PREPARATION OF N-ARYL- AND N-HETARYLHYDROXYLAMINES

摘要

A process for producing aromatic or heteroaromatic hydroxylamines of the general formula (I) in which R1 is an unsubstituted or substituted aryl radical or an unsubstituted or substituted hetaryl radical from the pyridine or quinoline group, by hydration of nitro compounds of the general formula (II) R1-NO2 in which R1 has the above meaning, in the presence of a platinum catalyst on an active carbon carrier or in the presence of a sulphur or selenium-doped palladium catalyst on an active carbon carrier, process in which the reaction is conducted in the presence of a morpholine compound substituted at the nitrogen atom of the general formula (III) in which R2 are alkyl radicals with 1 to 5 carbon atoms and R3 to R10 are hydrogen atoms or alkyl radicals with 1 to 5 carbon atoms.