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Purbaya S, Harneti D, Safriansyah W, Rahmawati, Wulandari AP, Mulyani Y, Supratman U. Secondary Metabolites of Biscogniauxia: Distribution, Chemical Diversity, Bioactivity, and Implications of the Occurrence. Toxins (Basel) 2023; 15:686. [PMID: 38133190 PMCID: PMC10747060 DOI: 10.3390/toxins15120686] [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: 09/30/2023] [Revised: 10/19/2023] [Accepted: 10/19/2023] [Indexed: 12/23/2023] Open
Abstract
The genus Biscogniauxia, a member of the family Xylariaceae, is distributed worldwide with more than 50 recognized taxa. Biscogniauxia species is known as a plant pathogen, typically acting as a parasite on tree bark, although certain members of this genus also function as endophytic microorganisms. Biscogniauxia endophytic strain has received attention in many cases, which includes constituent research leading to the discovery of various bioactive secondary metabolites. Currently, there are a total of 115 chemical compounds belonging to the class of secondary metabolites, and among these compounds, fatty acids have been identified. In addition, the strong pharmacological agents of this genus are (3aS,4aR,8aS,9aR)-3a-hydroxy-8a-methyl-3,5-dimethylenedecahydronaphto [2,3-b]furan-2(3H)-one (HDFO) (antifungal), biscopyran (phytotoxic activity), reticulol (antioxidant), biscogniazaphilone A and B (antimycobacterial), and biscogniauxone (Enzyme GSK3 inhibitor). This comprehensive research contributes significantly to the potential discovery of novel drugs produced by Biscogniauxia and holds promise for future development. Importantly, it represents the first-ever review of natural products originating from the Biscogniauxia genus.
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Affiliation(s)
- Sari Purbaya
- Department of Chemistry, Faculty of Science and Informatics, Universitas Jenderal Achmad Yani, Cimahi 40531, Indonesia;
- Departments of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia; (D.H.); (W.S.); (Y.M.)
| | - Desi Harneti
- Departments of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia; (D.H.); (W.S.); (Y.M.)
| | - Wahyu Safriansyah
- Departments of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia; (D.H.); (W.S.); (Y.M.)
| | - Rahmawati
- Central Laboratory, Universitas Padjadjaran, Jatinangor 45363, Indonesia;
| | - Asri Peni Wulandari
- Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia;
| | - Yeni Mulyani
- Departments of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia; (D.H.); (W.S.); (Y.M.)
| | - Unang Supratman
- Departments of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia; (D.H.); (W.S.); (Y.M.)
- Central Laboratory, Universitas Padjadjaran, Jatinangor 45363, Indonesia;
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Singh Chauhan AN, Mali G, Dua G, Samant P, Kumar A, Erande RD. [RhCp*Cl 2] 2-Catalyzed Indole Functionalization: Synthesis of Bioinspired Indole-Fused Polycycles. ACS OMEGA 2023; 8:27894-27919. [PMID: 37576617 PMCID: PMC10413382 DOI: 10.1021/acsomega.3c02510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 07/11/2023] [Indexed: 08/15/2023]
Abstract
Polycyclic fused indoles are ubiquitous in natural products and pharmaceuticals due to their immense structural diversity and biological inference, making them suitable for charting broader chemical space. Indole-based polycycles continue to be fascinating as well as challenging targets for synthetic fabrication because of their characteristic structural frameworks possessing biologically intriguing compounds of both natural and synthetic origin. As a result, an assortment of new chemical processes and catalytic routes has been established to provide unified access to these skeletons in a very efficient and selective manner. Transition-metal-catalyzed processes, in particular from rhodium(III), are widely used in synthetic endeavors to increase molecular complexity efficiently. In recent years, this has resulted in significant progress in reaching molecular scaffolds with enormous biological activity based on core indole skeletons. Additionally, Rh(III)-catalyzed direct C-H functionalization and benzannulation protocols of indole moieties were one of the most alluring synthetic techniques to generate indole-fused polycyclic molecules efficiently. This review sheds light on recent developments toward synthesizing fused indoles by cascade annulation methods using Rh(III)-[RhCp*Cl2]2-catalyzed pathways, which align with the comprehensive and sophisticated developments in the field of Rh(III)-catalyzed indole functionalization. Here, we looked at a few intriguing cascade-based synthetic designs catalyzed by Rh(III) that produced elaborate frameworks inspired by indole bioactivity. The review also strongly emphasizes mechanistic insights for reaching 1-2, 2-3, and 3-4-fused indole systems, focusing on Rh(III)-catalyzed routes. With an emphasis on synthetic efficiency and product diversity, synthetic methods of chosen polycyclic carbocycles and heterocycles with at least three fused, bridged, or spiro cages are reviewed. The newly created synthesis concepts or toolkits for accessing diazepine, indol-ones, carbazoles, and benzo-indoles, as well as illustrative privileged synthetic techniques, are included in the featured collection.
