1
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Chi D, Qi H, Wang L, Chen S. Pd-Catalyzed cascade Heck cyclization/carbonylation of indoles with aryl formates: enantioselective construction of indolo[2,1- a]isoquinolines. Chem Commun (Camb) 2024. [PMID: 39046243 DOI: 10.1039/d4cc02577f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
An efficient palladium-catalyzed cascade cyclization/carbonylation of indoles with aryl formates to access ester-functionalized indolo[2,1-a]isoquinoline scaffolds has been developed. In addition, an asymmetric variant is also achieved using a chiral phosphine ligand, affording the indolo[2,1-a]isoquinoline products in good yields and enantioselectivities.
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Affiliation(s)
- Dongmei Chi
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China.
| | - Hongbo Qi
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China.
| | - Leming Wang
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China.
| | - Shufeng Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, China.
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2
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Chen JZ, Wang ZX. Ruthenium-catalyzed C-H functionalization of indoles and indolines with 7-azabenzonorbornadienes: access to aminodihydronaphthyl indoles and indolines. Org Biomol Chem 2024; 22:5159-5169. [PMID: 38860854 DOI: 10.1039/d4ob00678j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Indoles, indolines and hydronaphthylamines are ubiquitous structural motifs in natural products, pharmaceuticals, and biologically active molecules. In this paper, we report the synthesis of aminodihydronaphthyl-substituted indoles and indolines via a Ru-catalyzed carbamoyl-directed C-H functionalization of indoles and indolines with 7-azabenzonorbornadienes. In the presence of Cu(OAc)2 and AgSbF6, [Ru(p-cymene)Cl2]2 catalyzes the reaction of 1-carbamoylindoles with 7-azabenzonorbornadienes to produce 2-(1-amino-1,2-dihydronaphthalen-2-yl)indoles. Under the same conditions, the reaction of 1-carbamoylindolines with 7-azabenzonorbornadienes affords 7-(1-amino-1,2-dihydronaphthalen-2-yl)indolines. In both cases, the reactions yield cis-configured products.
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Affiliation(s)
- Jia-Zhen Chen
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
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3
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Rashid A, Lone WI, Dogra P, Rashid S, Bhat BA. HFIP-mediated C-3-alkylation of indoles and synthesis of indolo[2,3- b]quinolines & related natural products. Org Biomol Chem 2024; 22:3502-3509. [PMID: 38618907 DOI: 10.1039/d4ob00414k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
An expeditious metal free C-3 alkylation of indoles and its NIS-mediated deviation to indolo[2,3-b]quinolines is reported. This protocol, executed in aqueous HFIP has broad substrate scope and is well inclined towards the ideas of sustainable chemistry. Applications of these strategies in accessing bioactive natural products like vibrindole, norcryptotakeine, neocryptolepine and indenoindolone scaffolds has also been demonstrated.
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Affiliation(s)
- Auqib Rashid
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar 190005, India.
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Jammu and Kashmir 180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Waseem I Lone
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Jammu and Kashmir 180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Preeti Dogra
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Jammu and Kashmir 180001, India.
| | - Showkat Rashid
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine Jammu, Jammu and Kashmir 180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bilal A Bhat
- Natural Products & Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Sanatnagar, Srinagar 190005, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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4
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Tang M, Lu H, Zu L. Collective total synthesis of stereoisomeric yohimbine alkaloids. Nat Commun 2024; 15:941. [PMID: 38296955 PMCID: PMC10830567 DOI: 10.1038/s41467-024-45140-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/16/2024] [Indexed: 02/02/2024] Open
Abstract
Stereoisomeric polycyclic natural products are important for drug discovery-based screening campaigns, due to the close correlation of stereochemistry with diversified bioactivities. Nature generates the stereoisomeric yohimbine alkaloids using bioavailable monoterpene secolaganin as the ten-carbon building block. In this work, we reset the stage by the development of a bioinspired coupling, in which the rapid construction of the entire pentacyclic skeleton and the complete control of all five stereogenic centers are achieved through enantioselective kinetic resolution of an achiral, easily accessible synthetic surrogate. The stereochemical diversification from a common intermediate allows for the divergent and collective synthesis of all four stereoisomeric subfamilies of yohimbine alkaloids through orchestrated tackling of thermodynamic and kinetic preference.
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Affiliation(s)
- Meiyi Tang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, 100084, China
| | - Haigen Lu
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, 100084, China
| | - Liansuo Zu
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, 100084, China.
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5
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Li H, Lu Y, Xu N, Jin X, Chen T, Yu J, Liu J. Rhodium(III)-Catalyzed C-H Cascade Annulation of Arylhydrazines with 2-Diazo-1,3-indandiones for the Synthesis of Tetracyclic Indeno[1,2- b]indoles. J Org Chem 2024. [PMID: 38176055 DOI: 10.1021/acs.joc.3c02243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
An efficient approach for the preparation of tetracyclic indeno[1,2-b]indoles via Rh(III)-catalyzed C-H cascade annulation between arylhydrazines and diazo indan-1,3-diones has been established. In addition, a series of indeno[1,2-b]indoles were obtained in up to 96% yield with a wide range of substrates and high functional group tolerance. Finally, the diverse transformations of the desired products demonstrate the synthetic utility and utilization of this protocol.
