1
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Parvatkar P, Maher SP, Zhao Y, Cooper CA, de Castro ST, Péneau J, Vantaux A, Witkowski B, Kyle DE, Manetsch R. In Vitro Antimalarial Activity of Trichothecenes against Liver and Blood Stages of Plasmodium Species. JOURNAL OF NATURAL PRODUCTS 2024; 87:315-321. [PMID: 38262446 PMCID: PMC10897926 DOI: 10.1021/acs.jnatprod.3c01019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/19/2023] [Accepted: 12/19/2023] [Indexed: 01/25/2024]
Abstract
Trichothecenes (TCNs) are a large group of tricyclic sesquiterpenoid mycotoxins that have intriguing structural features and remarkable biological activities. Herein, we focused on three TCNs (anguidine, verrucarin A, and verrucarol) and their ability to target both the blood and liver stages of Plasmodium species, the parasite responsible for malaria. Anguidine and verrucarin A were found to be highly effective against the blood and liver stages of malaria, while verrucarol had no effect at the highest concentration tested. However, these compounds were also found to be cytotoxic and, thus, not selective, making them unsuitable for drug development. Nonetheless, they could be useful as chemical probes for protein synthesis inhibitors due to their direct impact on parasite synthesis processes.
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Affiliation(s)
- Prakash
T. Parvatkar
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
| | - Steven P. Maher
- Center
for Tropical and Emerging Global Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Yingzhao Zhao
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
| | - Caitlin A. Cooper
- Center
for Tropical and Emerging Global Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Sagan T. de Castro
- Center
for Tropical and Emerging Global Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Julie Péneau
- Malaria
Molecular Epidemiology Unit, Institut Pasteur
du Cambodge, 5 Boulevard Monivong, PO Box 983, Phnom Penh, 120 210, Cambodia
| | - Amélie Vantaux
- Malaria
Molecular Epidemiology Unit, Institut Pasteur
du Cambodge, 5 Boulevard Monivong, PO Box 983, Phnom Penh, 120 210, Cambodia
| | - Benoît Witkowski
- Malaria
Molecular Epidemiology Unit, Institut Pasteur
du Cambodge, 5 Boulevard Monivong, PO Box 983, Phnom Penh, 120 210, Cambodia
| | - Dennis E. Kyle
- Center
for Tropical and Emerging Global Diseases, University of Georgia, Athens, Georgia 30602, United States
| | - Roman Manetsch
- Department
of Chemistry and Chemical Biology, Northeastern
University, Boston, Massachusetts 02115, United States
- Department
of Pharmaceutical Sciences, Northeastern
University, Boston, Massachusetts 02115, United States
- Center
for Drug Discovery, Northeastern University, Boston, Massachusetts 02115, United States
- Barnett
Institute
of Chemical and Biological Analysis, Northeastern
University, Boston, Massachusetts 02115, United States
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2
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Li H, Shan L, Liu C, Liu N, Wang X, Hu Y. Chemospecific C3- and C2-Olefinations of Isatins by TfOH-Promoted Tandem Aldol-Grob and Semiacetalization-Grob Fragmentations. Org Lett 2023. [PMID: 37318838 DOI: 10.1021/acs.orglett.3c01475] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
A novel method for TfOH-promoted chemospecific C3- and C2-olefinations of isatins is developed, which offers the first examples of Grob fragmentation using isatins and amides as substrates.
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Affiliation(s)
- Hongchen Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Lidong Shan
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Chulong Liu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Nan Liu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Xinyan Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Yuefei Hu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
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3
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Rodríguez L, Delgado A, Ciudad CJ, Noé V, Bonjoch J, Bradshaw B. Base-Mediated Nitrophenyl Reductive Cyclization for the Synthesis of Hexahydro-2,6-methano-1-benzazocines. J Org Chem 2022; 87:15693-15702. [PMID: 36329560 PMCID: PMC9680033 DOI: 10.1021/acs.joc.2c02205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A Diels-Alder reaction leading to 4-nitrophenylcyclohexanones followed by a newly developed base-mediated reductive cyclization of the resulting ketone tethered to the nitrobenzene moiety gives access to the hexahydro-2,6-methano-1-benzazocine ring system present in several biologically interesting natural products such as aspernomine. The scope of the reaction was explored with eight substituted nitrobenzenes, obtaining yields of up to 87%. The highest cytotoxicity was observed in benzazocine 4h, bearing an enone moiety, which was active against eight cancer cell lines.
