1
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O
2
‐Assisted Four‐Component Reaction of Vinyl Magnesium Bromide with Chiral
N
‐
tert
‐Butanesulfinyl Imines To Form
syn
‐1,3‐Amino Alcohols. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109566] [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]
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2
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Wang R, Luo J, Zheng C, Zhang H, Gao L, Song Z. O 2 -Assisted Four-Component Reaction of Vinyl Magnesium Bromide with Chiral N-tert-Butanesulfinyl Imines To Form syn-1,3-Amino Alcohols. Angew Chem Int Ed Engl 2021; 60:24644-24649. [PMID: 34523225 DOI: 10.1002/anie.202109566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Indexed: 11/10/2022]
Abstract
An O2 -assisted, four-component reaction has been developed to synthesize a wide range of syn-1,3-amino alcohols in one step. The reaction proceeds by oxygenation of vinyl magnesium bromide (component-I) with O2 (component-II) to give a magnesium enolate of acetaldehyde, which undergoes addition to a chiral N-tert-butanesulfinyl imine (component-III) followed by a sequential addition with excess vinyl magnesium bromide (component-IV). The approach allows diastereoselective synthesis of anti/syn- and syn/syn-3-amino-1,5-diols in good yields with high diastereoselectivity. The method was illustrated in an efficient, four-step synthesis of piperidine alkaloid (-)-2'-epi-ethylnorlobelol.
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Affiliation(s)
- Runping Wang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Jingfan Luo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Chunmei Zheng
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Hongyun Zhang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Lu Gao
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Zhenlei Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
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3
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Dasari SR, Seelam N, Jayachandra S, Vadali LR, Yerva ER, Tondepu S, Gadakar MK. Synthesis and Characterization of Compounds Potentially Related to the Janus Kinase Inhibitor Baricitinib. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019100166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Cockram PE, Smith TK. Active Natural Product Scaffolds against Trypanosomatid Parasites: A Review. JOURNAL OF NATURAL PRODUCTS 2018; 81:2138-2154. [PMID: 30234295 DOI: 10.1021/acs.jnatprod.8b00159] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Neglected tropical diseases caused by trypanosomatid parasites are a continuing and escalating problem, which devastate the less economically developed cultures in countries in which they are endemic by impairing both human and animal health. Current drugs for these diseases are regarded as out-of-date and expensive, with unacceptable side-effects and mounting parasite resistance, meaning there is an urgent need for new therapeutics. Natural products have long been a source of potent, structurally diverse bioactive molecules. Herein are reviewed natural products with reported trypanocidal activity, which have been clustered based on core structural similarities, to aid the future discovery of new trypanocidal core motifs with potential routes to synthetically accessible natural product cores suggested.
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Affiliation(s)
- Peter E Cockram
- Biomedical Sciences Research Complex , University of St Andrews , North Haugh , St Andrews , Scotland , KY16 9ST
| | - Terry K Smith
- Biomedical Sciences Research Complex , University of St Andrews , North Haugh , St Andrews , Scotland , KY16 9ST
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5
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Synthesis of five natural butanolides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Persico M, Fattorusso R, Taglialatela-Scafati O, Chianese G, de Paola I, Zaccaro L, Rondinelli F, Lombardo M, Quintavalla A, Trombini C, Fattorusso E, Fattorusso C, Farina B. The interaction of heme with plakortin and a synthetic endoperoxide analogue: new insights into the heme-activated antimalarial mechanism. Sci Rep 2017; 7:45485. [PMID: 28383076 PMCID: PMC5382535 DOI: 10.1038/srep45485] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 02/28/2017] [Indexed: 12/13/2022] Open
Abstract
In the present work we performed a combined experimental and computational study on the interaction of the natural antimalarial endoperoxide plakortin and its synthetic analogue 4a with heme. Obtained results indicate that the studied compounds produce reactive carbon radical species after being reductively activated by heme. In particular, similarly to artemisinin, the formation of radicals prone to inter-molecular reactions should represent the key event responsible for Plasmodium death. To our knowledge this is the first experimental investigation on the reductive activation of simple antimalarial endoperoxides (1,2-dioxanes) by heme and results were compared to the ones previously obtained from the reaction with FeCl2. The obtained experimental data and the calculated molecular interaction models represent crucial tools for the rational optimization of our promising class of low-cost synthetic antimalarial endoperoxides.