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Affiliation(s)
- He Li
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Ye Lu
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Ning Xu
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Xinxin Jin
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Tao Chen
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Jiaqi Yu
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
| | - Jinglin Liu
- Innovation Team of Optical Functional Molecular Devices, Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis, College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao 028000, China
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6
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Abou Baker DH, Hassan EM, El Gengaihi S. An overview on medicinal plants used for combating coronavirus: Current potentials and challenges. JOURNAL OF AGRICULTURE AND FOOD RESEARCH 2023; 13:100632. [PMID: 37251276 PMCID: PMC10198795 DOI: 10.1016/j.jafr.2023.100632] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 05/01/2023] [Accepted: 05/09/2023] [Indexed: 05/31/2023]
Abstract
Worldwide, Severe acute respiratory syndrome Coronavirus (SARS-CoV-2) pandemic crisis, causing many morbidities, mortality, and devastating impact on economies, so the current outbreak of the CoV-2 is a major concern for global health. The infection spread quickly and caused chaos in many countries around the world. The slow discovery of CoV-2 and the limited treatment options are among the main challenges. Therefore, the development of a drug that is safe and effective against CoV-2 is urgently needed. The present overview briefly summarizes CoV-2 drug targets ex: RNA-dependent RNA polymerase (RdRp), papain-like protease (PLpro), 3-chymotrypsin-like protease (3CLpro), transmembrane serine protease enzymes (TMPRSS2), angiotensin-converting enzyme 2 (ACE2), structural protein (N, S, E, and M), and virulence factors (NSP1, ORF7a, and NSP3c) for which drug design perspective can be considered. In addition, summarize all anti-COVID-19 medicinal plants and phytocompounds and their mechanisms of action to be used as a guide for further studies.
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Affiliation(s)
- Doha H Abou Baker
- Medicinal and Aromatic Plants Dept., Pharmaceutical and Drug Industries Institute, National Research Centre, Cairo, Egypt
| | - Emad M Hassan
- Medicinal and Aromatic Plants Dept., Pharmaceutical and Drug Industries Institute, National Research Centre, Cairo, Egypt
| | - Souad El Gengaihi
- Medicinal and Aromatic Plants Dept., Pharmaceutical and Drug Industries Institute, National Research Centre, Cairo, Egypt
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7
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Yang L, Hou A, Jiang Q, Cheng M, Liu Y. Methodological Development and Applications of Tryptamine-Ynamide Cyclizations in Synthesizing Core Skeletons of Indole Alkaloids. J Org Chem 2023; 88:11377-11391. [PMID: 37540141 DOI: 10.1021/acs.joc.3c01088] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Over the past two decades, synthetic strategies for synthesizing the skeletons of various indole alkaloids based on tryptamine-ynamide have been continuously developed and applied to the total syntheses or formal total syntheses of related molecules. In this synopsis, we summarized the cyclization pathways of tryptamine-ynamide under different catalytic conditions, emphasizing the reaction mechanism and applications in the syntheses of indole alkaloids.
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Affiliation(s)
- 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
| | - Anbin Hou
- 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
| | - Qing Jiang
- 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
| | - 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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8
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Singh Chauhan AN, Mali G, Dua G, Samant P, Kumar A, Erande RD. [RhCp*Cl 2] 2-Catalyzed Indole Functionalization: Synthesis of Bioinspired Indole-Fused Polycycles. ACS OMEGA 2023; 8:27894-27919. [PMID: 37576617 PMCID: PMC10413382 DOI: 10.1021/acsomega.3c02510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 07/11/2023] [Indexed: 08/15/2023]
Abstract
Polycyclic fused indoles are ubiquitous in natural products and pharmaceuticals due to their immense structural diversity and biological inference, making them suitable for charting broader chemical space. Indole-based polycycles continue to be fascinating as well as challenging targets for synthetic fabrication because of their characteristic structural frameworks possessing biologically intriguing compounds of both natural and synthetic origin. As a result, an assortment of new chemical processes and catalytic routes has been established to provide unified access to these skeletons in a very efficient and selective manner. Transition-metal-catalyzed processes, in particular from rhodium(III), are widely used in synthetic endeavors to increase molecular complexity efficiently. In recent years, this has resulted in significant progress in reaching molecular scaffolds with enormous biological activity based on core indole skeletons. Additionally, Rh(III)-catalyzed direct C-H functionalization and benzannulation protocols of indole moieties were one of the most alluring synthetic techniques to generate indole-fused polycyclic molecules efficiently. This review sheds light on recent developments toward synthesizing fused indoles by cascade annulation methods using Rh(III)-[RhCp*Cl2]2-catalyzed pathways, which align with the comprehensive and sophisticated developments in the field of Rh(III)-catalyzed indole functionalization. Here, we looked at a few intriguing cascade-based synthetic designs catalyzed by Rh(III) that produced elaborate frameworks inspired by indole bioactivity. The review also strongly emphasizes mechanistic insights for reaching 1-2, 2-3, and 3-4-fused indole systems, focusing on Rh(III)-catalyzed routes. With an emphasis on synthetic efficiency and product diversity, synthetic methods of chosen polycyclic carbocycles and heterocycles with at least three fused, bridged, or spiro cages are reviewed. The newly created synthesis concepts or toolkits for accessing diazepine, indol-ones, carbazoles, and benzo-indoles, as well as illustrative privileged synthetic techniques, are included in the featured collection.
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Affiliation(s)
| | - Ghanshyam Mali
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Garima Dua
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Priya Samant
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Akhilesh Kumar
- Department
of Chemistry and Nano Science, Ewha Womans
University, Seoul 03760, Korea
| | - Rohan D. Erande
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
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9
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Li J, Li JX, Jiang H, Li M, Chen L, Wang YY, Wang L, Zhang N, Guo HZ, Ma KL. Phytochemistry and biological activities of corynanthe alkaloids. PHYTOCHEMISTRY 2023:113786. [PMID: 37422009 DOI: 10.1016/j.phytochem.2023.113786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 06/27/2023] [Accepted: 06/27/2023] [Indexed: 07/10/2023]
Abstract
Medicinal plants constitute a source for designing clinically useful drugs targeting diseases through various mechanisms. Plant secondary metabolites can be used as lead compounds of drugs. Corynanthe alkaloids are highly abundant natural bioactive substances of various core structures possessing important properties such as nerve excitation and antimalarial and analgesic effects. In this review, we summarize and review the state-of-the-art corynanthe-type alkaloid research focusing on phytochemistry, pharmacology, and structural chemistry. Approximately 120 articles reporting 231 alkaloids classified into simple corynanthe, yohimbine, oxindole corynanthe, mavacurane, sarpagine, akuammiline, strychnos, and ajmaline-type groups were compiled. Relevant biological properties discussed include antiviral, antibacterial, anti-inflammatory, antimalarial, muscle-relaxant, vasorelaxant, and analgesic activities and activities affecting the main nervous and cardiac systems, as well as NF-κB inhibitory and Na+-glucose cotransporter inhibitory properties. This review provides insights and a reference for future studies, thus paving the way for the discovery of drugs based on corynanthe alkaloids.
