Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Raymond Brouillard"'
Four-Step Route to Novel Bisflavylium Dications - First Synthesis of Phloroglucinol-Type Derivatives
Publikováno v:
Synlett. 23:2053-2058
Various bisflavylium dications have been prepared in an efficient four-step manner utilizing the acid-mediated condensation between bis(arylethynylketones) and activated phenols as the key step. Of special note is that phloroglucinol-type bisflavyliu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be388099195f6296e5208a66e5118e87
https://doi.org/10.1055/s-0032-1316681
https://doi.org/10.1055/s-0032-1316681
Autor:
Alexandre Specht, Raymond Brouillard, Marie Kueny-Stotz, Junichi Nabekura, Stefan Chassaing, Maurice Goeldner, Akiko Miyamoto, Mogens Nielsen, Adeline Martz, Lia Prado de Carvalho, Thomas Grutter, Hitoshi Ishibashi, Ruotian Jiang
Publikováno v:
British Journal of Pharmacology. 162:1326-1339
BACKGROUND AND PURPOSE Flavonoids, important plant pigments, have been shown to allosterically modulate brain GABAA receptors (GABAARs). We previously reported that trans-6,4′-dimethoxyretrochalcone (Rc-OMe), a hydrolytic derivative of the correspo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fcd16c889aeb9322544ddbba24f010f
https://doi.org/10.1111/j.1476-5381.2010.01142.x
https://doi.org/10.1111/j.1476-5381.2010.01142.x
Publikováno v:
Tetrahedron Letters. 49:6999-7004
The reaction of 5-hydroxy-4-methylflavylium salts with aldehydes, furnishing color-stable pyranoflavylium pigments, has been investigated in terms of scope and limitations. An unexpected chemical reactivity was observed and the origin of this reactiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc9f2f10df03ec0ab7651fccb2b6af9c
https://doi.org/10.1016/j.tetlet.2008.09.139
https://doi.org/10.1016/j.tetlet.2008.09.139
Publikováno v:
Tetrahedron
Tetrahedron, Elsevier, 2015, 71 (20), pp.3066-3078. ⟨10.1016/j.tet.2014.10.058⟩
Tetrahedron, Elsevier, 2015, 71 (20), pp.3066-3078. ⟨10.1016/j.tet.2014.10.058⟩
Two flavylium-based chromophores peculiar to aged red wine pigments are investigated from a synthetic viewpoint. The condensation between easy-to-prepare 5-hydroxy-4-methylflavylium salts and aldehydes, giving birth to color-stable pyranoflavylium pi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93c3fac0eef0318c87773744051f7d63
https://hal.archives-ouvertes.fr/hal-02062175
https://hal.archives-ouvertes.fr/hal-02062175
Publikováno v:
BioFactors. 27:37-46
(Z)-3,5,4'-Trimethoxystilbene is a natural polyphenol present in five different plants, Virola cuspidata, Virola elongata, Centipeda minima, Schoenus nigricans and Rheum undulatum. This molecule was prepared in a three-step sequence in good overall y
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2304a08a9fcd8d509c867b8b89914c22
https://doi.org/10.1002/biof.5520270104
https://doi.org/10.1002/biof.5520270104
Publikováno v:
Canadian Journal of Chemistry. 79:1173-1178
Flavylium salts substituted at the 4-position have been prepared according to a Grignard reaction of some flavones with appropriate alkyl- and aryl-magnesium bromides. Among these compounds, 4-methyl flavylium salts were gently reacted with aromatic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccfb98025ceb49104383599914ac6bf8
https://doi.org/10.1139/v01-089
https://doi.org/10.1139/v01-089
Publikováno v:
The Journal of Organic Chemistry. 65:583-586
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77bd1ee1477c09cf9f6f579bca21e752
https://doi.org/10.1021/jo990735q
https://doi.org/10.1021/jo990735q
Autor:
Fumi Tatsuzawa, Norio Saito, Raymond Brouillard, Florian George, Kenjiro Toki, Paulo Figueiredo
Publikováno v:
Phytochemistry. 51:125-132
Three series of structurally related anthocyanins, extracted from the red–purpleflowers of Dendrobium Pramot, xLaeliocattleya cv. Mini Purple, Bletilla striata and Phalaenopsis all belonging to the Orchidaceae family and another series extracted fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c0a235bf4fd01738fa2d31caac307eb
https://doi.org/10.1016/s0031-9422(98)00685-2
https://doi.org/10.1016/s0031-9422(98)00685-2
Publikováno v:
Chemical Physics Letters. 298:189-195
Excited state proton transfer from 7-hydroxy-4-methylflavylium chloride to water is reported. From a modified analysis of picosecond time-resolved fluorescence data (not using the lifetime of a parent compound), all rate constants were determined: th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d07f2625517adff7e14e6523c8e2e0e
https://doi.org/10.1016/s0009-2614(98)01199-3
https://doi.org/10.1016/s0009-2614(98)01199-3
Publikováno v:
Helvetica Chimica Acta. 80:398-413
This work describes a straightforward synthesis of two 3’-(,fl-~-glycopyranosyloxy)flavylium ions thought to be good models of natural anthocyanins (pigments). For both pigments and for the non-glycosylated flavylium ion taken as a reference, H,O a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee1ee4a7343802abfa8b014ba8f4ab5
https://doi.org/10.1002/hlca.19970800206
https://doi.org/10.1002/hlca.19970800206