Acetic acid, silver salt

Acetic acid silver salt Acetic acid, silver (1+) salt. See Silver acetate Acetic acid sodium salt anhydrous. See Sodium acetate anhydrous Acetic acid sodium salt trihydrate. See Sodium acetate trihydrate... 

The attempts to methylate 1-methyl-IbP 228 by means of oxidative decarboxylation of acetic acid silver salts failed because this base bound the silver ions into an insoluble complex. However, the catalytic decomposition of mrt-butylhydroperoxide in 70% H2SO4 first provided 1,2-dimethyl-IbP 298, later converted into a mixture of 1,2,5- and 1,2,7-trimethyl-IbP 299 and 300 isomers that were hard to separate. The final compound is 1,2,5,7-tetramethyl-IbP 301 (78MI3). 

B. l,l-Diphenyl-2-bromo-Z-acetoxy- -j>ropene. A 250-ml. flask equipped with a condenser is charged with 17.6 g. (0.050 mole) of 1,1-dibromo-2,2-diphenylcyclopropane, 12.5g. (0.075 mole) of silver acetate [Acetic acid, silver(l +) salt] (Note 4), and 50 ml. of glacial acetic acid, then immersed in an oil bath at 100-120° for 24 hours (Note 5). After cooling, the mixture is diluted with 200 ml. of ether and filtered. The ethereal filtrate is washed with two 100-ml. portions of water, two 100-ml. portions of aqueous saturated sodium carbonate, and finally with two 100-ml. portions of water. After drying over anhydrous sodium sulfate, the ether is removed on a rotary evaporator. Distillation of the resulting residue under reduced pressure yields 12.0 g. (72%) of the product, b.p. 142-145° (0.15 mm.), 1.6020-1.6023 (Note 6). 

Silver acetate [Acetic acid, silver(l+) salt], 33... 

Acetic acid, mtro-, methyl ester [2483-57-0],55,77,78,57,60 Acetic acid, phenoxy-, [122-59-8], 56, 68 Acetic acid, silver(l+) salt, [563-63-3], 56, 33... 

Although this is the classical method of anhydride formation it has been replaced to a large extent by the acylation of free carboxylic acids (method 341). The conditions employed and the solvents used in this reaction vary widely. Excellent directions are given for the preparations of nicotinic anhydride (89%) and acetic propionic anhydride (60%) from the respective potassium and sodium salts of the carboxylic acids. Silver salts of acids have also been used. The reaction has been extended to the preparation of mixed anhydrides of short- and long-chain fatty acidsbut has failed in the preparation of mixed anhydrides of substituted benzoic acids. ... 

Saccharic acid. Use the filtrate A) from the above oxidation of lactose or, alternatively, employ the product obtained by evaporating 10 g. of glucose with 100 ml. of nitric acid, sp. gr. 1 15, until a syrupy residue remains and then dissolving in 30 ml. of water. Exactly neutralise at the boiling point with a concentrated solution of potassium carbonate, acidify with acetic acid, and concentrate again to a thick syrup. Upon the addition of 50 per cent, acetic acid, acid potassium saccharate sepa rates out. Filter at the pump and recrystaUise from a small quantity of hot water to remove the attendant oxahc acid. It is necessary to isolate the saccharic acid as the acid potassium salt since the acid is very soluble in water. The purity may be confirmed by conversion into the silver salt (Section 111,103) and determination of the silver content by ignition. 

Copper acetate, ferrous acetate, silver acetate [563-63-3] basic aluminum acetate, nickel acetate [373-02-4] cobalt acetate, and other acetate salts have been reported to furnish anhydride when heated. In principle, these acetates could be obtained from low concentration acetic acid. CompHcations of soHds processing and the scarcity of knowledge about these thermolyses make industrial development of this process expensive. In the eady 1930s, Soviet investigators discovered the reaction of dinitrogen tetroxide [10544-72-6] and sodium acetate [127-09-3] to form anhydride ... 

Isatin (190) is a compound with interesting chemistry. It can be iV-acetylated with acetic anhydride, iV-methylated via its sodium or potassium salt and O-methylated via its silver salt. Oxidation of isatins with hydrogen peroxide in methanolic sodium methoxide yields methyl anthranilates (81AG(E)882>. In moist air, O-methylisatin (191) forms methylisatoid (192). Isatin forms normal carbonyl derivatives (193) with ketonic reagents such as hydroxylamine and phenylhydrazine and the reactive 3-carbonyl group also undergoes aldol condensation with active methylene compounds. Isatin forms a complex derivative, isamic acid (194), with ammonia (76JCS(P1)2004). 