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Affiliation(s)
- Jun Li
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Jia-Xing Li
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Hua Jiang
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China.
| | - Min Li
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Lin Chen
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Yue-Yue Wang
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Lu Wang
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Ning Zhang
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - He-Zhe Guo
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
| | - Kai-Long Ma
- School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, 471023, China
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10
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Visible light mediated Iron-Catalyzed synthesis of C-3 alkylated Indoles, bisindolylmethanes and flavanones using alcohols. Tetrahedron Lett 2023. [DOI: 10.1016/j.tetlet.2023.154428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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11
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He X, Chen Z, Zhu X, Liu H, Chen Y, Sun Z, Chu W. Photoredox-catalyzed trifluoromethylation of 2 H-indazoles using TT-CF 3+OTf - in ionic liquids. Org Biomol Chem 2023; 21:1814-1820. [PMID: 36748884 DOI: 10.1039/d3ob00096f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A protocol for metal and oxidant free photoredox catalyzed trifluoromethylation of 2H-indazoles was developed by using Eosin Y as the photocatalyst and recoverable ionic liquids as the solvents. A series of trifluoromethylated products were obtained in moderate to good yields in this protocol under mild conditions. The reaction proceeded via a free-radical mechanism with a broad substrate range, excellent regioselectivity, and good functional group tolerance. Furthermore, the utility of this protocol was demonstrated by the synthesis of a highly selective ligand for estrogen receptor beta (ERβ) and the drug granisetron. The protocol provides a mild and environmentally friendly solution for trifluoromethylation reaction.
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Affiliation(s)
- Xin He
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Zhicheng Chen
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Xianghui Zhu
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Hao Liu
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Yanjie Chen
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Zhizhong Sun
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
| | - Wenyi Chu
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China.
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12
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Qi H, Chi D, He J, Wang L, Chen S. Pd-Catalyzed Cascade Intramolecular Heck Cyclization/Dearomatization of Indoles for the Construction of Two All-Carbon Quaternary Centers. Org Lett 2022; 24:8880-8885. [PMID: 36445060 DOI: 10.1021/acs.orglett.2c03691] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A facile Pd-catalyzed cascade of intramolecular Heck cyclization/alkylpalladium activated dearomatization of aryl alkyne-tethered indole is described. In this single step two nonadjacent all-carbon quaternary centers, two nitrogen-containing heterocycles, and three C(sp2)-C(sp3) bonds are efficiently furnished. These products could also undergo 5-to-6 ring migration-expansion reaction under Brønsted-acid conditions to transform into the benzo[c]carbazole skeletons.
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Affiliation(s)
- Hongbo Qi
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Dongmei Chi
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Jing He
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Leming Wang
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Shufeng Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
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13
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Evaluation of an approach for the synthesis of C2 alkylated gramines. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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14
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Nakashima K, Hanamura S, Imamura A, Matsushima Y, Hirashima SI, Miura T. Asymmetric Friedel–Crafts alkylation of indoles with α,β‐unsaturated trifluoromethyl ketones using a squaramide organocatalyst. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kosuke Nakashima
- Tokyo University of Pharmacy and Life Sciences: Tokyo Yakka Daigaku Medicinal Chemistry 1432-1 Horinouchi 192-0392 Hachioji JAPAN
| | - Sumire Hanamura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Aoi Imamura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Yasuyuki Matsushima
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Shin-ichi Hirashima
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
| | - Tsuyoshi Miura
- Tokyo University of Pharmacy and Life Science: Tokyo Yakka Daigaku School of Pharmacy Hachioji JAPAN
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15
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Miller ER, Scheidt KA. Enantioselective Syntheses of Yohimbine Alkaloids: Proving Grounds for New Catalytic Transformations. SYNTHESIS-STUTTGART 2022; 54:1217-1230. [PMID: 36187077 PMCID: PMC9524398 DOI: 10.1055/a-1684-2942] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The total synthesis of bioactive alkaloids is an enduring challenge and an indication of the state of the art of chemical synthesis. With the explosion of catalytic asymmetric methods over the past three decades, these compelling targets have been fertile proving grounds for enantioselective bond forming transformations. These activities are summarized herein both to highlight the power and versatility of these methods and to instill future inspiration for new syntheses of these privileged natural products.
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16
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Hu L, Cao W, Wang K, Liu X, Feng X. Asymmetric synthesis of dihydrocarbazoles through a Friedel-Crafts alkylation/annulation sequential reaction of indoles. Chem Commun (Camb) 2021; 57:13138-13141. [PMID: 34807214 DOI: 10.1039/d1cc05099k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective tandem Friedel-Crafts alkylation/annulation of indoles with diazoacetoacetate enones is realized in one pot. A series of dihydrocarbazoles were obtained in moderate yields with good to excellent ee values by using a RhII/ScIII dual-metallic catalyst system. Control experiments revealed that ScIII is critical to both the alkylation and annulation.
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Affiliation(s)
- Linfeng Hu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
| | - Kaixuan Wang
- 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.
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China.
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17
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Jadhav PP, Kahar NM, Dawande SG. Ruthenium(II)-Catalyzed Highly Chemo- and Regioselective Oxidative C6 Alkenylation of Indole-7-carboxamides. Org Lett 2021; 23:8673-8677. [PMID: 34723545 DOI: 10.1021/acs.orglett.1c02948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We disclosed the first efficient method for highly chemo- and regioselective C6 alkenylation of indole-7-carboxamides using inexpensive Ru(II) catalyst through chelation assisted C-H bond activation. Electronically diverse indole-7-carboxamides and alkenes react efficiently to produce a wide range of C6 alkenyl indole derivatives. Further the C6 alkenyl indole-7-carboxamides modified to their derivatives through simple chemical transformations. The observed regioselectivity and kinetics has been evidenced by deuterium incorporation and intermolecular competitive studies. In addition, for mechanistic insights, the intermediates were analyzed by HRMS.