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Affiliation(s)
- Marco Persico
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Roberto Fattorusso
- Second University of Naples, Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Via Vivaldi 43, Caserta, 81100, Italy.,Institute of Biostructures and Bioimages (IBB) CNR, Via Mezzocannone 16, Naples, 80134, Italy
| | - Orazio Taglialatela-Scafati
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Giuseppina Chianese
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Ivan de Paola
- Institute of Biostructures and Bioimages (IBB) CNR, Via Mezzocannone 16, Naples, 80134, Italy
| | - Laura Zaccaro
- Institute of Biostructures and Bioimages (IBB) CNR, Via Mezzocannone 16, Naples, 80134, Italy
| | - Francesca Rondinelli
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Marco Lombardo
- Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy.,Alma Mater Studiorum University of Bologna, Department of Chemistry "G. Ciamician", Via Selmi 2, Bologna, 40126, Italy
| | - Arianna Quintavalla
- Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy.,Alma Mater Studiorum University of Bologna, Department of Chemistry "G. Ciamician", Via Selmi 2, Bologna, 40126, Italy
| | - Claudio Trombini
- Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy.,Alma Mater Studiorum University of Bologna, Department of Chemistry "G. Ciamician", Via Selmi 2, Bologna, 40126, Italy
| | - Ernesto Fattorusso
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Caterina Fattorusso
- University of Naples "Federico II", Department of Pharmacy, Via D. Montesano 49, Napoli, 80131, Italy.,Italian Malaria Network - Centro Interuniversitario di Ricerca Sulla Malaria (CIRM) Department of Experimental Medicine and Biochemical Science, Via Del Giochetto, Perugia, Italy
| | - Biancamaria Farina
- Institute of Biostructures and Bioimages (IBB) CNR, Via Mezzocannone 16, Naples, 80134, Italy.,Advanced Accelerator Applications, Via Vivaldi 43, Caserta, 81100, Italy
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Computer-Aided Drug Discovery from Marine Compounds: Identification of the Three-Dimensional Structural Features Responsible for Antimalarial Activity. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2017. [PMID: 28238037 DOI: 10.1007/978-3-319-51284-6_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
An integrated computational approach, based on molecular dynamics/mechanics, semi-empirical, and DFT calculations as well as dynamic docking studies, has been employed to gain insight into the mechanism of action of new antimalarial agents characterized by the scaffold of the marine compounds plakortin and aplidinone. The results of this approach show that these molecules, after interaction with Fe(II), likely coming from the heme molecule, give rise to the formation of radical species, that should represent the toxic intermediates responsible for subsequent reactions leading to plasmodium death. The three-dimensional structural requirements necessary for the activity of these new classes of antimalarial agents have been identified and discussed throughout the chapter.
