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Bréard D, Viault G, Mezier MC, Pagie S, Bruguière A, Richomme P, Charreau B, Derbré S. Additional Insights into Hypericum perforatum Content: Isolation, Total Synthesis, and Absolute Configuration of Hyperbiphenyls A and B from Immunomodulatory Root Extracts. JOURNAL OF NATURAL PRODUCTS 2018; 81:1850-1859. [PMID: 30024167 DOI: 10.1021/acs.jnatprod.8b00325] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Phytochemical investigation of the root extracts of Hypericum perforatum led to the isolation of two biphenyl derivatives named hyperbiphenyls A and B (1 and 2) and four known xanthones (3-6). These structures were elucidated by spectroscopic and spectrometric methods including UV, NMR, and HRMS. The absolute configuration of the biphenyl derivatives was defined by two different approaches: biomimetic total synthesis of racemic hyperbiphenyl A followed by 1H and 19F NMR Mosher's esters analysis and stereoselective total synthesis of hyperbiphenyl B, permitting assignment of the S absolute configuration for both compounds. The bioactivity of compounds 1-6 toward a set of biomolecules, including major histocompatibility complex (MHC) molecules expressed on vascular endothelial cells, was measured. The results showed that the major xanthone, i.e., 5- O-methyl-2-deprenylrheediaxanthone B (3), is a potent inhibitor of MHC that efficiently reduces HLA-E, MHC-II, and MICA biomolecules on cell surfaces.
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Affiliation(s)
- Dimitri Bréard
- EA921 SONAS, SFR4207 QUASAV, UNIV Angers , Université Bretagne Loire , 49035 Angers , France
| | - Guillaume Viault
- EA921 SONAS, SFR4207 QUASAV, UNIV Angers , Université Bretagne Loire , 49035 Angers , France
| | - Marie-Charlotte Mezier
- Centre de Recherche en Transplantation et Immunologie (CRTI), UMR1064, INSERM , Université de Nantes , 44093 Nantes , France
- CHU de Nantes, Institut de Transplantation-Urologie-Néphrologie , 44200 Nantes , France
| | - Sylvain Pagie
- Centre de Recherche en Transplantation et Immunologie (CRTI), UMR1064, INSERM , Université de Nantes , 44093 Nantes , France
- CHU de Nantes, Institut de Transplantation-Urologie-Néphrologie , 44200 Nantes , France
| | - Antoine Bruguière
- EA921 SONAS, SFR4207 QUASAV, UNIV Angers , Université Bretagne Loire , 49035 Angers , France
| | - Pascal Richomme
- EA921 SONAS, SFR4207 QUASAV, UNIV Angers , Université Bretagne Loire , 49035 Angers , France
| | - Béatrice Charreau
- Centre de Recherche en Transplantation et Immunologie (CRTI), UMR1064, INSERM , Université de Nantes , 44093 Nantes , France
- CHU de Nantes, Institut de Transplantation-Urologie-Néphrologie , 44200 Nantes , France
| | - Séverine Derbré
- EA921 SONAS, SFR4207 QUASAV, UNIV Angers , Université Bretagne Loire , 49035 Angers , France
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Effects of alkyl side chains and terminal hydrophilicity on vitamin D receptor (VDR) agonistic activity based on the diphenylpentane skeleton. Bioorg Med Chem Lett 2015; 25:5362-6. [DOI: 10.1016/j.bmcl.2015.09.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/03/2015] [Accepted: 09/12/2015] [Indexed: 01/08/2023]
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Kumari D, Bandyopadhyay P, Suryaprakash N. Discrimination of α-amino acids using green tea flavonoid (-)-epigallocatechin gallate as a chiral solvating agent. J Org Chem 2013; 78:2373-8. [PMID: 23394110 DOI: 10.1021/jo3025016] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We report a special, hitherto-unexplored property of (-)-epigallocatechin gallate (EGCG) as a chiral solvating agent for enantiodiscrimination of α-amino acids in the polar solvent DMSO. This phenomenon has been investigated by (1)H NMR spectroscopy. The mechanism of the interaction property of EGCG with α-amino acids has been understood as arising out of hydrogen-bonded noncovalent interactions, where the -OH groups of two phenyl rings of EGCG play dominant roles. The conversion of the enantiomeric mixture into diastereomers yielded well-resolved peaks for D and L amino acids permitting the precise measurement of enantiomeric composition. Often one encounters complex situations when the spectra are severely overlapped or partially resolved hampering the testing of enantiopurity and the precise measurement of enantiomeric excess (ee). Though higher concentration of EGCG yielded better discrimination, the use of lower concentration being economical, we have exploited an appropriate 2D NMR experiment in overcoming such problems. Thus, in the present study we have successfully demonstrated the utility of the bioflavonoid (-)-EGCG, a natural product as a chiral solvating agent for the discrimination of large number of α-amino acids in a polar solvent DMSO. Another significant advantage of this new chiral sensing agent is that it is a natural product and does not require tedious multistep synthesis unlike many other chiral auxiliaries.
