Abstract: The present invention relates to a process for preparing ethylene urea in solid form, in which a water-comprising product melt of ethylene urea is cooled on a breaking-up apparatus and the water content of the solid obtained is from 5 to 15% by weight. Furthermore, the invention relates to ethylene urea as solid prepared by a process according to the invention, wherein the water content of the solid is from 5 to 15% by weight and the solid displays lasting powder flow.

Abstract: The present invention provides a method for producing N-acyl carbamate in high yield. The method of the present invention comprises the step of reacting an unsaturated acid halide with a carbamate in the presence of a hindered amine. Another method of the present invention comprises the step of reacting a N,N-diacyl carbamate with an active hydrogen compound.

Abstract: A process for preparing N-alkenylureas of the general formula I ##STR1## where R.sup.1 and R.sup.2 are hydrogen, C.sub.1 - to C.sub.40 -alkyl, C.sub.2 - to C.sub.40 -alkenyl, C.sub.3 - to C.sub.20 -cycloalkyl, C.sub.4 - to C.sub.20 -alkylcyc1oalkyl, C.sub.4 - to C.sub.20 -cycloalkylalkyl, aryl, C.sub.7 - to C.sub.20 -alkylaryl or C.sub.7 - to C.sub.20 -aralkyl, or aryl, C.sub.7 - to C.sub.20 -alkylaryl or C.sub.7 - to C.sub.20 -aralkyl which are mono- to pentasubstituted by C.sub.1 - to C.sub.8 -alkyl, C.sub.1 - to C.sub.8 -alkoxy or halogen, together are a C.sub.2 - to C.sub.10 -alkylene chain which is unsubstituted or mono- to hexasubstituted by C.sub.1 - to C.sub.8 -alkyl, andR.sup.3 and R.sup.4 are hydrogen or C.sub.1 - to C.sub.8 -alkyl,by reaction of ureas of the general formula II ##STR2## where R.sup.1 and R.sup.2 have the abovementioned meanings, with an alkenyl carboxylate of the general formula III ##STR3## where R.sup.3 and R.sup.4 have the abovementioned meanings and R.sup.5 is hydrogen, C.sub.

Abstract: The present invention provides a novel N-hydroxyurea compound of chemical formula (I) wherein R.sup.1 and R.sup.2 are each independently hydrogen or C.sub.1 -C.sub.4 alkyl; Ar is phenyl or mono-, di- or trisubstituted phenyl; A is a valence bond or a C.sub.1 -C.sub.6 alkylene chain, optionally having one double bond or one triple bond in the chain, and optionally having one or more C.sub.1 -C.sub.4 alkyl groups attached to the chain: X is oxygen or sulfur, n is an integer of 3 to 6; M is hydrogen, pharmaceutically acceptable cation or a metabolically cleavable group: and X and A may be attached at any available position on the ring. These compounds are useful for treatment or alleviation of inflammatory diseases, allergy and cardiovascular diseases in mammals and as the active ingredient in pharmaceutical compositions for treating such conditions.

Abstract: The present invention provides a process for producing a variety of unsaturated carbamic acid derivatives from corresponding unsaturated carbamates by substitution reaction. The present invention provides a process for producing unsaturated carbamic acid derivatives, comprising reacting an unsaturated carbamate represented by ##STR1## wherein R represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.1 represents a residue of an alcohol from which an OH group is removed,with an alcohol, a primary or secondary amine or an oxime at a temperature of 80.degree. to 150.degree. C. to substitute the --OR.sup.1 group in the formula (A).

Abstract: Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates or substituted isocyanates by reaction of an adduct of isocyanic acid and a tertiary amine with a primary and secondary amine, an alcohol, a thiol or a compound having one or two non-cumulated olefinic double bonds, and a process for the preparation of N-mono- or N,N-disubstituted ureas by reaction of ammonium isocyanates with a primary or secondary amine in a diluent.

Abstract: Process for the removal of isocyanic acid from a gaseous mixture of isocyanic acid and ammonia by introducing a tertiary amine or ether at 250.degree. to 600.degree. C. The gaseous reaction mixture is passed into an inert diluent and cooled, to condense an adduct of isocyanic acid and tertiary amine or ether, and the ammonia being removed as a gas.

Abstract: Aniline derivatives of the formula ##STR1## where R.sup.1, Y, A, Z and n have the meanings given in the description, are used for controlling undesirable plant growth.