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Affiliation(s)
| | - Ghanshyam Mali
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Garima Dua
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Priya Samant
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
| | - Akhilesh Kumar
- Department
of Chemistry and Nano Science, Ewha Womans
University, Seoul 03760, Korea
| | - Rohan D. Erande
- Department
of Chemistry, Indian Institute of Technology
Jodhpur, Jodhpur 342037, India
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3
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Rodrigues JM, Cendón B, Gulías M, Mascareñas JL, Queiroz MRP. Rhodium(III)‐Catalyzed Formal Cycloaddition between Thienopyridine/Thienopyrazine Carboxylic Acids and Alkynes, Triggered by C−H Activation. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Juliana M. Rodrigues
- Departamento/Centro de Química Universidade do Minho Campus de Gualtar 4710–057 Braga Portugal
| | - Borja Cendón
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica 15782 Santiago de Compostela Spain
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica 15782 Santiago de Compostela Spain
| | - José Luis Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS) and Departamento de Química Orgánica 15782 Santiago de Compostela Spain
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Wang L, Umezawa K. Cellular Signal Transductions and Their Inhibitors Derived from Deep-Sea Organisms. Mar Drugs 2021; 19:md19040205. [PMID: 33916424 PMCID: PMC8065634 DOI: 10.3390/md19040205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 03/30/2021] [Accepted: 04/02/2021] [Indexed: 12/11/2022] Open
Abstract
Not only physiological phenomena but also pathological phenomena can now be explained by the change of signal transduction in the cells of specific tissues. Commonly used cellular signal transductions are limited. They consist of the protein-tyrosine kinase dependent or independent Ras-ERK pathway, and the PI3K-Akt, JAK-STAT, SMAD, and NF-κB-activation pathways. In addition, biodegradation systems, such as the ubiquitin-proteasome pathway and autophagy, are also important for physiological and pathological conditions. If we can control signaling for each by a low-molecular-weight agent, it would be possible to treat diseases in new ways. At present, such cell signaling inhibitors are mainly looked for in plants, soil microorganisms, and the chemical library. The screening of bioactive metabolites from deep-sea organisms should be valuable because of the high incidence of finding novel compounds. Although it is still an emerging field, there are many successful examples, with new cell signaling inhibitors. In this review, we would like to explain the current view of the cell signaling systems important in diseases, and show the inhibitors found from deep-sea organisms, with their structures and biological activities. These inhibitors are possible candidates for anti-inflammatory agents, modulators of metabolic syndromes, antimicrobial agents, and anticancer agents.
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Affiliation(s)
- Liyan Wang
- Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China;
| | - Kazuo Umezawa
- Molecular Target Medicine, School of Medicine, Aichi Medical University, Nagakute 480-1195, Japan
- Correspondence: ; Tel.: +81-561-611-959
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Qi D, Zou L, Zhou D, Chen Y, Gao Z, Feng R, Zhang M, Li K, Xie J, Wang W. Taxonomy and Broad-Spectrum Antifungal Activity of Streptomyces sp. SCA3-4 Isolated From Rhizosphere Soil of Opuntia stricta. Front Microbiol 2019; 10:1390. [PMID: 31316480 PMCID: PMC6609889 DOI: 10.3389/fmicb.2019.01390] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 06/03/2019] [Indexed: 11/13/2022] Open
Abstract
Actinobacteria are important producers of bioactive compounds. Extreme ecosystems cause evolution of novel secondary metabolic pathways of Actinobacteria and increase the possible discovery of new biological functions of bioactive compounds. Here, we isolated 65 Actinobacteria from rhizosphere soil samples of Opuntia stricta. An Actinobacteria strain (named SCA3-4) was screened against Fusarium oxysporum f. sp. cubense Tropical Race 4 (Foc TR4, ATCC 76255). The strain produced pink-white aerial mycelia and brown substrate mycelium on Gause No. 1 agar. Biverticillate chains of cylindrical spores were observed by scanning electron microscopy (SEM). Based on alignment of 16S rRNA sequences, a constructed phylogenetic tree showed that strain SCA3-4 shared a 99.54% similarity with Streptomyces lilacinus NRRL B-1968T. The morphological, biochemical, physiological, and molecular characteristics further indicated that strain SCA3-4 belongs to the Streptomyces sp. It can grow well on medium with the following