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Affiliation(s)
- Divya Kumari
- NMR Research Centre, Indian Institute of Science, Bangalore 560012, India
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Ichikawa A, Ono H, Mikata Y. Crystal structures of Mosher's salt and ester elucidated by X-ray crystallography. CrystEngComm 2013. [DOI: 10.1039/c3ce41160e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Dong SH, Nikolić D, Simmler C, Qiu F, van Breemen RB, Soejarto DD, Pauli GF, Chen SN. Diarylheptanoids from Dioscorea villosa (Wild Yam). JOURNAL OF NATURAL PRODUCTS 2012; 75:2168-77. [PMID: 23245349 PMCID: PMC3710746 DOI: 10.1021/np300603z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A fractionation methodology aimed at the metabolomic mining of new phytoconstituents for the widely used botanical, wild yam (Dioscorea villosa), makes use of 1D qHNMR and 2D NMR profiles along the preparative fractionation pathway. This quantifiable and structural guidance led to the isolation of 14 diarylheptanoids (1-14), including five new compounds (1-5) with a tetrahydropyrano core skeleton. The structures, including the absolute configurations of both new and previously known diarylheptanoids, were assigned by a combination of HRESIMS, 1D and 2D NMR, (1)H iterative full spin analysis (HiFSA), and Mosher's ester method. The isolation yields were consistent with yields predicted by qHNMR, which confirms the (semi)quantifiable capabilities of NMR-based preparative metabolomic mining. The qHNMR-aided approach enabled the identification of new and potentially significant chemical entities from a small fraction of the plant extract and, thereby, facilitated the characterization of the residual complexity of the D. villosa secondary metabolome. LC-MS profiling of different D. villosa accessions further confirmed that the diarylheptanoids represent genuine secondary metabolites, which can serve as a new class of markers for botanical integrity analysis of D. villosa.
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Affiliation(s)
- Shi-Hui Dong
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Dejan Nikolić
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Charlotte Simmler
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Feng Qiu
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Richard B. van Breemen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Djaja D. Soejarto
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Guido F. Pauli
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Shao-Nong Chen
- UIC/NIH Center for Botanical Dietary Supplements Research, Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
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Salvati M, Cordero FM, Pisaneschi F, Melani F, Gratteri P, Cini N, Bottoncetti A, Brandi A. Synthesis, SAR and in vitro evaluation of new cyclic Arg-Gly-Asp pseudopentapeptides containing a s-cis peptide bond as integrin αvβ3 and αvβ5 ligands. Bioorg Med Chem 2008; 16:4262-71. [DOI: 10.1016/j.bmc.2008.02.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2007] [Revised: 02/19/2008] [Accepted: 02/26/2008] [Indexed: 11/26/2022]
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Kuwahara S, Naito J, Yamamoto Y, Kasai Y, Fujita T, Noro K, Shimanuki K, Akagi M, Watanabe M, Matsumoto T, Watanabe M, Ichikawa A, Harada N. Crystalline-State Conformational Analysis of MαNP Esters, Powerful Resolution and Chiral1H NMR Anisotropy Tools. European J Org Chem 2007. [DOI: 10.1002/ejoc.200601088] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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McConnell O, Bach A, Balibar C, Byrne N, Cai Y, Carter G, Chlenov M, Di L, Fan K, Goljer I, He Y, Herold D, Kagan M, Kerns E, Koehn F, Kraml C, Marathias V, Marquez B, McDonald L, Nogle L, Petucci C, Schlingmann G, Tawa G, Tischler M, Williamson RT, Sutherland A, Watts W, Young M, Zhang MY, Zhang Y, Zhou D, Ho D. Enantiomeric separation and determination of absolute stereochemistry of asymmetric molecules in drug discovery—Building chiral technology toolboxes. Chirality 2007; 19:658-82. [PMID: 17390370 DOI: 10.1002/chir.20399] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The application of Chiral Technology, or the (extensive) use of techniques or tools for the determination of absolute stereochemistry and the enantiomeric or chiral separation of racemic small molecule potential lead compounds, has been critical to successfully discovering and developing chiral drugs in the pharmaceutical industry. This has been due to the rapid increase over the past 10-15 years in potential drug candidates containing one or more asymmetric centers. Based on the experiences of one pharmaceutical company, a summary of the establishment of a Chiral Technology toolbox, including the implementation of known tools as well as the design, development, and implementation of new Chiral Technology tools, is provided.
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Affiliation(s)
- Oliver McConnell
- Wyeth Research, Chemical and Screening Sciences, Collegeville, PA 19426, USA.
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Brandi A, Pisaneschi F, Gensini M, Salvati M, M. Cordero F. 1,3-Dipolar Cycloadditions of 2-tert-Butoxycarbonyl-1-pyrroline N-Oxide with Chiral Acrylates and Acrylamides. HETEROCYCLES 2006. [DOI: 10.3987/com-05-s(t)37] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Salvati M, Cordero FM, Pisaneschi F, Bucelli F, Brandi A. New developments in the synthesis of pyrrolizidinone-based dipeptide isosteres. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Siegrist R, Baumgartner C, Seiler P, Diederich F. Facile Synthesis of Diastereoisomerically and Optically Pure 2-Substituted Hexahydro-1H-pyrrolizin-3-ones. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590158] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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