M. An atmosphere and light tuned highly diastereoselective synthesis of cyclobuta/penta[b]indoles from aniline-tethered alkylidenecyclopropanes with alkynes. Chem Commun (Camb) 2018; 54:2870-2873. [DOI: 10.1039/c8cc00180d] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst-free atmosphere and light tuned highly diastereoselective synthesis of cyclobuta/penta[b]indoles from aniline-tethered alkylidenecyclopropanes and alkynes was developed, which provided a wide range of cyclobuta- and cyclopenta[b]indole derivatives in good yields.
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Affiliation(s)
- Bo Cao
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
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28
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Liu YL, Mao XY, Lin XT, Chen GS. A Zn(OTf)2 catalyzed Ugi-type reaction of 3-(2-isocyanoethyl)indoles with indole-derived ketimines: rapid access to hexacyclic spiroindolines. Org Chem Front 2018. [DOI: 10.1039/c8qo00382c] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Zn(OTf)2 catalyzed Ugi-type reaction of 3-(2-isocyanoethyl)indoles and indole-derived ketimines was developed for the synthesis of hexacyclic spiroindolines featuring three stereocenters including two quaternary stereocenters.
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Affiliation(s)
- Yun-Lin Liu
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Xiang-Yu Mao
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Xiao-Tong Lin
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
| | - Guo-Shu Chen
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- China
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29
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Sowmiah S, Esperança JMSS, Rebelo LPN, Afonso CAM. Pyridinium salts: from synthesis to reactivity and applications. Org Chem Front 2018. [DOI: 10.1039/c7qo00836h] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review highlights the pyridinium salts in terms of their natural occurrence, synthesis, reactivity, biological properties, and diverse applications.
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Affiliation(s)
- Subbiah Sowmiah
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- Research Institute for Medicines (iMed.ULisboa)
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Luís P. N. Rebelo
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Carlos A. M. Afonso
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-009 Lisboa
- Portugal
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30
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D'Souza AM, Rivinoja DJ, Mulder RJ, White JM, Meyer AG, Hyland CJT, Ryan JH. Competitive 1,3-Dipolar Cycloaddition Reactions of an Azomethine Ylide with Aromatic and Carbonyl Groups of Nitro-Substituted Isatoic Anhydrides. Aust J Chem 2018. [DOI: 10.1071/ch18196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A study of the reactivity of a non-stabilised azomethine ylide, derived from N-(methoxymethyl)-N-(trimethylsilylmethyl)benzylamine, with nitro-substituted isatoic anhydrides was undertaken. N-Methyl-4-nitroisatoic anhydride underwent a 1,3-dipolar cycloaddition reaction exclusively at the isatoic anhydride C1-carbonyl group, followed by decarboxylative rearrangement to yield a benzo-1,3-diazepin-5-one derivative. In contrast, N-methyl-5-nitroisatoic anhydride underwent competing cycloaddition processes to the isatoic anhydride C1-carbonyl group and to the nitro-substituted aromatic ring. The dearomative addition reaction resulted in the formation of novel tetracyclic products.
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31
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Pitre SP, Scaiano JC, Yoon TP. Photocatalytic Indole Diels-Alder Cycloadditions Mediated by Heterogeneous Platinum-Modified Titanium Dioxide. ACS Catal 2017; 7:6440-6444. [PMID: 29104813 DOI: 10.1021/acscatal.7b02223] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Indole alkaloids represent an important class of molecules, with many naturally occurring derivatives possessing significant biological activity. One area that requires further development in the synthesis of indole derivatives is the Diels-Alder reaction. In this work, we expand on our previously developed heterogeneous protocol for the [4+2] cycloaddition of indoles and electron-rich dienes mediated by platinum nanoparticles supported on titanium dioxide semiconductor particles (Pt(0.2%)@TiO2) with visible-light irradiation. This reaction proceeds with broad scope and is more efficient per incident photon than the previous homogeneous method, and the catalyst can be easily recycled and reused.
