1
|
Worayuthakarn R, Suddee N, Theppitak C, Chainok K, Ruchirawat S, Thasana N. Cascade Cyclization of o-(2-Acyl-1-ethynyl)benzaldehydes with Amino Acid Derivatives: Synthesis of Indeno[2,1- c]pyran-3-ones and 1-Oxazolonylisobenzofurans via the Erlenmeyer-Plöchl Azlactone Reaction. ACS OMEGA 2024; 9:37814-37842. [PMID: 39281931 PMCID: PMC11391571 DOI: 10.1021/acsomega.4c03842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 08/05/2024] [Accepted: 08/16/2024] [Indexed: 09/18/2024]
Abstract
A highly regioselective divergent approach is reported for the synthesis of both indeno[2,1-c]pyran-3-one and 1-oxazolonylisobenzofuran derivatives using the Erlenmeyer-Plöchl azlactone (EPA) reaction. This approach involves the synthesis of o-(2-acyl-1-ethynyl)benzaldehydes, which reacted with various amino acids. Reaction with N-acylglycines resulted in the formation of indeno[2,1-c]pyran-3-ones, involving the sequential formation of two C-C bonds and two C-O bonds. Conversely, when the same conditions were applied to free amino acids, 1-oxazolonylisobenzofurans were obtained. This reaction involved the formation of a C-C bond between oxazolone and o-(2-acyl-1-ethynyl)benzaldehyde, followed by the formation of a C-O bond through a selective 5-exo-dig cyclization.
Collapse
Affiliation(s)
- Rattana Worayuthakarn
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
| | - Nattanit Suddee
- Chemical Sciences Program, Chulabhorn Graduate Institute, Laksi, Bangkok 10210, Thailand
| | - Chatphorn Theppitak
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Kittipong Chainok
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
- Chemical Sciences Program, Chulabhorn Graduate Institute, Laksi, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, Ministry of Education, Science, Research and Innovation, Bangkok 10400, Thailand
| | - Nopporn Thasana
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, Laksi, Bangkok 10210, Thailand
- Chemical Sciences Program, Chulabhorn Graduate Institute, Laksi, Bangkok 10210, Thailand
- Center of Excellence on Environmental Health and Toxicology (EHT), OPS, Ministry of Education, Science, Research and Innovation, Bangkok 10400, Thailand
| |
Collapse
|
2
|
Balasubramani A, Gunnam A, Mehta G. In Situ-Generated Ammonia Mediates Deep Restructuring of o-Bis-Ynones through a Cascade Process: One-Pot Synthesis of 2-Azafluorenones. J Org Chem 2022; 87:10138-10145. [PMID: 35818118 DOI: 10.1021/acs.joc.2c01089] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One-pot synthesis of 2-azaflorenones from readily accessed o-bis-ynones through Michael addition, orthogonal aldol reaction, dehydrative isomerization, and a 6-endo-dig-cyclization cascade, triggered by in situ-generated ammonia in the presence of a Cu(I) catalyst, has been discovered and its generality scoped. A few selected reactions of a prototypical 2-azafluorenone have been explored for functionality augmentation in its core structure. Overall, this operationally convenient 2-azafluorenone synthesis involves the formation of five new bonds (3 C-N and 2 C-C) in one pot and embodies many green and sustainable features; notably, the reagent ammonia is subsumed into the reactant o-bis-ynones with atom economy, and the only by-product is water.
Collapse
Affiliation(s)
| | - Anilkumar Gunnam
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| |
Collapse
|
3
|
Wang X, Dong J, Xu X, Tang B. Dinucleophilic Reactivity of Isocyanoacetate: Base-Catalyzed One-Pot Access to 4-Azafluorenes and 4-Azafluorenones. Org Lett 2021; 23:9063-9067. [PMID: 34730361 DOI: 10.1021/acs.orglett.1c03314] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A base-catalyzed double annulation of isocyanoacetates with various enynones has been developed for the expeditious synthesis of 4-azafluorene and 4-azafluorenone derivatives. Against the well-known 1,3-dipolar reactivities, the active methylene and isocyano groups of isocyanoacetate serve as nucleophiles in this domino transformation.
Collapse
Affiliation(s)
- Xin Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Jinhuan Dong
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Xianxiu Xu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, P. R. China
| |
Collapse
|
4
|
Wongsomboon P, Rattanajak R, Kamchonwongpaisan S, Pyne SG, Limtharakul T. Unique polyacetylenic ester-neolignan derivatives from Mitrephora tomentosa and their antimalarial activities. PHYTOCHEMISTRY 2021; 183:112615. [PMID: 33341666 DOI: 10.1016/j.phytochem.2020.112615] [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: 06/15/2020] [Revised: 12/02/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
The phytochemical investigation of the methanol extracts of the leaves and twigs of Mitrephora tomentosa Hook. f. & Thomson resulted in the isolation and identification of undescribed polyacetylenic ester-neolignan derivatives, along with six known compounds. These six undescribed natural products were named as mitrephentosins A-F. The structures of these compounds were determined by spectroscopic techniques including UV, IR, NMR, and mass spectrometric analyses. The absolute configurations of mitrephentosins A-F were determined based on specific rotations values and ECD spectral data by comparisons made with the known parent neoligan compound mitredrusin. Mitrephentosins C, E, and F showed moderate antimalarial activities (IC50 values of 13.3-24.6 μM) against the Plasmodium falciparum strains TM4/8.2 and K1CB1 and were not toxic to Vero cells, while the other isolated compounds were not active against these P. falciparum strains.
Collapse
Affiliation(s)
- Puttandon Wongsomboon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, The Graduate School and Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University, Chiang Mai, 50200, Thailand; School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia
| | - Roonglawan Rattanajak
- Medical Molecular Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand
| | - Sumalee Kamchonwongpaisan
- Medical Molecular Biotechnology Research Unit, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathumthani, 12120, Thailand
| | - Stephen G Pyne
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales, 2522, Australia.
| | - Thunwadee Limtharakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, The Graduate School and Research Center on Chemistry for Development of Health Promoting Products from Northern Resources, Chiang Mai University, Chiang Mai, 50200, Thailand.
| |
Collapse
|
5
|
Li SY, Zhang X, Teng F, Li Y, Li JH. Rh(iii)-Catalyzed [3 + 2]/[4 + 2] annulation of acetophenone oxime ethers with 3-acetoxy-1,4-enynes involving C–H activation. Org Chem Front 2021. [DOI: 10.1039/d1qo00090j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A novel, synthetically simple, selective rhodium(iii)-catalyzed [3 + 2]/[4 + 2] annulation cascade reaction to construct complex azafluorenone frameworks has been developed.
