Results 121 to 130 of about 557 (166)
Some of the next articles are maybe not open access.
Approaches to the Synthesis of Quassinoids
Australian Journal of Chemistry, 1991A range of hydrophenanthrene methyl ethers were subjected to Birch reduction, and the products converted into the epoxides (21), (26) and (27). These were treated with diethylaluminium cyanide, but useful products were not obtained from (21) or (26). However, epoxide (27) was converted into the hydroxy nitrile (28) and thence enone (30), a potentially ...
RJ Hamilton, LN Mander
openaire +1 more source
Quassinoids from Quassia amara
Phytochemistry, 1993Abstract Three new quassinoids, 11-α- O -(β- d -glucopyranosyl)-16-α- O -methylneoquassin, 1-α- O -methylquassin and 12-α-hydroxy-13,18 ...
G Grandolini, G Fardella
exaly +2 more sources
The Ever-Challenging Quassinoids
Synlett, 2006AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire +2 more sources
Quassinoids from Eurycoma longifolia
Journal of Natural Products, 2009Ten new structurally diverse quassinoids (1-10) and 14 known compounds were isolated from the stems of Eurycoma longifolia. The new compounds were two eurycomanone-type C(20) quassinoids (1, 2), one klaineanone-type C(20) quassinoid (3), one C(19) quassinoid (4) with a 1,2-seco-1-nor-6(5-->10)-abeo-picrasan-2,5-olide skeleton, and six eurycomalactone ...
Katsunori, Miyake +4 more
openaire +2 more sources
Antimalarial quassinoids: past, present and future
Expert Opinion on Drug Discovery, 2007This review is a compilation of the investigations reported to date on the sources, isolation, chemistry and antimalarial activities of natural quassinoids and their synthetic and semisynthetic analogs. It also provides an analysis of the in vitro structure-activity relationship of quassinoids for further evaluation in animal models.
Ilias, Muhammad, Volodymyr, Samoylenko
openaire +2 more sources
1973
The Simaroubaceae form a large botanical family of mostly pantropical distribution; only a few representatives (such as Ailanthus) extend into temperate regions. Many species of this family, for example Quassia amara L. (Surinam quassia) and Picraena excelsa Lindt. (=Picrasma excelsa Planch or Aeschrion excelsa Kuntze, Jamaica quassia, have been known,
openaire +2 more sources
The Simaroubaceae form a large botanical family of mostly pantropical distribution; only a few representatives (such as Ailanthus) extend into temperate regions. Many species of this family, for example Quassia amara L. (Surinam quassia) and Picraena excelsa Lindt. (=Picrasma excelsa Planch or Aeschrion excelsa Kuntze, Jamaica quassia, have been known,
openaire +2 more sources
Cytotoxic Quassinoids from Cedronia granatensis
Journal of Natural Products, 1992The NCI in vitro primary disease-oriented antitumor screen has been used to select and guide the fractionation of the organic and aqueous extracts of Cedronia granatensis. Two quassinoids, sergiolide [1] and isobrucein B [2], to which the screening panel cell lines exhibited up to a 1000-fold range of differential sensitivity, were isolated.
M, Tischler +3 more
openaire +2 more sources
Activity of quassinoids as antifeedants against aphids
Journal of Chemical Ecology, 1989A series of quassinoids was tested for antifeedant activity against the aphidMyzus persicae (Hemiptera, Aphididae). Isobrucein B, brucein B and C, glaucarubinone, and quassin decreased feeding at concentrations down to 0.05% and isobrucein A was effective at 0.01%.
J, Polonsky +4 more
openaire +2 more sources
Quassinoids from Quassia indica
Phytochemistry, 1994Abstract Four new quassinoids, indaquassins CF, were isolated from the bark of Quassia indica . Their structures were determined by spectroscopic and chemical evidence. In addition, known compounds, samaderines BE, dihydrosamaderine B, brucein D, soulameolide, cedronin and canthin-2,6-dione were also identified.
Kazuo Koike, Taichi Ohmoto
openaire +1 more source
Quassinoids from Picrasma javanica
Phytochemistry, 1990Abstract Three new bitter principles, the des-4-methylated picrasane type quassinoids, javanicins H, I and J, were isolated from leaves of Picrasma javanica. The structures were determined by spectroscopic data and chemical evidence.
Kazuo Koike, Taichi Ohmoto
openaire +1 more source