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Affiliation(s)
- Pankaj P Jadhav
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
| | - Nilesh M Kahar
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
| | - Sudam G Dawande
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India
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18
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Sinha S, Singh K, Ved A, Hasan SM, Mujeeb S. Therapeutic Journey and Recent Advances in the Synthesis of Coumarin Derivatives. Mini Rev Med Chem 2021; 22:1314-1330. [PMID: 34784861 DOI: 10.2174/1389557521666211116120823] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 04/27/2021] [Accepted: 09/03/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Coumarin is an oxygen-containing compound in medicinal chemistry. Coumarin plays an important role in both natural systems like plants and also in synthetic medicinal applications as drug molecules. Many structurally different coumarin compounds were found to show a big range of similarity with the vital molecular targets for their pharmacological action and small modifications in their structures resulted insignificant changes in their biological activities. OBJECTIVE This review gives detailed information about the studies of the recent advances in various pharmacological aspects of coumarins. METHOD Various oxygen-containing heterocyclic compounds represented remarkable biological significances. The fused aromatic oxygen-heterocyclic nucleus is able to change its electron density; thus changing the chemical, physical and biological properties respectively due to its multiple binding modes with the receptors, which play crucial role in pharmacological screening of drugs. A number of heterocyclic compounds have been synthesized which have their nucleus derived from various plants and animals. In coumarins, benzene ring is fused with pyrone nucleus which provides stability to the nucleus. Coumarins have shown a wide range of pharmacological activities such as anti-tumour, anti-coagulant, anti-inflammatory, anti-oxidant, antiviral, anti-malarial, anti-HIV and antimicrobial activity etc. Results: Reactive oxygen species like superoxide anion, hydroxyl radical and hydrogen peroxide are a type of unstable molecule that contains oxygen, which reacts with other molecules in the cell during the metabolism process but it may produce cytotoxicity when reactive oxygen species increase in number, by the damage of biological macromolecules. Hydroxyl radical (˙OH), is a strong oxidizing agent and it is responsible for the cytotoxicity by oxygen in different plants, animals and other microbes. coumarin is the oldest and effective compound having antimicrobial activity, anti-inflammatory, antioxidant, antidepressant activity, analgesic, anticonvulsant activity, etc. Naturally existing coumarin compounds act against SARS-CoV-2 by preventing viral replication through the targeting on active site against the Mpro target protein. CONCLUSION This review highlights the different biological activities of coumarin derivatives. In this review we provide an updated summary of the researches which are related to recent advances in biological activities of coumarins analogue and their most recent activities against COVID -19. Natural compounds act as a rich resource for novel drug development against various SARS-CoV-2 viral strains including viruses like herpes simplex virus, influenza virus, human immunodeficiency virus, hepatitis B and C viruses, middle east respiratory syndrome and severe acute respiratory syndrome.
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Affiliation(s)
- Shweta Sinha
- Faculty of Pharmacy, Integral University, Kursi road, Lucknow-226026 (U.P.). India
| | - Kuldeep Singh
- Faculty of Pharmacy, Integral University, Kursi road, Lucknow-226026 (U.P.). India
| | - Akash Ved
- Goel Institute of Pharmaceutical Sciences, Lucknow -226028 (U.P.). India
| | - Syed Misbahul Hasan
- Faculty of Pharmacy, Integral University, Kursi road, Lucknow-226026 (U.P.). India
| | - Samar Mujeeb
- Hygia Institute of Pharmaceutical Education and Research, Lucknow. India
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19
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Bakthadoss M, Vinayagam V. Construction of hybrid polycyclic quinolinobenzo[a]phenazinone architectures using solid-state melt reaction (SSMR). Mol Divers 2021; 25:2447-2458. [PMID: 32367313 DOI: 10.1007/s11030-020-10090-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 04/15/2020] [Indexed: 11/30/2022]
Abstract
An efficient and versatile protocol for the synthesis of hybrid polycyclic quinolinobenzo[a]phenazinones has been developed under SSMR condition via intramolecular domino Knoevenagel-hetero-Diels-Alder reaction involving the generation of two new six membered fused rings and three contiguous stereogenic centers.
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Affiliation(s)
- Manickam Bakthadoss
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India.
| | - Varathan Vinayagam
- Department of Chemistry, Pondicherry University, Pondicherry, 605 014, India
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20
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Wu M, Wang S, Wang Y, Gao H, Yi W, Zhou Z. TFA‐Prompted/Rh(III)‐Catalysed Chemoselective C
3
− or C
2
−H Functionalization of Indoles with Methylenecyclopropanes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Min Wu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
| | - Shengdong Wang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
| | - Yi Wang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
| | - Hui Gao
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
| | - Wei Yi
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
| | - Zhi Zhou
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences & the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 511436 P. R. China
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21
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Natural Bioactive Compounds Targeting Epigenetic Pathways in Cancer: A Review on Alkaloids, Terpenoids, Quinones, and Isothiocyanates. Nutrients 2021; 13:nu13113714. [PMID: 34835969 PMCID: PMC8621755 DOI: 10.3390/nu13113714] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/18/2021] [Accepted: 10/19/2021] [Indexed: 12/11/2022] Open
Abstract
Cancer is one of the most complex and systemic diseases affecting the health of mankind, causing major deaths with a significant increase. This pathology is caused by several risk factors, of which genetic disturbances constitute the major elements, which not only initiate tumor transformation but also epigenetic disturbances which are linked to it and which can induce transcriptional instability. Indeed, the involvement of epigenetic disturbances in cancer has been the subject of correlations today, in addition to the use of drugs that operate specifically on different epigenetic pathways. Natural molecules, especially those isolated from medicinal plants, have shown anticancer effects linked to mechanisms of action. The objective of this review is to explore the anticancer effects of alkaloids, terpenoids, quinones, and isothiocyanates.