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Affiliation(s)
- Laura
G. Rodríguez
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Ana Delgado
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Carlos J. Ciudad
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Véronique Noé
- Department
of Biochemistry and Physiology, Faculty of Pharmacy & IN2UB, University of Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Josep Bonjoch
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain,
| | - Ben Bradshaw
- Laboratori
de Química Orgànica, Facultat de Farmàcia, IBUB, Universitat de Barcelona, Avenida Joan XXIII 27-31, 08028 Barcelona, Spain,
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4
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Yang M, Liu T, Gong Y, Ai QW, Zhao YL. Rhodium-catalyzed coupling-cyclization of o-alkynyl/propargyl arylazides or o-azidoaryl acetylenic ketones with arylisocyanides: synthesis of 6 H-indolo[2,3- b]quinolines, dibenzonaphthyridones and dihydrodibenzo[ b, g] [1,8]-naphthyridines. Org Chem Front 2022. [DOI: 10.1039/d2qo00503d] [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 developed rhodium-catalyzed coupling-cyclization provides a new strategy for the assembly of 6H-indolo[2,3-b]quinolines, dibenzonaphthyridones and dihydrodibenzo[b,g] [1,8]-naphthyridines.
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Affiliation(s)
- Ming Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Tao Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yue Gong
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Qing-Wen Ai
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Changchun 130024, China
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5
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Shnyder SD, Wright CW. Recent Advances in the Chemistry and Pharmacology of Cryptolepine. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2021; 115:177-203. [PMID: 33797643 DOI: 10.1007/978-3-030-64853-4_4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Cryptolepine, the principal constituent of the West African climbing shrub Cryptolepis sanguinolenta, continues to be of interest as a lead to new therapeutic agents, especially for the treatment of protozoal infections and cancer. This contribution reviews the research published in the last decade, highlighting new synthesis routes to cryptolepine and to analogs of this alkaloid, as well as their pharmacology. Studies relating to the use of C. sanguinolenta as an herbal medicine for the treatment of malaria are discussed, as well as the development of analogs of cryptolepine as leads to new agents for the treatment of malaria, trypanosomiasis, and cancer with an emphasis on the pharmacological mechanisms involved. Other potential therapeutic applications include antimicrobial, antidiabetic, and anti-inflammatory activities; the pharmacokinetics and toxicity of cryptolepine are also reviewed.
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Affiliation(s)
- Steven D Shnyder
- Institute of Cancer Therapeutics, School of Pharmacy and Medical Sciences, University of Bradford, Bradford, West Yorkshire, BD7 1DP, UK
| | - Colin W Wright
- School of Pharmacy and Medical Sciences, University of Bradford, Bradford, West Yorkshire, BD7 1DP, UK.
