Zeitschrift für Naturforschung C · 2005 · 43 citations · 0 references
Life SciencesBiochemistryMicrobiologyBioorganic ChemistryMycologyPlant BiochemistryFungal BiochemistryFungal MetabolismFungal Natural Product BiosynthesisFungal Secondary MetabolitesMetabolite IdentificationMicrobial Metabolite ProductionBioactive Fungal MetabolitesBiological Activity FeaturesFungal Bioactive CompoundsFungal Metabolite BiosynthesisMetabolites Of Biocontrol FungiMolecular Structure DeterminationPlant-associated Fungal MetabolitesStructure Elucidation Of Fungal Metabolites
The isolation, structure determination, syntheses and biological activity of Nb-acetyltryptamine and three proline containing dioxopiperazines, cyclo(S-Pro-S-Leu) (2), cyclo(S-Pro-S-Ile) (3), and cyclo(S-Pro-S-Val) (4), from cultures of Rhizoctonia solani Kuhn are reported here for the first time. Despite the small amounts isolated, the absolute stereochemistry of these naturally occurring dioxopiperazines was established by 1H NMR using for the first time the chiral solvating agent (R)-(-)-2,2,2-trifluoro-1-(9-anthryl)ethanol.