1
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Parvatkar PT, Diagne K, Zhao Y, Manetsch R. Indoloquinoline Alkaloids as Antimalarials: Advances, Challenges, and Opportunities. ChemMedChem 2024:e202400254. [PMID: 38840271 DOI: 10.1002/cmdc.202400254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/07/2024]
Abstract
Malaria infections affect almost half of the world's population, with over 200 million cases reported annually. Cryptolepis sanguinolenta, a plant native to West Africa, has long been used across various regions of Africa for malaria treatment. Chemical analysis has revealed that the plant is abundant in indoloquinolines, which have been shown to possess antimalarial properties. Cryptolepine, neocryptolepine, and isocryptolepine are well-studied indoloquinoline alkaloids known for their potent antimalarial activity. However, their structural rigidity and associated cellular toxicity are major drawbacks for preclinical development. This review focuses on the potential of indoloquinoline alkaloids (cryptolepine, neocryptolepine, and isocryptolepine) as scaffolds in drug discovery. The article delves into their antimalarial effects in vitro and in vivo, as well as their proposed mechanisms of action and structure-activity relationship studies. Several studies aim to improve these leads by reducing cytotoxicity while preserving or enhancing antimalarial activity and gaining insights into their mechanisms of action. These investigations highlight the potential of indoloquinolines as a scaffold for developing new antimalarial drugs.
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Affiliation(s)
- Prakash T Parvatkar
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA
| | - Khaly Diagne
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA
| | - Yingzhao Zhao
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA
| | - Roman Manetsch
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, MA 02115, USA
- Department of Pharmaceutical Sciences, Northeastern University, Boston, MA 02115, USA
- Center for Drug Discovery, Northeastern University, Boston, MA 02115, USA
- Barnett Institute of Chemical and Biological Analysis, Northeastern University, Boston, MA 02115, USA
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2
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Bhattacharya A, Babu NR, Bandyopadhyay D, Peruncheralathan S. Cu(OTf) 2 Enhanced Intramolecular Nucleophilic N-Arylation of 2-Amino-3-arylquinolines. J Org Chem 2023. [PMID: 37339426 DOI: 10.1021/acs.joc.3c00645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
In the presence of Cu(OTf)2 (5 mol %) and KOtBu, a synergistic effect of the N-arylation process on 2-amino-3-arylquinolines is observed. Within 4 h, this method provides a wide variety of norneocryptolepine analogues with good to excellent yields. Overall, a double heteroannulation strategy for the synthesis of indoloquinoline alkaloids from nonheterocyclic precursors is demonstrated. Mechanistic investigations establish that the reaction proceeds via the SNAr pathway. Despite moderate yields, the one-pot, two-step double heteroannulation illustrates that this procedure is highly atom-efficient. Neocryptolepine, a natural product, is also synthesized from indoloquinoline. A brief study of the photophysical properties of selected norneocryptolepine analogues is also discussed.
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Affiliation(s)
- Anwesha Bhattacharya
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, Odisha, India
| | - Nayanthara Ramesh Babu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, Odisha, India
| | - Debashruti Bandyopadhyay
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, Odisha, India
| | - Saravanan Peruncheralathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, an OCC of Homi Bhabha National Institute, Khurda - 752050, Odisha, India
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3
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Chniti S, Kollár L, Bényei A, Dörnyei Á, Takács A. Highly Chemoselective One‐Step Synthesis of Novel
N
‐Substituted‐Pyrrolo[3,4‐b]quinoline‐1,3‐diones via Palladium‐Catalyzed Aminocarbonylation/Carbonylative Cyclisation Sequence. European J Org Chem 2023. [DOI: 10.1002/ejoc.202201374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- Sami Chniti
- Department of General and Inorganic Chemistry Faculty of Sciences University of Pécs Ifjúság útja 6. 7624 Pécs Hungary
| | - László Kollár
- Department of General and Inorganic Chemistry Faculty of Sciences University of Pécs Ifjúság útja 6. 7624 Pécs Hungary
- János Szentágothai Research Centre University of Pécs Ifjúság útja 20. 7624 Pécs Hungary
- ELKH-PTE Research Group for Selective Chemical Syntheses Ifjúság útja 6. 7624 Pécs Hungary
| | - Attila Bényei
- Department of Pharmaceutical Chemistry University of Debrecen Egyetem tér 1. H-4032 Pécs Hungary
| | - Ágnes Dörnyei
- Department of Analytical and Environmental Chemistry Faculty of Sciences University of Pécs Ifjúság útja 6. 7624 Pécs Hungary
| | - Attila Takács
- Department of General and Inorganic Chemistry Faculty of Sciences University of Pécs Ifjúság útja 6. 7624 Pécs Hungary
- János Szentágothai Research Centre University of Pécs Ifjúság útja 20. 7624 Pécs Hungary
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4
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Singha K, Habib I, Hossain M. Quinoline N‐Oxide: A Versatile Precursor in Organic Transformations. ChemistrySelect 2022. [DOI: 10.1002/slct.202203537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Koustav Singha
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
| | - Imran Habib
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
| | - Mossaraf Hossain
- Synthetic Organic Research Laboratory UGC-Human Resource Development Centre (Chemistry) University of North Bengal Siliguri Darjeeling 734013 India
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5
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Mukomura J, Nonaka H, Sato H, Kishimoto M, Arai M, Kotoku N. Anti-Mycobacterial N-(2-Arylethyl)quinolin-3-amines Inspired by Marine Sponge-Derived Alkaloid. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248701. [PMID: 36557834 PMCID: PMC9781020 DOI: 10.3390/molecules27248701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/03/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022]
Abstract
The synthesis and evaluation of simplified analogs of marine sponge-derived alkaloid 3-(phenethylamino)demethyl(oxy)aaptamine were performed to develop novel anti-mycobacterial substances. Ring truncation of the tricyclic benzo[de][1,6]-naphthyridine skeleton effectively weakened the cytotoxicity of the natural product, and the resulting AC-ring analog exhibited good anti-mycobacterial activity. A structure-activity relationship (SAR) study, synthesizing and evaluating some analogs, demonstrated the specificity and importance of the N-(2-arylethyl)quinolin-3-amine skeleton as a promising scaffold for anti-mycobacterial lead compounds.
