Ethy acetate

Extraction with ethy acetate centri fugati on... 

Extraction with methano and centrifugation evaporation redisso ution in water and extraction wi th ethy acetate H2O removed (anhydrous Na2S04) and concentration separation by TLC... 

Extraction samp e with ethy acetate separation by reverse-phase HPLC derivatization with N-methy -N-trimethy -siy tri f uoroacetamide Centrifugation e ution from reverse-phase co umns with sodium... 

Typical procedure for the oxidation of hydrocarbons. To a stirred mixture of hydrocarbon (2 mmol) and 3 (100 mg) in 1,2-dichloroethane/ethy acetate (7 1) was added a 30% solution of peracetic acid in ethyl acetate (6 mmol in 4 ml) dropwise at reflux over the period of 2 h. After 2 h at reflux the mixture was cooled, the supported ruthenium complex filtered off and the product analysed. 

Preparation of the 2-deoxy- -glycoside 47 with triphenyltin hydride The thionocarbonate 46 (0.1 mmol) [see Eq. (19)] was diluted with anhydrous toluene and AIBN was added (0.025 mmol as a standard solution in toluene). The reaction mixture was purged with argon and then heated to 110°C for 5 min, after which triphenyltin hydride (0.2 mmol) was added dropwise as a solution in toluene. The reaction mixture was heated for 1 h, cooled, and purified by placing the entire reaction mixture on a 2 x 16-cm column of silica gel. Elution with 85 15 hexanes-ethy acetate afforded 0-(3,4,6-tri-0-benzyl-2-deoxy-(3-D-glucopyranosyl)-(l—>6)-l,2 3,4-di-0-isopropylidene-a-D-galactopyranose 47 [see Eq (19)] in 90% yield and as a clear liquid [a] -45.1° (c 0.57, CHCy. 

While high polymers of jS-lactones can also be formed by cationic polymerization, most of the commercial production seems to be by the anionic route. Carboxylate salts such as sodium acetate or benzoate are commonly the initiators, but other nucleophiles, such as triethylamine, betaine, potassium t-butoxide, aluminum and zinc alkoxides, various metal oxides and tris(dimethylamino)benzylphosphonium chloride (the anion of which is the initiator), are of value. Addition of crown ethers to complex the counter cation increases the rate of reaction. When the reaction is carried out in inert but somewhat polar organic solvents, such as THF or ethy acetate, or without solvent, chain propagation is very fast and proceeds without transfer reactions. 

Use SpartanView to identify the carbonyl stretching frequencies in acetone, ethy acetate, and N,N-dimethylformamide. Is each compound easily distinguished by infrared spectroscopy ... 

Sample is mixed with ethy acetate, and NaCl is added. After stirring, supernatant is injected... 

Federal name O Glycero 1 CH3O H C3H3O H Petroleu m jelly Toluen e Steari c acid Olei c acid Mineral oil Ethy 1 ethe r Aceton e Butyl acetate... 

S ) -3/3-Hydroxy-16a, 17 a-ethylene-18,20-cyclopregn-5-en-20-ol 3 -acetate, 349 3 /3-Hydroxy-16a, 17 a-ethylene-16 -niethy 1-enepregn-5-en-20-one acetate, 349 3 -Hydroxy-16a, 17 a-ethy lene-17 -methyl-enepregn-5-en-20-one acetate, 349 3/3-Hydroxy-16a, 17a-ethylenepregn-5-en-20-one acetate, 349... 

Chemical Name [ (3-(2-(Diethylamino)ethy ] -4-methyl-2-oxo-2H-1 -benzopyran-7-yl] oxy) acetic acid ethyl ester hydrochloride... 

Preparation of 5a,6a-0xido-17a-Hydroxya//opregnane-3,20-dione 3,20-Bis-(Ethy ene Ketal) A solution was prepared by heating 19.96 g (0.0477 mol) of 17a-hydroxyprogesterone 3,20-bis-(ethylene ketal) and 500 ml of benzene. After the solution was effected the flask was cooled to 5°C and a mixture of 3.68 g (0.0449 mol) of sodium acetate and 174 ml of 40% peracetic acid was added with stirring. The reaction mixture was stirred in the ice bath for 3 hours. The lower peracid layer was separated, diluted with water and extracted twice with benzene. 

