Search results for "Sesquiterpenoid"

showing 3 items of 3 documents

The metabolites of the genus onopordum (asteraceae): Chemistry and biological properties

2011

Onopordum is an interesting genus belonging to the tribe Cardueae (Asteraceae family), and the species of this genus are used as food and in the popular medicine of several countries. The present paper reviews all the metabolites present in all the species of this genus, reported up to 2009, and several chemotaxonomic consideration have been made. Furthermore, the occurrence in other genus, the spectral data, the synthetic approaches, the chemical modifications and the biological properties of the sesquiterpenes of genus Onopor- dum have been reviewed.

13C NMRbiologyOnopordumBiological activitySesquiterpenoidOrganic ChemistryZoologySettore CHIM/06 - Chimica OrganicaAsteraceaebiology.organism_classificationTribe (biology)Steroids and triterrpeneSynthesisGenusBiological propertyBotanyFlavonoidChemcial modificationSpectral data
researchProduct

Lipase-catalysed preparation of acyl derivatives of the germacranolide cnicin

2009

Several acyl derivatives of cnicin were obtained through lipase-catalysed acylation and alcoholysis reactions. In most reactions lipases showed a regioselective behaviour affording only one product. Longer chain acyl derivatives were prepared at lower temperature than the used in lipase-catalysed reactions, to preclude side products formation. The enzymatic approach let to prepare a family of novel acetyl and fatty acid derivatives of cnicin which are not obtainable following traditional organic synthetic procedures. Fil: Monsalve, Leandro Nicolas. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad de Microanálisis…

GermacranolideTriacylglycerol lipaseBioengineeringBiochemistryCnicinCatalysisEnzyme catalysisAcylationchemistry.chemical_compoundOrganic chemistryLipasechemistry.chemical_classificationbiologyENZYME CATALYSISChemistryProcess Chemistry and TechnologyCiencias QuímicasRegioselectivityALCOHOLYSISCNICINACYLATIONSESQUITERPENOIDSEnzymeQuímica Orgánicabiology.proteinCIENCIAS NATURALES Y EXACTAS
researchProduct

Lipase-catalysed preparation of acyl derivatives of the germacranolide sesquiterpenoid cnicin

2009

Several acyl derivatives of cnicin were obtained through lipase-catalysed acylation and alcoholysis reactions. In most reactions lipases showed a regioselective behaviour affording only one product. Longer chain acyl derivatives were prepared at lower temperature than the used in lipase-catalysed reactions, to preclude side products formation. The enzymatic approach let to prepare a family of novel acetyl and fatty acid derivatives of cnicin which are not obtainable following traditional organic synthetic procedures.

enzyme catalysis acylation alcoholysis sesquiterpenoids cnicinSettore CHIM/06 - Chimica Organica
researchProduct