FOERFARANDE FOER FRAMSTAELLNING AV RENA OSYMMETRISKT DISUBSTITUERADE KARBAMIDER

Process for the preparation of pure, unsymmetrically disubstituted ureas of the general formula I in which R denotes a phenyl radical which is unsubstituted, or monosubstituted or polysubstituted by halogen atoms or alkyl, alkoxy, aryloxy or trifluoromethyl groups, an oxazolyl, isoxazolyl, thiazolyl...

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Bibliographic Details
Main Authors THONHOFER, KURT, AUER, EGMONT, WOERTHER, RUDOLF HELMUT, KORNTNER, HORST
Format Patent
LanguageFinnish
Published 08.11.1990
Edition5
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Summary:Process for the preparation of pure, unsymmetrically disubstituted ureas of the general formula I in which R denotes a phenyl radical which is unsubstituted, or monosubstituted or polysubstituted by halogen atoms or alkyl, alkoxy, aryloxy or trifluoromethyl groups, an oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, benzoxazolyl or benzothiazolyl radical which is unsubstituted, or monosubstituted or polysubstituted by halogen atoms or alkyl, alkoxy or trifluoromethyl groups and R1 and R2 independently of one another denote a hydrogen atom or an alkyl group, where R1 and R2 are not simultaneously hydrogen or R1 and R2 together denote a butylene or pentylene group, by reaction of an N-alkyl- or N,N-dialkylurea with an unsubstituted or substituted arylamine or a heterocyclic amine in the presence of that amine which is already present in the starting material, the respective N-alkyl- or N,N-dialkylurea.
Bibliography:Application Number: FI19900005532