Many reagents are able to chlorinate aromatic pyrazole derivatives chlorine-water, chlorine in carbon tetrachloride, hypochlorous acid, chlorine in acetic acid (one of the best experimental procedures), hydrochloric acid and hydrogen peroxide in acetic acid, sulfuryl chloride (another useful procedure), etc. iV-Unsubstituted pyrazoles are often used as silver salts. When methyl groups are present they are sometimes chlorinated yielding CCI3 groups. Formation of dimers and trimers (308 R = C1) has also been observed. 

Benzyl cyanide, C Hj. CH.,CN, or phenyl-aceto-nitrile, is a constituent of cress oil, and probably of neroli oil. It is a strong smelling liquid boiling at 231 5°, and having a specific gravity 1 0146 at 18°. On boiling with alcoholic potash it yields phenyl-acetic acid, which can be identified by its melting-point, 77°, and by the analysis of its silver salt. 

In a 250-ml., three-necked flask fitted with a mechanical stirrer, a thermometer, and a 25-ml., graduated, pressure-equalizing dropping funnel are placed 7.60 g. (0.050 mole) of phenoxyacetic acid [Acetic acid, phenoxy-] (Note 1), 5.40 g. (0.050 mole) of 1,4-benzoquinone [2,5-Cyclohexadiene-l,4-dioneJ (Note 2), 1 g. (0.006 mole) of silver nitrate [Nitric acid silver(l +) salt] (Note 3), and 125 ml. of water (Note 4). The mixture is then stirred and heated to 60-65° by means of a heating mantle until dissolution is complete. The resulting solution is stirred... 

Silver Pentaglyceryl Trinitramine). CH3.C(CH2NAgN02)3l mw 572.81, N 14.68%. OB to C02 -23.74%, sol in aq ammonia. Prepn from pentaglyceryl trinitrourethane in ammoni-acal soln upon addition of Ag nitrate in acetic acid. The Ag salt detonates when heated Refs 1) Beil — not found 2) Blomquist, OSRD 4134(1944)... 

Silver salt. On treating a soln of picrylamino-tetrazole in acet acid with a small excess of aq Ag nitrate soln, a yel ppt is obtained which corresponds to the formula C7H30 N8Ag, N=27.89%. It is insol in nitric acid and difficultly sol in ammonia. It detonates violently on heating in a sealed tube or on impact... 

Silver trifluoroacetate Acetic acid, trifluoro-, silver(l-t-) salt (8,9) (2966-50-9)... 

N-CH2 N CH2 with 98% nitric acid in acetic anhydride (Ref 8) 1,2-Dinitro-lminoimidazolidine, Silver Salt. (No formula given). When 1,2-Dinitraminoimidazolidine, N02 H2C-N. 

Phenylacetamide has been obtained by a wide variety of reactions from benzyl cyanide with water at 250-260° 6 from benzyl cyanide with water and cadmium oxide at 240° 6 from benzyl cyanide with sulfuric acid 7 8 by saturation of an acetone solution of benzyl cyanide with potassium hydrosulfide 9 from benzyl cyanide with sodium peroxide 10 by electrolytic reduction of benzyl cyanide in sodium hydroxide 11 from ethyl phenyl-acetate with alcoholic 12 or aqueous 13 ammonia from phenyl-acetic acid with ammonium acetate 14 or urea 15 from diazoacetophenone with ammoniacal silver solution 16 from phenyl-acetic acid imino ether hydrochloride and water 17 from acetophenone with ammonium poly sulfide at 215° 18 from benzoic acid 19 and by heating the ammonium salt of phenyl-acetic acid.20... 

Ethane-tetracarboxylic Acid Dianhydride, [3,7-Dioxa-2,4,6,8 tetra-oxo-bicyclo(3,3,0)-octane], mw 170.1, OB to COg —66%, cryst, dec over 150°. It was first prepd in 1920 by heating the acid in a six-fold excess of acetic anhydride at 70—75°, then in 1923 by treating the acid with AcCl and heat, or by treating with oxalyl chloride, the acid or the tetra-silver salt of the acid (Ref 6)... 

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