antibiotics chloramphenicol, streptomycin, penicillin-G, gentamicin, erythromycin, nystatin or neomycin sulfate. The polymerase chain reaction (PCR) amplification of types I and II polyketide synthase genes (PKS-I and PKS-II) suggested its bioactive potential. Under treatment with 100 μg/ml of ethyl acetate extracts isolated from Streptomyces sp. SCA3-4, growth of Foc TR4 was inhibited and cell membrane was destroyed. Crude extracts also showed a broad-spectrum antifungal activity against 13 phytopathogenic fungi including Foc TR4 and displayed the lowest minimum inhibitory concentration (MIC) (0.781 μg/ml) against Colletotrichum fragariae (ATCC 58718). A total of 21 different compounds identified by gas chromatography-mass spectrometry (GC-MS) were composed of phenolic compound, pyrrolizidine, hydrocarbons, esters, and acids. Besides the known active compounds, Streptomyces sp. SCA3-4 possesses antimicrobial or other biological activities. Further attention will be paid on other compounds with no functional annotation, aiming at the discovery of new bioactive substances.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Jianghui Xie
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Wei Wang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Sritharan T, Savitri Kumar N, Jayasinghe L, Araya H, Fujimoto Y. Isocoumarins and Dihydroisocoumarins From the Endophytic Fungus Biscogniauxia capnodes Isolated From the Fruits of Averrhoa carambola. Nat Prod Commun 2019. [DOI: 10.1177/1934578x19851969] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
An endophytic fungus Biscogniauxia capnodes was isolated from a popular edible fruit Averrhoa carambola. The fungus was fermented in potato dextrose broth for 3 weeks, and then the culture broth and mycelium were extracted with ethyl acetate. Chromatographic separation of this extract furnished 2 isocoumarins, reticulol (1) and 6- O-methyl-reticulol (2), and 2 dihydroisocoumarins, 5-methylmellein (3) and 7-hydroxy-5-methylmellein (4). Compound 1 showed moderate antioxidant activity against 2,2′-diphenyl-1-picrylhydrazyl radicals (IC50 value, 58 μg/mL). This is the first report of the isolation of B. capnodes as an endophyte, as well as the compounds 1 to 4 from B. capnodes.
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Affiliation(s)
| | | | | | - Hiroshi Araya
- School of Agriculture, Meiji University, Kawasaki, Japan
| | - Yoshinori Fujimoto
- National Institute of Fundamental Studies, Kandy, Sri Lanka
- School of Agriculture, Meiji University, Kawasaki, Japan
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7
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Shrestha R, Khanal HD, Lee YR. One-pot construction of diverse and functionalized isochromenoquinolinediones by Rh(iii)-catalyzed annulation of unprotected arylamides with 3-diazoquinolinediones and their application for fluorescence sensor. RSC Adv 2019; 9:17347-17357. [PMID: 35519845 PMCID: PMC9064558 DOI: 10.1039/c9ra03146d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Accepted: 05/27/2019] [Indexed: 01/10/2023] Open
Abstract
A facile and efficient Rh(iii)-catalyzed annulation of arylamides with 3-diazoquinolinediones for the construction of diverse and highly functionalized isochromenoquinolinediones is described. Furthermore, the methodology is applicable for delivering various relevant molecules such as pyridopyranoquinolindiones, thienopyranoquinolinones, and indolopyranoquinolinone. The reaction proceeds via cascade C–H activation, carbene insertion, and intramolecular lactonization. The reaction exhibits high atom economy, good functional group tolerance, and high regioselectivity. The synthesized compound can also behave as a potent fluorescence sensor for Fe3+ ion. An efficient Rh(iii)-catalyzed annulation of arylamides with 3-diazoquinolinediones for the construction of diverse and highly functionalized isochromenoquinolinedione derivatives is described.![]()
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Affiliation(s)
- Rajeev Shrestha
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 38541
- Republic of Korea
| | - Hari Datta Khanal
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 38541
- Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 38541
- Republic of Korea
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8
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Koca M, Ertürk AS, Umaz A. Microwave-assisted intermolecular aldol condensation: Efficient one-step synthesis of 3-acetyl isocoumarin and optimization of different reaction conditions. ARAB J CHEM 2018. [DOI: 10.1016/j.arabjc.2015.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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9