Collapse
Affiliation(s)
- Sun-Yong Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Xu Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Fan Teng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Yang Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
| |
Collapse
|
6
|
Anantachoke N, Lovacharaporn D, Reutrakul V, Michel S, Gaslonde T, Piyachaturawat P, Suksen K, Prabpai S, Nuntasaen N. Cytotoxic compounds from the leaves and stems of the endemic Thai plant Mitrephora sirikitiae. PHARMACEUTICAL BIOLOGY 2020; 58:490-497. [PMID: 32478640 PMCID: PMC7336994 DOI: 10.1080/13880209.2020.1765813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/23/2020] [Accepted: 05/03/2020] [Indexed: 05/17/2023]
Abstract
Context: Mitrephora sirikitiae Weeras., Chalermglin & R.M.K. Saunders (Annonaceae) is a plant endemic to Thailand. Its constituents and their biological activities are unknown.Objective: Isolation and identification of the compounds in the leaves and stems of M. sirikitiae and determination of their cytotoxicity.Materials and methods: Methanol extracts of the leaves and stems of M. sirikitiae were separated by chromatography, and spectroscopic methods were used to determine the structures of the components. The cytotoxicity of the extracts and pure compounds was evaluated using the sulforhodamine B assay with several cell lines. The cells were treated with the compounds at concentrations of 0.16-20 µg/mL for 48 or 72 h.Results: The investigation of the extracts of M. sirikitiae leaves and stems resulted in the isolation of a new lignan, mitrephoran, and 15 known compounds. Among these compounds, 2-(3,4-dimethoxyphenyl)-6-(3,5-dimethoxyphenyl)-3,7-dioxabicyclo[3.3.0]octane, ciliaric acid, 6-methoxymarcanine A, and stepharanine were isolated from this genus for the first time. The alkaloids liriodenine and oxoputerine exhibited strong cytotoxicity against all tested cells (IC50 values of 6.59-11.02 µM). In contrast, magnone A, 3',4-O-dimethylcedrusin, and 6-methoxymarcanine A inhibited the growth of some of the tested cells (IC50 values of 2.03-19.73 µM). Magnone A and 6-methoxymarcanine A showed low toxicity for Hek 293 cells (IC50 >20 µM).Discussion and conclusions: M. sirikitiae is a source of cytotoxic lignans and alkaloids. Among the cytotoxic compounds, magnone A and 6-methoxymarcanine A are potentially useful lead compounds for the further development of anticancer agents because of their selective inhibitory effects on cancer cell lines.
Collapse
Affiliation(s)
- Natthinee Anantachoke
- Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
- CONTACT Natthinee Anantachoke Department of Pharmacognosy, Faculty of Pharmacy, Mahidol University, Bangkok10400, Thailand
| | | | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Sylvie Michel
- Produits Naturels, Analyse et Synthèse, UMR CNRS 8038 CITCOM, Faculté de Pharmacie de Paris, Université Paris Descartes-Université de Paris, Paris, France
| | - Thomas Gaslonde
- Produits Naturels, Analyse et Synthèse, UMR CNRS 8038 CITCOM, Faculté de Pharmacie de Paris, Université Paris Descartes-Université de Paris, Paris, France
| | | | - Kanoknetr Suksen
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Samran Prabpai
- CP FOODLAB Co., Ltd, Science Park, Pathum Thani, Thailand
| | - Narong Nuntasaen
- Department of National Parks, Wildlife and Plant Conservation, Ministry of Natural Resources and Environment, The Forest Herbarium, Bangkok, Thailand
| |
Collapse
|
7
|
Anaga N, D B, Abraham B, Nisha P, Varughese S, Jayamurthy P, Somappa SB. Advanced glycation end-products (AGE) trapping agents: Design and synthesis of nature inspired indeno[2,1-c]pyridinones. Bioorg Chem 2020; 105:104375. [PMID: 33113410 DOI: 10.1016/j.bioorg.2020.104375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/02/2020] [Accepted: 10/09/2020] [Indexed: 12/24/2022]
Abstract
Advanced glycation end products (AGEs) are implicated to be the key players in most of the diabetic complications. The AGE's interfere with the proteins heterogeneously, thereby rendering denaturation and the consequent loss of function and accumulation. Thus, a novel natural product inspired indeno[2,1-c]pyridinone (4a-4ad) molecular templates with AGE's trapping potential was designed through scaffold hopping approach and synthesized via facile two-step synthetic route. Amongst the tested indeno[2,1-c]pyridinone hybrids, 4i, 4x and 4aa exhibited excellent efficiency in trapping the AGE's. The percentage of antiglycation is measured by the analytical model system, i.e. via MG trapping capacity; here the compounds 4i, 4x and 4aa with 50.03%, 69.58%, and 93.37% respectively has displayed promising efficiency. In particular, 4aa demonstrated better activity than the positive control aminoguanidine (79.82%). The in-vitro toxicity of compounds was tested on L6 rat skeletal muscle cell lines revealed that none of the compounds showed any significant toxicity at concentrations up to 1000 μM.
