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Mohanty SR, Pati BV, Banjare SK, Das Adhikari GK, Ravikumar PC. Redox-Neutral Cobalt(III)-Catalyzed C–H Activation/Annulation of α,β-Unsaturated Oxime Ether with Alkyne: One-Step Access to Multisubstituted Pyridine. J Org Chem 2020; 86:1074-1083. [DOI: 10.1021/acs.joc.0c02558] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Smruti Ranjan Mohanty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Bedadyuti Vedvyas Pati
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, Jatni, Khurda, Odisha 752050, India
| | - Ponneri Chandrababu Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, Jatni, Khurda, Odisha 752050, India
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Pailee P, Prawat H, Ploypradith P, Mahidol C, Ruchirawat S, Prachyawarakorn V. Atalantiaphyllines A-G, prenylated acridones from Atalantia monophylla DC. and their aromatase inhibition and cytotoxic activities. PHYTOCHEMISTRY 2020; 180:112525. [PMID: 33010534 DOI: 10.1016/j.phytochem.2020.112525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/10/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
Seven previously undescribed acridones, named atalantiaphyllines A-G, along with twenty-six known compounds were isolated from the dichloromethane extracts of roots and stems of Atalantia monophylla DC. Their structures were elucidated by analysis of extensive NMR and HRMS data. Aromatase inhibition, cytotoxicity against MOLT-3, HepG2, A549 and HuCCA-1 cell lines and DPPH radical scavenging activity of these compounds were evaluated. Most of the tested acridones exhibited higher potency in inhibiting aromatase than the positive control, ketoconazole, with IC50 values in the range of 0.08-2.0 μM. In the cytotoxicity assay, cycloataphylline A, N-methylbuxifoliadine E and atalantiaphylline G were selectively cytotoxic against MOLT-3 cell line with IC50 values of 8.0, 5.4 and 9.8 μM, respectively, while only atalaphyllidine exhibited highest antioxidant activity as evaluated by DPPH free radical scavenging assay with an IC50 value of 22.4 μM.
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Affiliation(s)
- Phanruethai Pailee
- Laboratory of Natural Products, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand
| | - Hunsa Prawat
- Laboratory of Natural Products, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand
| | - Poonsakdi Ploypradith
- Laboratory of Medicinal chemistry, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand; Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), CHE, Ministry of Education, Bangkok, 10400, Thailand
| | - Chulabhorn Mahidol
- Laboratory of Natural Products, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand; Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand
| | - Somsak Ruchirawat
- Laboratory of Medicinal chemistry, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand; Program in Chemical Sciences, Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand; Center of Excellence on Environmental Health and Toxicology (EHT), CHE, Ministry of Education, Bangkok, 10400, Thailand
| | - Vilailak Prachyawarakorn
- Laboratory of Natural Products, Chulabhorn Research Institute, Kamphaeng Phet 6 Road, Laksi, Bangkok, 10210, Thailand.
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Tan JF, Bormann CT, Perrin FG, Chadwick FM, Severin K, Cramer N. Divergent Synthesis of Densely Substituted Arenes and Pyridines via Cyclotrimerization Reactions of Alkynyl Triazenes. J Am Chem Soc 2019; 141:10372-10383. [PMID: 31244170 DOI: 10.1021/jacs.9b04111] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Densely substituted fused aromatic triazenes can be prepared by [2 + 2 + 2] cyclotrimerization reactions of 1-alkynyl triazenes. The Cp*Ru-catalyzed cyclization proceeds well with both simple alkynyl triazenes and tethered 1-diynyl triazenes. Attractively, the methodology can be extended to pyridine synthesis by replacing an alkyne with a nitrile. The reaction is regioselective and yields the sterically more hindered product. The triazene group precisely installed on the synthesized aryl and pyridyl ring is a highly versatile moiety, which is effortlessly converted into the most important and frequently used functional aryl substituents, including fluorides. It is also suited for intramolecular transformations to afford a variety of valuable heterocycles. The coordination chemistry of alkynyl triazenes and Cp*RuCl was studied and led to the structural characterization of a Cp*RuCl(η2-alkyne) complex, a Cp*RuCl(η4-cyclobutadiene) complex, and an unusual dinuclear Ru complex with a bridging tetramethylfulvene ligand. Complexes of this type are potentially involved in catalyst deactivation pathways.