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Affiliation(s)
- Junya Mukomura
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
| | - Hiroki Nonaka
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiromasa Sato
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Maho Kishimoto
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
| | - Masayoshi Arai
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoyuki Kotoku
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
- Correspondence: ; Tel.: +81-77-561-4920
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6
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Morozov V, Shklyaev Y. Metal‐Free Rapid Diastereoselective Construction of Isocryptolepine Core
via
Elecrophilic Dearomatization ‐ Inramolecular Michael Addition Sequence. ChemistrySelect 2022. [DOI: 10.1002/slct.202201709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vyacheslav Morozov
- Laboratory of Active Compounds Synthesis Institute of Technical Chemistry UB RAS Akademika Korolyeva St. 3 614013 Perm Russian Federation
| | - Yurii Shklyaev
- Laboratory of Active Compounds Synthesis Institute of Technical Chemistry UB RAS Akademika Korolyeva St. 3 614013 Perm Russian Federation
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Langer P. Palladium-Catalyzed Synthesis of Heterocyclic Ring Systems by Combination of Regioselective C–C with Twofold C–N Couplings. Synlett 2022. [DOI: 10.1055/s-0040-1719918] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThe combination of regioselective palladium-catalyzed C–C with twofold C–N couplings allows for the synthesis of a variety of heterocyclic ring systems. Starting materials include thiophenes and benzothiophenes, pyrroles and indoles, furans and benzofurans, pyridines, quinolines and quinoxalines, complex heterocyclic systems and benzophenone derivatives. The products are in many cases complex polyheterocyclic systems, which are not readily available by other methods or, in a number of cases, were not described in the literature before. They are of pharmacological relevance or interesting in the field of material science. Products include thieno[3,2-b:4,5-b′]diindoles, thieno[3,2-b]indoles, thieno[3,4-b]indoles, 5,10-dihydroindolo[3,2-b]indoles, furo[3,2-b:4,5-b′]diindoles, benzo[4,5]furo[3,2-b]indoles, 5,7-dihydropyrido[3,2-b:5,6-b′]diindoles, 5,7-dihydropyrido[2,3-b:6,5-b´]diindoles, α-, β-, γ- and δ-carbolines, indolo[3,2-b]quinolines, indolo[2,3-b]quinolines, indolo[3,2-c]quinolines, indoloquinoxalines, pyrido[2′,1′:2,3]imidazo[4,5-b]indoles, thiadiazolo[2′,3′:2,3]imidazo[4,5-b]indoles, benzo[b]carbazolediones, acridones and thieno[3,2-b]quinolones.Contents1 Introduction2 Thiophenes and Benzothiophenes3 Pyrroles and Indoles4 Furans and Benzofurans5 Pyridines6 Quinolines and Quinoxalines7 Complex Heterocyclic Systems8 2,3-Dibromonaphthoquinone9 Benzophenone Derivatives10 Conclusions
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Affiliation(s)
- Peter Langer
- Institut für Chemie, Universität Rostock
- Leibniz-Institut für Katalyse an der Universität Rostock e. V
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8
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Thongsornkleeb C, Tummatorn J, Ruchirawat S. A Compilation of Synthetic Strategies to Access the Most Utilized Indoloquinoline Motifs. Chem Asian J 2022; 17:e202200040. [PMID: 35132773 DOI: 10.1002/asia.202200040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/07/2022] [Indexed: 11/06/2022]
Abstract
Indoloquinoline alkaloids constitute an important class of aromatic heterocycles consisting of quinoline and indole fused together in various orientations. These compounds, both natural and synthetic, often display various bioactivities which have established them to be one of the interesting medicinal targets. This class of compounds have stimulated much interest among synthetic and medicinal chemists as evidenced by growth in the number of synthetic methods to prepare and study this class of alkaloids. This review compiles the synthetic strategies and methods currently known in the literature for the construction of four important indoloquinoline skeletons.
