References of "Tavernier, Dirk"
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See detailStrychnochromine, an unusual C18 indoline alkaloid from Strychnos gossweileri
Angenot, Luc ULg; Coune, Claude; Quetin-Leclercq, Joëlle et al

in Phytochemistry (1988), 27(2), 595-597

Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible to propose a plane structure and the relative configuration of strychnochromine a dextrorotatory ... [more ▼]

Through a combination of spectroscopic techniques (UV, IR, MS, 1H and 13C NMR) it has been possible to propose a plane structure and the relative configuration of strychnochromine a dextrorotatory alkaloid isolated from the root bark of Strychnos gossweileri. [less ▲]

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See detailThe structure of isostrychnopentamine, a bisindole monoterpene alkaloid from Strychnos usambarensis
Tavernier, Dirk; Zhang, Weiguo; Angenot, Luc ULg et al

in Phytochemistry (1987), 26(2), 557-560

The alkaloid isostrychnopentamine has been shown to be epimeric with strychnopentamine at the asymmetric carbon atom of the N-methylpyrrolidin-2-yl group. Its IUPAC name is also given.

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See detailStrychnozairine, an indole alkaloid from Strychnos variabilis
Tits, Monique ULg; Tavernier, Dirk; Angenot, Luc ULg

in Phytochemistry (1985), 34(1), 205-207

Through a combination of spectroscopic techniques (UV,CD,IR,MS and NMR) it has been possible to show that strychnozairine, an alkaloid isolated from the root bark of Strychnos variabilis, is N&-acetyl-16 ... [more ▼]

Through a combination of spectroscopic techniques (UV,CD,IR,MS and NMR) it has been possible to show that strychnozairine, an alkaloid isolated from the root bark of Strychnos variabilis, is N&-acetyl-16-R-formyl-19-oxo-20,21-didehydrostrychnane. [less ▲]

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See detailThe structure of strychnozairine, a new indole alkaloid from Strychnos variabilis
Tits, Monique ULg; Tavernier, Dirk; Angenot, Luc ULg

Poster (1984, July)

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See detail12'-Hydroxystrychnobiline, nouvel alcaloïde bisindolinique du Strychnos variabilis
Tits, Monique ULg; Angenot, Luc ULg; Tavernier, Dirk

in Journal of Natural Products (1983), 46(5), 638-645

12'-hydroxystrychnobiline, a new unsymmetrical bisindole alkaloid, was isolated from the root barks of Strychnos variabilis. Its structure was established by acid hydrolysis and by spectral analysis ... [more ▼]

12'-hydroxystrychnobiline, a new unsymmetrical bisindole alkaloid, was isolated from the root barks of Strychnos variabilis. Its structure was established by acid hydrolysis and by spectral analysis, especially by 1H-nmr at 360MHz. We compare its absolute stereochemistry with that of other alkaloids that contain an oxazine ring. [less ▲]

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See detailDidéhydro-16,17 isostrychnobiline, nouvel alcaloÏde bisindolinique asymétrique du Strychnos variabilis
Tits, Monique ULg; Angenot, Luc ULg; Tavernier, Dirk

in Journal de Pharmacie de Belgique (1983), 38(5), 241-245

We describe a new asymmetrical bisindole alkaloid, 16,17-didehydroisostrychnobiline, that was isolated by reverse phase liquid chromatography from the root barks of Strychnos variabilis. Its structure was ... [more ▼]

We describe a new asymmetrical bisindole alkaloid, 16,17-didehydroisostrychnobiline, that was isolated by reverse phase liquid chromatography from the root barks of Strychnos variabilis. Its structure was elucidated from spectral analysis and by acid hydrolysis. Its stereochemistry was established by 300 MHz 1H NMR spectroscopy [less ▲]

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See detailDeux nouveaux alcaloïdes quaternaires isolés à partir des feuilles du Strychnos usambarensis GILG du Rwanda: Nb-méthyl hydroxy-10 et hydroxy-11 usambarines
Caprasse, Maryse; Tavernier, Dirk; Angenot, Luc ULg

in Journal de Pharmacie de Belgique (1983), 38(4), 211-218

Two new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis leaves. They are phenolic dimers of the "usambarine (usambarane) type" and correspond to the Nb-methyl-derivatives of ... [more ▼]

Two new isomeric bis-indole alkaloids have been isolated from Strychnos usambarensis leaves. They are phenolic dimers of the "usambarine (usambarane) type" and correspond to the Nb-methyl-derivatives of 10- and 11-hydroxy-usambarine. The structure elucidation and the stereochemistry of these molecules are discussed from their spectroscopic properties (UV,IR,MS, CD , NMR). TLC comparison with quaternarized 10- and 11-hydroxy-usambarine provides a corroborative structural proof. The separation of the two alkaloids by "DCCC" (Droplet Counter current Chromatography) gives a new example of the application of this suitable technique for the separation of polar coumpounds that it is always very difficult to purify and separate. [less ▲]

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See detailAlcaloïdes indoliniques du Strychnos variabilis
Tits, Monique ULg; Tavernier, Dirk; Angenot, Luc ULg

in Phytochemistry (1980), 19(7), 1531-1534

Three new indolinic alkaloids have been isolated from the root bark of Strychnos variabilis: strychnopivotine, unusual because the C17 atom of the curane skeleton is lacking, 16-hydroxyisoretulinal and ... [more ▼]

Three new indolinic alkaloids have been isolated from the root bark of Strychnos variabilis: strychnopivotine, unusual because the C17 atom of the curane skeleton is lacking, 16-hydroxyisoretulinal and rosibiline, a derivative of N-desacetylretuline. Their structures were deduced from spectral data and that of rosibiline was confirmed chemically. [less ▲]

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See detailNew indole aldehydic alkaloids of Strychnos variabilis
Tits, Monique ULg; Angenot, Luc ULg; Tavernier, Dirk

in Tetrahedron Letters (1980), 21

Two isomeric pairs of novel indoline aldehydic alkaloids have been isolated from the root barks of Strychnos variabillis. The isomerism finds its origin in the facile isomerisation of C16 and is set up ... [more ▼]

Two isomeric pairs of novel indoline aldehydic alkaloids have been isolated from the root barks of Strychnos variabillis. The isomerism finds its origin in the facile isomerisation of C16 and is set up rapidly at room temperature. So, they could be the biogenetic starting point of two series of alkaloids which have a different stereochemistry for C16: the "retuline" series and the epimer "isoretuline" series. [less ▲]

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