Collapse
Affiliation(s)
- Nair Anaga
- Agro-Processing and Technology Division, CSIR-NIIST, Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Basavaraja D
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Billu Abraham
- Agro-Processing and Technology Division, CSIR-NIIST, Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - P Nisha
- Agro-Processing and Technology Division, CSIR-NIIST, Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sunil Varughese
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695 019, Kerala, India
| | - Purushothaman Jayamurthy
- Agro-Processing and Technology Division, CSIR-NIIST, Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Sasidhar B Somappa
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695 019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| |
Collapse
|
8
|
Angello NH, Wiley RE, Abelt CJ, Scheerer JR. Synthesis and Spectrophotometric Analysis of 1-Azafluorenone Derivatives. Molecules 2020; 25:molecules25153358. [PMID: 32722081 PMCID: PMC7436005 DOI: 10.3390/molecules25153358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/20/2020] [Accepted: 07/21/2020] [Indexed: 11/16/2022] Open
Abstract
A new extension for the 'one pot' construction of diverse 1-azafluorene derivatives featuring a Diels-Alder/retro-Diels-Alder cycloaddition is reported. Conditions were also determined for oxidation to the derived azafluorenones. The spectrophotometric analysis of five different azafluorenones were performed. Moderate fluorescence was observed with azafluorenone derivatives that bear an imbedded pyridone motif; whereas those bearing substituted pyridines do not fluoresce.
Collapse
|
9
|
Gomes CRB, de Souza MVN, Facchinetti V. A Review on Onychine and its Analogs: Synthesis and Biological Activity. Curr Org Synth 2020; 17:3-22. [PMID: 32103713 DOI: 10.2174/1570179417666191218112842] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/07/2019] [Accepted: 12/18/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Onychine is a 4-azafluorenone alkaloid isolated from the Annonaceae family, in low concentrations. Onychine and its analogs exhibit a wide range of pharmacological activities such as antifungal, antibacterial, anticancer, and antimalarial. Because of the high bioactivity of some 4-azafluorenone derivatives, several synthetic methods have been developed for their procurement. OBJECTIVE Considering the importance of these alkaloids, we aim to present the main synthetic approaches to onychines and its derivatives and the biological activity of some 4-azafluorenones. METHODS The most prominent methodologies for the synthesis of onychines were reviewed. RESULTS In this work, we cover many synthetic approaches for the synthesis of onychine and 4-azafluorenone derivatives including intramolecular cyclizations, multicomponent reactions, microwave-assisted multicomponent reactions, Diels-alder reactions, among others. Moreover, we also review the biological activity of 4-azafluorenones. CONCLUSION 4-azafluorenones have risen as prominent structures in medicinal chemistry; however, most of the time, access to new derivatives involves toxic catalysts, harsh reaction conditions, and long-step procedures. Therefore, the development of new synthetic routes with more operational simplicity, simple purification procedure, good yields, and low environmental impact, is desirable.
Collapse
Affiliation(s)
- Claudia R B Gomes
- Fundacao Oswaldo Cruz, Instituto de Tecnologia em Farmacos - Farmanguinhos. Rua Sizenando Nabuco 100, Manguinhos, 21041- 250, RJ, Brazil
| | - Marcus V N de Souza
- Fundacao Oswaldo Cruz, Instituto de Tecnologia em Farmacos - Farmanguinhos. Rua Sizenando Nabuco 100, Manguinhos, 21041- 250, RJ, Brazil
| | - Victor Facchinetti
- Fundacao Oswaldo Cruz, Instituto de Tecnologia em Farmacos - Farmanguinhos. Rua Sizenando Nabuco 100, Manguinhos, 21041- 250, RJ, Brazil
| |
Collapse
|
10
|
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.
Collapse
Affiliation(s)
- Pradip Debnath
- Department of Chemistry, Maharaja Bir Bikram College, Agartala, Tripura-799004, India
| |
Collapse
|
11
|
Kumbar M, Patil SA, Kinnal SM, Jawoor SS, Shettar A. Scorpionate ligand derived from 1-amino-9H-fluoren-9-ol and its metal (II) complexes as potential anticancer agents. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.cdc.2019.100226] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
12
|
Preparation of a dual-functionalized fumed silica nanoparticle catalysis for synthesis of azaluorenone derivatives. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03740-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
13
|
Rodríguez JF, Burton KI, Franzoni I, Petrone DA, Scheipers I, Lautens M. Palladium-Catalyzed Hydride Addition/C-H Bond Activation Cascade: Cycloisomerization of 1,6-Diynes. Org Lett 2018; 20:6915-6919. [PMID: 30338688 DOI: 10.1021/acs.orglett.8b03057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The use of ammonium halide salts as metal hydride precursors in a new Pd-catalyzed cycloisomerization of 1,6-diynes, which affords unexplored silylated 2-azafluorenes, is reported. This cascade process includes the addition of a Pd-hydride species to a π-system, intramolecular carbopalladation, and C(sp2)-H bond activation. A variety of functional groups are tolerated, and the synthetic utility of the resulting products has been demonstrated by a series of derivatizations.
Collapse
Affiliation(s)
- José F Rodríguez
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Katherine I Burton
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Ivan Franzoni
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - David A Petrone
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Ina Scheipers
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Mark Lautens
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| |
Collapse
|
14
|
Ye F, Tran C, Jullien L, Le Saux T, Haddad M, Michelet V, Ratovelomanana-Vidal V. Synthesis of Fluorescent Azafluorenones and Derivatives via a Ruthenium-Catalyzed [2 + 2 + 2] Cycloaddition. Org Lett 2018; 20:4950-4953. [PMID: 30070483 DOI: 10.1021/acs.orglett.8b02085] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An original and mild synthetic route for the preparation of novel azafluorenones and derivatives via a ruthenium-mediated [2 + 2 + 2] cycloaddition of α,ω-diynes and cyanamides has been developed. This atom-economical catalytic process demonstrated remarkable regioselectivities to access fluorescent azafluorenone derivatives. The photophysical properties of azafluorenone derivatives have been evaluated, and photoluminescence phenomena at solid and liquid states have been highlighted.