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Saikia P, Gogoi S. Isocoumarins: General Aspects and Recent Advances in their Synthesis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800019] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pallabi Saikia
- Department of Chemistry; Assam Kaziranga University; Jorhat - 785006 Assam India
| | - Sanjib Gogoi
- Chemical Sciences & Technology Division, CSIR - North East Institute of Science and Technology; AcSIR; Jorhat - 785006 Assam India
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10
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Wu TY, Dhole S, Selvaraju M, Sun CM. Regioselective Synthesis of Pyranone-Fused Indazoles via Reductive Cyclization and Alkyne Insertion. ACS COMBINATORIAL SCIENCE 2018; 20:156-163. [PMID: 29381854 DOI: 10.1021/acscombsci.7b00170] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel and efficient method for the one-pot synthesis of 2 H-indazole from readily available building blocks is reported. The reaction of 2-nitrobenzylamines with zinc and ammonium formate underwent partial reduction to nitroso-benzylamine followed by an intramolecular cyclization to afford 2 H-indazole via N-N bond formation. The carboxylic acid moiety of indazole was proceeded to regioselective alkyne insertion under ruthenium catalysis to form pyranone-fused indazoles. The regioselectivity is influenced by the weak coordination of indazole ring nitrogen to the metal center.
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Affiliation(s)
- Tz-Yi Wu
- Department of Applied Chemistry, National Chiao-Tung University, 1001, Ta-Hseuh Road, Hsinchu 300-10, Taiwan
| | - Sandip Dhole
- Department of Applied Chemistry, National Chiao-Tung University, 1001, Ta-Hseuh Road, Hsinchu 300-10, Taiwan
| | - Manikandan Selvaraju
- Department of Applied Chemistry, National Chiao-Tung University, 1001, Ta-Hseuh Road, Hsinchu 300-10, Taiwan
| | - Chung-Ming Sun
- Department of Applied Chemistry, National Chiao-Tung University, 1001, Ta-Hseuh Road, Hsinchu 300-10, Taiwan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, 100, Shih-Chuan first Road, Kaohsiung 807-08, Taiwan
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Shoji T, Tanaka M, Takagaki S, Miura K, Ohta A, Sekiguchi R, Ito S, Mori S, Okujima T. Synthesis of azulene-substituted benzofurans and isocoumarins via intramolecular cyclization of 1-ethynylazulenes, and their structural and optical properties. Org Biomol Chem 2018; 16:480-489. [PMID: 29270584 DOI: 10.1039/c7ob02861j] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The preparation of azulene-substituted benzofurans and isocoumarins was established by two types of intramolecular cyclization reaction of 1-ethynylazulenes.
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Affiliation(s)
- Taku Shoji
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Miwa Tanaka
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Sho Takagaki
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Kota Miura
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Akira Ohta
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Ryuta Sekiguchi
- Graduate School of Science and Technology
- Shinshu University
- Matsumoto
- Japan
| | - Shunji Ito
- Graduate School of Science and Technology
- Hirosaki University
- Hirosaki 036-8561
- Japan
| | - Shigeki Mori
- Advanced Research Support Center
- Ehime University
- Matsuyama 790-8577
- Japan
| | - Tetsuo Okujima
- Department of Chemistry and Biology
- Graduate School of Science and Engineering
- Ehime University
- Matsuyama 790-8577
- Japan
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Neog K, Dutta D, Das B, Gogoi P. Coumarin to Isocoumarin: One-Pot Synthesis of 3-Substituted Isocoumarins from 4-Hydroxycoumarins and Benzyne Precursors. Org Lett 2017; 19:730-733. [DOI: 10.1021/acs.orglett.7b00027] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kashmiri Neog
- Applied Organic
Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Dhiraj Dutta
- Applied Organic
Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Babulal Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Pranjal Gogoi
- Applied Organic
Chemistry Group, Chemical Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
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13
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Chen B, Ma S. Tandem Michael Addition/Cyclization Reaction of 2,3-Allenoates with Organozincs: Facile Synthesis of Isocoumarins. Org Lett 2013; 15:3884-7. [DOI: 10.1021/ol401625t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Bo Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai, 200062, P. R. China
| | - Shengming Ma
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China, and Shanghai Key Laboratory of Green Chemistry and Chemical Process, Department of Chemistry, East China Normal University, 3663 North Zhongshan Lu, Shanghai, 200062, P. R. China