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Affiliation(s)
| | - Jumreang Tummatorn
- Chulabhorn Research Institute, Medicinal chemistry, 54 Kamphaeng Phet 6 Talat Bang Khen, 10210, Lak Si, THAILAND
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9
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Akitake M, Noda S, Miyoshi K, Sonoda M, Tanimori S. Access to γ-Carbolines: Synthesis of Isocryptolepine. J Org Chem 2021; 86:17727-17737. [PMID: 34866396 DOI: 10.1021/acs.joc.1c02026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A new method to synthesize γ-carboline derivatives has been developed starting from 3,5-dibromo-4-pyridinamine by monoarylation using the Suzuki-Miyaura cross-coupling reaction followed by the base-mediated ring closure to pyrrole formation. Synthesis of a series of γ-carboline derivations from the 4-brominated γ-carboline 4a has been achieved by employing various coupling reactions and N-alkylations. This method has been applied for the synthesis of the antimalarial and anticancer natural product isocryptolepine. The photophysical properties of novel γ-carboline derivations are also reported.
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Affiliation(s)
- Masahiro Akitake
- Department of Applied Biological Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Shizuki Noda
- Department of Applied Biological Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Kohei Miyoshi
- Department of Applied Biological Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Motohiro Sonoda
- Department of Applied Biological Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Shinji Tanimori
- Department of Applied Biological Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuencho, Nakaku, Sakai, Osaka 599-8531, Japan
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10
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Li XY, Wang DP, Li S, Xue WH, Qian XH, Liu KL, Li YH, Lin QQ, Dong G, Meng FH, Jian LY. Discovery of N-(1,3,4-thiadiazol-2-yl)benzamide derivatives containing a 6,7-methoxyquinoline structure as novel EGFR/HER-2 dual-target inhibitors against cancer growth and angiogenesis. Bioorg Chem 2021; 119:105469. [PMID: 34915285 DOI: 10.1016/j.bioorg.2021.105469] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/26/2021] [Accepted: 11/02/2021] [Indexed: 12/27/2022]
Abstract
Targeting EGFR and HER-2 is an essential direction for cancer treatment. Here, a series of N-(1,3,4-thiadiazol-2-yl)benzamide derivatives containing a 6,7-methoxyquinoline structure was designed and synthesized to serve as EGFR/HER-2 dual-target inhibitors. The kinase assays verified that target compounds could inhibit the kinase activity of EGFR and HER-2 selectively. The results of CCK-8 and 3D cell viability assays confirmed that target compounds had excellent anti-proliferation ability against breast cancer cells (MCF-7 and SK-BR-3) and lung cancer cells (A549 and H1975), particularly against SK-BR-3 cells, while the inhibitory effect on healthy breast cells (MCF-10A) and lung cells (Beas-2B) was weak. Among them, the hit compound YH-9 binded to EGFR and HER-2 stably in molecular dynamics studies. Further studies found thatYH-9could induce the release of cytochrome c and inhibit proliferation by promoting ROS expression in SK-BR-3 cells. Moreover,YH-9could diminish the secretion of VEGF and bFGF factors in SK-BR-3 cells, then inhibited tube formation and angiogenesis. Notably,YH-9could effectively inhibit breast cancer growth and angiogenesis with little toxicity in the SK-BR-3 cell xenograft model. Taken together,in vitroandin vivoresults revealed that YH-9 had high drug potential as a dual-target inhibitor of EGFR/HER-2 to inhibit breast cancer growth and angiogenesis.
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Affiliation(s)
- Xin-Yang Li
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang 110004, PR China; School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - De-Pu Wang
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang 110004, PR China; School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Shuai Li
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang 110004, PR China; School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Wen-Han Xue
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Xin-Hua Qian
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Kai-Li Liu
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Yu-Heng Li
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Qi-Qi Lin
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Gang Dong
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Fan-Hao Meng
- School of Pharmacy, China Medical University, Shenyang 110122, PR China
| | - Ling-Yan Jian
- Department of Pharmacy, Shengjing Hospital of China Medical University, Shenyang 110004, PR China.
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11
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Li M, Dong Y, Zhou C, Bai J, Cheng J, Sun J, Sun S. Iridium-Catalyzed Redox-Neutral C2 and C3 Dual C-H Functionalization of Indoles with Nitrones toward 7 H-Indolo[2,3- c]quinolines. Org Lett 2021; 23:8229-8234. [PMID: 34623158 DOI: 10.1021/acs.orglett.1c02975] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An iridium-catalyzed redox-neutral C-2 and C-3 dual C-H functionalization of indoles with nitrones has been developed, furnishing a range of 7H-indolo[2,3-c]quinolines with high efficiency and regioselectivity under mild reaction conditions. Notably, sequential multiple C-H bond cleavage and C-C bond formation constitute the key events of this process, in which nitrone serves as a building block and an oxidant. Distinct from the previous methods toward 7H-indolo[2,3-c]quinolines, this newly developed reaction features readily available substrates, operational simplicity, broad scope, good to high efficiency, and excellent regioselectivity.
