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Håheim KS, Sydnes MO. Regiodivergent Synthesis and Biological Activities of Indoloquinoline Based Compounds. CHEM REC 2024; 24:e202300362. [PMID: 38319822 DOI: 10.1002/tcr.202300362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/15/2024] [Indexed: 02/08/2024]
Abstract
Cryptolepine, neocryptolepine, and isocryptolepine have remained popular synthetic targets ever since their isolation from the aqueous extracts of the West African climbing shrub Cryptolepis sanguinolenta. These natural alkaloids were found to contain significant antimalarial, antiproliferative and antimicrobial activities, making them ideal starting points for the development of novel drug candidates. As natural product synthesis is often plagued with step-heavy procedures and poor atom economy, the discovery of synthetic protocols addressing these concerns are sorely needed. In our laboratories, we have devoted our efforts into the development of regiodivergent synthesis whereby two of the indoloquinoline natural products, namely neocryptolepine and 11H-indolo[3,2-c]quinolines, could be assembled in only a few steps from a common and readily available starting material. Our synthetic endeavors to meet these goals include a cascade palladium-catalyzed Suzuki-Miyuara cross-coupling and intramolecular C-N bond formation and a photochemical nitrene insertion strategy. Furthermore, our methods also allowed for the construction of several diversely functionalized natural product derivatives which were subjected to biological evaluations.
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Affiliation(s)
- Katja S Håheim
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, NO.4036, Stavanger, Norway
| | - Magne O Sydnes
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, NO.4036, Stavanger, Norway
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Li D, Yang R, Wu J, Zhong B, Li Y. Comprehensive review of α-carboline alkaloids: Natural products, updated synthesis, and biological activities. Front Chem 2022; 10:988327. [PMID: 36092663 PMCID: PMC9459053 DOI: 10.3389/fchem.2022.988327] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/01/2022] [Indexed: 12/03/2022] Open
Abstract
α-carboline (9H-pyrido[2,3-b]indole), contains a pyridine ring fused with an indole backbone, is a promising scaffold for medicinal chemistry. In recent decades, accumulating evidence shows that α-carboline natural products and their derivatives possess diverse bioactivities. However, hitherto, there is no comprehensive review to systematically summarize this important class of alkaloids. In this perspective, this paper represents the first review to provide a comprehensive description of α-carbolines including natural products, updated literature of synthesis, and their diverse biological activities. Their biological activities including antitumor, anti-microbial, anti-Alzheimer’s disease, anti-atherosclerosis, and antioxidant activities were hilighted. And the targets and the main structure activity relationships (SARs) will be presented. Finally, challenges and future directions of this class of compounds will be discussed. This review will be helpful in understanding and encouraging further exploration for this group of alkaloids.
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Affiliation(s)
- Deping Li
- Department of Pharmacy, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Ganzhou Key Laboratory of Immunotherapeutic Drugs Developing for Childhood Leukemia, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Renze Yang
- Department of Pharmacy, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Jun Wu
- Department of Pharmacy, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Bin Zhong
- Department of Pharmacy, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- Ganzhou Key Laboratory of Immunotherapeutic Drugs Developing for Childhood Leukemia, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Yan Li
- Department of Pharmacy, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- *Correspondence: Yan Li,