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14
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Sperança A, Godoi B, Pinton S, Back DF, Menezes PH, Zeni G. Regioselective Synthesis of Isochromenones by Iron(III)/PhSeSePh-Mediated Cyclization of 2-Alkynylaryl Esters. J Org Chem 2011; 76:6789-97. [DOI: 10.1021/jo201211s] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Paulo H. Menezes
- Departamento de Química Fundamental Universidade Federal de Pernambuco Recife, Pernambuco 50670-901, Brazil
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15
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Yan SJ, Chen YL, Liu L, Tang YJ, Lin J. Synthesis of novel tetracyclo-isocoumarins via AcOH-catalyzed cascade reaction of heterocyclic ketene aminals with 2,2-dihydroxy-2H-indene-1,3-dione. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.11.100] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Roy S, Roy S, Neuenswander B, Hill D, Larock RC. Solution-phase synthesis of a diverse isocoumarin library. JOURNAL OF COMBINATORIAL CHEMISTRY 2009; 11:1128-35. [PMID: 19817453 PMCID: PMC2785110 DOI: 10.1021/cc9001197] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The solution-phase synthesis of a 167-member library of isocoumarins is described. The key intermediates for library generation, 4-iodoisocoumarins, are easily prepared by iodocyclization of the corresponding 2-(1-alkynyl)arenecarboxylate esters. The 4-iodoisocoumarins undergo palladium-catalyzed Sonogashira, Suzuki-Miyura, and Heck reactions to yield a diverse set of isocoumarins. Alternatively, isocoumarins, bearing hydroxyl or bromine functionalities, have been prepared by ZnCl(2)- and Pd(PPh(3))(4)-mediated cyclization of the corresponding o-iodobenzoic acid and appropriate terminal alkynes. The resulting isocoumarins were further diversified by derivatization of the hydroxyl or bromine groups. A small set of isoquinolinones were also prepared from the corresponding isocoumarins.
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Affiliation(s)
- Sujata Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Sudipta Roy
- Department of Chemistry, Iowa State University, Ames, Iowa 50011
| | - Benjamin Neuenswander
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
| | - David Hill
- The University of Kansas NIH Center of Excellence in Chemical Methodologies and Library Development, Lawrence, Kansas, 66047
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17
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Saeed A. Microwave‐Assisted Synthesis of cAMP Phosphodiesterase Inhibitor 8‐Hydroxy‐6,7‐dimethoxy‐3‐hydroxymethylisocoumarin. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910701228778] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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An Efficient Synthesis of 8-Hydroxy-6,7-dimethoxy-3-methylisocoumarin (6-O-methylreticulol). Chem Heterocycl Compd (N Y) 2005. [DOI: 10.1007/s10593-006-0005-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Voura EB, Jaiswal JK, Mattoussi H, Simon SM. Tracking metastatic tumor cell extravasation with quantum dot nanocrystals and fluorescence emission-scanning microscopy. Nat Med 2004; 10:993-8. [PMID: 15334072 DOI: 10.1038/nm1096] [Citation(s) in RCA: 421] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2004] [Accepted: 06/28/2004] [Indexed: 11/10/2022]
Abstract
Metastasis is an impediment to the development of effective cancer therapies. Our understanding of metastasis is limited by our inability to follow this process in vivo. Fluorescence microscopy offers the potential to follow cells at high resolution in living animals. Semiconductor nanocrystals, quantum dots (QDs), offer considerable advantages over organic fluorophores for this purpose. We used QDs and emission spectrum scanning multiphoton microscopy to develop a means to study extravasation in vivo. Although QD labeling shows no deleterious effects on cultured cells, concern over their potential toxicity in vivo has caused resistance toward their application to such studies. To test if effects of QD labeling emerge in vivo, tumor cells labeled with QDs were intravenously injected into mice and followed as they extravasated into lung tissue. The behavior of QD-labeled tumor cells in vivo was indistinguishable from that of unlabeled cells. QDs and spectral imaging allowed the simultaneous identification of five different populations of cells using multiphoton laser excitation. Besides establishing the safety of QDs for in vivo studies, our approach permits the study of multicellular interactions in vivo.
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Affiliation(s)
- Evelyn B Voura
- The Rockefeller University, Box 304, 1230 York Avenue, New York, New York, USA
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