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Dhotare BB, Kumar M, Nayak SK. Catalytic Oxidation of 3-Arylbenzofuran-2(3H)-ones with PCC-H5IO6: Syntheses of 3-Aryl-3-hydroxy/3-amido-3-arylbenzofuran-2(3H)-ones. J Org Chem 2018; 83:10089-10096. [DOI: 10.1021/acs.joc.8b01395] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Egbewande FA, Sadowski MC, Levrier C, Tousignant KD, White JM, Coster MJ, Nelson CC, Davis RA. Identification of Gibberellic Acid Derivatives That Deregulate Cholesterol Metabolism in Prostate Cancer Cells. JOURNAL OF NATURAL PRODUCTS 2018; 81:838-845. [PMID: 29474071 DOI: 10.1021/acs.jnatprod.7b00929] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The naturally occurring pentacyclic diterpenoid gibberellic acid (1) was used in the generation of a drug-like amide library using parallel-solution-phase synthesis. Prior to the synthesis, a virtual library was generated and prioritized based on drug-like physicochemical parameters such as log P, hydrogen bond donor/acceptor counts, and molecular weight. The structures of the synthesized analogues (2-13) were elucidated following analysis of the NMR, MS, UV, and IR data. Compound 12 afforded crystalline material, and its structure was confirmed by X-ray crystallographic analysis. All compounds were evaluated in vitro for cytotoxicity and deregulation of lipid metabolism in LNCaP prostate cancer cells. While no cytotoxic activity was identified at the concentrations tested, synthesized analogues 3, 5, 7, 10, and 11 substantially reduced cellular uptake of free cholesterol in prostate cancer cells, suggesting a novel role of gibberellic acid derivatives in deregulating cholesterol metabolism.
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Affiliation(s)
- Folake A Egbewande
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Martin C Sadowski
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation , Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane , QLD 4102 , Australia
| | - Claire Levrier
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation , Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane , QLD 4102 , Australia
| | - Kaylyn D Tousignant
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation , Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane , QLD 4102 , Australia
| | - Jonathan M White
- School of Chemistry and Bio21 Institute , The University of Melbourne , Melbourne , Victoria 3010 , Australia
| | - Mark J Coster
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
| | - Colleen C Nelson
- Australian Prostate Cancer Research Centre-Queensland, Institute of Health and Biomedical Innovation , Queensland University of Technology, Princess Alexandra Hospital, Translational Research Institute , Brisbane , QLD 4102 , Australia
| | - Rohan A Davis
- Griffith Institute for Drug Discovery , Griffith University , Brisbane , QLD 4111 , Australia
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Meng TZ, Zheng J, Trieu TH, Zheng B, Wu JJ, Zhang Y, Shi XX. CuBr 2-Catalyzed Mild Oxidation of 3,4-Dihydro-β-Carbolines and Application in Total Synthesis of 6-Hydroxymetatacarboline D. ACS OMEGA 2018; 3:544-553. [PMID: 31457912 PMCID: PMC6641302 DOI: 10.1021/acsomega.7b01908] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 12/26/2017] [Indexed: 06/10/2023]
Abstract
A green chemical method for the conversion of 3,4-dihydro-β-carbolines to β-carbolines has been developed using air as the oxidant. With 15 mol % CuBr2 as the catalyst, 3,4-dihydro-β-carbolines could be efficiently oxidized to β-carbolines in dimethyl sulfoxide at room temperature in the presence of 1,8-diazabicyclo[5,4,0]undec-7-ene (or Et3N). By applying this method, the first total synthesis of 6-hydroxymetatacarboline D was performed through 12 steps in 22% overall yield starting from l-5-hydroxy-tryptophan.
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Affiliation(s)
- Tian-Zhuo Meng
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Jie Zheng
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Tien Ha Trieu
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Bo Zheng
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Jia-Jia Wu
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Yi Zhang
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
| | - Xiao-Xin Shi
- Shanghai
Key Laboratory of Chemical Biology, School of Pharmacy and Department of
Pharmaceutical Engineering, School of Pharmacy, East China University of Science and Technology, 130 Mei-Long Road, Shanghai 200237, P. R. China
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Abstract
Covering: 2015. Previous review: Nat. Prod. Rep., 2016, 33, 382-431This review covers the literature published in 2015 for marine natural products (MNPs), with 1220 citations (792 for the period January to December 2015) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1340 in 429 papers for 2015), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | - Murray H G Munro
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
| | - Michèle R Prinsep
- Chemistry, School of Science, University of Waikato, Hamilton, New Zealand
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Khokhar S, Pierens GK, Hooper JNA, Ekins MG, Feng Y, Davis RA. Rhodocomatulin-Type Anthraquinones from the Australian Marine Invertebrates Clathria hirsuta and Comatula rotalaria. JOURNAL OF NATURAL PRODUCTS 2016; 79:946-953. [PMID: 27063022 DOI: 10.1021/acs.jnatprod.5b01029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Chemical investigations of an Australian sponge, Clathria hirsuta, from the Great Barrier Reef, have resulted in the isolation of two known anthraquinones, rhodocomatulin 5,7-dimethyl ether (1) and rhodocomatulin 7-methyl ether (2). Additionally, four new anthraquinone metabolites, 6-methoxyrhodocomatulin 7-methyl ether, 3-bromo-6-methoxy-12-desethylrhodocomatulin 7-methyl ether, 3-bromo-6-methoxyrhodocomatulin 7-methyl ether, and 3-bromorhodocomatulin 7-methyl ether (3-6), were also isolated and characterized. This is the first report of the rhodocomatulin-type anthraquinones from a marine sponge, as 1 and 2 were previously isolated from the marine crinoid genus Comatula. An additional chemical investigation of the marine crinoid Comatula rotalaria enabled the isolation of further quantities of 1 and 2, as well as two additional new crinoid metabolites, 12-desethylrhodocomatulin 5,7-dimethyl ether and 12-desethylrhodocomatulin 7-methyl ether (7 and 8). An NMR spectroscopic analysis of compounds 7 and 8 provided further insight into the rhodocomatulin planar structure and, together with the successful implementation of DFT-NMR calculations, confirmed that the rhodocomatulin metabolites existed as para rather than ortho quinones.
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Affiliation(s)
- Shahan Khokhar
- Eskitis Institute, Griffith University , Brisbane, QLD 4111, Australia
| | - Gregory K Pierens
- Centre for Advanced Imaging, The University of Queensland , Brisbane, QLD 4072, Australia
| | - John N A Hooper
- Eskitis Institute, Griffith University , Brisbane, QLD 4111, Australia
- Queensland Museum , South Brisbane, QLD 4101, Australia
| | | | - Yunjiang Feng
- Eskitis Institute, Griffith University , Brisbane, QLD 4111, Australia
| | - Rohan A Davis
- Eskitis Institute, Griffith University , Brisbane, QLD 4111, Australia
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ent-Kauranoids isolated from Isodon eriocalyx var. laxiflora and their structure activity relationship analyses. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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