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Altwaijry N, El-Ghlban S, El Sayed IET, El-Bahnsawye M, Bayomi AI, Samaka RM, Shaban E, Elmongy EI, El-Masry TA, Ahmed HMA, Attallah NGM. In Vitro and In Vivo Antitumor Activity of Indolo[2,3- b] Quinolines, Natural Product Analogs from Neocryptolepine Alkaloid. Molecules 2021; 26:754. [PMID: 33535575 PMCID: PMC7867085 DOI: 10.3390/molecules26030754] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 01/24/2021] [Accepted: 01/26/2021] [Indexed: 11/27/2022] Open
Abstract
Neocryptolepine (5-methyl-5H-indolo[2,3-b] quinoline) analogs were synthesized and evaluated in vitro and in vivo for their effect versus Ehrlich ascites carcinoma (EAC). The analogs showed stronger cytotoxic activity against EAC cells than the reference drug. The in vivo evaluation of the target compounds against EAC-induced solid tumor in the female albino Swiss mice revealed a remarkable decrease in the tumor volume (TV) and hepatic lipid peroxidation. A noticeable increase of both superoxide dismutase (SOD) and catalase (CAT) levels was reported (p < 0.001), which set-forth proof of their antioxidant effect. In addition, the in vitro antioxidant activity of the neocryptolepine analogs was screened out using the DPPH method and showed promising activities activity. The histopathological investigations affirmed that the tested analogs have a remarkable curative effect on solid tumors with minimal side-effect on the liver. The study also includes illustrated mechanism of the antitumor activity at the cell level by flow cytometry. The cell cycle analysis showed that the neocryptolepine analogs extensively increase the aggregation of tumor cells in three phases of the cell cycle (G0/G1, S and G2/M) with the emergence of a hypo-diploid DNA content peak (sub-G1) in the cell cycle experiments, which is a clear-cut for the apoptotic cell population. Furthermore, the immunological study manifested a significant elevation in splenic lymphocyte count (p < 0.001) with the elevation of the responsiveness of lymphocytes to phytohemagglutinin (PHA). These results indicate that these naturally-based neocryptolepine alkaloids exhibit marked antitumor activity in vivo and represent an important lead in the development of natural-based anticancer drugs.
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Affiliation(s)
- Najla Altwaijry
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh P.O. Box 84428, Saudi Arabia; (N.A.); (E.I.E.); (T.A.E.-M.); (N.G.M.A.)
| | - Samah El-Ghlban
- Department of Chemistry, Faculty of Science, Menoufia University, Shebin El Koom P.O. Box 32511, Egypt; (S.E.-G.); (M.E.-B.)
| | - Ibrahim E.-T. El Sayed
- Department of Chemistry, Faculty of Science, Menoufia University, Shebin El Koom P.O. Box 32511, Egypt; (S.E.-G.); (M.E.-B.)
| | - Mohamed El-Bahnsawye
- Department of Chemistry, Faculty of Science, Menoufia University, Shebin El Koom P.O. Box 32511, Egypt; (S.E.-G.); (M.E.-B.)
| | - Asmaa I. Bayomi
- Department of Zoology, Faculty of Science, Menoufia University, Shebin El Koom P.O. Box 32511, Egypt;
| | - Rehab M. Samaka
- Department of Pathology, Faculty of Medicine, Menoufia University, Shebin El Koom P.O. Box 32511, Egypt;
| | - Elkhabiry Shaban
- Dyeing, Printing and Textile Auxiliaries Department, Textile Research Division, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. Box 12622, Egypt;
| | - Elshaymaa I. Elmongy
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh P.O. Box 84428, Saudi Arabia; (N.A.); (E.I.E.); (T.A.E.-M.); (N.G.M.A.)
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Helwan University, Ain Helwan, Cairo P.O. Box 11795, Egypt
| | - Thanaa A. El-Masry
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh P.O. Box 84428, Saudi Arabia; (N.A.); (E.I.E.); (T.A.E.-M.); (N.G.M.A.)
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tanta University, Tanta P.O. Box 31527, Egypt
| | - Hytham M. A. Ahmed
- Pharmaceutical Analysis Department, Faculty of Pharmacy, Menoufia University, Shebin El Koom P.O. Box 32511, Menoufia, Egypt;
| | - Nashwah G. M. Attallah
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, Riyadh P.O. Box 84428, Saudi Arabia; (N.A.); (E.I.E.); (T.A.E.-M.); (N.G.M.A.)
