Pseudoguanolide sesquiterpene lactones from Veroniopsis caudata and their in vitro antiplasmodial activities

Autor: David Ramanitrahasimbola, Medhi Labaïed, Philippe Rasoanaivo, Voahangy Ramanandraibe, Lengo Mambu, Francois Frappier, Marie-Thérèse Martin, Philippe Grellier, Dina L Rakotondramanana

Publikováno v: Journal of Natural Products
Journal of Natural Products, American Chemical Society, 2005, 68, pp.800-803. ⟨10.1021/np0401866⟩
Journal of Natural Products, American Chemical Society, 2005, 68 (5), pp.800-3. ⟨10.1021/np0401866⟩

Two new helenanolide sesquiterpene lactones, 1 and 2, as well as one known related structure, 11α,13-dihydrohelenalin-[2-(1-hydroxyethyl)acrylate] (3), together with 4′-β-D-O-glucopyranosyl-luteolin and ethyl 2,5-dihydroxycinnamate were isolated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02089c60b5f84f300bf39fbfbb1756b5
https://hal.archives-ouvertes.fr/hal-00086261

On the mechanism of the conversion of dethiobiotin to biotin in E. coli. Studies with deuterated precursors using tandem mass spectroscopic (MS-MS) techniques

Autor: Francois Frappier, Alain Olesker, Andrée Marquet, Jean-Claude Tabet, Marc Jouany

Publikováno v: The Journal of Organic Chemistry. 47:2257-2261

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e9b6e34216bf63bb586880e214e21f6
https://doi.org/10.1021/jo00133a004

On the mechanism of conversion of dethiobiotin to biotin in Escherichia coli. III isolation of an intermediate in the biosynthesis of biotin from dethiobiotin (1,2)

Autor: Georges Guillerm, Adel Guirguis Salib, Andrée Marquet, Francois Frappier

Publikováno v: Biochemical and Biophysical Research Communications. 88:312-319

An intermediate in the biosynthetic pathway between dethiobiotin and biotin has been isolated for the first time, from the incubation medium of resting cells of E. Coli C124 (bio A − , His − ) with ∥ 3 H∥ or/and ∥ 14 C∥ dethiotiotin. This

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7cc200df788117166e80084cae02e392
https://doi.org/10.1016/0006-291x(79)91731-5

Alcaloides steroidiques CXXIV (11) - isomerisation spinale des amino-steroides VIII. Isomerisation de la methylamino-3α androstene-5 one-17 et du methylamino-3α conanene-5 dans l'acide sulfurique

Autor: Francois Frappier, Josiane Thierry, F.-X. Jarreau

Publikováno v: Tetrahedron Letters. 12:1887-1890

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::59376edfa5d582f7d7c8e2bd5a258677
https://doi.org/10.1016/s0040-4039(01)96735-8

Mechanism of the backbone rearrangement of amino steroids. A carbon-13 and tritium nuclear magnetic resonance spectroscopic study of isoconessine, neoconessine and the corresponding polydeuterated and polytritiated species

Autor: Francois Frappier, Jean Pierre Beaucourt, Marcel Audinot, Leila Sergent, Gabor Lukacs

Publikováno v: The Journal of Organic Chemistry. 47:3783-3785

Carbon-13 and tritium NMR spectroscopic data explaining the mechanism of the backbone rearrangement of some steroids, conessine into isoconessine and into neoconessine are reported. Treatment of conessine with D/sub 2/SO/sub 4/ or THSO/sub 4/ at O/su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7bb892c8910431e477f2a5aa7203134f
https://doi.org/10.1021/jo00140a045