Potassiiun Acetate

Cyclopenteaediol isomers have previously been prepared by hydrolysis of acetates produced by reaction of dibromocyclopen-tene with potassiiun acetate in acetic acid by reaction of cyclo-pentene with selenium dioxide in acetic anhydride or by reaction of cyclopentadiene with phenyl iodosoacetate/ with lead tetraacetate, or with peracetic acid in the absence of base. Preparation of cydopentenediol without intermediate formation of acetates has been accomplished by reaction of cyclopentadiene with hydrogen peroxide in the presence of osmium tetroxide in terf-butanol, and hy reaction of cyclopentadiene with peracetic acid in a methylene chloride suspension of anhydrous sodium carbonate, followed by hydrolysis of the resulting epoxycyclo-pentene. ... 

Transfer 3 ml of the digested SMnple to tiie arsine generating vessel, add sufficient water to produce 35 ml, and then add 5 ml of hydrochloric acid, 2 ml of a 15% solution of potassiiun iodide, and 0.5 ml of Staimous Chloride Reagent (40%) swirl the solution, and allow to stand for 15 minutes. Insert a pad of glass wool moistened witii lead acetate solution into the lower tube of tiie generating vessel. Introduce 3 ml of the Silver DDC Solution into the absorber tube, and 3 g of grMiulated zinc into the flask. Mid immediately assemble the two parts of tiie apparatus. Allow tiie evolution of arsine to continue for 1 hour. Transfer the Silver DDC... 

One is the pH sensitivity of many systems, particularly lAere there is a third continent. Thus whereas the potassiiun persulfC ate - sodium bisulfitu system is accelerated by Pe in acidic media, acceleration oi polymerisation occurs with Cu in an alkaline medium. Unusually with Cu, a second peak occurs at alkaline pH if both methyl methacrylate and vinyl acetate are added, one of the few examples where a vinyl acetate copolymer is formed in the presence of a copper compound. (2). Conplex formation is indicated, producing active intermediates vdiich... 

The potassium salt of ethyl o-nitrophenylpyruvate is prepared essentially according to the method of Wislicenus and Thoma. However, the isolation of ethyl o-nitrophenylpyruvate has been eliminated by liberating the ester from its potassiiun salt in the acetic acid used as solvent for the hydrogenation. Catalytic... 

MERCURY(n) NITRATE (10045-94-0, anhydrous 7783-34-8, monohydrate) Hg(N03)2 H,0 Noncombustible solid. Light sensitive. A powerful oxidizer accelerates the burning of combustible materials. Violent reaction, or may form explosive materials, with reducing agents, including hydrides, nitrides, phosphorus, stannous chloride, and sulfides alkyl esters (forms explosive alkyl nitrates) combustible materials (especially if finely divided), phosphinic acid, hypophosphoric acid, metal powders petroleiun hydrocarbons. Forms heat- and/or shock-sensitive compounds with acetylene (forms explosive mercmy acetylide), ethanol and other alcohols (may form explosive mercury fulminates), ferrocene, isobutene, phosphine gas (forms heat- and shock-sensitive precipitate) potassiiun cyanide, sulfur. Incompatible with strong acids, acetic anhydride, ammonia, ammonium hexacyanofenate(II), organic azides, citric acid, hydrazinium perchlorate, isopropyl chlorocarbonate, nitrosyl perchlorate, sodium thiosulfate, sulfamic acid, thiocyanates, hydrozoic acid, methyl isocyanoacetate, sodium peroxyborate, trinitrobenzoic acid, urea nitrate. Aqueous solution corrodes metals. 

Hydrochloric acid Acetic acid Sodium hydroxide Potassium hydroxide Ceric ammonium nitrate Potassium iodide Potassium cyanide Ferric chloride Ferric nitrate Ethylene glycol iodine Potassiiun hydroxide Elhylenediamine Catechol... 

Organoboranes derived from 9-BBN react with the acetate Ph2C=NCH(OAc)(COOEt) in the presence of a hindered potassiiun aryloxide to yield protected higher amino acids. ... 

Removal of the Boc-protective group of 16 was achieved by treatment with excess anhydrous HCl in EtOAc or with neat TEA. Thus, 16 was treated with large excess of anhydrous HCl in ethyl acetate at -16 to -14 °C for Ih followed by removal of the excess HCl under reduced pressure at -20 to 0 °C. The solution was diluted with diethyl efiier at -3 to 3 °C and die pH of the mixture was adjusted to 1.S-2.S by addition aqueous potassiiun bicarbonate. The resulting mixture was warmed to 19 to 23 °C and stirred for 30 min. The solid product was collected by filtration, rinsed with H2O and dried in vacuo at 35 to 40 °C to give HCl H-LLK(Z)LLLLK(Z)LLLLK(Z)-OBzl (17a) in 95% yield and 87.7 area % purity. 

---