- National Organization of Drug Control and Research (NODCAR), Giza P.O. Box 29 Pyramids, Egypt
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Mekheimer RA, Al-Sheikh MA, Medrasi HY, Sadek KU. Advancements in the synthesis of fused tetracyclic quinoline derivatives. RSC Adv 2020; 10:19867-19935. [PMID: 35520416 PMCID: PMC9054245 DOI: 10.1039/d0ra02786c] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/07/2020] [Indexed: 11/21/2022] Open
Abstract
Fused tetracyclic systems containing a quinoline nucleus represent an important class of heterocyclic bioactive natural products and pharmaceuticals because of their significant and wide-spectrum biological properties. Several of these compounds have been obtained with diverse pharmacological and biological activities, such as antiplasmodial, antifungal, antibacterial, potent antiparasitic, antiproliferative, anti-tumor and anti-inflammatory activities. This information will be beneficial for medicinal chemists in the field of drug discovery to design and synthesize new fused tetracyclic quinolines as potent therapeutical agents. This review article provides a comprehensive report regarding the methods developed for the synthesis of fused tetracyclic quinolines reported so far (till October 2019). The article includes synthesis by one-pot domino reaction, microwave synthesis using a catalyst, using ionic liquids, photocatalytic synthesis (UV radiation), Pfitzinger reaction, I2-catalyzed cyclization reaction, Wittig reaction, cascade reaction, imino Diels-Alder reaction, Friedel-Crafts reaction, CDC reaction, solvent-free reactions and using small chiral organic molecules as catalysts. To the best of our knowledge, this is the first review focused on the synthesis of fused tetracyclic quinolines along with mechanistic aspects.
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Affiliation(s)
- Ramadan A Mekheimer
- Department of Chemistry, Faculty of Science, Minia University Minia 61519 Egypt
| | - Mariam A Al-Sheikh
- Department of Chemistry, Faculty of Science, University of Jeddah Jeddah 21589 Saudi Arabia
| | - Hanadi Y Medrasi
- Department of Chemistry, Faculty of Science, University of Jeddah Jeddah 21589 Saudi Arabia
| | - Kamal U Sadek
- Department of Chemistry, Faculty of Science, Minia University Minia 61519 Egypt
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Synthesis and antiproliferative activity of new hybrids bearing neocryptolepine, acridine and α-aminophosphonate scaffolds. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-019-01849-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mekheimer RA, Al-Sheikh MA, Medrasi HY, Bahatheg GA, Sadek KU. Chloroquinoline-3-carbonitriles: Synthesis and Reactions. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190516120946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We herein describe the first review which aims to focus soberly the various
synthetic methods and chemical reactions of chloroquinoline-3-carbonitrile derivatives.
The reactions are subdivided into groups that cover reactions of chloro substituent at 2 or
4 and 2,4 positions, as well as cyano substituent at 3 position and reactions which involve
both groups. Most types of reactions have been successfully applied and used in the production
of biologically active compounds.
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Affiliation(s)
- Ramadan A. Mekheimer
- Department of Chemistry, Faculty of Science, Minia University, Minia 61519, Egypt
| | - Mariam A. Al-Sheikh
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Hanadi Y. Medrasi
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Ghayah A. Bahatheg
- Department of Chemistry, Faculty of Science, University of Jeddah, P.O. Box 80327, Jeddah 21589, Saudi Arabia
| | - Kamal U. Sadek
- Department of Chemistry, Faculty of Science, Minia University, Minia 61519, Egypt
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Structural Modifications of Nature-Inspired Indoloquinolines: A Mini Review of Their Potential Antiproliferative Activity. Molecules 2019; 24:molecules24112121. [PMID: 31195640 PMCID: PMC6600460 DOI: 10.3390/molecules24112121] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/27/2019] [Accepted: 06/01/2019] [Indexed: 02/04/2023] Open
Abstract
Cryptolepine, neocryptolepine and isocryptolepine are naturally occurring indoloquinoline alkaloids with various spectrum of biological properties. Structural modification is an extremely effective means to improve their bioactivities. This review enumerates several neocryptolepine and isocryptolepine analogues with potent antiproliferative activity against MV4-11 (leukemia), A549 (lung cancer), HCT116 (colon cancer) cell lines in vitro. Its activity towards normal mouse fibroblasts BALB/3T3 was also evaluated. Furthermore, structure activity relationships (SAR) are briefly discussed. The anticancer screening of neocryptolepine derivatives was performed in order to determine their cytotoxic and growth inhibitory activities across the JFCR39 cancer cell line panel.
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