Collapse
Affiliation(s)
- Fei Ye
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris , Paris 75005 , France
| | - Christine Tran
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris , Paris 75005 , France
| | - Ludovic Jullien
- PASTEUR, Chemistry Department , École Normale Supérieure, PSL University, Sorbonne University, CNRS , Paris 75005 , France
| | - Thomas Le Saux
- PASTEUR, Chemistry Department , École Normale Supérieure, PSL University, Sorbonne University, CNRS , Paris 75005 , France
| | - Mansour Haddad
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris , Paris 75005 , France
| | - Véronique Michelet
- PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris , Paris 75005 , France
| | | |
Collapse
|
15
|
Panidthananon W, Chaowasku T, Sritularak B, Likhitwitayawuid K. A New Benzophenone C-Glucoside and Other Constituents of Pseuduvaria fragrans and Their α-Glucosidase Inhibitory Activity. Molecules 2018; 23:E1600. [PMID: 30004411 PMCID: PMC6099400 DOI: 10.3390/molecules23071600] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 06/27/2018] [Accepted: 06/28/2018] [Indexed: 01/20/2023] Open
Abstract
Phytochemical investigations of the leaves and stems of Pseuduvaria fragrans led to the isolation of a new benzophenone C-glucoside named pseuduvarioside (1), together with six known compounds including (-)-guaiol (2), (+)-isocorydine (3), cyathocaline (4), isoursoline (5), N-trans-coumaroyltyramine (6), and N-trans-feruloyltyramine (7). Their structures were characterized by NMR spectroscopy and mass spectrometry. All of the isolates were evaluated for inhibitory activity against the enzyme α-glucosidase. N-trans-coumaroyltyramine and N-trans-feruloyltyramine showed higher activity than the drug acarbose. Kinetic studies revealed that both tyramine-derived amides were uncompetitive inhibitors of the enzyme.
Collapse
Affiliation(s)
- Wongvarit Panidthananon
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Tanawat Chaowasku
- Department of Biology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Rd., Chiang Mai 50200, Thailand.
- Center of Excellence in Bioresources for Agriculture, Industry, and Medicine, Chiang Mai University, Chiang Mai 50200, Thailand.
| | - Boonchoo Sritularak
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Kittisak Likhitwitayawuid
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.
| |
Collapse
|
16
|
Pan WH, Xu XY, Shi N, Tsang SW, Zhang HJ. Antimalarial Activity of Plant Metabolites. Int J Mol Sci 2018; 19:ijms19051382. [PMID: 29734792 PMCID: PMC5983777 DOI: 10.3390/ijms19051382] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 04/30/2018] [Accepted: 05/02/2018] [Indexed: 12/21/2022] Open
Abstract
Malaria, as a major global health problem, continues to affect a large number of people each year, especially those in developing countries. Effective drug discovery is still one of the main efforts to control malaria. As natural products are still considered as a key source for discovery and development of therapeutic agents, we have evaluated more than 2000 plant extracts against Plasmodium falciparum. As a result, we discovered dozens of plant leads that displayed antimalarial activity. Our phytochemical study of some of these plant extracts led to the identification of several potent antimalarial compounds. The prior comprehensive review article entitled “Antimalarial activity of plant metabolites” by Schwikkard and Van Heerden (2002) reported structures of plant-derived compounds with antiplasmodial activity and covered literature up to the year 2000. As a continuation of this effort, the present review covers the antimalarial compounds isolated from plants, including marine plants, reported in the literature from 2001 to the end of 2017. During the span of the last 17 years, 175 antiplasmodial compounds were discovered from plants. These active compounds are organized in our review article according to their plant families. In addition, we also include ethnobotanical information of the antimalarial plants discussed.
Collapse
Affiliation(s)
- Wen-Hui Pan
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong SAR, China.
| | - Xin-Ya Xu
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong SAR, China.
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou 510070, China.
| | - Ni Shi
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong SAR, China.
| | - Siu Wai Tsang
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong SAR, China.
| | - Hong-Jie Zhang
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong SAR, China.
| |
Collapse
|
17
|
Sudhan PN, Ghashang M, Mansoor SS. Tribromo melamine-catalyzed one-pot synthesis of a series of 4-aryl-4,5-dihydro-1H-indeno[1,2-b]pyridine derivatives. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2015.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Prasanna Nithiya Sudhan
- Bioactive Organic Molecule Synthetic Unit, Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam, Tamil Nadu, 632 509, India
| | - Majid Ghashang
- Faculty of Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Esfahan, Iran
| | - Syed Sheik Mansoor
- Bioactive Organic Molecule Synthetic Unit, Research Department of Chemistry, C. Abdul Hakeem College (Autonomous), Melvisharam, Tamil Nadu, 632 509, India
| |
Collapse
|
18
|
Identification of a new class of WNT1 inhibitor: Cancer cells migration, G-quadruplex stabilization and target validation. Oncotarget 2018; 7:67986-68001. [PMID: 27626678 PMCID: PMC5356533 DOI: 10.18632/oncotarget.6622] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 11/16/2015] [Indexed: 12/31/2022] Open
Abstract
Developing the Wnt pathway inhibitors has been considered as a therapeutic approach for cancers and other Wnt-related diseases. Previously we found that the G-rich sequence of WNT1 promoter is capable of forming G-quadruplex structure and stabilizing agents for Wnt1-mediated signaling pathway. Using a established cell-based drug screen system that enabled the evaluation of WNT1 expression activity in a G-quadruplex structure dependent manner, we evaluated a series of 6-substituted 9-chloro-11H-indeno[1,2-c]quinolin-11-one derivatives that potentially inhibit the Wnt1-mediated signaling pathway. The most potent compound SJ26 showed repression of WNT1 activity in a G-quadruplex structure-dependent manner. Moreover, compound SJ26 inhibited the WNT1-mediated downstream signaling pathway and suppressed migration activity of cancer cells. Thus, we have identified a tetracyclic azafluorenone, SJ26, that is capable of binding to G-quadruplex DNA structure, repressing WNT1 expression, and inhibiting cell migration.
Collapse
|
19
|
Laha JK, Patel KV, Saima S, Pandey S, Solanke G, Vashisht V. Scope of regioselective Suzuki reactions in the synthesis of arylpyridines and benzylpyridines and subsequent intramolecular cyclizations to azafluorenes and azafluorenones. NEW J CHEM 2018. [DOI: 10.1039/c8nj02734j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The current investigation on regioselective Suzuki reaction of 2,3-dihalopyridines and 2-halo-3-halomethyl pyridines has been studied and extended for azafluorenes and azafluorenones synthesis.
