Fernando Gomes Silva - Academia.edu (original) (raw)
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Papers by Fernando Gomes Silva
Química Nova, 2001
SUCROSE IN UNDERGRADUATE ORGANIC CHEMISTRY LABORATORY. An experiment showing the readily availabl... more SUCROSE IN UNDERGRADUATE ORGANIC CHEMISTRY LABORATORY. An experiment showing the readily available disaccharide (sucrose) as reagent for experiments in undergraduate chemistry laboratory is described. The preparation of 2, 3: 4, 5-di-O-...
Quimica Nova, 2010
The chemical investigation of Salacia elliptica allowed to the isolation of 20 constituents: two ... more The chemical investigation of Salacia elliptica allowed to the isolation of 20 constituents: two polyols, one xanthone, a mixture of long chain hydrocarbons, one carboxylic acid, one polymer, two steroidal compounds, one aromatic ester and eleven pentacyclic triterpenes. These triterpenes include 3β-stearyloxy-oleanane, 3β-stearyloxy-ursane, one seco-friedelane, and eight compounds of the friedelane serie. The chemical structure and the relative configuration of a new triterpene 1,3-dioxo-16α-hydroxyfriedelane (15) were established through 1 H and 13 C NMR including 2D experiments (HMBC, HMQC, COSY and NOESY) and herein reported for the first time.
Química Nova, 2001
SUCROSE IN UNDERGRADUATE ORGANIC CHEMISTRY LABORATORY. An experiment showing the readily availabl... more SUCROSE IN UNDERGRADUATE ORGANIC CHEMISTRY LABORATORY. An experiment showing the readily available disaccharide (sucrose) as reagent for experiments in undergraduate chemistry laboratory is described. The preparation of 2, 3: 4, 5-di-O-...
Quimica Nova, 2010
The chemical investigation of Salacia elliptica allowed to the isolation of 20 constituents: two ... more The chemical investigation of Salacia elliptica allowed to the isolation of 20 constituents: two polyols, one xanthone, a mixture of long chain hydrocarbons, one carboxylic acid, one polymer, two steroidal compounds, one aromatic ester and eleven pentacyclic triterpenes. These triterpenes include 3β-stearyloxy-oleanane, 3β-stearyloxy-ursane, one seco-friedelane, and eight compounds of the friedelane serie. The chemical structure and the relative configuration of a new triterpene 1,3-dioxo-16α-hydroxyfriedelane (15) were established through 1 H and 13 C NMR including 2D experiments (HMBC, HMQC, COSY and NOESY) and herein reported for the first time.