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Persico M, Di Dato A, Orteca N, Cimino P, Novellino E, Fattorusso C. Use of Integrated Computational Approaches in the Search for New Therapeutic Agents. Mol Inform 2016; 35:309-25. [DOI: 10.1002/minf.201501028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 06/21/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Marco Persico
- Department of Pharmacy, University of Naples “Federico II”; Via D. Montesano 49 80131 Napoli Italy
- Italian Malaria Network - Centro Interuniversitario di Ricerche Sulla Malaria (CIRM); Department of Experimental Medicine and Biochemical Sciences; Via Del Giochetto 06126 Perugia Italy
| | - Antonio Di Dato
- Department of Pharmacy, University of Naples “Federico II”; Via D. Montesano 49 80131 Napoli Italy
- Italian Malaria Network - Centro Interuniversitario di Ricerche Sulla Malaria (CIRM); Department of Experimental Medicine and Biochemical Sciences; Via Del Giochetto 06126 Perugia Italy
| | - Nausicaa Orteca
- Department of Pharmacy, University of Naples “Federico II”; Via D. Montesano 49 80131 Napoli Italy
- Italian Malaria Network - Centro Interuniversitario di Ricerche Sulla Malaria (CIRM); Department of Experimental Medicine and Biochemical Sciences; Via Del Giochetto 06126 Perugia Italy
| | - Paola Cimino
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano, Salerno Italy
| | - Ettore Novellino
- Department of Pharmacy, University of Naples “Federico II”; Via D. Montesano 49 80131 Napoli Italy
| | - Caterina Fattorusso
- Department of Pharmacy, University of Naples “Federico II”; Via D. Montesano 49 80131 Napoli Italy
- Italian Malaria Network - Centro Interuniversitario di Ricerche Sulla Malaria (CIRM); Department of Experimental Medicine and Biochemical Sciences; Via Del Giochetto 06126 Perugia Italy
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Norris MD, Perkins MV. Structural diversity and chemical synthesis of peroxide and peroxide-derived polyketide metabolites from marine sponges. Nat Prod Rep 2016; 33:861-80. [DOI: 10.1039/c5np00142k] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The structural elucidation, chemical synthesis and therapeutic potential of peroxide and peroxide-derived sponge metabolites, with special focus on their intriguing structural similarities and differences from a biogenetic perspective, are reviewed.
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Affiliation(s)
- Matthew D. Norris
- School of Chemical and Physical Sciences
- Flinders University
- Adelaide
- Australia
| | - Michael V. Perkins
- School of Chemical and Physical Sciences
- Flinders University
- Adelaide
- Australia
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Carbó-Dorca R, Barragán D. Communications on quantum similarity (4): collective distances computed by means of similarity matrices, as generators of intrinsic ordering among quantum multimolecular polyhedra. WILEY INTERDISCIPLINARY REVIEWS: COMPUTATIONAL MOLECULAR SCIENCE 2015. [DOI: 10.1002/wcms.1223] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ramon Carbó-Dorca
- Institut de Química Computacional i Catàlisi; Universitat de Girona; Girona Spain
- Departamento de Química; Universidad Técnica Particular de Loja; Loja Ecuador
| | - Diego Barragán
- Departamento de Ciencias de la Computación y Electrónica; Universidad Técnica Particular de Loja; Loja Ecuador
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11
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Chianese G, Persico M, Yang F, Lin HW, Guo YW, Basilico N, Parapini S, Taramelli D, Taglialatela-Scafati O, Fattorusso C. Endoperoxide polyketides from a Chinese Plakortis simplex: further evidence of the impact of stereochemistry on antimalarial activity of simple 1,2-dioxanes. Bioorg Med Chem 2014; 22:4572-80. [PMID: 25115700 DOI: 10.1016/j.bmc.2014.07.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/18/2014] [Accepted: 07/20/2014] [Indexed: 11/30/2022]
Abstract
Chemical investigation of the organic extract obtained from the sponge Plakortis simplex collected in the South China Sea afforded five new polyketide endoperoxides (2 and 4-7), along with two known analogues (1 and 3). The stereostructures of these metabolites have been deduced on the basis of spectroscopic analysis and chemical conversion. The isolated endoperoxide derivatives have been tested for their in vitro antimalarial activity against Plasmodium falciparum strains, showing IC50 values in the low micromolar range. The structure-activity relationships were analyzed by means of a detailed computational investigation and rationalized in the light of the mechanism of action proposed for this class of simple antimalarials. The relative orientation of the atoms involved in the putative radical generation and transfer reaction was demonstrated to have a great impact on the antimalarial activity. The resulting 3D pharmacophoric model can be a useful guide to design simple and effective antimalarial lead compounds belonging to the class of 1,2-dioxanes.