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Affiliation(s)
- Miao Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Yaqun Dong
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Cong Zhou
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Junxue Bai
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiang Cheng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jianwei Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.,Department of Chemistry, the Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Song Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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12
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Bandyopadhyay D, Thirupathi A, Radhakrishnan D, Panigrahi A, Peruncheralathan S. Triflic acid-mediated N-heteroannulation of β-anilino-β-(methylthio)acrylonitriles: a facile synthesis of 4-amino-2-(methylthio)quinolines. Org Biomol Chem 2021; 19:8544-8553. [PMID: 34550145 DOI: 10.1039/d1ob01151k] [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
Various functionalised 4-amino-2-(methylthio)quinolines are synthesised through triflic acid-mediated N-heteroannulation of α-functionalized-β-anilino-β-(methylthio)acrylonitriles for the first time. The N-heteroannulation process is highly chemoselective and has mild reaction conditions. However, this process fails in the absence of the β-methylthio group in the acrylonitriles. In addition, a new double N-heteroannulation process is demonstrated to synthesise indolo[3,2-c]quinolines from non-heterocyclic precursors. Natural product isocryptolepine is synthesised in four steps from an acyclic precursor.
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Affiliation(s)
- Debashruti Bandyopadhyay
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatani, Khurda-752050, Odisha, India.
| | - Annaram Thirupathi
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatani, Khurda-752050, Odisha, India.
| | - Divya Radhakrishnan
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatani, Khurda-752050, Odisha, India.
| | - Adyasha Panigrahi
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatani, Khurda-752050, Odisha, India.
| | - S Peruncheralathan
- School of Chemical Sciences, National Institute of Science Education and Research Bhubaneswar, HBNI, Jatani, Khurda-752050, Odisha, India.
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13
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Aksenov DA, Arutyunov NA, Gasanova AZ, Aksenov NA, Aksenov AV, Lower C, Rubin M. Synthetic studies towards benzofuro[2,3-b]quinoline and 6H-indolo[2,3-b]quinoline cores: Total synthesis of norneocryptolepine and neocryptolepine. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Segler ALJ, Sigurdsson ST. A Carbazole-Derived Nitroxide That Is an Analogue of Cytidine: A Rigid Spin Label for DNA and RNA. J Org Chem 2021; 86:11647-11659. [PMID: 34410721 DOI: 10.1021/acs.joc.1c01176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A variety of semirigid and rigid spin labels comprise a valuable arsenal for measurements of biomolecular structures and dynamics by electron paramagnetic resonance (EPR) spectroscopy. Here, we report the synthesis and characterization of rigid spin labels Ċ and Ċm for DNA and RNA, respectively, that are carbazole-derived nitroxides and analogues of cytidine. Ċ and Ċm were converted to their phosphoramidites and used for their incorporation into oligonucleotides by solid-phase synthesis. Analysis of Ċ and Ċm by single-crystal X-ray crystallography verified their identity and showed little deviation from planarity of the nucleobase. Analysis of the continuous-wave (CW) EPR spectra of the spin-labeled DNA and RNA duplexes confirmed their incorporation into the nucleic acids and the line-shape was characteristic of rigid spin labels. Circular dichroism (CD) and thermal denaturation studies of the Ċ-labeled DNAs and Ċm-labeled RNAs indicated that the labels are nonperturbing of duplex structure.
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Affiliation(s)
- Anna-Lena Johanna Segler
- University of Iceland, Department of Chemistry, Science Institute, Dunhaga 3, 107 Reykjavik, Iceland
| | - Snorri Th Sigurdsson
- University of Iceland, Department of Chemistry, Science Institute, Dunhaga 3, 107 Reykjavik, Iceland
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15
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Ritu, Kumar S, Chauhan P, Jain N. Photoredox halogenation of quinolones: the dual role of halo-fluorescein dyes. Org Biomol Chem 2021; 19:4585-4592. [PMID: 33955445 DOI: 10.1039/d1ob00538c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient C-3 halogenation of quinolin-4-ones is reported with halogenated fluorescein dyes which serve both as a halogen source and photocatalyst. This reaction shows broad substrate scope and gives good to excellent yields of C-3 brominated/iodinated quinolones with eosin Y/rose bengal in green light under ambient conditions. The mechanistic investigations suggest a radical pathway involving the oxidative dehalogenation of the dye in the presence of air.
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Affiliation(s)
- Ritu
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India.
| | - Sharvan Kumar
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India.
| | - Parul Chauhan
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India.
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, New Delhi-110016, India.
