PREPARATION OF 3,5-DIARYLPYRAZOLES

PREPARATION OF 3,5-DIARYLPYRAZOLES

A process for producing 3,5-diaryl pyrazolene of general formula (I), where R1 and R3 are possibly substituted aryl radicals, R2 is hydrogen, C1-C5 alkyl and possibly substituted aryl, in which hydrazine hydrate is reacted with 1,3 diaryl propenonene of general formula (II), where R1, R2 and R3 have...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: FRETSCHNER, ERICH, MERKLE, HANS RUPERT
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A process for producing 3,5-diaryl pyrazolene of general formula (I), where R1 and R3 are possibly substituted aryl radicals, R2 is hydrogen, C1-C5 alkyl and possibly substituted aryl, in which hydrazine hydrate is reacted with 1,3 diaryl propenonene of general formula (II), where R1, R2 and R3 have the above meanings, in sulphuric acid in the presence of iodine or an iodine compound.