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Affiliation(s)
- Giuseppina Chianese
- Dipartimento di Farmacia, Università di Napoli 'Federico II', Via D. Montesano 49, 80131 Napoli, Italy
| | - Marco Persico
- Dipartimento di Farmacia, Università di Napoli 'Federico II', Via D. Montesano 49, 80131 Napoli, Italy
| | - Fan Yang
- Key Laboratory for Marine Drugs, Department of Pharmacy, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Hou-Wen Lin
- Key Laboratory for Marine Drugs, Department of Pharmacy, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China.
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zu Chong Zhi Road 555, Shanghai 201203, China
| | - Nicoletta Basilico
- Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche, Università di Milano, Via Pascal 36, I-20133 Milano, Italy
| | - Silvia Parapini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, Via Pascal 36, I-20133 Milano, Italy
| | - Donatella Taramelli
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, Via Pascal 36, I-20133 Milano, Italy
| | | | - Caterina Fattorusso
- Dipartimento di Farmacia, Università di Napoli 'Federico II', Via D. Montesano 49, 80131 Napoli, Italy
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Lombardo M, Sonawane DP, Quintavalla A, Trombini C, Dhavale DD, Taramelli D, Corbett Y, Rondinelli F, Fattorusso C, Persico M, Taglialatela-Scafati O. Optimized Synthesis and Antimalarial Activity of 1,2-Dioxane-4-carboxamides. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301394] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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13
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Further optimization of plakortin pharmacophore: structurally simple 4-oxymethyl-1,2-dioxanes with promising antimalarial activity. Eur J Med Chem 2013; 70:875-86. [PMID: 24262380 DOI: 10.1016/j.ejmech.2013.10.050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 10/16/2013] [Accepted: 10/18/2013] [Indexed: 11/23/2022]
Abstract
For the optimization of the plakortin pharmacophore, we recently proposed a straightforward synthesis of 4-carbomethoxy-3-methoxy-1,2-dioxanes as potential antimalarial drug candidates. Herein we report the chemoselective reduction of the 4-carbomethoxy group which has allowed us to prepare in good yields twenty-four new endoperoxides carrying either the hydroxymethyl or the methoxymethyl group on C4 in various stereochemical arrangements with respect to the alkyl groups on C3 and C6 (the endoperoxide carbons). Some of these compounds showed promising in vitro antimalarial activities, both against chloroquine-resistant (CQ-R) and susceptible (CQ-S) strains of Plasmodium falciparum, with IC₅₀ values in the range of 0.5-1.0 μM. Compound 8g showed activity against the CQ-R strain comparable to that of the structurally more demanding plakortin.
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Mahmoodi NO, Shoja S, Sharifzadeh B, Rassa M. Regioselective synthesis and antibacterial evaluation of novel bis-pyrimidine derivatives via a three-component reaction. Med Chem Res 2013. [DOI: 10.1007/s00044-013-0731-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Natural and semisynthetic analogues of manadoperoxide B reveal new structural requirements for trypanocidal activity. Mar Drugs 2013; 11:3297-308. [PMID: 23989650 PMCID: PMC3806476 DOI: 10.3390/md11093297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 08/16/2013] [Accepted: 08/19/2013] [Indexed: 01/08/2023] Open
Abstract
Chemical analysis of the Indonesian sponge Plakortis cfr. lita afforded two new analogues of the potent trypanocidal agent manadoperoxide B (1), namely 12-isomanadoperoxide B (2) and manadoperoxidic acid B (3). These compounds were isolated along with a new short chain dicarboxylate monoester (4), bearing some interesting relationships with the polyketide endoperoxides found in this sponge. Some semi-synthetic analogues of manadoperoxide B (6–8) were prepared and evaluated for antitrypanosomal activity and cytotoxicity. These studies revealed crucial structure–activity relationships that should be taken into account in the design of optimized and simplified endoperoxyketal trypanocidal agents.