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6
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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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7
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Nadein ON, Aksenov DА, Abakarov GM, Aksenov NА, Voskressensky LG, Aksenov AV. Methods of synthesis of natural indoloquinolines isolated from Cryptolepis sanguinolenta. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02557-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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8
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Hsu Y, Hsieh S, Liu R. Gold‐Catalyzed Annulations of
N
‐Propargyl Ynamides with Anthranils with Two Distinct Chemoselectivities. Chemistry 2019; 25:5288-5297. [DOI: 10.1002/chem.201806083] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/22/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Yu‐Chen Hsu
- Department of ChemistryNational Tsing-Hua University Hsinchu 30013) Taiwan
| | - Shu‐An Hsieh
- Department of ChemistryNational Tsing-Hua University Hsinchu 30013) Taiwan
| | - Rai‐Shung Liu
- Department of ChemistryNational Tsing-Hua University Hsinchu 30013) Taiwan
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9
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Yu. Shuvalov V, Rupp AS, Fisyuk AS, Kuratova AK, Nefedov AA, Sagitullina GP. Synthesis and Optical Properties of Alkaloid Quindoline, Its Structural Analogues and Substituted δ‐Carbolines. ChemistrySelect 2019. [DOI: 10.1002/slct.201803515] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Vladislav Yu. Shuvalov
- Department of Organic ChemistryF. M. Dostoevsky Omsk State University, 55a Mira Ave. 644077 Omsk Russian Federation
- Laboratory of New Organic MaterialsOmsk State Technical University 11 Mira Ave. 644050 Omsk Russian Federation
| | - Anna S. Rupp
- Department of Organic ChemistryF. M. Dostoevsky Omsk State University, 55a Mira Ave. 644077 Omsk Russian Federation
| | - Alexander S. Fisyuk
- Department of Organic ChemistryF. M. Dostoevsky Omsk State University, 55a Mira Ave. 644077 Omsk Russian Federation
- Laboratory of New Organic MaterialsOmsk State Technical University 11 Mira Ave. 644050 Omsk Russian Federation
| | - Anna K. Kuratova
- Department of Organic ChemistryF. M. Dostoevsky Omsk State University, 55a Mira Ave. 644077 Omsk Russian Federation
| | - Andrey A. Nefedov
- N. N. Vorozhtsov Institute of Organic ChemistrySiberian Branch of the Russian Academy of Sciences 9 Lavrentiev Ave. 630090 Novosibirsk Russian Federation
| | - Galina P. Sagitullina
- Department of Organic ChemistryF. M. Dostoevsky Omsk State University, 55a Mira Ave. 644077 Omsk Russian Federation
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10
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Aksenov NA, Aksenov A, Kornienko A, De Carvalho A, Mathieu V, Aksenov DA, Ovcharov SN, Griaznov GD, Rubin M. A nitroalkane-based approach to one-pot three-component synthesis of isocryptolepine and its analogs with potent anti-cancer activities. RSC Adv 2018; 8:36980-36986. [PMID: 35558925 PMCID: PMC9089289 DOI: 10.1039/c8ra08155g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 10/23/2018] [Indexed: 12/02/2022] Open
Abstract
A second generation polyphosphoric acid-mediated one-pot three-component synthesis of indoloquinoline scaffold is developed. This improved version of the process involves electrophilically activated nitroalkanes for the installation of strategic C–C and C–N bonds and ring C assembly. This modification allows the elimination of unnecessary solvent change operations and all steps are carried out in a true, uninterrupted one-pot manner. A further improvement involves the possibility to install an ortho-amino group in situ. A synthetic application of this method is showcased by the concise synthesis of an isocryptolepine alkaloid and its synthetic analogs with potent anticancer activities. An improved one-pot three-component synthesis involving electrophilically activated nitroalkanes allowed for efficient preparation of indoloquinolines with potent anticancer activities.![]()
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Affiliation(s)
- Nicolai A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Alexander V. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | | | - Annelise De Carvalho
- Department of Pharmacotherapy and Pharmaceutics
- Faculté de Pharmacie
- Université Libre de Bruxelles
- Brussels
- Belgium
| | - Véronique Mathieu
- Department of Pharmacotherapy and Pharmaceutics
- Faculté de Pharmacie
- Université Libre de Bruxelles
- Brussels
- Belgium
| | - Dmitrii A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Sergei N. Ovcharov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | | | - Michael Rubin
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
- Department of Chemistry
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11
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Aksenov AV, Aksenov DA, Griaznov GD, Aksenov NA, Voskressensky LG, Rubin M. Unexpected cyclization of 2-(2-aminophenyl)indoles with nitroalkenes to furnish indolo[3,2-c]quinolines. Org Biomol Chem 2018; 16:4325-4332. [DOI: 10.1039/c8ob00588e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel synthetic route to the indoloquinoline core of the alkaloid isocryptolepine involving an unprecedented PPA-mediated reaction of 2-(2-aminophenyl)indenes with nitroalkenes is discovered.