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16
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Raju P, Saravanan V, Pavunkumar V, Mohanakrishnan AK. Pd(0)-Catalyzed Intramolecular Heck reaction of 2/3-Aryl(amino)methyl-3/2-bromoindoles: Syntheses of 3,4-Benzo[ c]-β-carbolines, Benzo[4,5]isothiazolo[2,3- a]indole 5,5-Dioxides, and 1,2-Benzo[ a]-γ-carbolines. J Org Chem 2021; 86:1925-1937. [PMID: 33395298 DOI: 10.1021/acs.joc.0c02152] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
One-pot synthesis of 3,4-benzo[c]-β-carbolines was achieved from 2-aryl(tosylamino)methyl-3-bromoindoles via 10 mol % Pd(OAc)2/PPh3-mediated intramolecular Heck coupling using K2CO3 as a base in DMF at 110 °C with concomitant aromatization through an elimination of tosylsulfinic acid. Under identical conditions, the isomeric 3-aryl(tosylamino)methyl-2-bromoindoles upon intramolecular Heck reaction furnished benzo[4,5]isothiazolo[2,3-a]indole 5,5-dioxides instead of the expected γ-carbolines. However, synthesis of the expected γ-carboline framework, 3-tosyl-6,9-dihydro-1,2-benzo[a]-γ-carbolines, could be achieved from 3-aryl(tosylamino)methyl-2-bromoindoles containing a mesitylene sulfonyl unit as a protecting group on the indole nitrogen.
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Affiliation(s)
- Potharaju Raju
- Department of Organic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Velu Saravanan
- Department of Organic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Vinayagam Pavunkumar
- Department of Organic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India
| | - Arasambattu K Mohanakrishnan
- Department of Organic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India
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17
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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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18
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Kavale AC, Kalbandhe AH, Opai IA, Jichkar AA, Karade NN. Oxidative ring expansion of 3-hydroxy-3-phenacyloxindoles using phenyliodine diacetate and molecular iodine: Synthesis of 2-hydroxy-2-aryl/alkyl-2,3-dihydroquinolin-4(1H)-ones. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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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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20
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Ali S, Wisal A, Tahir MN, Abdullah, Ali A, Hameed S, Ahmed MN. One-pot synthesis, crystal structure and antimicrobial activity of 6-benzyl-11-(p-tolyl)-6H-indolo[2,3-b]quinoline. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Thobokholt EN, Larghi EL, Bracca ABJ, Kaufman TS. Isolation and synthesis of cryptosanguinolentine (isocryptolepine), a naturally-occurring bioactive indoloquinoline alkaloid. RSC Adv 2020; 10:18978-19002. [PMID: 35518305 PMCID: PMC9054090 DOI: 10.1039/d0ra03096a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 05/04/2020] [Indexed: 11/28/2022] Open
Abstract
Cryptosanguinolentine (isocryptolepine) is one of the minor naturally-occurring monomeric indoloquinoline alkaloids, isolated from the West African climbing shrub Cryptolepis sanguinolenta. The natural product displays such a simple and unique skeleton, which chemists became interested in well before it was found in Nature. Because of its structure and biological activity, the natural product has been targeted for synthesis on numerous occasions, employing a wide range of different strategies. Hence, discussed here are aspects related to the isolation of isocryptolepine, as well as the various approaches toward its total synthesis.
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Affiliation(s)
- Elida N Thobokholt
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Enrique L Larghi
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Andrea B J Bracca
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
| | - Teodoro S Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR), Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario Suipacha 531 S2002LRK Rosario Argentina +54-341-4370477 +54-341-4370477
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22
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Debnath P. Recent Advances in the Hofmann Rearrangement and Its Application to Natural Product Synthesis. CURR ORG CHEM 2020. [DOI: 10.2174/1385272823666191021115508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
:
C-N bond formation reactions are the most important transformations in
(bio)organic chemistry because of the widespread occurrence of amines in pharmaceuticals,
natural products, and biologically active compounds. The Hofmann rearrangement is
a well-known method used for the preparation of primary amines from amides. But, the
traditional version of the Hofmann rearrangement often gave relatively poor yields due to
over-oxidation or due to the poor solubility of some amides in aqueous base, and created
an enormous amount of waste products. Developments over the last two decades, in particular,
have focused on refining both of these factors affecting the reaction. This review
covers both the description of recent advances (2000-2019) in the Hofmann
rearrangements and its applications in the synthesis of heterocycles, natural products and
complex molecules of biological interest. It is revealed that organo-catalytic systems especially hypervalent
iodine-based catalysts have been developed for the green and environmentally friendly conversion of
carboxamides to primary amines and carbamates.