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Affiliation(s)
- Spencer P. Pitre
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Juan C. Scaiano
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Tehshik P. Yoon
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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32
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Hong AY, Vanderwal CD. A Sequential Cycloaddition Strategy for the Synthesis of Alsmaphorazine B Traces a Path Through a Family of Alstonia Alkaloids. Tetrahedron 2017; 73:4160-4171. [PMID: 28943664 PMCID: PMC5603193 DOI: 10.1016/j.tet.2016.11.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Driven by a new biogenetic hypothesis, the first total synthesis of alsmaphorazine B and several related indole alkaloids has been achieved. Numerous early approaches proved unsuccessful owing to unproductive side reactivity; nevertheless, they provided important clues that guided the evolution of our strategy. Critical to our success was a major improvement in our Zincke aldehyde cycloaddition strategy, which permitted the efficient gram-scale synthesis of akuammicine. The sequential chemoselective oxidations of akuammicine leading up to the key oxidative rearrangement also yielded several biogenetically related indole alkaloids en route to alsmaphorazine B.
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Affiliation(s)
- Allen Y. Hong
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, USA
| | - Christopher D. Vanderwal
- Department of Chemistry, 1102 Natural Sciences II, University of California, Irvine, California 92697-2025, USA
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33
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Trofimov BA, Belyaeva KV, Andriyankova LV, Nikitina LP, Mal’kina AG. Ring-opening of pyridines and imidazoles with electron-deficient acetylenes: En route to metal-free organic synthesis. MENDELEEV COMMUNICATIONS 2017. [DOI: 10.1016/j.mencom.2017.03.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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34
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Lin C, Du HJ, Zhao H, Yan DF, Liu NX, Sun H, Wen X, Xu QL. A formal intermolecular [4 + 2] cycloaddition reaction of 1,3-disubstituted indoles and alkylquinones. Org Biomol Chem 2017; 15:3472-3478. [DOI: 10.1039/c7ob00392g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A formal [4 + 2] cycloaddition reaction of 1,3-disubstituted indoles and alkylquinones was realized to afford polycyclic indolines in good yields.
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Affiliation(s)
- Chao Lin
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Hong-Jin Du
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Hui Zhao
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Ding-Fei Yan
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Nai-Xin Liu
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Hongbin Sun
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Xiaoan Wen
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
| | - Qing-Long Xu
- Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease and State Key Laboratory of Natural Medicines
- China Pharmaceutical University
- Nanjing 210009
- China
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35
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Müller G, Berkenbosch T, Benningshof JCJ, Stumpfe D, Bajorath J. Charting Biologically Relevant Spirocyclic Compound Space. Chemistry 2016; 23:703-710. [DOI: 10.1002/chem.201604714] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Gerhard Müller
- Mercachem; Kerkenbos 1013, 6546 BB Nijmegen, P.O. Box 6747 6503 GE Nijmegen The Netherlands
| | - Tim Berkenbosch
- Mercachem; Kerkenbos 1013, 6546 BB Nijmegen, P.O. Box 6747 6503 GE Nijmegen The Netherlands
| | - Jorg C. J. Benningshof
- Mercachem; Kerkenbos 1013, 6546 BB Nijmegen, P.O. Box 6747 6503 GE Nijmegen The Netherlands
| | - Dagmar Stumpfe
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmannstr. 2 53113 Bonn Germany
| | - Jürgen Bajorath
- Department of Life Science Informatics, B-IT, LIMES Program Unit Chemical Biology and Medicinal Chemistry; Rheinische Friedrich-Wilhelms-Universität; Dahlmannstr. 2 53113 Bonn Germany
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36
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Wang CS, Fan T, Zhang HH, Li C, Shen Y, Mei GJ, Shi F. Gallium Bromide-Promoted Dearomative Indole Insertion in 3-Indolylmethanols: Chemoselective and (Z/E)-Selective Synthesis of 3,3′-Bisindole Derivatives. J Org Chem 2016; 81:11734-11742. [DOI: 10.1021/acs.joc.6b02201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Cong-Shuai Wang
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Tao Fan
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Hong-Hao Zhang
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Can Li
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Yang Shen
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Guang-Jian Mei
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
| | - Feng Shi
- School of Chemistry & Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
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37
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Zhu J, Cheng Y, Kuang X, Wang L, Zheng Z, Tang Y. Highly Efficient Formal [2+2+2] Strategy for the Rapid Construction of Polycyclic Spiroindolines: A Concise Synthesis of 11‐Demethoxy‐16‐
epi
‐myrtoidine. Angew Chem Int Ed Engl 2016; 55:9224-8. [DOI: 10.1002/anie.201603991] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Jun Zhu
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yu‐Jing Cheng
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Xiao‐Kang Kuang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Lijia Wang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Zhong‐Bo Zheng
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yong Tang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
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38
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Kidd J, Maiden K, Morgan JB. Synthesis of β-substituted tryptamines by regioselective ring opening of aziridines. Tetrahedron 2016; 72:3802-3807. [PMID: 27378819 PMCID: PMC4930112 DOI: 10.1016/j.tet.2016.03.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Functionalized tryptamines are targets of interest for development as small molecule therapeutics. The ring opening of aziridines with indoles is a powerful method for tryptamine synthesis if site selectivity can be controlled. 4-Nitrobenzyl carbamate (PNZ)-protected aziridines undergo regioselective ring opening to produce β-substituted tryptamines for a series of indoles. The PNZ-protected tryptamines can be further manipulated by PNZ removal under mild conditions.