Collapse
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| | - Ketul V. Patel
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| | - Saima Saima
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| | - Surabhi Pandey
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| | - Ganesh Solanke
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| | - Vanya Vashisht
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- India
| |
Collapse
|
20
|
Sudhan PN, Ghashang M, Mansoor SS. Phthalimide- N -sulfonic acid as a recyclable organocatalyst for an efficient and eco-friendly synthesis of 2-(2-oxo-2 H -chromen-3-yl)-4-aryl-indeno[1,2- b ]pyridine-5-one derivatives. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2015.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Bayat M, Hosseini FS, Notash B. Stereoselective synthesis of indenone-fused heterocyclic compounds via a one-pot four-component reaction. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
22
|
Hirai S, Horikawa Y, Asahara H, Nishiwaki N. Tailor-made synthesis of fully alkylated/arylated nicotinates by FeCl3-mediated condensation of enamino esters with enones. Chem Commun (Camb) 2017; 53:2390-2393. [DOI: 10.1039/c7cc00051k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A synthetic method for fully alkylated/arylated nicotinates was achieved by FeCl3-mediated condensation of enamino esters and enones.
Collapse
Affiliation(s)
- Sho Hirai
- School of Environmental Science and Engineering
- Kochi University of Technology
- Kami
- Japan
| | - Yurie Horikawa
- School of Environmental Science and Engineering
- Kochi University of Technology
- Kami
- Japan
| | - Haruyasu Asahara
- School of Environmental Science and Engineering
- Kochi University of Technology
- Kami
- Japan
- Research Center for Material Science and Engineering
| | - Nagatoshi Nishiwaki
- School of Environmental Science and Engineering
- Kochi University of Technology
- Kami
- Japan
- Research Center for Material Science and Engineering
| |
Collapse
|
23
|
Laha JK, Patel KV, Dubey G, Jethava KP. Intramolecular Minisci acylation under silver-free neutral conditions for the synthesis of azafluorenones and fluorenones. Org Biomol Chem 2017; 15:2199-2210. [DOI: 10.1039/c7ob00077d] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An intramolecular Minisci acylation under silver-free neutral conditions providing access to azafluorenones and fluorenones has been developed.
Collapse
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Ketul V. Patel
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Gurudutt Dubey
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| |
Collapse
|
24
|
Sadiq A, Ahmad S, Ali R, Ahmad F, Ahmad S, Zeb A, Ayaz M, Ullah F, Siddique AN. Antibacterial and antifungal potentials of the solvents extracts from Eryngium caeruleum, Notholirion thomsonianum and Allium consanguineum. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2016; 16:478. [PMID: 27881119 PMCID: PMC5122145 DOI: 10.1186/s12906-016-1465-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 11/17/2016] [Indexed: 01/19/2023]
Abstract
BACKGROUND Herbal medicines have long been used for various ailments in various societies and natural bioactive compounds are gaining more and more importance due to various factors. In this context, three plant species i.e., Eryngium caeruleum, Notholirion thomsonianum and Allium consanguineum have been aimed for the scientific verification of their purported traditional uses against various infectious diseases. METHODS In this study, three plants were assayed for antibacterial and antifungal potentials. The antibacterial investigations were performed via well diffusion method and nutrient broth dilution method. The bacterial strains used in the study were Enterococcus faecalis, Proteus mirabilis, Escherichia coli, Salmonella typhi, Klebsiella pneumonia and Pseudomonas aeruginosa. The antifungal potential was investigated by dilution method of Muller-Hinton agar media of the plants' samples. The fungal strains used were Aspergillis fumigatus, Aspergillis flavus and Aspergillis niger. Ceftriaxone and nystatin were used as standard drugs in antibacterial and antifungal assays respectively. RESULTS Different fractions from N. thomsonianum were tested against five bacterial strains while the samples from A. consanguineum and E. caeruleum were tested against six bacterial strains. All the samples exhibited prominent antibacterial activity against the tested strains. Overall, chloroform and ethyl acetate fractions were found most potent among the three plants' samples. N. thomsonianum excelled among the three plants in antibacterial activity. Similarly, in antifungal assay, N. thomsonianum exhibited strong antifungal activity against the fungal strains. The chloroform fraction displayed MFCs of 175.67 ± 5.20***, 29.33 ± 5.48*** and 63.00 ± 4.93*** μg/ml against Aspergillus fumigatus, Aspergillus flavus and Aspergillus niger respectively. The whole study demonstrates that all the three plant species were active against tested bacterial and fungal strains. CONCLUSION It can be concluded from our findings that N. thomsonianum, A. consanguineum and E. caeruleum have broad antibacterial and antifungal potentials. In all of the plants' samples, chloroform and ethyl acetate fractions were more active. Furthermore, being the potent samples, the chloroform and ethyl acetate fractions of these plants can be subjected to column chromatography for the isolation of more effective antimicrobial drugs.
Collapse
Affiliation(s)
- Abdul Sadiq
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Sadiq Ahmad
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Rahmat Ali
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Fawad Ahmad
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Sajjad Ahmad
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Anwar Zeb
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Muhammad Ayaz
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Farhat Ullah
- Department of Pharmacy, University of Malakand, Chakdara, 18000 Dir (L), KPK Pakistan
| | - Abu Nasar Siddique
- Department of Biotechnology, Bacha Khan University, Charsadda, 24420 KPK Pakistan
| |
Collapse
|
25
|
Ye F, Haddad M, Michelet V, Ratovelomanana-Vidal V. Access toward Fluorenone Derivatives through Solvent-Free Ruthenium Trichloride Mediated [2 + 2 + 2] Cycloadditions. Org Lett 2016; 18:5612-5615. [DOI: 10.1021/acs.orglett.6b02840] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Fei Ye
- PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie
Paris, Paris 75005, France
| | - Mansour Haddad
- PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie
Paris, Paris 75005, France
| | - Véronique Michelet
- PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie
Paris, Paris 75005, France
| | | |
Collapse
|
26
|
Marquise N, Chevallier F, Nassar E, Frédérich M, Ledoux A, Halauko YS, Ivashkevich OA, Matulis VE, Roisnel T, Dorcet V, Mongin F. Substituted azafluorenones: access from dihalogeno diaryl ketones by palladium-catalyzed auto-tandem processes and evaluation of their antibacterial, antifungal, antimalarial and antiproliferative activities. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
27
|
Fathimath Salfeena CT, Ashitha KT, Sasidhar BS. BF3·Et2O mediated one-step synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines. Org Biomol Chem 2016; 14:10165-10169. [DOI: 10.1039/c6ob02133f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and efficient one-pot ring annulation provides quick access to N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines.
