Übersetzung für "Thioacetate" in Deutsch

A disadvantage of this procedure is the fact that sodium thioacetate is very expensive.

The thioacetate obtained above is reacted in accordance with Example 1b.

The particularly preferred thiocarboxylate (III) is potassium thioacetate.

From the halogen compounds which may be obtained, for example, in this manner, compounds of the formula XIII, in which Z2 is mercapto can be obtained by reacting with an isothiuronium salt and by subsequent hydrolysis, or by reaction with sodium thioacetate and by subsequent reduction, and compounds of the formula XIII in which Z2 is etherified mercapto can be obtained by reacting with an alkali metal mercaptide.

Examples of suitable anions X? are: fluoride, chloride, bromide, iodide, perchlorate, hydrogen sulfate, sulfate, aminosulfate, nitrate, dihydrogen phosphate, hydrogen phosphate, phosphate, bicarbonate, carbonate, methosulfate, ethosulfate, cyanate, thiocyanate, tetrachlorozincate, borate, tetrafluoroborate, acetate, chloroacetate, cyanoacetate, hydroxyacetate, aminoacetate, methylaminoacetate, di- and tri-chloroacetate, 2-chloropropionate, 2-hydroxypropionate, glycolate, thioglycolate, thioacetate, phenoxyacetate, trimethylacetate, valerate, palmitate, acrylate, oxalate, malonate, crotonate, succinate, citrate, methylene-bis-thioglycolate, ethylene-bis-iminoacetate, nitrilotriacetate, fumarate, maleate, benzoate, methylbenzoate, chlorobenzoate, dichlorobenzoate, hydroxybenzoate, aminobenzoate, phthalate, terephthalate, indolylacetate, chlorobenzenesulfonate, benzenesulfonate, toluenesulfonate, biphenylsulfonate and chlorotoluenesulfonate.

The latter is dissolved in 300 ml of acetone and refluxed with 23 g of potassium thioacetate for 18 hours at 100° C. bath temperature.

For this purpose, the hydroxy group of the compounds of formula VId is first replaced by halogen, and the resulting halides of formula VIb are then reacted with potassium thioacetate to form compounds of the general formula XIX, --S--CO--CH3 wherein R4 has the above meaning.

For this purpose the hydroxyl group of the compounds of formula VIIa is first replaced by halogen, and the reaction product is then reacted with potassium thioacetate to give a compound of formula XXIV -S-CO-CH3 in which R3 has the above meaning.

Suitable anions for derivation of An? include for example fluoride, chloride, bromide, iodide, perchlorate, hydrogensulfate, sulfate, aminosulfate, nitrate, dihydrogenphosphate, phosphate, hydrogencarbonate, carbonate, methosulfate, ethosulfate, cyanate, thiocyanate, tetrachlorozincate, borate, tetrafluoroborate, acetate, cyanoacetate, hydroxyacetate, aminoacetate, methylaminoacetate, mono-, di- or trichloroacetate, 2-chloropropionate, 2-hydroxypropionate, glycolate, thioglycolate, thioacetate, phenoxyacetate, trimethylacetate, valerate, palmitate, oleate, acrylate, oxalate, malonate, crotonate, succinate, citrate, methylenebisthioglycolate, ethylenebisiminoacetate, nitrilotriacetate, fumarate, maleate, benzoate, methylbenzoate, chlorobenzoate, dichlorobenzoate, hydroxybenzoate, aminobenzoate, phthalate, terephthalate, indolylacetate, chlorobenzenesulfonate, benzenesulfonate, toluenesulfonate, biphenylsulfonate or chlorotoluenesulfonate.

The process according to claim 1 wherein the thiocarboxylate is potassium thioacetate.

After heating the contents of the flask to 155° C., 50.4 g of potassium thioacetate (purity>99%) was added.

The residue is dissolved in 100 ml of N-methylpyrrolidone, 11.42 g (0.1 mol) of potassium thioacetate are introduced and the reaction mixture is heated for 90 minutes at 130° C.

Compounds of the formula XVI in which Y5 represents a group --S(O)n --H and n represents 0 can be obtained, for example, by reacting a compound of the formula XVII with ammonium dithiocarbamate, or reacting a corresponding compound of the formula XVI in which Y5 represents halogen with thiourea or sodium thioacetate and freeing the desired mercaptan therefrom by solvolysis or reduction.

The yield of C(22)-olefin of formula V is, however, higher when the addition product is first transformed into an n-C1-4 -alkanoylate such as the formate, acetate, n-propionate or n-butyrate or a sulphonate such as the mesylate or a thiolate such as the thioacetate and then the ?-acyloxysulphonyl grouping is reductively eliminated from the resulting ester.

Potassium thioacetate (28.48 g, 0.25 mol, 1.00 eq) is added and the mixture is heated to reflux.

Suitable for use as sulphurizing agent are, for example, hydrogen sulphide, sodium sulphide, thiourea or potassium thioacetate. Suitable solvents are all solvents which are inert under the reaction conditions and mixtures thereof.

3-Aminopropyltriethoxysilane (132.82 g, 0.60 mol, 1.00 eq) is initially charged in ethanol (300 ml) in a three-neck flask with precision glass stirrer, internal thermometer, dropping funnel and reflux condenser, and cooled to ?78° C. 2-Chloroethyl isocyanate (63.34 g, 0.60 mol, 1.00 eq) is added dropwise at ?78 to ?68° C. within 1.75 h and then the mixture is heated to 50° C. Potassium thioacetate (68.53 g, 0.60 mol, 1.00 eq) is added in five portions and the mixture is heated to reflux.