42240-30-2Relevant academic research and scientific papers
Antifeedant and mosquitocidal compounds from Delphinium x cultorum cv. Magic Fountains flowers
Miles, Jennifer E. C.,Ramsewak, Russel S.,Nair, Muraleedharan G.
, p. 503 - 506 (2000)
Six volatile compounds, ethylmethylbenzene (1), 1-isopentyl-2,4,5- trimethylbenzene (2), 2-(hex-3-ene-2-one)phenylmethyl ketone (3), E and Z isomers of 3-butylidene-3H-isobenzofuran-1-one (4 and 5), and 2-penten-1- ylbenzoic acid (6), were isolated from the mosquitocidal hexane extract of Delphinium x cultorum cv. Magic Fountains flowers. In addition, the ethyl acetate extract, which displayed corn earworm antifeedant activity, yielded 4-hydroxybenzoic acid (7) and bis(4-hydroxyphenyl)methanol (8). However, compounds 7 and 8 were not biologically active.
Spinel-type zinc aluminate (ZnAl2O4) nanoparticles prepared by the co-precipitation method: A novel, green and recyclable heterogeneous catalyst for the acetylation of amines, alcohols and phenols under solvent-free conditions
Farhadi, Saeid,Panahandehjoo, Somayeh
scheme or table, p. 293 - 302 (2010/09/04)
Zinc aluminate (ZnAl2O4) nanoparticles with an average particle size of about 8 nm were easily prepared by the co-precipitation method using aqueous ammonia solution as the precipitating agent. This nanosized spinel-type oxide was characterized by TGA, XRD, FT-IR, TEM, and surface area measurement and used as the heterogeneous catalyst for the acetylation reaction. Efficient acetylation of various amines, alcohols and phenols was carried out over ZnAl2O4 nanoparticles using acetic anhydride and/or acetyl chloride as the acetylating agents at room temperature without the use of a solvent. The method is highly selective, allowing the alcoholic hydroxyl group to be protected while the phenolic hydroxyl group remains intact, and the amine group can be acetylated in the presence of the hydroxyl group. This method is fast and has a high yield. It is also clean, safe, cost effective, compatible with substrates that have other functional groups and very suitable for practical organic synthesis. In addition, the catalyst can be reused without significant loss of activity. Indeed, the catalytic activity of the ZnAl2O4 nanoparticles is higher than that of bulk ZnAl2O4.
Reactivity of acetates in aqueous alcohols
Denegri, Bernard,Kronja, Olga
experimental part, p. 223 - 226 (2011/04/22)
A series of X,Y-substituted benzhydryl acetates (1-3) were subjected to solvolysis in various binary methanol/water and ethanol/water mixtures at 25 °C. The LFER equation log k = sf(Ef + Nf) was used to derive the nucleofu
DABCO and DMAP - Why are they different in organocatalysis?
Baidya, Mahiuddin,Kobayashi, Shinjiro,Brotzel, Frank,Schmidhammer, Uli,Riedle, Eberhard,Mayr, Herbert
, p. 6176 - 6179 (2008/04/05)
(Chemical Equation Presented) What makes a good organocatalyst? DABCO (1,4-diazabicyclo[2.2.2]octane) is a thousandfold better nucleophile (k →) and at the same time a million times better leaving group (k←) than DMAP (4-(dimethylamino)pyridine). This apparent contradiction is resolved by consideration of the intrinsic reaction barriers.