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22
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Heravi MM, Amiri Z, Kafshdarzadeh K, Zadsirjan V. Synthesis of indole derivatives as prevalent moieties present in selected alkaloids. RSC Adv 2021; 11:33540-33612. [PMID: 35497516 PMCID: PMC9042329 DOI: 10.1039/d1ra05972f] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 09/10/2021] [Indexed: 02/02/2023] Open
Abstract
Indoles are a significant heterocyclic system in natural products and drugs. They are important types of molecules and natural products and play a main role in cell biology. The application of indole derivatives as biologically active compounds for the treatment of cancer cells, microbes, and different types of disorders in the human body has attracted increasing attention in recent years. Indoles, both natural and synthetic, show various biologically vital properties. Owing to the importance of this significant ring system, the investigation of novel methods of synthesis have attracted the attention of the chemical community. In this review, we aim to highlight the construction of indoles as a moiety in selected alkaloids.
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Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Zahra Amiri
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Kosar Kafshdarzadeh
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
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23
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Guo ZQ, Xu H, Wang X, Wang ZY, Ma B, Dai HX. C3-Arylation of indoles with aryl ketones via C-C/C-H activations. Chem Commun (Camb) 2021; 57:9716-9719. [PMID: 34473138 DOI: 10.1039/d1cc03954g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
C3-Arylation of indoles with aryl ketones is accomplished via palladium-catalyzed ligand-promoted Ar-C(O) cleavage and subsequent C-H arylation of indole. Various (hetero)aryl ketones are compatible in this reaction, affording the corresponding 3-arylindoles in moderate to good yields. Further introduction of an indole moiety into the natural products desoxyestrone and evodiamine demonstrate the synthetic utility of this protocol.
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Affiliation(s)
- Zi-Qiong Guo
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Hui Xu
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Xing Wang
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Yu Wang
- School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Biao Ma
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China.
| | - Hui-Xiong Dai
- Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China. .,University of Chinese Academy of Sciences, Beijing 100049, China
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24
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Ankade SB, Samal PP, Soni V, Gonnade RG, Krishnamurty S, Punji B. Ni(II)-Catalyzed Intramolecular C–H/C–H Oxidative Coupling: An Efficient Route to Functionalized Cycloindolones and Indenoindolones. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03314] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shidheshwar B. Ankade
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pragnya Paramita Samal
- Physical and Materials Chemistry Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Vineeta Soni
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rajesh G. Gonnade
- Centre for Material Characterization, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
| | - Sailaja Krishnamurty
- Physical and Materials Chemistry Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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25
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Tan X, Zhang J, Liu X, Jin Y. Metal-free oxidative ketonization–olefination of indoles by cross-coupling with 1,3-dicarbonyl substrate. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153322] [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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26
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Mondal A, Sharma R, Pal D, Srimani D. Recent Progress in the Synthesis of Heterocycles through Base Metal‐Catalyzed Acceptorless Dehydrogenative and Borrowing Hydrogen Approach. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100517] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Avijit Mondal
- Department of Chemistry Indian Institute of Technology Guwahati, Assam Kamrup (Rural) 781039 India
| | - Rahul Sharma
- Department of Chemistry Indian Institute of Technology Guwahati, Assam Kamrup (Rural) 781039 India
| | - Debjyoti Pal
- Department of Chemistry Indian Institute of Technology Guwahati, Assam Kamrup (Rural) 781039 India
| | - Dipankar Srimani
- Department of Chemistry Indian Institute of Technology Guwahati, Assam Kamrup (Rural) 781039 India
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27
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Why is an experimental regioselectivity of Fischer indole syntheses observed: A mechanistic model DFT study. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Qi H, Han K, Chen S. Palladium-Catalyzed Aryl-Furanylation of Alkenes: Synthesis of Benzofuran-Containing 3,3-Disubstituted Oxindoles. J Org Chem 2021; 86:9384-9395. [PMID: 34210128 DOI: 10.1021/acs.joc.1c00617] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel palladium-catalyzed aryl-furanylation of alkenes is described. This protocol provided a straightforward route to the synthesis of various benzofuran-containing 3,3-disubstitutedoxindole derivatives bearing a quarternary carbon center. In the cascade process, one C(sp2)-O bond, two C(sp2)-C(sp3) bonds, an oxindole, and a furan ring are formed in a single chemical operation.
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Affiliation(s)
- Hongbo Qi
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Kaiming Han
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Shufeng Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis, Department of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
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29
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Shelar SV, Argade NP. Facile synthesis of indolizinoindolone, indolylepoxypyrrolooxazole, indolylpyrrolooxazolone and isoindolopyrazinoindolone heterocycles from indole and imide derivatives. Org Biomol Chem 2021; 19:6160-6169. [PMID: 34190304 DOI: 10.1039/d1ob00754h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Chemo-, regio- and diastereoselective coupling reactions of indole with imide derivatives leading to unique heterocyclic systems are demonstrated. Acid-induced 3-position coupling reactions of indole with cyclic imide derived lactamols followed by acid promoted 2-position cyclizations with the corresponding aldehydes are described to obtain the indolizinoindolones and benzoindolizinoindolones. Base induced 2-position coupling reactions of N-tosylindole with N-(2-iodoethyl)imides and the subsequent cyclizations provide indolylepoxypyrrolooxazole, indolylpyrrolooxazolone and indolyloxazoloisoindolone. Reductive cleavage of indolyloxazoloisoindolone to the corresponding alcohol followed by mesylation and base promoted N-cyclization affords the in situ air-oxidized pentacyclic product hydroxyisoindolopyrazinoindolone. A regioisomeric structural revision of the natural product from 1,2,5,6,7,11c-hexahydro-3H-indolizino[7,8-b]indol-3-one to 1,2,5,6,11,11b-hexahydro-3H-indolizino(8,7-b)indol-3-one is also reported in the present studies focussed on the methodologies for heterocyclic synthesis.
