  Convergences chimiques entre les poisons de flèches d'Amérique Latine et ceux d'Afrique Noire; Angenot, Luc  in Hommage au Professeur Louis REVOL (1976) Detailed reference viewed: 21 (1 ULg)A propos des transformations de la strychnine et (à propos des principes actifs) des Strychnos curarisants africainsAngenot, Luc ; ; et alin 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 ▲] Detailed reference viewed: 28 (3 ULg)Plantes médicinales cultivées à l'Abbaye d'Orval; ; Angenot, Luc 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 ▲] Detailed reference viewed: 120 (2 ULg)Découvertes récentes dans la chimie des alcaloïdes du Strychnos usambarensis GILGAngenot, Luc ; 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 ▲] Detailed reference viewed: 35 (1 ULg)Alcaloïdes des Loganiacées: sur l'isolement d'un nouvel alcaloïde à partir du Strychnos usambarensisAngenot, Luc ; 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 ▲] Detailed reference viewed: 13 (2 ULg)Alcaloïdes des Loganiacées: sur l'isolement de l'harmane à partir du Strychnos usambarensisAngenot, Luc ; ; 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. Detailed reference viewed: 14 (0 ULg)Contribution à l'étude des alcaloïdes du Strychnos usambarensisAngenot, Luc ; 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 ▲] Detailed reference viewed: 5 (1 ULg)Activité curarisante d'un Strychnos africain: le Strychnos usambarensis Gilg du RwandaAngenot, Luc ; ; 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. Detailed reference viewed: 23 (4 ULg) |
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