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Affiliation(s)
- Jin-Fay Tan
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Carl T Bormann
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Florian G Perrin
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - F Mark Chadwick
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Kay Severin
- Laboratory of Supramolecular Chemistry, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric Catalysis and Synthesis, Institute of Chemical Sciences and Engineering , Ecole Polytechnique Fédérale de Lausanne (EPFL) , 1015 Lausanne , Switzerland
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Khaja Mohinuddin PM, Dada R, Almansour AI, Arumugam N, Yaragorla S. Ca(II)-catalyzed diastereoselective formal [4+2] annulation of a 3-component solvent-free povarov reaction. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Thigulla Y, Ranga S, Ghosal S, Subbalakshmi J, Bhattacharya A. One-Pot Two Step Nazarov-Schmidt Rearrangement for the Synthesis of Fused δ-Lactam Systems. ChemistrySelect 2017. [DOI: 10.1002/slct.201701848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yadagiri Thigulla
- Department of Chemistry; Birla Institute of Technology and Science-Pilani (Hyderabad Campus); Hyderabad- 500078 India
| | - Santosh Ranga
- Department of Chemistry; Birla Institute of Technology and Science-Pilani (Hyderabad Campus); Hyderabad- 500078 India
| | - Subhas Ghosal
- Department of Chemistry; Birla Institute of Technology and Science-Pilani (Hyderabad Campus); Hyderabad- 500078 India
| | - Jayanty Subbalakshmi
- Department of Chemistry; Birla Institute of Technology and Science-Pilani (Hyderabad Campus); Hyderabad- 500078 India
| | - Anupam Bhattacharya
- Department of Chemistry; Birla Institute of Technology and Science-Pilani (Hyderabad Campus); Hyderabad- 500078 India
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Coulerie P, Poullain C. New Caledonia: A ' Hot Spot' for Valuable Chemodiversity: Part 2: Basal Angiosperms and Eudicot Rosids. Chem Biodivers 2016; 13:18-36. [PMID: 26765350 DOI: 10.1002/cbdv.201400389] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/13/2015] [Indexed: 11/07/2022]
Abstract
The flora of New Caledonia encompasses more than 3000 plant species and almost 80% are endemic. New Caledonia is considered as a 'hot spot' for biodiversity. With the current global loss of biodiversity and the fact that several drugs and pesticides become obsolete, there is an urgent need to increase sampling and research on new natural products. In this context, we review the chemical knowledge available on New Caledonian native flora from economical perspectives. We expect that a better knowledge of the economic potential of plant chemistry will encourage the plantation of native plants for the development of a sustainable economy which will participate in the conservation of biodiversity. In the second part of this review, we focus on the results exposed in 60 scientific articles and describe the identification of 225 original compounds from basal angiosperms and eudicot rosids. We discuss the economic potential of plants and molecules from medicinal and industrial perspectives. This review also highlights several plants and groups, such as Amborella sp., Piperaceae, or Phyllanthaceae, that are unexplored in New Caledonia despite their high chemical interest. Those plants are considered to have priority in future chemical investigations.
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Affiliation(s)
- Paul Coulerie
- Institut Agronomique néo-Calédonien, Connaissance et Amélioration des Agrosystèmes, BP A5, 98848 Noumea Cedex, New Caledonia. .,School of Pharmaceutical Sciences, University of Geneva, 30, Quai Ernest-Ansermet, CH-1211 Geneva 4, (phone: +41-22-3793409).
| | - Cyril Poullain
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Labex LERMIT, 1 Avenue de la Terrasse, FR-91198 Gif-sur-Yvette Cedex.,Stratoz, 5, Rue de la Baume, FR-75008 Paris
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Silva VL, Silva AM. New synthetic methods for 2,3-diarylacridin-9(10H)-one and (E)-2-aryl-4-styrylfuro[3,2-c]quinoline derivatives. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Sridharan V, Suryavanshi PA, Menéndez JC. Advances in the chemistry of tetrahydroquinolines. Chem Rev 2011; 111:7157-259. [PMID: 21830756 DOI: 10.1021/cr100307m] [Citation(s) in RCA: 765] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Vellaisamy Sridharan
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, Madrid, Spain
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Chosson E, Guguen-Guillouzo C, Glaise D, Picot L, Seguin E, Besson T. Cytotoxic evaluation of sarcodifurines A and B, two novel dihydrofuroquinolines from Sarcomelicope follicularis (Rutaceae). J Enzyme Inhib Med Chem 2008; 23:704-7. [PMID: 18608759 DOI: 10.1080/14756360802208111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Sarcodifurines A and B are two original dihydrofuroquinolines isolated from Sarcomelicope follicularis, a New Caledonian tree. The cytotoxicity and antiproliferative activity of these two alkaloids were investigated against 8 distinct cell lines representative of the most frequent solid tumors developing in human. Cytotoxicity of sarcodifurines was low on the 8 cell lines, with, for example, less than 10% of the total cells killed after 24 h exposure at 10 microM and IC(50) approximately 7.10(-5) M (MCF-7 and MDA MB 231 cell lines). Proliferation studies confirmed that sarcodifurines had a weak effect on cancer cells growth, with less than 5% growth inhibition at 10 microM. Sarcodifurine A activity was comparable to that of Sarcodifurine B, in term of cytotoxicity and antiproliferative activity on all cell lines. In spite of the weak activity of sarcodifurines and furoquinolines, rationalized pharmacomodulations to obtain planar analogs could lead to efficient topoisomerases inhibitors and DNA intercalants.