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Affiliation(s)
- Jesse Kidd
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Dobo Hall, Wilmington, NC 28403, USA
| | - Kristen Maiden
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Dobo Hall, Wilmington, NC 28403, USA
| | - Jeremy B. Morgan
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Dobo Hall, Wilmington, NC 28403, USA
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39
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Zhu J, Cheng Y, Kuang X, Wang L, Zheng Z, Tang Y. Highly Efficient Formal [2+2+2] Strategy for the Rapid Construction of Polycyclic Spiroindolines: A Concise Synthesis of 11‐Demethoxy‐16‐
epi
‐myrtoidine. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603991] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jun Zhu
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yu‐Jing Cheng
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Xiao‐Kang Kuang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Lijia Wang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Zhong‐Bo Zheng
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yong Tang
- State Key Laboratory of Organometallic ChemistryShanghai, Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjiny 300072 China
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40
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Abstract
Reported herein is the total synthesis of calophyline A, an indoline natural product possessing distinct ring connectivity which has not been synthesized previously. The synthetic route features several key transformations, including an aza-pinacol rearrangement to construct the nitrogen-containing bridged [3.2.2] bicycle, a Heck cyclization to assemble the fused 6/5/6/5 ring system, and a challenging late-stage aldol reaction to generate both a neopentyl quaternary stereogenic center and an oxygen-containing bridged [3.2.1] bicycle.
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Affiliation(s)
- Guang Li
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Xiaoni Xie
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Liansuo Zu
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China. .,Collaborative Innovation Center for Biotherapy, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China.
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41
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Affiliation(s)
- Guang Li
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 China
| | - Xiaoni Xie
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 China
| | - Liansuo Zu
- School of Pharmaceutical Sciences; Tsinghua University; Beijing 100084 China
- Collaborative Innovation Center for Biotherapy; State Key Laboratory of Biotherapy and Cancer Center; West China Hospital; West China Medical School; Sichuan University; Chengdu 610041 China
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42
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Mailyan AK, Eickhoff JA, Minakova AS, Gu Z, Lu P, Zakarian A. Cutting-Edge and Time-Honored Strategies for Stereoselective Construction of C–N Bonds in Total Synthesis. Chem Rev 2016; 116:4441-557. [DOI: 10.1021/acs.chemrev.5b00712] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Artur K. Mailyan
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - John A. Eickhoff
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Anastasiia S. Minakova
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Zhenhua Gu
- Department
of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ping Lu
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Armen Zakarian
- Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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43
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Zhao F, Dai JK, Liu D, Wang SJ, Wang JR. Synthesis and Evaluation of Ester Derivatives of 10-Hydroxycanthin-6-one as Potential Antimicrobial Agents. Molecules 2016; 21:390. [PMID: 27007362 PMCID: PMC6272828 DOI: 10.3390/molecules21030390] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/12/2016] [Accepted: 03/16/2016] [Indexed: 11/26/2022] Open
Abstract
As part of our continuing research on canthin-6-one antimicrobial agents, a new series of ester derivatives of 10-hydroxycanthin-6-one were synthesized using a simple and effective synthetic route. The structure of each compound was characterized by NMR, ESI-MS, FT-IR, UV, and elemental analysis. The antimicrobial activity of these compounds against three phytopathogenic fungi (Alternaria solani, Fusarium graminearum, and Fusarium solani) and four bacteria (Bacillus cereus, Bacillus subtilis, Ralstonia solanacearum, and Pseudomonas syringae) were evaluated using the mycelium linear growth rate method and micro-broth dilution method, respectively. The structure-activity relationship is discussed. Of the tested compounds, 4 and 7s displayed significant antifungal activity against F. graminearum, with inhibition rates of 100% at a concentration of 50 μg/mL. Compounds 5, 7s, and 7t showed the best inhibitory activity against all the tested bacteria, with minimum inhibitory concentrations (MICs) between 3.91 and 31.25 μg/mL. Thus, 7s emerged as a promising lead compound for the development of novel canthine-6-one antimicrobial agents.
