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Stereochemistry of Complex Marine Natural Products by Quantum Mechanical Calculations of NMR Chemical Shifts: Solvent and Conformational Effects on Okadaic Acid

AuthorsDomínguez, Humberto J.; Crespín, Guillermo D.; Santiago-Benítez, Adrián J.; Gavín, José A.; Norte, Manuel; Fernandez, Jose J.; Hernández Daranas, Antonio
KeywordsQuantum mechanical calculations
Nuclear magnetic resonance
Chemical shifts
Marine toxin
Structure determination
Issue Date7-Jan-2014
PublisherMolecular Diversity Preservation International
CitationMarine Drugs 12(1): 176-192 (2014)
AbstractMarine organisms are an increasingly important source of novel metabolites, some of which have already inspired or become new drugs. In addition, many of these molecules show a high degree of novelty from a structural and/or pharmacological point of view. Structure determination is generally achieved by the use of a variety of spectroscopic methods, among which NMR (nuclear magnetic resonance) plays a major role and determination of the stereochemical relationships within every new molecule is generally the most challenging part in structural determination. In this communication, we have chosen okadaic acid as a model compound to perform a computational chemistry study to predict 1H and 13C NMR chemical shifts. The effect of two different solvents and conformation on the ability of DFT (density functional theory) calculations to predict the correct stereoisomer has been studied
Publisher version (URL)https://doi.org/10.3390/md12010176
Appears in Collections:(IPNA) Artículos
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