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L Previtera

Publications and source records attributed to L Previtera.

10 recordsLinked to original sources
PubMed1994

Cycloartane glucosides from Juncus effusus.

Five new cycloartane glucosides, juncosides I-V, have been isolated from Juncus effusus. The structures have been determined on the basis of chemical and spectroscopic studies.

Carbohydrate Sequence↗
PubMed1994

Oleanane glycosides from Hydrocotyle ranunculoides.

Six new oleanane glycosides, ranuncosides I-VI, have been isolated from Hydrocotyle ranunculoides. Their structures have been determined on the basis of chemical and spectroscopic studies.

Carbohydrate Sequence↗
PubMed1994

Progesterone bioconversion by microalgal cultures.

Ten different strains of unicellular microalgae have been used in the bioconversion of progesterone. Regio and stereoselective reduction and hydroxylation of the title compound were induced. A 9,10-seco derivative was obtained in high yield by using Scenedesmus quadricauda.

Biotransformation↗
PubMed1975

New synthetic routes to 2alpha,3beta-dihydroxy-5alpha-cholestane.

Better synthetic approaches to 2alpha,3beta-dihydroxy-5alpha-cholestane and its ester derivatives, which were hitherto difficult to prepare, are reported. A satisfactory preparation of the desired trans-diequatorial 2alpha,3beta-dibenzoate, starting from the easily available corresponding cis 2alpha,3alpha-diol, has been devised. Finally, the influence of the temperature as well as of the bulkiness of the silver carboxylate on the steric course of the Prevost reaction have also been examined.

Aluminum↗