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Affiliation(s)
- Fei Zhao
- College of Science, Northwest A & F University, Yangling 712100, China.
| | - Jiang-Kun Dai
- College of Science, Northwest A & F University, Yangling 712100, China.
| | - Dan Liu
- College of Science, Northwest A & F University, Yangling 712100, China.
| | - Shi-Jun Wang
- College of Science, Northwest A & F University, Yangling 712100, China.
| | - Jun-Ru Wang
- College of Science, Northwest A & F University, Yangling 712100, China.
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44
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Dai JK, Dan WJ, Li N, Du HT, Zhang JW, Wang JR. Synthesis, in vitro antibacterial activities of a series of 3- N -substituted canthin-6-ones. Bioorg Med Chem Lett 2016; 26:580-583. [DOI: 10.1016/j.bmcl.2015.11.070] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 11/02/2015] [Accepted: 11/20/2015] [Indexed: 12/17/2022]
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45
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Trofimov BA, Andriyankova LV, Belyaeva KV, Nikitina LP, Afonin AV, Mal'kina AG. Ring-Opening of Pyridines with Acylacetylenes and Water: Straightforward Access to 5-[(Z)-Acylethenyl]amino-2,4-pentadienals. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501286] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Yu Y, Li G, Jiang L, Zu L. An Indoxyl-Based Strategy for the Synthesis of Indolines and Indolenines. Angew Chem Int Ed Engl 2015; 54:12627-31. [DOI: 10.1002/anie.201505173] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Indexed: 11/07/2022]
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47
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Yu Y, Li G, Jiang L, Zu L. An Indoxyl-Based Strategy for the Synthesis of Indolines and Indolenines. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505173] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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48
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Zhao D, Zhang J, Xie Z. Dearomative [2 + 2] Cycloaddition and Formal C–H Insertion Reaction of o-Carboryne with Indoles: Synthesis of Carborane-Functionalized Heterocycles. J Am Chem Soc 2015; 137:9423-8. [DOI: 10.1021/jacs.5b05426] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Da Zhao
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Jiji Zhang
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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49
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Smith JM, Moreno J, Boal BW, Garg NK. Fischer Indolizations as a Strategic Platform for the Total Synthesis of Picrinine. J Org Chem 2015; 80:8954-67. [DOI: 10.1021/acs.joc.5b00872] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Joel M. Smith
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jesus Moreno
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Ben W. Boal
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Neil K. Garg
- Department
of Chemistry and
Biochemistry, University of California, Los Angeles, California 90095, United States
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50
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Hong AY, Vanderwal CD. A synthesis of alsmaphorazine B demonstrates the chemical feasibility of a new biogenetic hypothesis. J Am Chem Soc 2015; 137:7306-9. [PMID: 26034815 PMCID: PMC4477012 DOI: 10.1021/jacs.5b04686] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An N-oxide fragmentation/hydroxylamine oxidation/intramolecular 1,3-dipolar cycloaddition cascade efficiently converted an oxidized congener of akuammicine into the complex, hexacyclic architecture of the alsmaphorazine alkaloids. This dramatic structural change shows the chemical feasibility of our novel proposal for alsmaphorazine biogenesis. Critical to these endeavors was a marked improvement in our previously reported Zincke aldehyde cycloaddition approach to indole alkaloids, which permitted the gram-scale synthesis of akuammicine. The chemoselective oxidations of akuammicine leading up to the key rearrangement also generated several biogenetically related alkaloids of the alstolucine and alpneumine families.
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Affiliation(s)
- Allen Y. Hong
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States
| | - Christopher D. Vanderwal
- Department of Chemistry, University of California, Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, United States
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