Collapse
Affiliation(s)
- C. T. Fathimath Salfeena
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- Chemical Sciences and Technology Division
| | - K. T. Ashitha
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- Chemical Sciences and Technology Division
| | - B. S. Sasidhar
- Academy of Scientific and Innovative Research (AcSIR)
- New Delhi 110001
- India
- Organic Chemistry Section
- Chemical Sciences and Technology Division
| |
Collapse
|
28
|
Laha JK, Jethava KP, Patel S. Scope of Successive C–H Functionalizations of the Methyl Group in 3-Picolines: Intramolecular Carbonylation of Arenes to the Metal-Free Synthesis of 4-Azafluorenones. Org Lett 2015; 17:5890-3. [DOI: 10.1021/acs.orglett.5b03071] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Krupal P. Jethava
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Sagarkumar Patel
- Department of Pharmaceutical
Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| |
Collapse
|
29
|
Yang C, Xu ZL, Shao H, Mou XQ, Wang J, Wang SH. A Tin(IV) Chloride Promoted Tandem C-O Bond Cleavage/Nazarov Cyclization/Nucleophilic Addition Reaction of 1,1-Disubstituted Allylic Ethers toward the Synthesis of Multisubstituted Indenes. Org Lett 2015; 17:5288-91. [PMID: 26465205 DOI: 10.1021/acs.orglett.5b02610] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel SnCl4-promoted tandem reaction toward multisubstituted indenes via a sequential C-O bond cleavage/Nazarov cyclization/nucleophilic addition reaction has been developed to afford a series of multisubstituted indenes with an all-carbon quaternary center in moderate to good yields.
Collapse
Affiliation(s)
- Chao Yang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Zheng-Liang Xu
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Hui Shao
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Xue-Qing Mou
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Jie Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China
| | - Shao-Hua Wang
- School of Pharmacy & State Key Laboratory of Applied Organic Chemistry, Lanzhou University , Lanzhou 730000, P. R. China.,Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, Sichuan University , Chengdu, P. R. China
| |
Collapse
|
30
|
Patravale AA, Gore AH, Patil DR, Kolekar GB, Deshmukh MB, Choudhari PB, Bhatia MS, Anbhule PV. Contemporary development in sequential Knoevenagel, Michael addition multicomponent reaction for the synthesis of 4-Aryl-5-oxo-5H-indeno[1,2-b]pyridine-3-carbonitrile. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2187-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
31
|
Lúcio ASSC, Almeida JRGDS, da-Cunha EVL, Tavares JF, Barbosa Filho JM. Alkaloids of the Annonaceae: Occurrence and a Compilation of Their Biological Activities. THE ALKALOIDS: CHEMISTRY AND BIOLOGY 2015; 74:233-409. [DOI: 10.1016/bs.alkal.2014.09.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
32
|
Chen KQ, Zhang HM, Wang DL, Sun DQ, Ye S. Enantioselective N-heterocyclic carbene-catalyzed synthesis of indenopyrones. Org Biomol Chem 2015; 13:6694-7. [DOI: 10.1039/c5ob00859j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral disubstituted indenopyrones were synthesized in high yields with exclusive cis-selectivity and excellent enantioselectivity via N-heterocyclic carbene catalysis.
Collapse
Affiliation(s)
- Kun-Quan Chen
- Marine College
- Shangdong University at Weihai
- Weihai 264209
- China
- Beijing National Laboratory for Molecular Sciences
| | - Han-Ming Zhang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Dong-Ling Wang
- Marine College
- Shangdong University at Weihai
- Weihai 264209
- China
- Beijing National Laboratory for Molecular Sciences
| | - De-Qun Sun
- Marine College
- Shangdong University at Weihai
- Weihai 264209
- China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| |
Collapse
|
33
|
Ghashang M, Mansoor SS, Logaiya K, Aswin K. An appropriate one-pot synthesis of 4-aryl-2-naphthalen-2-yl-5H-indeno [1,2-b]pyridin-5-ones using thiourea dioxide as an efficient and reusable organocatalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2014. [DOI: 10.1007/s11164-014-1742-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
34
|
Kamaraj C, Rahuman AA, Roopan SM, Bagavan A, Elango G, Zahir AA, Rajakumar G, Jayaseelan C, Santhoshkumar T, Marimuthu S, Kirthi AV. Bioassay-guided isolation and characterization of active antiplasmodial compounds from Murraya koenigii extracts against Plasmodium falciparum and Plasmodium berghei. Parasitol Res 2014; 113:1657-72. [PMID: 24638906 DOI: 10.1007/s00436-014-3810-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 02/02/2014] [Indexed: 12/21/2022]
Abstract
Malaria is an overwhelming impact in the poorest countries in the world due to their prevalence, virulence and drug resistance ability. Currently, there is inadequate armoury of drugs for the treatment of malaria. This underscores the continuing need for the discovery and development of new effective and safe antimalarial drugs. To evaluate the in vitro and in vivo antimalarial activity of the leaf ethyl acetate extract of Murraya koenigii, bioassay-guided chromatographic fractionation was employed for the isolation and purification of antimalarial compounds. The in vitro antimalarial activity was assayed by the erythrocytic stages of chloroquine-sensitive strain of Plasmodium falciparum (3D7) in culture using the fluorescence-based SYBR Green I assay. The in vivo assay was done by administering mice infected with Plasmodium berghei (NK65) four consecutive daily doses of the extracts through oral route following Peter's 4-day curative standard test. The percentage suppression of parasitaemia was calculated for each dose level by comparing the parasitaemia in untreated control with those of treated mice. Cytotoxicity was determined against HeLa cells using MTT assay. Histopathology was studied in kidney, liver and spleen of isolated compound-treated Swiss albino mice. The leaf crude ethyl acetate extract of M. koenigii showed good in vitro antiplasmodial activity against P. falciparum. The in vivo test of the leaf crude ethyl acetate extract (600 mg/kg) showed reduced malaria parasitaemia by 86.6% against P. berghei in mice. Bioassay-guided fractionation of the leaf ethyl acetate extract of M. koenigii led to the isolation of two purified fractions C3B2 (2.84 g) and C3B4 (1.97 g). The purified fractions C3B2 and C3B4 were found to be active with IC50 values of 10.5 ± 0.8 and 8.25 ± 0.2 μg/mL against P. falciparum, and in vivo activity significantly reduced parasitaemia by 82.6 and 88.2% at 100 mg/kg/body weight on day 4 against P. berghei, respectively. The isolated fractions C3B2 and C3B4 were monitored by thin-layer chromatography until a single spot was obtained with R f values of 0.36 and 0.52, respectively. The pure compounds obtained in the present investigation were subjected to UV-visible spectroscopy, Fourier transformer infrared spectroscopy, 1D and 2D (1)H-Nuclear magnetic resonance (NMR), (13)C NMR, DEPT, COSY and Mass spectral analysis. Based on the spectral analysis, it is concluded that the isolated compounds were myristic acid (C3B2) and β-caryophyllene (C3B4). The cytotoxic effect of myristic acid and β-caryophyllene showed the TC50 values of >100 and 80.5 μg/mL, respectively against HeLa cell line. The histopathology study showed that protection against nephrotoxicity of kidney, hepatic damage of liver and splenocytes protection in spleen was achieved with the highest dose tested at 100 mg/kg/body weight. The present study provides evidence of antiplasmodial compounds from M. koenigii and is reported for the first time.