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Affiliation(s)
- Pradip Debnath
- Department of Chemistry, Maharaja Bir Bikram College, Agartala, Tripura-799004, India
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23
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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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24
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Janke S, Boldt S, Ghazargan K, Ehlers P, Villinger A, Langer P. Synthesis of Benzoacridines and Benzophenanthridines by Regioselective Pd-Catalyzed Cross-Coupling Reactions Followed by Acid-Mediated Cycloisomerizations. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900913] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sophie Janke
- Institute of Chemistry; University Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
| | - Sebastian Boldt
- Institute of Chemistry; University Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
| | - Karapet Ghazargan
- Institute of Chemistry; Yerevan State University; 1 Alek Manukyan St 0025 Yerevan Armenia
| | - Peter Ehlers
- Institute of Chemistry; University Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institute for Catalysis at the University of Rostock e.V. (LIKAT); Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Alexander Villinger
- Institute of Chemistry; University Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
| | - Peter Langer
- Institute of Chemistry; University Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institute for Catalysis at the University of Rostock e.V. (LIKAT); Albert-Einstein-Str. 29a 18059 Rostock Germany
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25
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Marepu N, Gosi M, Vedula SS, Yeturu S, Pal M. Ultrasound-assisted Synthesis of 6-substituted indolo[2,3-b]quinolines: their Evaluation as Potential Cytotoxic Agents. Mini Rev Med Chem 2019; 19:599-608. [PMID: 30058486 DOI: 10.2174/1389557518666180727170055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 07/01/2018] [Accepted: 07/06/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND The indolo[2,3-b]quinoline framework is often found in various natural products displaying a range of pharmacological activities. This is an attractive template for the design and discovery of potential drugs especially for the identification of new anticancer agents. METHODS The synthesis of 6-substituted indolo[2,3-b]quinolones was undertaken and carried out using a ultrasound assisted method involving two sequential C-N bond forming reactions between 3-(2- bromophenyl)-2-chloroquinoline and amines in a single pot in the presence of Pd(OAc)2 and a ligand (S)-BINAP. All the synthesized compounds were tested in vitro against two cancer cell lines e.g. MCF7 and HepG2 along with non-cancerous HEK293 cell lines. RESULTS Two of these compounds showed promising and selective growth inhibition of MCF7 cell lines and one induced significant apoptosis in cancer (MCF7) cells. CONCLUSION Compounds based on indolo[2,3-b]quinolone framework may be useful for the identification of new cytotoxic agents thereby potential cure for breast cancer.
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Affiliation(s)
- Nagaraju Marepu
- Department of Chemistry, Acharya Nagarjuna University, Nagarjunanagar, Guntur-522510, India
| | - Mahesh Gosi
- Department of Chemistry, Acharya Nagarjuna University, Nagarjunanagar, Guntur-522510, India
| | | | - Sunandamma Yeturu
- Department of Chemistry, Acharya Nagarjuna University, Nagarjunanagar, Guntur-522510, India
| | - Manojit Pal
- Dr. Reddy's Institute of Life Sciences, University of Hyderabad Campus, Gachibowli, Hyderabad 500 046, India
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26
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Zhou Y, Xu XP, Ji SJ. Cooperation of Mn(III)/Brønsted Acid for the Synthesis of Quindoline Derivatives via Dehydroxylation/Azidation/Cyclization Cascade of Diaryl(1H-indol-2-yl)methanols with Trimethylsilyl Azide. Org Lett 2019; 21:2039-2042. [DOI: 10.1021/acs.orglett.9b00164] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Zhou
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Xiao-Ping Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
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27
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Yeh LH, Wang HK, Pallikonda G, Ciou YL, Hsieh JC. Palladium-Catalyzed Dual Annulation: A Method for the Synthesis of Norneocryptolepine. Org Lett 2019; 21:1730-1734. [DOI: 10.1021/acs.orglett.9b00287] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Hsuan Yeh
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan
| | - Hung-Kai Wang
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan
| | | | - Yu-Lun Ciou
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan
| | - Jen-Chieh Hsieh
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan
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28
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Wang Z, Li T, Xing S, Zhu B. Highly Efficient Construction of Pentacyclic Carboline-Containing Salts via a [Cp*RhCl2]2-Catalyzed Tandem Reaction. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhuo Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry; Tianjin Normal University; Tianjin 300387 People's Republic of China
| | - Tongyu Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry; Tianjin Normal University; Tianjin 300387 People's Republic of China
| | - Siyang Xing
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), 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, Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education (Tianjin Normal University), College of Chemistry; Tianjin Normal University; Tianjin 300387 People's Republic of China
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29
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Abstract
The present review provides a comprehensive overview of the synthetic methods developed
recently for 6H-Indolo[2,3-b]quinoline. The review is classified into the following: 1) inheriting indole
skeleton and constructing quinoline ring; 2) inheriting quinoline skeleton and constructing indole ring,
and 3) convergent strategies constructing both rings simultaneously or step by step. This review
discusses the scope of multifunctional reactivity of indole and quinoline skeleton for constructing the
desired indoloquinolines as explored in various research strategies.
