Webtert-butoxide (2.93 g, 0.02 mol) was stirred in dry diethyl ether (45 mL) at 0°C. A mixture of 3-methyl-2-butanone 1 (1.72 g, 0.02 mol) and diethyloxalate (1.46 g, 0.01 mol) was added dropwise over 10 min. and the mixture was stirred for one day (25°C). The salt was precipitated and collected by filtration, WebNovel compounds, compositions and methods effective for the prevention and treatment of mast-cell mediated inflammatory disorders are described. The compounds, compositions and me

二乙二醇,_上海甲美精细化工有限公司

WebBis-2-hydroxyethyl ether. Chemical/Physical. The hydrolysis rate constant for bis (2-chloroethyl) ether at pH 7 and 25 °C was determined to be 2.6 x 10 Vh, resulting in a half-life of 3.0 yr. Products of hydrolysis include 2- (2-chloroethoxy)ethanol, bis (2-hydroxyethyl) ether, HCl, and/or 1,4-dioxane (Ellington et al., 1988 Enfield and Yates ... WebDiethylene glycol (2,2′-dihydroxydiethyl ether, ethylene diglycol, 2,2′-oxydiethanol, 3-oxapentane-1,5-diol) is a viscous, sweet-tasting hydroscopic liquid. It is used as a plasticizer, antifreeze, lubricant, and liquid fuel (e.g., Sterno Wick Chafing Fuel, Des Plaines, IL). Its solubility in both organic and aqueous solutions has resulted ... gmo insects

TRIETHYLENE GLYCOL CAMEO Chemicals NOAA

WebThree new flavone glycosides, one known flavone glycoside, and the phenolic derivative apiopaenonside were isolated and identified from the ethyl acetate fraction of the aerial parts of Scleranthus perennis. The planar structures were elucidated through extensive analysis of UV-Vis, IR, and 1H NMR and 13C NMR spectral data, including the 2D techniques … WebDI(Hydroxyethyl)ether: Description: diethylene glycol, also known as 2,2'-oxydiethanol or 2-hydroxyethyl ether, belongs to the class of organic compounds known as dialkyl ethers. … WebDiethyl ether (DEE) is widely employed as solvent for Grignard synthesis. It has been reported as a hydroboration solvent. DEE is a promising compression-ignition fuel and its … bombelli mathematician