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Affiliation(s)
- Elizabeth Chosson
- Université de Rouen, CNRS UMR 6014, C.O.B.R.A. - I.R.C.O.F., UFR Méédecine-Pharmacie, Rouen Cedex 1, France.
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Mitaku S, Fokialakis N, Magiatis P, Tillequin F. Alkaloids from Sarcomelicope megistophylla. Fitoterapia 2007; 78:169-70. [PMID: 17207940 DOI: 10.1016/j.fitote.2006.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2005] [Accepted: 10/25/2006] [Indexed: 10/23/2022]
Abstract
Two new alkaloids were isolated from the bark of Sarcomelicope megistophylla. Cyclomegistine B (1), a new quinolone alkaloid, that possesses a rare cyclobuta[b]quinoline ring system and sarcomejine B (2) which is a quinolone alkaloid with an unusual side chain. The structure of both compounds was elucidated on the basis of MS data and extensive NMR studies.
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Affiliation(s)
- Sofia Mitaku
- Department of Pharmacognosy and Chemistry of Natural Products, Faculty of Pharmacy, University of Athens, Athens 15771, Greece.
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NISHIHAMA Y, AMANO Y, OGAMINO T, NISHIYAMA S. Oxidation of Mangostins, the Naturally Occurring Xanthone Derivatives Carrying Diverse Biological Activities. ELECTROCHEMISTRY 2006. [DOI: 10.5796/electrochemistry.74.609] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Fokialakis N, Magiatis P, Chinou I, Mitaku S, Tillequin F. Megistoquinones I and II, two quinoline alkaloids with antibacterial activity from the bark of Sarcomelicope megistophylla. Chem Pharm Bull (Tokyo) 2002; 50:413-4. [PMID: 11911210 DOI: 10.1248/cpb.50.413] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two alkaloids, megistoquinone I (1) and megistoquinone II (2), were isolated from the bark of Sarcomelicope megistophylla. Their structures have been elucidated on the basis of MS and NMR data. Both belong to quinoline alkaloid series and should be considered as oxidation products of a furo[2,3-b]quinoline precursor. The two alkaloids showed antibacterial properties with minimum inhibitory concentration (MIC) ranging from 2.35 to 5.25 mg/ml for 1 and 0.73 to 1.23 mg/ml for 2.
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Fokialakis N, Magiatis P, Terzis A, Tillequin F, Skaltsounis AL. Cyclomegistine, the first alkaloid with the new cyclobuta[b]quinoline ring system from Sarcomelicope megistophylla. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00990-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Fokialakis N, Magiatis P, Aligiannis N, Mitaku S, Tillequin F, Sévenet T. Furomegistines I and II, two furanopyridine alkaloids from the bark of Sarcomelicope megistophylla. PHYTOCHEMISTRY 2001; 57:593-596. [PMID: 11394864 DOI: 10.1016/s0031-9422(01)00065-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Two alkaloids, furomegistine I (1) and furomegistine II (2), were isolated from the bark of Sarcomelicope megistophylla. Their structures have been elucidated on the basis of MS and NMR data. Both belong to the category of furanopyridine alkaloids and should be considered as oxidation products of a furo[2,3-b]quinoline precursor. The two alkaloids exhibited moderate cytotoxic activity.
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Affiliation(s)
- N Fokialakis
- Department of Pharmacy, University of Athens, Greece
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Fokialakis N, Magiatis P, Skaltsounis AL, Tillequin F, Sévenet T. The structure of sarcomejine: an application of long-range (1)H-(15)N correlation at natural abundance. JOURNAL OF NATURAL PRODUCTS 2000; 63:1004-1005. [PMID: 10924187 DOI: 10.1021/np000083x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new 4(1H)-quinolinone alkaloid, sarcomejine (1), has been isolated from the bark of Sarcomelicope megistophylla. Its structure has been elucidated on the basis of MS and NMR data and especially with a long-range (1)H-(15)N correlation NMR spectrum at natural abundance.
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Affiliation(s)
- N Fokialakis
- Laboratory of Pharmacognosy, Department of Pharmacy, University of Athens Panepistimiopolis Zografou, GR-15771 Athens, Greece
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