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Affiliation(s)
- Santosh V Shelar
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Narshinha P Argade
- Division of Organic Chemistry, National Chemical Laboratory (CSIR), Pune 411 008, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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30
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Jagtap RA, Punji B. Nickel-Catalyzed C-H Bond Functionalization of Azoles and Indoles. CHEM REC 2021; 21:3573-3588. [PMID: 34075686 DOI: 10.1002/tcr.202100113] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
Direct C-H functionalization of privileged and biologically relevant azoles and indoles represents an important chemical transformation in molecular science. Despite significant progress in the palladium-catalyzed regioselective C-H functionalization of azoles and indoles, the use of abundant and less expensive nickel catalyst is underdeveloped. In the recent past, the nickel-catalyzed regioselective C-H alkylation, arylation, alkenylation and alkynylation of azoles and indoles have been substantially explored, which can be applied to the complex organic molecule synthesis. In this Account, we summarize the developments in nickel-catalyzed regioselective functionalization of azoles and indoles with a considerable focus on the reaction mechanism.
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Affiliation(s)
- Rahul A Jagtap
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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31
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Yin H, Ma Q, Wang Y, Gu X, Feng Z, Wu Y, Wang M, Wang S. Synthesis of tetrahydro-β-carbolines from 2-indolylmethyl azides and propargylic alcohols. RSC Adv 2021; 11:19639-19646. [PMID: 35479240 PMCID: PMC9033608 DOI: 10.1039/d1ra03022a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 05/21/2021] [Indexed: 11/21/2022] Open
Abstract
A facile and efficient route to tetrahydro-β-carbolines from 2-indolylmethyl azides and propargylic alcohols via acid-catalyzed dehydrative annulation reactions is described. This reaction proceeds through a cascade sequence of Friedel–Crafts-type alkylation followed by intramolecular “Click” reaction, involving the formation of multiple chemical bonds in a single operation with excellent atom-economy and broad functional group tolerance. The synthesis of tetrahydro-β-carbolines from 2-indolylmethyl azides and propargylic alcohols via acid-catalyzed dehydrative [4 + 2]-annulation reaction is described.![]()
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Affiliation(s)
- Haiting Yin
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Qin Ma
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Yushan Wang
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Xiaoxia Gu
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Zhijun Feng
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Yunjun Wu
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Ming Wang
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
| | - Shaoyin Wang
- Department of Chemistry, Institute of Synthesis and Application of Medical Materials, Chunhui Scientific Research Interest Group, Wannan Medical College Wuhu Anhui 241002 China
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32
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Pan YL, Xu HF, Hu XY, Li GJ, Chen JZ. Copper(II)-catalysed direct C3-H esterification of indoles assisted by an N, N-bidentate auxiliary moiety. Org Biomol Chem 2021; 19:3911-3924. [PMID: 33949415 DOI: 10.1039/d0ob02301a] [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
The regioselective direct C3-esterification of indoles with OXA is developed in an efficient reaction with carboxylic acids using the catalyst CuBr2 and oxidants Ag2CO3 and K2S2O8. The simple experimental procedure is proved to be broadly applicable to a range of substrates, including aromatic and aliphatic acids, and the corresponding products were obtained in good yields up to 87%. At the same time, it provides a valuable approach to produce C3-benzyl derivatives of indoles through reaction with benzyl carboxylic acid under the same reaction conditions.
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Affiliation(s)
- You-Lu Pan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd., Hangzhou, Zhejiang 310058, China.
| | - Hai-Feng Xu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd., Hangzhou, Zhejiang 310058, China.
| | - Xu-Yang Hu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd., Hangzhou, Zhejiang 310058, China.
| | - Gang-Jian Li
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd., Hangzhou, Zhejiang 310058, China.
| | - Jian-Zhong Chen
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Rd., Hangzhou, Zhejiang 310058, China.
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33
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Chen L, Liu X, Zhang J, Duan L, Wen Z, Ni H. Relay Cu(I)/Brønsted Base Catalysis for
Phospha
‐Michael Addition/5‐
exo
‐
dig
Cyclization/Isomerization of
in
situ
Formed
aza
‐Alkynyl
o‐
quinone methides with P(O)−H compounds to C3‐Phosphorylated Indoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Long Chen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University 2025 Chengluo Avenue Chengdu 610016 People's Republic of China
| | - Xiao‐Yan Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University 2025 Chengluo Avenue Chengdu 610016 People's Republic of China
| | - Jing Zhang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University 2025 Chengluo Avenue Chengdu 610016 People's Republic of China
| | - Li Duan
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University 2025 Chengluo Avenue Chengdu 610016 People's Republic of China
| | - Zhong Wen
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University 2025 Chengluo Avenue Chengdu 610016 People's Republic of China
| | - Hai‐Liang Ni
- College of Chemistry and Materials Science Sichuan Normal University 5 Jing An Road Chengdu 610066 People's Republic of China
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34
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35
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Liu Z, Hu X, Yang C, Xie H, Jiang H, Zeng W. Rh(III)‐Catalyzed C
sp
2
−C
sp
3
Bond Cleavage/Carbonylethylation of α‐Indolyl Alcohols. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001430] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zhipeng Liu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
| | - Xinwei Hu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
| | - Can Yang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
| | - Haisheng Xie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
| | - Wei Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 People's Republic of China
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36
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Deng Y, You S, Ruan M, Wang Y, Chen Z, Yang G, Gao M. Electrochemical Regioselective Phosphorylation of Nitrogen‐Containing Heterocycles and Related Derivatives. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202000997] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yong Deng
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Shiqi You
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Mengyao Ruan
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Ying Wang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Zuxing Chen
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Guichun Yang
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
| | - Meng Gao
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecule & School of Chemistry and Chemical Engineering Hubei University Wuhan 430062 People's Republic of China
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He X, Zhu L, Heng D, Liu F, Liu S, Zhong K, Shan C, Bai R, Lan Y. Mechanistic insights into the rhodium–copper cascade catalyzed dual C–H annulation of indoles. Org Chem Front 2021. [DOI: 10.1039/d0qo01332c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory (DFT) calculations have been performed to provide mechanistic insight into the Rh/Cu co-catalyzed multicomponent annulation of indoles, diazo compounds, and α,β-unsaturated esters.