Collapse
Affiliation(s)
- Chinnaperumal Kamaraj
- Unit of Nanotechnology and Bioactive Natural Products, Post Graduate and Research Department of Zoology, C. Abdul Hakeem College, Melvisharam, 632 509, Vellore District, Tamil Nadu, India
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Marquise N, Dorcet V, Chevallier F, Mongin F. Synthesis of substituted azafluorenones from dihalogeno diaryl ketones by palladium-catalyzed auto-tandem processes. Org Biomol Chem 2014; 12:8138-41. [DOI: 10.1039/c4ob01629g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Auto-tandem processes combining either Suzuki or Heck coupling with direct cyclizing arylation are described.
Collapse
Affiliation(s)
- Nada Marquise
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1 – CNRS
- 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Centre de DIFfractométrie X
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1 – CNRS
- 35042 Rennes Cedex, France
| | - Floris Chevallier
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1 – CNRS
- 35042 Rennes Cedex, France
| | - Florence Mongin
- Chimie et Photonique Moléculaires
- Institut des Sciences Chimiques de Rennes
- UMR 6226
- Université de Rennes 1 – CNRS
- 35042 Rennes Cedex, France
| |
Collapse
|
36
|
Synthesis of azafluorenones and related compounds using deprotocupration–aroylation followed by intramolecular direct arylation. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.030] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
37
|
Choomuenwai V, Schwartz BD, Beattie KD, Andrews KT, Khokhar S, Davis RA. The discovery, synthesis and antimalarial evaluation of natural product-based polyamine alkaloids. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
38
|
|
39
|
Rayanil KO, Limpanawisut S, Tuntiwachwuttikul P. Ent-pimarane and ent-trachylobane diterpenoids from Mitrephora alba and their cytotoxicity against three human cancer cell lines. PHYTOCHEMISTRY 2013; 89:125-130. [PMID: 23465717 DOI: 10.1016/j.phytochem.2013.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 01/15/2013] [Accepted: 01/29/2013] [Indexed: 06/01/2023]
Abstract
Bioassay-guided fractionation of the hexane extract of the branches of Mitrephora alba led to the isolation of five diterpenoids: ent-8β-hydroxypimar-15-en-18-oic acid, ent-15,16-dihydroxypimar-8(14)-en-18-oic acid, ent-3β-hydroxytrachyloban-18-oic acid, ent-3β-hydroxytrachyloban-18-al and methyl ent-3β-hydroxytrachyloban-18-oate, together with five related known diterpenoids. The structures were elucidated by spectroscopic analysis and comparison with literature data. All isolated compounds were evaluated for their cytotoxic activities against three human cancer cell lines. The results showed that three ent-trachylobane diterpenes had moderate cytotoxicity against NCI-H187 cancer cells.
Collapse
Affiliation(s)
- Kanok-on Rayanil
- Department of Chemistry, Faculty of Science, Silpakorn University, Nakorn Pathom 73000, Thailand.
| | | | | |
Collapse
|
40
|
Camp D, Campitelli M, Carroll AR, Davis RA, Quinn RJ. Front-Loading Natural-Product-Screening Libraries for logP:Background, Development, and Implementation. Chem Biodivers 2013; 10:524-37. [DOI: 10.1002/cbdv.201200302] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Indexed: 01/22/2023]
|
41
|
Levrier C, Balastrier M, Beattie KD, Carroll AR, Martin F, Choomuenwai V, Davis RA. Pyridocoumarin, aristolactam and aporphine alkaloids from the Australian rainforest plant Goniothalamus australis. PHYTOCHEMISTRY 2013; 86:121-6. [PMID: 23158725 DOI: 10.1016/j.phytochem.2012.09.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 09/28/2012] [Accepted: 09/28/2012] [Indexed: 05/15/2023]
Abstract
Chemical investigation of the CH(2)Cl(2)/CH(3)OH extracts from aerial parts of the Australian plant Goniothalamus australis has resulted in the isolation of two pyridocoumarin alkaloids, goniothalines A (1) and B (2) as well as eight known natural products, aristolactam AII (3), enterocarpam II (4), caldensine (5), sauristolactam (6), (-)-anonaine (7), asimilobine (8), altholactone (9) and (+)-goniofufurone (10). The chemical structures of all compounds were determined by extensive spectroscopic and spectrometric analysis. Methylation of 2 using TMS-diazomethane afforded 1, which unequivocally established that both 1 and 2 possessed a 10-methyl-2H-pyrano[2,3-f]quinolin-2-one skeleton. These pyridocoumarin alkaloids are putatively proposed to arise biosynthetically from an aporphinoid precursor. Compounds 1-10 were evaluated for in vitro antimalarial activity against a chloroquine-sensitive Plasmodium falciparum line (3D7). Sauristolactam (6) and (-)-anonaine (7) exhibited the most potent antiparasitic activity with IC(50) values of 9 and 7 μM, respectively.
