New Bioactive Rosigenin Analogues and Aromatic Polyketide Metabolites from the Freshwater Aquatic Fungus Massarina tunicata
摘要:
Four new rosigenin analogues (massarigenins A-D; 1-4) and two new aromatic polyketide-derived secondary metabolites (massarinins A and B; 6, 7) and have been isolated from the freshwater aquatic fungus Massarina tunicata. The structures of these compounds were determined primarily by analysis of NMR data, and that of compound 1 was verified by X-ray crystallography. The known compound 4-(2-hydroxybutynoxy)benzoic acid (11) was also obtained, and its absolute stereochemistry was assigned. Several of these metabolites showed antibiotic activity against Gram-positive bacteria.
The antipode of the structure proposed for the natural product penipratynolene in the literature was synthesized in high enantiopurity via an chiron approach and fully characterized. However, substantial differences were observed between the physical and spectroscopic data of the synthetic sample and those reported for the natural penipratynolene. Possible causes for the discrepancies are proposed on the basis of acquisition and comparison of additional data. The present work also provides the only piece of synthetic evidence for ail antifungal natural product WA, the corresponding acid of the antipode of natural penipratynolene. (C) 2009 Elsevier Ltd. All rights reserved.
The antipode of the structure proposed for the natural product penipratynolene in the literature was synthesized in high enantiopurity via an chiron approach and fully characterized. However, substantial differences were observed between the physical and spectroscopic data of the synthetic sample and those reported for the natural penipratynolene. Possible causes for the discrepancies are proposed on the basis of acquisition and comparison of additional data. The present work also provides the only piece of synthetic evidence for ail antifungal natural product WA, the corresponding acid of the antipode of natural penipratynolene. (C) 2009 Elsevier Ltd. All rights reserved.
New Bioactive Rosigenin Analogues and Aromatic Polyketide Metabolites from the Freshwater Aquatic Fungus <i>Massarina </i><i>t</i><i>unicata</i>
作者:Hyuncheol Oh、Dale C. Swenson、James B. Gloer、Carol A. Shearer
DOI:10.1021/np020342d
日期:2003.1.1
Four new rosigenin analogues (massarigenins A-D; 1-4) and two new aromatic polyketide-derived secondary metabolites (massarinins A and B; 6, 7) and have been isolated from the freshwater aquatic fungus Massarina tunicata. The structures of these compounds were determined primarily by analysis of NMR data, and that of compound 1 was verified by X-ray crystallography. The known compound 4-(2-hydroxybutynoxy)benzoic acid (11) was also obtained, and its absolute stereochemistry was assigned. Several of these metabolites showed antibiotic activity against Gram-positive bacteria.