References of "Denoël, Albert"
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See detailConvergences chimiques entre les poisons de flèches d'Amérique Latine et ceux d'Afrique Noire
Denoël, Albert; Angenot, Luc ULg

in Hommage au Professeur Louis REVOL (1976)

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See detailA propos des transformations de la strychnine et (à propos des principes actifs) des Strychnos curarisants africains
Angenot, Luc ULg; Bisset, Norman; Denoël, Albert et al

in Journal de Pharmacie de Belgique (1976), 31(5), 509-510

Strychnine is unstable under light in chloroformic solution and is partly transformed in pseudostrychnine, genostrychnine (Nb-oxy-strychnine) and chloromethostrychninium (a quaternary derivative). In ... [more ▼]

Strychnine is unstable under light in chloroformic solution and is partly transformed in pseudostrychnine, genostrychnine (Nb-oxy-strychnine) and chloromethostrychninium (a quaternary derivative). In other respects the curarizing activity of African Strychnos (e.g. Strychnos usambarensis) is not due to isostrychnine as erroneously written by TURKOVIC (J.Pharm Belg. 1976, 31, 277-286) but to quaternary alkaloids like C-dihydrotoxiferine, C-curarine, afrocurarine and C-calebassine (cf L.ANGENOT et al. Arch. Intern. Pharmacodyn. Ther. 1975, 215, 246-258). [less ▲]

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See detailPlantes médicinales cultivées à l'Abbaye d'Orval
Denoël, Albert; Coune, Claude; Angenot, Luc ULg

in Jardin des Plantes Médicinales - Abbaye d'Orval (1975)

L'ouvrage commente les 88 plantes cultivées dans le jardin médicinal de l'abbaye d'Orval en 1975. il comprend également des monographies détaillées et illustrées sur les plantes suivantes: Angélique ... [more ▼]

L'ouvrage commente les 88 plantes cultivées dans le jardin médicinal de l'abbaye d'Orval en 1975. il comprend également des monographies détaillées et illustrées sur les plantes suivantes: Angélique, Aunée, Bardane, Belladone, Bourdaine, Chélidoine, Consoude, Digitale, Fougère Mâle, Guimauve, Hysope, Lavande, Mauve, Mélisse, Menthe poivrée, Origan, Prêle des champs, Primevère, Raifort, Reine des Prés, Romarin, Sauge, Serpolet, Valériane.Un glossaire des termes botaniques, des directives pour la récolte et l'emploi des plantes médicinales sont également présentées ainsi qu'une liste de références bibliographiques. [less ▲]

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See detailDécouvertes récentes dans la chimie des alcaloïdes du Strychnos usambarensis GILG
Angenot, Luc ULg; Denoël, Albert

in Plantes médicinales et phytothérapie (1973), 7(4), 284-292

Six bis-indole alkaloids have been isolated from the rootbark of Strychnos usambarensis.Four alkaloids ( usambarensine and derivatives) are unsymmetrical bis-indole products, biogenetically derived from ... [more ▼]

Six bis-indole alkaloids have been isolated from the rootbark of Strychnos usambarensis.Four alkaloids ( usambarensine and derivatives) are unsymmetrical bis-indole products, biogenetically derived from two tryptaminic and one monoterpene units as some alkaloids of Apocynaceae (Ochrosia) and Rubiaceae ( Uncaria), two families very close to Loganiaceae from a chemotaxonomy point of view. Two other alkaloids (C-dihydrotoxiferine and C_Curarine) are symmetrical bis-indole quaternary products. These potent compounds were previously isolated from calabash-curare and some American Strychnos. Furthermore, we have isolated loganic acid and discussed the part that it could take in the biogenesis of various alkaloids. [less ▲]

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See detailAlcaloïdes des Loganiacées: sur l'isolement d'un nouvel alcaloïde à partir du Strychnos usambarensis
Angenot, Luc ULg; Denoël, Albert

in Planta Medica (1973), 23(3), 226-232

Tha authors have isolated a new anhydronium base from Strychnos usambarensis. Its structure was elucidated thanks to the spectral data (UV,IR, MS and comparison with a synthetic product). Indeed the ... [more ▼]

Tha authors have isolated a new anhydronium base from Strychnos usambarensis. Its structure was elucidated thanks to the spectral data (UV,IR, MS and comparison with a synthetic product). Indeed the synthesis of the product was realized before the isolation from a plant ! Anhydronium bases are rare in Nature. [less ▲]

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See detailAlcaloïdes des Loganiacées: sur l'isolement de l'harmane à partir du Strychnos usambarensis
Angenot, Luc ULg; Bisset, Norman; Denoël, Albert

in Plantes Médicinales et Phytothérapie (1973), 7(1), 33-36

Harman has been isolated for the first time from a species of the Family of Loganiaceae. MS data are provided as well as the list of plants where this product has een previously detected.

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See detailContribution à l'étude des alcaloïdes du Strychnos usambarensis
Angenot, Luc ULg; Denoël, Albert

in Planta Medica (1972), 21(1), 96-110

Strychnos usambarensis is concerned with the preparation of an arrow poison used in Africa for hunting. By chromatography combined to a new process of extraction using freeze-drying to avoid the ... [more ▼]

Strychnos usambarensis is concerned with the preparation of an arrow poison used in Africa for hunting. By chromatography combined to a new process of extraction using freeze-drying to avoid the degradation of some unstable alkaloids in usual industrial solvents ( chloroform, diethylether), we have isolated four new alkaloids (usambarensine and derivatives) from the rootbark of S. usambarensis. These alkaloids have structures very close to some found in Apocynaceae and Rubiaceae. [less ▲]

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See detailActivité curarisante d'un Strychnos africain: le Strychnos usambarensis Gilg du Rwanda
Angenot, Luc ULg; Denoël, Albert; Goffart, Michel

in Journal de Pharmacie de Belgique (1970), 25(1), 73-77

The quaternary alkaloid fractions of the strychnos usambarensis root extract showed curarizing activity in frog and rat in vitro and in vivo.

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