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New antimalarial polyketide endoperoxides from the marine sponge Plakinastrella mamillaris collected at Fiji Islands. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Carbó-Dorca R. Notes on quantitative structure-property relationships (QSPR), part 3: Density functions origin shift as a source of quantum QSPR algorithms in molecular spaces. J Comput Chem 2012; 34:766-79. [DOI: 10.1002/jcc.23198] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 11/08/2012] [Accepted: 11/14/2012] [Indexed: 12/14/2022]
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18
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Liu H, Dong C, Zhang Z, Wu P, Jiang X. Transition-Metal-Free Aerobic Oxidative Cleavage of CC Bonds in α-Hydroxy Ketones and Mechanistic Insight to the Reaction Pathway. Angew Chem Int Ed Engl 2012; 51:12570-4. [DOI: 10.1002/anie.201207206] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Indexed: 11/08/2022]
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19
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Liu H, Dong C, Zhang Z, Wu P, Jiang X. Transition-Metal-Free Aerobic Oxidative Cleavage of CC Bonds in α-Hydroxy Ketones and Mechanistic Insight to the Reaction Pathway. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207206] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Chianese G, Fattorusso E, Scala F, Teta R, Calcinai B, Bavestrello G, Dien HA, Kaiser M, Tasdemir D, Taglialatela-Scafati O. Manadoperoxides, a new class of potent antitrypanosomal agents of marine origin. Org Biomol Chem 2012; 10:7197-207. [PMID: 22859016 DOI: 10.1039/c2ob26124c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chemical investigation of the marine sponge Plakortis cfr. lita afforded a library of endoperoxyketal polyketides, manadoperoxides B-K (3-5 and 7-13) and peroxyplakoric esters B(3) (6) and C (14). Eight of these metabolites are new compounds and some contain an unprecedented chlorine-bearing THF-type ring in the side chain. The library of endoperoxide derivatives was evaluated for in vitro activity against Trypanosoma brucei rhodesiense and Leishmania donovani. Some compounds, such as manadoperoxide B, exhibited ultrapotent trypanocidal activity (IC(50) = 3 ng mL(-1)) without cytotoxicity. Detailed examination of the antitrypanosomal activity data and comparison with those available in the literature for related dioxane derivatives enabled us to draw a series of structure-activity relationships. Interestingly, it appears that minor structural changes, such as a shift of the methyl group around the dioxane ring, can dramatically affect the antitrypanosomal activity. This information can be valuable to guide the design of optimized antitrypanosomal agents based on the dioxane scaffold.
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Affiliation(s)
- Giuseppina Chianese
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli Federico II, Napoli, Italy
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Persico M, Quintavalla A, Rondinelli F, Trombini C, Lombardo M, Fattorusso C, Azzarito V, Taramelli D, Parapini S, Corbett Y, Chianese G, Fattorusso E, Taglialatela-Scafati O. A new class of antimalarial dioxanes obtained through a simple two-step synthetic approach: rational design and structure-activity relationship studies. J Med Chem 2011; 54:8526-40. [PMID: 22054038 DOI: 10.1021/jm201056j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A new series of simple endoperoxides, characterized by a 3-methoxy-1,2-dioxane scaffold, was designed on the basis of a previously developed pharmacophore. Through a simplified and versatile scheme of synthesis, which utilizes cheap and commercially available starting materials, it was possible to obtain several structurally and stereochemically different compounds that were tested against P. falciparum. Most of compounds showed antimalarial activity in the low micromolar range and no cellular toxicity, all being significantly more active on chloroquine resistant (CQ-R) than on chloroquine sensitive (CQ-S) strains. Resulting structure-activity relationships were analyzed by means of experimental and computational techniques, validating our design rationale and tailoring it for the new scaffold. Our study demonstrated that according to the hypothesized mechanism of action, the antimalarial activity can be improved through rational structural modifications, paving the way for the development of new simplified antimalarial endoperoxides.
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Affiliation(s)
- Marco Persico
- Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli Federico II, Via D. Montesano, 49 I-80131 Napoli, Italy
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