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Affiliation(s)
- Xiaoqian He
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Dan Heng
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Fenru Liu
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Shihan Liu
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Kangbao Zhong
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Chunhui Shan
- College of Chemistry
- Chongqing Normal University
- Chongqing 401331
- China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
| | - Yu Lan
- School of Chemistry and Chemical Engineering
- Chongqing Key Laboratory of Theoretical and Computational Chemistry
- Chongqing University
- Chongqing 400030
- China
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38
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Design and synthesis of nature-inspired chromenopyrroles as potential modulators of mitochondrial metabolism. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02669-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Zheng L, Tao K, Guo W. Recent Developments in Photo‐Catalyzed/Promoted Synthesis of Indoles and Their Functionalization: Reactions and Mechanisms. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001079] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 People's Republic of China
| | - Kailiang Tao
- Key Laboratory of Organo-pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 People's Republic of China
| | - Wei Guo
- Key Laboratory of Organo-pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 People's Republic of China
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Catalytic asymmetric dipolar cycloadditions of indolyl delocalized metal-allyl species for the enantioselective synthesis of cyclopenta [b]indoles and pyrrolo[1,2-a]indoles. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9854-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Xiong J, Zhao X, Feng X, Xianxing J. Decarboxylative Propargylation/Hydroamination/Aromatization Enabled by Copper/ Amine Cooperative Catalysis: Construction of Cyclopenta[b]indole Derivatives. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200701115141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient decarboxylative cycloaddition of 2,3-dioxopyrrolidines and ethynyl
benzoxazinanones has been established by cooperative copper/amine catalysis. A copper–
allenylidene complex and enolate intermediate, each catalytically generated from distinct
substrates, underwent a cascade propargylation/hydroamination/aromatization process to
construct a big library of cyclopenta[b]indole derivatives with good to excellent yields and
excellent diastereoselectivity.
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Affiliation(s)
- Jiale Xiong
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xiaoyun Zhao
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xing Feng
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Jiang Xianxing
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
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Xian Y, Zhang J, Bian Z, Zhou H, Zhang Z, Lin Z, Xu H. Bioactive natural compounds against human coronaviruses: a review and perspective. Acta Pharm Sin B 2020; 10:1163-1174. [PMID: 32834947 PMCID: PMC7278644 DOI: 10.1016/j.apsb.2020.06.002] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/19/2020] [Accepted: 05/25/2020] [Indexed: 02/08/2023] Open
Abstract
Coronaviruses (CoVs), a family of enveloped positive-sense RNA viruses, are characterized by club-like spikes that project from their surface, unusually large RNA genome, and unique replication capability. CoVs are known to cause various potentially lethal human respiratory infectious diseases, such as severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and the very recent coronavirus disease 2019 (COVID-19) outbreak. Unfortunately, neither drug nor vaccine has yet been approved to date to prevent and treat these diseases caused by CoVs. Therefore, effective prevention and treatment medications against human coronavirus are in urgent need. In the past decades, many natural compounds have been reported to possess multiple biological activities, including antiviral properties. In this article, we provided a comprehensive review on the natural compounds that interfere with the life cycles of SARS and MERS, and discussed their potential use for the treatment of COVID-19.
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Key Words
- 3CLpro, chymotrypsin-like protease
- ACE2, angiotensin-converting enzyme 2
- BALF, bronchoalveolar lavage fluid
- COVID-19
- COVID-19, coronavirus disease 2019
- CoVs, coronaviruses
- Coronavirus
- DAT, desaminotyrosine
- ER, endoplasmic reticulum
- ERGIC, endoplasmic reticulum–Golgi intermediate compartment
- HCoVs, human coronaviruses
- HLH, hemophagocytic lymphohistiocytosis
- HR, heptad repeats
- HSV, herpes simplex virus
- IL, interleukin
- LHQWC, Lian-Hua-Qing-Wen Capsule
- MAPK, mitogen-activated protein kinase
- MERS, Middle East respiratory syndrome
- MERS-CoV
- MERS-CoV, Middle East respiratory syndrome coronavirus
- N protein, nucleocapsid protein
- NCIP, novel coronavirus-infected pneumonia
- NF-κB, nuclear factor-κB
- Natural compounds
- PI3K, phosphoinositide 3-kinases
- PLpro, papain-like protease
- RNA-Virus
- RTC, replication transcription complex
- RdRp, RNA-dependent RNA polymerase
- S protein, spike protein
- SARS, severe acute respiratory syndrome
- SARS-CoV
- SARS-CoV, severe acute respiratory syndrome coronavirus
- SARS-CoV-2
- SARS-CoV-2, severe acute respiratory syndrome coronavirus 2
- STAT, signal transducer and activator of transcription
- TCM, traditional Chinese medicine
- WHO, World Health Organization
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Wen ZK, Wu XX, Bao WK, Xiao JJ, Chao JB. Palladium-Catalyzed Regioselective Coupling Cyclohexenone into Indoles: Atom-Economic Synthesis of β-Indolyl Cyclohexenones and Derivatization Applications. Org Lett 2020; 22:4898-4902. [PMID: 32515596 DOI: 10.1021/acs.orglett.0c01763] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Herein, we report a palladium-catalyzed dehydrogenative cross-coupling of indoles with cyclic enones to give β-indolyl cyclic enones under mild and neutral reaction conditions. The key to the success is to explore a mild condition, which ensures the indole C-H activation and subsequent syn β-hydride elimination through rapid enolization isomerization of Pd(II)-enolate while suppressing other undesired side reactions. Synthetic utility has also been demonstrated in the flexible transformation of the coupling products to meta-phenols and benzo[a]carbazoles.