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Affiliation(s)
- Alexander V. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Dmitrii A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | - Georgii D. Griaznov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
- Department of Chemistry
| | - Nicolai A. Aksenov
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
| | | | - Michael Rubin
- Department of Chemistry
- North Caucasus Federal University
- Stavropol 355009
- Russian Federation
- Department of Chemistry
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12
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13
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Aksenov AV, Aksenov DA, Orazova NA, Aksenov NA, Griaznov GD, De Carvalho A, Kiss R, Mathieu V, Kornienko A, Rubin M. One-Pot, Three-Component Assembly of Indoloquinolines: Total Synthesis of Isocryptolepine. J Org Chem 2017; 82:3011-3018. [DOI: 10.1021/acs.joc.6b03084] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander V. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
| | - Dmitrii A. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
| | - Naila A. Orazova
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
| | - Nicolai A. Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
| | - Georgii D. Griaznov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
| | - Annelise De Carvalho
- Laboratoire
de Cancérologie et de Toxicologie Expérimentale, Faculté
de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Robert Kiss
- Laboratoire
de Cancérologie et de Toxicologie Expérimentale, Faculté
de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Véronique Mathieu
- Laboratoire
de Cancérologie et de Toxicologie Expérimentale, Faculté
de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - Alexander Kornienko
- Department of Chemistry and Biochemistry, Texas State University, San Marcos, Texas 78666, United States
| | - Michael Rubin
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin Street, Stavropol 355009, Russia
- Department
of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
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14
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Fan L, Liu M, Ye Y, Yin G. Synthesis of 6-Substituted 6H-Indolo[2,3-b]quinolines from Isoindigos. Org Lett 2016; 19:186-189. [DOI: 10.1021/acs.orglett.6b03484] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ling Fan
- Hubei Collaborative Innovation
Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant
Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, People’s Republic of China
| | - Meilin Liu
- Hubei Collaborative Innovation
Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant
Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, People’s Republic of China
| | - Yu Ye
- Hubei Collaborative Innovation
Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant
Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, People’s Republic of China
| | - Guodong Yin
- Hubei Collaborative Innovation
Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant
Analysis and Reuse Technology, Hubei Normal University, Huangshi 435002, People’s Republic of China
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15
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Badigenchala S, Rajeshkumar V, Sekar G. Iodine mediated intramolecular C2-amidative cyclization of indoles: a facile access to indole fused tetracycles. Org Biomol Chem 2016; 14:2297-305. [DOI: 10.1039/c5ob02449h] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A novel and metal-free I2-mediated intramolecular C2 amidation of indoles under mild reaction conditions is developed for synthesis of indole fused tetracycles.
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Affiliation(s)
| | | | - Govindasamy Sekar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
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16
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Yan Z, Wan C, Wan J, Wang Z. An efficient iron-promoted synthesis of 6H-indolo[2,3-b]quinolines and neocryptolepine derivatives. Org Biomol Chem 2016; 14:4405-8. [DOI: 10.1039/c6ob00469e] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A facile and practical method for the preparation of 6H-indolo[2,3-b]quinolines and neocryptolepines was developed under the promotion of ferric trichloride.
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Affiliation(s)
- Zicong Yan
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Changfeng Wan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- P. R. China
| | - Jianyong Wan
- College of Chemistry and Chemical Engineering
- Jiangxi Normal University
- Nanchang
- P. R. China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
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17
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Bracca ABJ, Heredia DA, Larghi EL, Kaufman TS. Neocryptolepine (Cryprotackieine), A Unique Bioactive Natural Product: Isolation, Synthesis, and Profile of Its Biological Activity. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402910] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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