Abstract: N-Vinyl-N-alkyl-carboxylic acid amides are prepared, starting from N-ethyl-carboxylic acid amides, in a 3-stage process consisting of the following stages:(a) anodic alkoxylation of the N-ethyl-carboxylic acid amides to give N-.alpha.-alkoxyethyl-carboxylic acid amides;(b) alkylation of these N-.alpha.-alkoxyethyl-carboxylic acid amides with an alkyl halide or dialkyl sulfate in an alkaline medium to give N-.alpha.-alkoxyethyl-N-alkyl-carboxylic acid amides; and(c) splitting off of alcohol from the products of stage (b) by heating to temperatures between about 60.degree. and about 350.degree. C.Instead of stages (b) and (c), it is also possible to carry out the following stages after stage (a):(b.sub.1) splitting off of alcohol from the N-.alpha.-alkoxyethylcarboxylic acid amides obtained in stage (a) by heating to temperatures of about 60.degree. to about 600.degree. C., to give N-vinyl-carboxylic acid amides; and(c.sub.

Abstract: Novel alkoxy derivatives of N-substituted cyclic amines of the formula ##STR1## where R.sup.1 is hydrogen, an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 6 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an aralkoxy or aroxy group,R.sup.2 is a linear or branched alkylene group having from 1 to 4 carbon atoms in the chain,X is OR.sup.3 , where R.sup.3 represents an alkyl group having from 1 to 4 carbon atoms,Y is hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)-O-alkyl, provided that in the case where R.sup.1 is an alkoxy group having from 1 to 4 carbon atoms, Y is not H.

Abstract: Novel alkoxy derivatives of N-substituted cyclic amines of the formula ##STR1## where R.sup.1 is hydrogen, an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 6 to 10 carbon atoms, an alkoxy group having from 1 to 4 carbon atoms, an aralkoxy or aroxy group,R.sup.2 is a linear or branched alkylene group having from 1 to 4 carbon atoms in the chain,X is OR.sup.3, where R.sup.3 represents an alkyl group having from 1 to 4 carbon atoms,Y is hydrogen, (C.sub.1 -C.sub.4)-alkyl, (C.sub.1 -C.sub.4)--O-alkoxy, provided that in the case where R.sup.1 is an alkoxy group having from 1 to 4 carbon atoms, Y is not H. Several of the alkoxylated compounds are excellent fungicides.

Abstract: .alpha.-Chloroacrylic acid chloride is obtained in a high yield by splitting off HCl from .alpha.,.beta.-dichloropropionic acid chloride at an increased temperature and under reduced pressure in the presence of a tertiary phosphine, a quaternary phosphonium salt or a tertiary phosphine oxide, sulfide, halide or imine. .alpha.-Chloroacrylic acid chloride is important as a starting and intermediate material for further syntheses, especially as the starting material for the total synthesis of prostaglandins according to Corey.

Abstract: Process for preparing acetoacetamide-N-sulfofluoride by reacting amidosulfofluoride at a temperature of from 50.degree. to 100.degree. C with diketene, optionally in the presence of inert solvents or diluents.

Abstract: 3-Sulfohalides of 6-methyl-2H-1,3-oxazin-2,4(3H)-dione of the formula I ##STR1## in which X represents fluorine or chlorine are prepared by reacting fluorosulfonyl isocyanate or chlorosulfonyl isocyanate, at a temperature of from -35.degree. to +70.degree. C, optionally in the presence of an inert solvent, with diketene, acetoacetyl fluoride, acetoacetyl chloride, acetoacetic acid or an isopropenyl ester of the formula CH.sub.2 =C(OOCR)-CH.sub.3 in which R represents an alkyl radical having from 1 to 4 carbon atoms, a substituted or unsubstituted phenyl or benzyl radical.

Abstract: Compounds of the formula ##SPC1##In which R represents an alkyl radical having from 1 to 4 carbon atoms and Hal stands for fluorine or chlorine are prepared by reacting at a temperature of from -40.degree. to +20.degree. C an i-propenylalkanoic acid ester of the formula ##EQU1## with an isocyanate of the formulaO=C=N--SO.sub.2 Hal (V)in which R and Hal have the same meaning as above, and isolating the compound of formula III.

Abstract: The potassium salt practically free of fluoride of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide is prepared by cyclization of acetoacetamide-N-sulfofluoride with at least two moles potassium hydroxide, potassium methylate or a mixture of potassium hydroxide and potassium methylate per mole of sulfofluoride in methanol as solvent containing less than 50 % by weight of water at a temperature of from -20.degree. to +60.degree.C and separating the crystalline potassium salt of the oxathiazinone dioxide from the reaction solution. The compound obtained has a pure sweet taste.

Abstract: 6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide or the nontoxic salts thereof is prepared by reacting 6-methyl-2,3-dihydro-1,3-oxazin-2,4-dione-3-sulfo-fluoride of the formula ##EQU1## with at least 1 mole water per mole of fluoride to obtain acetoacetamide-N-sulfo-fluoride with splitting off of CO.sub.2, treating the acetoacetamide-N-sulfofluoride with an aqueous and/or alcoholic base and isolating the oxathiazinone or the salts thereof.

Abstract: 6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide and the nontoxic salts thereof are prepared by reacting acetone and fluorosulfonyl isocyanate in a molar proportion of from 14:1 to 150:1 at a temperature of from 0.degree. to 60.degree.C, distilling off the excess acetone from the reaction mixture with acetoacetamide-N-sulfofluoride and bringing about cyclization by a treatment with bases at a pH of from 5 to 12. The oxathiazinone derivatives are used as sweeteners.

Abstract: 6-Methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide and the nontoxic salts thereof are prepared by reacting acetoacetic acid with fluorosulfonyl isocyanate at a temperature of from -20.degree.C to +50.degree.C in the presence of from 0.5 to 2 moles, calculated on the FSI used, of an alkali methal fluoride or a tertiary amine of the formulaN(R.sub.1)(R.sub.2)(R.sub.3)in which R.sub.1, R.sub.2, R.sub.3 represent identical or different alkyl radicals having from 1 to 10 carbon atoms, two of the radicals R.sub.1 to R.sub.3 optionally form together an alkylene radical having from 4 to 5 carbon atoms which may contain N, O, or S as hetero atom, or one of the radicals R.sub.1 to R.sub.3 represents a phenyl radical, or of pyridine or quinoline, or of a mixture of the aforesaid compounds, and transforming the salt of acetoacetamide-N-sulfofluoride obtained into the oxathiazinone salt or the free oxathiazinone by a treatment with aqueous and/or alcoholic bases.