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Affiliation(s)
- Hari K. Kadam
- Department of Chemistry, St. Xavier's College, Mapusa, Goa - 403507, India
| | - Santosh G. Tilve
- Department of Chemistry, Goa University, Taleigao Plateau, Goa - 403206, India
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30
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Rivera RP, Ehlers P, Rodríguez ET, Langer P. Synthesis of 7 H
-Indolo[2,3- c
]quinolines by Chemoselective Suzuki Reaction Followed by a Ring-Closing Two-Fold Buchwald-Hartwig Reaction of 3-Bromo-4-iodoquinoline. ChemistrySelect 2018. [DOI: 10.1002/slct.201802320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Rodisnel Perdomo Rivera
- Universität Rostock, Institut für Chemie; A.-Einstein-Str. 3a 18059 Rostock Germany
- University of Granma, Study Center of Applied Chemistry, Carretera de Manzanillo Km 17, 85100, Bayamo; Granma Cuba
| | - Peter Ehlers
- Universität Rostock, Institut für Chemie; A.-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; A.-Einstein-Str. 29a 18059 Rostock Germany
| | - Eugenio Torres Rodríguez
- University of Granma, Study Center of Applied Chemistry, Carretera de Manzanillo Km 17, 85100, Bayamo; Granma Cuba
| | - Peter Langer
- Universität Rostock, Institut für Chemie; A.-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz-Institut für Katalyse e.V. an der; Universität Rostock; A.-Einstein-Str. 29a 18059 Rostock Germany
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31
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Behera A, Sau P, Sahoo AK, Patel BK. Cyano-Sacrificial (Arylthio)arylamination of Quinoline and Isoquinoline N-Oxides Using N-(2-(Arylthio)aryl)cyanamides. J Org Chem 2018; 83:11218-11231. [PMID: 30102040 DOI: 10.1021/acs.joc.8b01797] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copper(I)-catalyzed regioselective arylthio-arylamination of quinoline and isoquinoline N-oxides has been achieved at the expense of a cyano (CN) group from N-(2-(arylthio)aryl)cyanamides. This reductive amination proceeds in one pot at 80 °C in the absence of any additives. This is a unique demonstration of aryl cyanamides serving as arylaminating agents on quinoline/isoquinoline N-oxides with concurrent autoreduction of N-oxide.
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Affiliation(s)
- Ahalya Behera
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati - 781039 , India
| | - Prasenjit Sau
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati - 781039 , India
| | - Ashish Kumar Sahoo
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati - 781039 , India
| | - Bhisma K Patel
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati - 781039 , India
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32
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Indium-Catalyzed Annulation of o-Acylanilines with Alkoxyheteroarenes: Synthesis of Heteroaryl[b]quinolines and Subsequent Transformation to Cryptolepine Derivatives. Molecules 2018; 23:molecules23040838. [PMID: 29621195 PMCID: PMC6017974 DOI: 10.3390/molecules23040838] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 03/25/2018] [Accepted: 03/31/2018] [Indexed: 12/30/2022] Open
Abstract
We disclose herein the first synthetic method that is capable of offering heteroaryl[b]quinolines (HA[b]Qs) with structural diversity, which include tricyclic and tetracyclic structures with (benzo)thienyl, (benzo)furanyl, and indolyl rings. The target HA[b]Q is addressed by the annulation of o-acylanilines and MeO–heteroarenes with the aid of an indium Lewis acid that effectively works to make two different types of the N–C and C–C bonds in one batch. A series of indolo[3,2-b]quinolines prepared here can be subsequently transformed to structurally unprecedented cryptolepine derivatives. Mechanistic studies showed that the N–C bond formation is followed by the C–C bond formation. The indium-catalyzed annulation reaction thus starts with the nucleophilic attack of the NH2 group of o-acylanilines to the MeO-connected carbon atom of the heteroaryl ring in an SNAr fashion, and thereby the N–C bond is formed. The resulting intermediate then cyclizes to make the C–C bond through the nucleophilic attack of the heteroaryl-ring-based carbon atom to the carbonyl carbon atom, providing the HA[b]Q after aromatizing dehydration.
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33
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Salman GA, Janke S, Pham NN, Ehlers P, Langer P. Convenient synthesis of 10 H -indolo[3,2- b ]quinolines and 6 H -indolo[2,3- b ]quinolines by sequential chemoselective Suzuki reaction followed by double C-N coupling. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.01.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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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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35
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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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36
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Zhang TY, Liu C, Chen C, Liu JX, Xiang HY, Jiang W, Ding TM, Zhang SY. Copper-Mediated Cascade C–H/N–H Annulation of Indolocarboxamides with Arynes: Construction of Tetracyclic Indoloquinoline Alkaloids. Org Lett 2017; 20:220-223. [DOI: 10.1021/acs.orglett.7b03580] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | | | | | | | | | - Wei Jiang
- School of Chemistry & Environmental Engineering, International Healthcare Innovation Institute, Wuyi University, Jiangmen 529020, China
| | | | - Shu-Yu Zhang
- School of Chemistry & Environmental Engineering, International Healthcare Innovation Institute, Wuyi University, Jiangmen 529020, China
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37
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Pham NN, Janke S, Salman GA, Dang TT, Le TS, Spannenberg A, Ehlers P, Langer P. Convenient Synthesis of 11-Substituted 11H
-Indolo[3,2-c
]quinolines by Sequential Chemoselective Suzuki Reaction/Double C-N Coupling. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700913] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ngo Nghia Pham
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institut für Katalyse an der Universität Rostock e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
- Faculty of Chemistry; VNU University of Science Hanoi (VNU-HUS); 19 Le Thanh Tong, Hoan Kiem Hanoi Vietnam
| | - Sophie Janke
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institut für Katalyse an der Universität Rostock e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Ghazwan Ali Salman
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Department of Chemistry; College of Science; University Al-Mustansiriyah; Palestine St, Mustansiriya Baghdad Iraq
| | - Tuan Thanh Dang
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
| | - Thanh Son Le
- Faculty of Chemistry; VNU University of Science Hanoi (VNU-HUS); 19 Le Thanh Tong, Hoan Kiem Hanoi Vietnam