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Affiliation(s)
- Zhen-Kang Wen
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Xiao-Xue Wu
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Wen-Kai Bao
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jing-Jing Xiao
- School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
| | - Jian-Bin Chao
- Scientific Instrument Center, Shanxi University, Taiyuan 030006, China
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Chen C, Wang Y, Shi X, Sun W, Zhao J, Zhu YP, Liu L, Zhu B. Palladium-Catalyzed C-2 and C-3 Dual C-H Functionalization of Indoles: Synthesis of Fluorinated Isocryptolepine Analogues. Org Lett 2020; 22:4097-4102. [PMID: 32459097 DOI: 10.1021/acs.orglett.0c01159] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Here we report a protocol to synthesize diversiform fluorinated isocryptolepine analogues with potential biological activities in one step via directed C-2 and C-3 dual C-H functionalization of indoles. We also attempted to take into account fluorinated imidoyl chlorides as a novel kind of synthons in the directed C-H functionalization reactions. As a result, a variety of fluorinated isocryptolepine analogues were obtained in up to 96% yield. Moreover, we conducted control experiments to disclose the reaction mechanism.
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Affiliation(s)
- Chen Chen
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Yuebo Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Xiaonan Shi
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Wan Sun
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Jinghui Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Yan-Ping Zhu
- School of Pharmacy, Key Laboratory of Molecular Pharmacology and Drug Evaluation, Ministry of Education, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Yantai University, Shandong, Yantai, 264005, People's Republic of China
| | - Liying Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
| | - Bolin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, People's Republic of China
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Biswas N, Sharma R, Srimani D. Ruthenium Pincer Complex Catalyzed Selective Synthesis of C‐3 Alkylated Indoles and Bisindolylmethanes Directly from Indoles and Alcohols. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000326] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nandita Biswas
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
| | - Rahul Sharma
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
| | - Dipankar Srimani
- Department of ChemistryIndian Institute of Technology Guwahati Assam India 781039
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46
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Indole-based derivatives as potential antibacterial activity against methicillin-resistance Staphylococcus aureus (MRSA). Eur J Med Chem 2020; 194:112245. [DOI: 10.1016/j.ejmech.2020.112245] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/20/2020] [Accepted: 03/16/2020] [Indexed: 12/15/2022]
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47
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Shankaraiah N, Sakla AP, Laxmikeshav K, Tokala R. Reliability of Click Chemistry on Drug Discovery: A Personal Account. CHEM REC 2020; 20:253-272. [DOI: 10.1002/tcr.201900027] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/08/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Nagula Shankaraiah
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Akash P. Sakla
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Kritika Laxmikeshav
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
| | - Ramya Tokala
- Department of Medicinal ChemistryNational Institute of Pharmaceutical Education and Research (NIPER) Hyderabad 500037 India
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48
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Lu G, Xie F, Xie R, Jiang H, Zhang M. Iridium/Acid Cocatalyzed Direct Access to Fused Indoles via Transfer Hydrogenative Annulation of Quinolines and 1,2-Diketones. Org Lett 2020; 22:2308-2312. [DOI: 10.1021/acs.orglett.0c00500] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guangpeng Lu
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Rd-381, Guangzhou 510641, P. R. China
| | - Feng Xie
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
| | - Rong Xie
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Rd-381, Guangzhou 510641, P. R. China
| | - Huanfeng Jiang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Rd-381, Guangzhou 510641, P. R. China
| | - Min Zhang
- Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Wushan Rd-381, Guangzhou 510641, P. R. China
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen 529020, China
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Miller ER, Hovey MT, Scheidt KA. A Concise, Enantioselective Approach for the Synthesis of Yohimbine Alkaloids. J Am Chem Soc 2020; 142:2187-2192. [PMID: 31951394 DOI: 10.1021/jacs.9b12319] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a concise, enantioselective synthesis of the yohimbine alkaloids (-)-rauwolscine and (-)-alloyohimbane. The key transformation involves a highly enantio- and diastereoselective NHC-catalyzed dimerization and an amidation/N-acyliminium ion cyclization sequence to furnish four of the five requisite rings and three of the five stereocenters in two operations. This route also provides efficient access to all four diastereomeric arrangements of the core stereotriad of the yohimbine alkaloids from a common intermediate. This platform approach in combination with the ability to access both enantiomers from the carbene-catalyzed reaction is a powerful strategy that can produce a wide range of complex alkaloids and related structures for future biomedical investigations.
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Affiliation(s)
- Eric R Miller
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - M Todd Hovey
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
| | - Karl A Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , United States
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Wang R, Ding T, Jiang L, He W, Yi W. Fluoromethoxymethylation of Nitrogen Heterocyclic Compounds with Fluoromethyl Iodide. J Org Chem 2020; 85:3993-4001. [PMID: 31913626 DOI: 10.1021/acs.joc.9b03193] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The fluoromethoxymethylation of nitrogen heterocyclic compounds with fluoromethyl iodide has been reported for the first time. In this reaction, a number of unexplored fluoromethoxymethylated nitrogen heterocyclic compounds including indoles, carbazoles, and 1H-indazoles were efficiently formed. Mechanistic studies indicated that this transformation consists of electrophilic monofluoromethylation, rapid hydrolysis, and another electrophilic monofluoromethylation. This method makes it possible to synthesize complex bioactive molecules containing a CH2OCH2F group, which have the potential to be a new series of fluorine-containing chemical entities for medicinal chemists.
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Affiliation(s)
- Rongkang Wang
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Tianqi Ding
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Lvqi Jiang
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Wujuan He
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
| | - Wenbin Yi
- College of Chemical Engineering, Nanjing University of Science & Technology 200 Xiaolingwei, Nanjing 210094, P. R. China
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