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Potassium acetate cyanide

Methoxy-D-Homo-estra-l,3,5(10)-trien-17a-one (96)" (/) Acetic acid (6.4 ml) is added to a stirred solution of estrone methyl ether (93 1.1 g) in ethanol (35 ml) containing potassium cyanide (6 g) at 0°. After being stirred for 1 hr at 0° and 2.5 hr at room temperature, the reactants dissolve and potassium acetate preciptates. Water (65 ml) is added to the reaction mixture and the precipitated solid is collected by filtration. The crude product is dissolved in ethyl acetate and the ethyl acetate solution is washed with water, dried over anhydrous magnesium sulfate and evaporated to dryness under reduced pressure. Recrystallization of a portion of the crude product from cyclohexane-acetone gives 3-methoxy-17a-cyano-estra-l, 3,5(10)-trien-17j5-ol (94a) as needles mp 158.5°. [Pg.388]

PlCOLINIC ACID HYDROCHLORIDE, 79 Potassium acetate, 55 Potassium amide, 91 Potassium bromide, 81, 101 Potassium carbonate, 21 Potassium cyanide, 38, 44 Potassium permanganate, 79 Pressure reaction, 40, 81, ior i,3-Propanedione, i,3-diphenyl-, 32 Propionic acid, /3-3-acenaphthenyl-... [Pg.57]

Catalysts synthesized from crown ether monomers 61 and 62 by copolymerization with styrene and either p-divinylbenzene or p,p -divinylbiphenyl (63) are listed in Table 14 along with their relative activities for solid/solid/liquid reactions of potassium acetate with benzyl chloride (Eq. (13)) and potassium cyanide with 1,4-dichlorobutane (Eq. (14)) in acetonitrile 183). [Pg.97]

The synthesis of a C-labelled version of naratriptan (3b) is highlighted in Scheme The indole ring of naratriptan hydrochloride (3) was oxidatively cleaved using sodium periodate to give ketoformanilide 45. Cyanation of 45 with potassium [ C]cyanide in aqueous ethanol gave the intermediate amidine 46, which was reduced directly with NaBH4 in acetic acid to afford C-labelled naratriptan (3b), which was isolated as the hydrochloride salt. [Pg.173]

The radiolabel was introduced by displacement of a quaternary amine with potassium 14C-cyanide to give a nitrile. The nitrile was readily converted to indole-3-acetic acid by hydrolysis with 20% aqueous potassium hydroxide. Reduction of the indole-3-acetic acid derivative with lithium aluminum hydride in tetrahydrofuran gave a typtophol with 95% yield. [Pg.110]

Cyanomethylation of compounds (3) and (4) was carried out using formaldehyde/potassium cyanide in aqueous ethanol at elevated pressures in the presence of potassium acetate and alumina. Under the conditions of the reaction and subsequent workup, the cyanomethylated products were converted into acetic acid derivatives (e.g., (38)) and isolated as ethyl ester derivatives (e.g., (39)) (Scheme 8) <69TL1909>. No nitrile-containing products were isolated. [Pg.193]

Potassium eobalti-cyanide may also be produced by the addition of dilute acetic acid or hydrogen chloride to a solution of the cobalto-cyanide in excess of potassium cyanide. The acid liberates hydrocyanic acid, which reacts as follows ... [Pg.70]

Lead Cobalti-cyanide, Pb3[Co(CN)6]2.4H20, is prepared by the action of hydrogen cobalti-cyanide upon lead carbonate.1 It yields laminated crystals, soluble in about three parts of water. The salt is not precipitated by adding potassium cobalti-cyanide to a solution of either lead acetate or nitrate. [Pg.71]

Other procedures for the preparation of 2,4-dimethoxy-hcnzonitrile include the reaction of 2,4-dimethoxybenzamide with thionyl chloride,3 the action of acetic anhydride on 2,4-dirnethoxybenzaldoxime,7 the reaction of diazotized 2,4-dimethoxyaniline with potassium copper cyanide,8 and the action of cyanogen bromide on resorcinol dimethyl ether in the presence of aluminum chloride. ... [Pg.55]

The retention times are 8.2 min for [Cl-(CH2)3]g(SiOi 5)5, 16.0 min for [Cl-(CH2)3],o(SiOi 5)10 and 37.4 min for [Cl-(CH2)3]i2(SiOi 5)12 at 7 mL min flow rate. The substitution of the chlorine atoms at octa [(3-chloropropyl)-silsesquioxane] by acetoxy- or cyano groups is possible by using potassium acetate or sodium cyanide and 18-crown-6 as phase transfer catalyst in acetonitrile. In addition to the observed substitution, partial rearrangement to the greater deca- and dodeca-silsesquioxane cages, also took place. [Pg.694]

Puschel and Stefanac ° use alkaline hydrogen peroxide in the oxygen flask method to oxidize arsenic to arsenate. The arsenate is titrated directly with standard lead nitrate solution with 4-(2-pyridylazo) resorcinol or 8-hydroxy-7-(4-sulpho-l-naphthylazo) quino-line-5-sulphonic acid as indicator. Phosphorus interferes in this method. The precision at the 99% confidence limit is within 0.67% for a 3-mg sample. In another variation, Stefanac used sodium acetate as the absorbing liquid, and arsenite and arsenate are precipitated with silver nitrate. The precipitate is dissolved in potassium nickel cyanide (K2Ni(CN)4) solution and the displaced nickel is titrated with EDTA solution, with murexide as indicator. The average error is within + 0.19% for a 3-mg sample. Halogens and phosphate interfere in the procedure. [Pg.189]


See other pages where Potassium acetate cyanide is mentioned: [Pg.95]    [Pg.146]    [Pg.515]    [Pg.104]    [Pg.68]    [Pg.714]    [Pg.195]    [Pg.198]    [Pg.279]    [Pg.115]    [Pg.75]    [Pg.59]    [Pg.57]    [Pg.268]    [Pg.691]    [Pg.694]    [Pg.714]    [Pg.317]    [Pg.96]    [Pg.184]    [Pg.96]    [Pg.737]    [Pg.165]    [Pg.67]    [Pg.71]    [Pg.76]   
See also in sourсe #XX -- [ Pg.241 ]




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