| | - Anke Spannenberg
- Leibniz Institut für Katalyse an der Universität Rostock e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Peter Ehlers
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institut für Katalyse an der Universität Rostock e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Peter Langer
- Institut für Chemie; Universität Rostock; Albert-Einstein-Str. 3a 18059 Rostock Germany
- Leibniz Institut für Katalyse an der Universität Rostock e.V.; Albert-Einstein-Str. 29a 18059 Rostock Germany
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38
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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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39
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Ali W, Dahiya A, Pandey R, Alam T, Patel BK. Microwave-Assisted Cascade Strategy for the Synthesis of Indolo[2,3-b]quinolines from 2-(Phenylethynyl)anilines and Aryl Isothiocynates. J Org Chem 2017; 82:2089-2096. [DOI: 10.1021/acs.joc.6b02912] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Wajid Ali
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Anjali Dahiya
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Ramdhari Pandey
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tipu Alam
- Department
of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Bhisma K. Patel
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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40
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Méndez MV, Heredia DA, Larghi EL, Bracca ABJ, Kaufman TS. Efficient total synthesis of neocryptolepine and synthetic access to 6-methylquinindoline from a common intermediate. RSC Adv 2017. [DOI: 10.1039/c7ra05349e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The total synthesis of neocryptolepine and the synthesis of its non-natural isomer 6-methyl quinindoline were efficiently achieved in a few steps from a common intermediate.
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41
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Wang D, Zhao J, Wang Y, Hu J, Li L, Miao L, Feng H, Désaubry L, Yu P. A General and Efficient Synthesis of 2-Pyridones, 2-Quinolinones, and 1-Isoquinolinones from Azine N
-Oxides. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600430] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Dong Wang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Junjie Zhao
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Yuxi Wang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Jianyong Hu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Linna Li
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Longfei Miao
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Hairong Feng
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
| | - Laurent Désaubry
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
- Laboratory of Therapeutic Innovation (UMR 7200); Faculty of Pharmacy; University of Strasbourg-CNRS; Illkirch France
| | - Peng Yu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry; Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education; Tianjin Key Laboratory of Industry Microbiology; College of Biotechnology; Tianjin University of Science and Technology; No. 29, 13th Avenue, TEDA Tianjin 300457 China
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42
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Wang D, Wang Y, Zhao J, Li L, Miao L, Wang D, Sun H, Yu P. A highly practical and convenient halogenation of fused heterocyclic N-oxides. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.083] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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43
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Gao W, Fu X, Zhang X, Zhao Y, Wang D, Li Y. A new entry to synthesis of neocryptolepine related skeletons. An unexpected behavior of 3-acety-2-ethoxyindole and isatins. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.07.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Wang X, Wang X, Huang D, Liu C, Wang X, Hu Y. Synthesis of 3-Iodoquinolines by Copper-Catalyzed Tandem Annulation from Diaryliodoniums, Nitriles, and 1-Iodoalkynes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600081] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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45
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Volvoikar PS, Tilve SG. Iodine-Mediated Intramolecular Dehydrogenative Coupling: Synthesis of N-Alkylindolo[3,2-c]- and -[2,3-c]quinoline Iodides. Org Lett 2016; 18:892-5. [DOI: 10.1021/acs.orglett.5b03392] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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46
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OMAR WALAAAE, HORMI OSMOEO. Synthesis of Novel 5-(N-Substituted-Anilino)-8-Hydroxyquinolines via Hartwig-Buchwald Amination Reaction. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0960-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Liu J, Li Z, Tong P, Xie Z, Zhang Y, Li Y. TMSI-Promoted Vinylogous Michael Addition of Siloxyfuran to 2-Substituted Chromones: A General Approach for the Total Synthesis of Chromanone Lactone Natural Products. J Org Chem 2015; 80:1632-43. [DOI: 10.1021/jo502571r] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jie Liu
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
| | - Zhanchao Li
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
| | - Pei Tong
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
| | - Zhixiang Xie
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
| | - Yuan Zhang
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
| | - Ying Li
- State Key Laboratory of Applied
Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui South Road, Lanzhou 730000, People’s Republic of China
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48
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Nowacki M, Wojciechowski K. Simple synthesis 11-substituted norcryptotackieine derivatives. RSC Adv 2015. [DOI: 10.1039/c5ra18626a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
11-Substituted indolo[2,3-b]quinolines were obtained in reactions ofN-protected indol-3-yl-acetonitrile, -acetate, and -methylsulfone with nitrobenzene derivatives in presence of base and trialkylchlorosilanes.
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Affiliation(s)
- Michał Nowacki
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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49
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Cincinelli R, Musso L, Beretta G, Dallavalle S. 4-Quinolone fused heterocyclic ring systems by intramolecular reactions of 4-quinolone-2-carboxamides. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.11.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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50
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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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