Zobrazeno 1 - 10
of 121
pro vyhledávání: '"REX T. WEAVERS"'
Autor:
JOHN W. VAN KLINK, ERNST P. ELLMERER, HERMAN STUPPNER, REX T. WEAVERS, SILJA HORAK, CHRISTIAN ZIDORN
Publikováno v:
Journal of the Serbian Chemical Society, Vol 71, Iss 2, Pp 121-125 (2006)
An ethanolic extract of Pseudopanax simplex yielded kaempferol-3,7-di-O-rhamnopyranoside, chlorogenic acid, maltol glucoside, ent-kaur-16-en-18-acid, and 4R,5S,9R,10S,13S-ent-pimara-7,15-dien-19-oic acid. Full NMR data for the last compound are repor
Externí odkaz:
https://doaj.org/article/3fba0cd0133744859e54c00b245a61a1
Publikováno v:
Tetrahedron. 67:718-726
The reaction of 5,7-dimethoxyflavone with dimethyldioxirane (DMDO) gives the 2,3-epoxide rapidly at first. However, low levels of ring A hydroxylated by-products are also formed. With increasing proportions of DMDO, demethylation at C-5 becomes appar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1636414383ba897828ca10057269f12
https://doi.org/10.1016/j.tet.2010.11.076
https://doi.org/10.1016/j.tet.2010.11.076
Publikováno v:
Synthetic Communications. 39:2935-2948
The 8-iodo flavones formed by cyclization of benzyl-protected chalcones with iodine in dimethyl sulfoxide have been transformed by a Suzuki coupling reaction into a variety of 8-aryl derivatives. Deprotection with boron tribromide has generated a fam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c339e42f8558b577a2a5b64034b3679c
https://doi.org/10.1080/00397910802710682
https://doi.org/10.1080/00397910802710682
Autor:
Silja B Horak, John W. van Klink, Hermann Stuppner, Christian Zidorn, Ernst P. Ellmerer, Rex T. Weavers
Publikováno v:
Journal of the Serbian Chemical Society, Vol 71, Iss 2, Pp 121-125 (2006)
An ethanolic extract of Pseudopanax simplex yielded kaempferol-3,7-di-O-rhamnopyranoside, chlorogenic acid, maltol glucoside, ent-kaur-16-en-18-oic acid, and 4R,5S,9R,10S,13S-ent-pimara-7,15-dien-19-oic acid. Full NMRdata for the last compound are re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e83ee0ab0070a39f265a00f5b4991a6
https://doi.org/10.2298/jsc0602121z
https://doi.org/10.2298/jsc0602121z
Autor:
John W. van Klink, Birgitte Andersen, Thomas Ostenfeld Larsen, Kathrine Bisgaard Christensen, Rex T. Weavers, Richard Kerry Phipps
Publikováno v:
Journal of Agricultural and Food Chemistry. 53:9431-9435
Two new structurally related metabolites, novae-zelandin A (1) and novae-zelandin B (2), as well as the novel metabolite 4Z-infectopyrone (3) were purified from extracts of filamentous fungi belonging to the Alternaria infectoria species-group. The s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2a0c4d759e2d8c03cb77d0a93e2e7b1
https://doi.org/10.1021/jf0513213
https://doi.org/10.1021/jf0513213
Publikováno v:
Biochemical Systematics and Ecology. 33:1049-1059
Five unusual C-methylflavonoids lacking B-ring oxygenation (2′,4′-dihydroxy-3′,5′-dimethyl-6′-methoxychalcone, 2′,4′-dihydroxy-3′-methyl-6′-methoxychalcone, 2′,6′-dihydroxy-3′-methyl-4′-methoxychalcone, 2′-hydroxy-3′-met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e2e4dfc365ae13fb7839f9ca2401ee2c
https://doi.org/10.1016/j.bse.2005.02.003
https://doi.org/10.1016/j.bse.2005.02.003
Autor:
Stephen D. Lorimer, Rex T. Weavers, Benjamin J. Compton, Anna J. Barlow, Ursula Maria Hertewich
Publikováno v:
Journal of Natural Products. 68:825-831
NMR studies have shown that seven new sesquiterpenoids, 3, 4, 5a, and 7-10, isolated from dried samples of the New Zealand liverwort Lepidolaena hodgsoniae have the same substituted cyclopentapyran ring system as the previously described insecticidal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e5fad7b1735b07381092ae78e5b6e44
https://doi.org/10.1021/np050058x
https://doi.org/10.1021/np050058x
Publikováno v:
Tetrahedron. 61:3671-3680
(−)-β-Caryophyllene has been converted into three stereoisomers of a new bicyclic compound that is structurally related to the known macrocyclic diterpene, flexibilene, in the same way β-caryophyllene is related to humulene. Key steps are selecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::150baba30c180e1c35664fe922aa6b40
https://doi.org/10.1016/j.tet.2005.02.018
https://doi.org/10.1016/j.tet.2005.02.018
Publikováno v:
Journal of Natural Products. 67:693-696
The New Zealand tree Quintinia acutifolia has yielded four biflavonoids, the new 2,3,2'',3''-tetrahydroochnaflavone (3), and its 7,7''-di-O-methyl derivative (1). The rare 7-O-methyl-2,3,2'',3''-tetrahydroochnaflavone (2) and 2'',3''-dihydroochnaflav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a5a6bb741117fd1d91d14723af8d63d
https://doi.org/10.1021/np0340394
https://doi.org/10.1021/np0340394
Autor:
Rex T. Weavers, Nina Berova, Nigel B. Perry, Koji Nakanishi, Hideki Ishii, John W. van Klink, Anna J. Barlow, Seung-Hwa Baek
Publikováno v:
Chirality. 16:549-558
Several Anisotome diterpene derivatives were synthesized in an attempt to obtain a crystalline compound for X-ray analysis. Although we were unable to obtain a suitable crystal, the absolute configuration of the irregular diterpene skeleton was deter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6ad31f2338ca8f83fdca9f51f0df09a
https://doi.org/10.1002/chir.20074
https://doi.org/10.1002/chir.20074