Collapse
Affiliation(s)
- Claire Levrier
- Eskitis Institute, Griffith University, Brisbane, Qld 4111, Australia
| | | | | | | | | | | | | |
Collapse
|
42
|
Li Y, Fan W, Xu HW, Jiang B, Wang SL, Tu SJ. A novel three-component [5 + 1] heterocyclization leading to 2-azafluorenone synthesis and its polyfunctionalizations. Org Biomol Chem 2013; 11:2417-20. [DOI: 10.1039/c3ob40371h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Mamane V, Chamas Z, Aubert E, Fort Y. Ag2O mediated N-demethylation and oxidative opening of indenopyrido[2,1-a]isoindolones. Efficient access to polysubstituted 1-azafluorenones. RSC Adv 2013. [DOI: 10.1039/c3ra43278e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
44
|
|
45
|
Choomuenwai V, Andrews KT, Davis RA. Synthesis and antimalarial evaluation of a screening library based on a tetrahydroanthraquinone natural product scaffold. Bioorg Med Chem 2012; 20:7167-74. [DOI: 10.1016/j.bmc.2012.09.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/18/2012] [Accepted: 09/25/2012] [Indexed: 10/27/2022]
|
46
|
Abstract
Natural products (NPs) have historically been a fertile source of new drugs for the pharmaceutical industry. However, this once-popular approach has waned considerably over the past two decades as the high-throughput screening of megalibraries comprised mainly of molecules with non-natural (synthetic) motifs has unfolded. Contemporary high-throughput screening libraries contain molecules compliant with physicochemical profiles considered essential for downstream development. Until recently, there was no strategy that aligned NP screening with the same physicochemical profiles. An approach based on Log P has addressed these concerns and, together with advances in isolation, afforded NP leads in timelines compatible with pure compound screening. Concomitant progress related to access of biological resources has provided long-awaited legal certainty to further facilitate NP drug discovery.
Collapse
|
47
|
Camp D, Davis RA, Campitelli M, Ebdon J, Quinn RJ. Drug-like properties: guiding principles for the design of natural product libraries. JOURNAL OF NATURAL PRODUCTS 2012; 75:72-81. [PMID: 22204643 DOI: 10.1021/np200687v] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
While natural products or their derivatives and mimics have contributed around 50% of current drugs, there has been no approach allowing front-loading of chemical space compliant with lead- and drug-like properties. The importance of physicochemical properties of molecules in the development of orally bioavailable drugs has been recognized. Classical natural product drug discovery has only been able to undertake this analysis retrospectively after compounds are isolated and structures elucidated. The present approach addresses front-loading of both extracts and subsequent fractions with desired physicochemical properties prior to screening for drug discovery. The physicochemical profiles of natural products active against two neglected disease targets, malaria and African trypanosomiasis, are presented based on this strategy. This approach can ensure timely development of natural product leads at a hitherto unachievable rate.
Collapse
Affiliation(s)
- David Camp
- Eskitis Institute, Griffith University, Brisbane, QLD 4111, Australia
| | | | | | | | | |
Collapse
|
48
|
Abstract
Malaria is a human infectious disease that is caused by four species of Plasmodium. It is responsible for more than 1 million deaths per year. Natural products contain a great variety of chemical structures and have been screened for antiplasmodial activity as potential sources of new antimalarial drugs. This review highlights studies on natural products with antimalarial and antiplasmodial activity reported in the literature from January 2009 to November 2010. A total of 360 antiplasmodial natural products comprised of terpenes, including iridoids, sesquiterpenes, diterpenes, terpenoid benzoquinones, steroids, quassinoids, limonoids, curcubitacins, and lanostanes; flavonoids; alkaloids; peptides; phenylalkanoids; xanthones; naphthopyrones; polyketides, including halenaquinones, peroxides, polyacetylenes, and resorcylic acids; depsidones; benzophenones; macrolides; and miscellaneous compounds, including halogenated compounds and chromenes are listed in this review.
Collapse
Affiliation(s)
| | - Lucia M. X. Lopes
- Author to whom correspondence should be addressed; ; Tel.: +55-16-33019663; Fax: +55-16-33019692
| |
Collapse
|
49
|
Kraus GA, Kempema A. Synthesis of azafluorenone antimicrobial agents. JOURNAL OF NATURAL PRODUCTS 2010; 73:1967-1968. [PMID: 20964320 DOI: 10.1021/np100536a] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A flexible synthesis of the azafluorenone alkaloids 1, 2, 3, and 4 is described.
Collapse
Affiliation(s)
- George A Kraus
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, United States.
| | | |
Collapse
|
50
|
Xu M, Andrews KT, Birrell GW, Tran TL, Camp D, Davis RA, Quinn RJ. Psammaplysin H, a new antimalarial bromotyrosine alkaloid from a marine sponge of the genus Pseudoceratina. Bioorg Med Chem Lett 2010; 21:846-8. [PMID: 21190857 DOI: 10.1016/j.bmcl.2010.11.081] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 11/15/2010] [Accepted: 11/17/2010] [Indexed: 11/15/2022]
Abstract
Mass-directed isolation of the CH(2)Cl(2)/CH(3)OH extract from a marine sponge of the genus Pseudoceratina resulted in the purification of a new antimalarial bromotyrosine alkaloid, psammaplysin H (1), along with the previously isolated analogs psammaplysins G (2) and F (3). The structure of 1 was elucidated following 1D and 2D NMR, and MS data analysis. All compounds were tested in vitro against the 3D7 line of Plasmodium falciparum and mammalian cell lines (HEK293 and HepG2), with 1 having the most potent (IC(50) 0.41μM) and selective (>97-fold) antimalarial activity.
Collapse
Affiliation(s)
- Min Xu
- Eskitis Institute, Griffith University, Brisbane, QLD 4111, Australia
| | | | | | | | | | | | | |
Collapse
|