A solution of 0.144 g of the 3-ethy ene glycol ketal of 5Q ,1 1/3,17Q ,21-tetrahydroxy-6/3-fluoro-16Q -methylallopregnane-3,20-dione 21-acetate in 12 ml of chloroform and 0.1 ml of absolute alcohol was cooled to -10°C in an ice-salt bath and a stream of anhydrous hydrochloric acid was gently bubbled through the solution for 2.5 hours while the temperature was maintained between -5°Cand -15°C. The solution wasthen diiuted with 25 ml of chloroform, washed with dilute sodium bicarbonate and water, dried over anhydrous sodium sulfate, and evaporated to dryness under reduced pressure at BO t or less to give 60 -fluoro-11/3, 170 ,21 -trihydroxy-16Q -methyl-4-pregnene-3,20-dione 21-acetate. 

Note TLC was performed on silica gel, and the solvents were (1) -bntanol/glacial acetic acid/water (2 1 1, v/v), (IV) isoamyl alcohol/ethy methyl ketone/glacial acetic acid/water (40 40 7 13, v/v), (VII) n-bntanol/2-propanol/water/glacial acetic acid (30 50 10 2, v/v), (VIII) ethyl methyl ketone/acetic acid/methanol (3 1 1, v/v), and (IX) n-bntanol/benzyl alcohol/glacial acetic acid (8 4 3, v/v). 

Ac- EDTA(4.5) 0.1 Msodium acetate-0.1 Af acetic acid-0.1 Afdisodium ethy-lenediamine tetraacetic acid, pH 4.5... 

Ethy leiie Glycol PAA Polyacrylic acid G.AA Glacial Acetic Acid PT Propanelriol... 

ETHY LENE GLYCOL DIACETATE Ethylene Acetate, Glycol Dlacetate, Ethylene Diacetate NL 1 1 0... 

Ethyl Acetate. Catalysts proposed for the vapor-phase production of ethy l acetate include silica gel. zirconium dioxide, activated charcoal, and potassium hydrogen sulfate. More recently, phosphoric-acid-treated coal and calcium phosphate catalysts have been described. 

Acetic Acid, Azido Derivative (Azidoacetic Acid or Triazoacetic Acid), N,.CH2. COsH, mw 101.07, N 41.58%. Col hygrosc plates, mp ca 16°, bp 93° at 3 mm, d 1.354 at 33° Detonates violently on heating in a capillary tube expl mildly with evoln of flame on heating on a hot plate. Can be prepd by shaking ethy tester of azidoacetic acid with aq 20% KOH soln... 

Aminothiazole, with acetaldehyde, 42 to 2-mercaptothiazoie, 370 4-Aminothiazole-2,5-diphenyl, to 2,5 di-phenyl-A-2-thiazoline-4-one, 421 Ammothiazoie-A -oxide, 118 2-Aminothiazoles. 12 acidity of, 90 and acrylophenone, 42 acylations of, with acetic acid. 53 with acetic anhydride, 52 with acyl halides, 48 with chloracetyl chloride, 49 with-y-chlorobutyrylchloride, 50 with 0-chloropropionylchloride, 50 with esters, 53 with ethy acrylate, 54 with indoiyl derivatives, 48 with malonic esters, 55 with malonyl chloride, 49 with oxalyl chloride, 50 with sodium acetate, 52 with unsaturated acyl chloride, 49 additions to double bonds, 40 with aldehydes, 98 alkylations, with alcohols, 38 with benzyhydryl chloride, 34 with benzyl chloride, 80 with chloracetic acid, 33 with chloracetic esters, 33 with 2-chloropropionic acid, 32 with dialkylaminoalkyl halides, 33 with dimethylaminoethylchloride, 35 with ethylene oxide, 34, 38... 

An early report by Meldola and Streatfeild (146) described an impure sample of Ni(ArNNNAr)2 (Ar = P-C6H4-NO2). Formation of nickel(II) diaryltriazenide complexes Ni(ArNNNAr)2py2 by treatment of nickel acetate with triazenes and pyridine followed by base (Na2C03), and the subsequent thermal decomposition of these products to leave the pyridine-free complexes Ni(ArNNNAr)2, was first reported by Dwyer and Mellor in 1941 (74). Prolonged, vigorous treatment of the latter products with pyridine, ethy-lenediamine (en), and o-phenanthroline (o-phen) gave the adducts... 

Polycarboxylic Acids. Carboxylic acids have been found to bind strongly to actinide ions. The primary binding mode for the carboxyhc acids is bidentate. The affinity of the low-valent actinides with these ligands increases with the density of the hgand, for example, ethy lenediaminetetraacetate (EDTA) > acetate. For An" +, the EDTA ligand is hexadentate with a twist conformation. Diethylenetriaminepentaacetate (DTPA) has an even higher affinity for both An + and An + ions. 

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