PRODUCTION OF DIFLUORONITROANILINE

PURPOSE:To obtain the subject compound useful as an intermediate for precise chemicals such as agricultural chemicals, medicines or dyes in good yield by reacting 2,4-difluoroaniline with nitric acids. CONSTITUTION:2,4-Difluoroaniline is allowed to react with nitric acids such as nitric acid, fuming...

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Bibliographische Detailangaben
Hauptverfasser:	NASU RIKUO, HAMAGUCHI MOTOHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain the subject compound useful as an intermediate for precise chemicals such as agricultural chemicals, medicines or dyes in good yield by reacting 2,4-difluoroaniline with nitric acids. CONSTITUTION:2,4-Difluoroaniline is allowed to react with nitric acids such as nitric acid, fuming nitric acid or mixed acid of concentrated nitric acid and concentrated sulfuric acid in an amount of 0.9-1.5mol, preferably 0.95-1.05mol based on 1mol 2,4-difluoroaniline to afford the objective compound. The aforementioned reaction is preferably carried out at -10 to -30 deg.C temperature for 0.5-2 hr. Furthermore, urea in an amount of 0.05-0.30mol, preferably 0.10-0.20mol, based on 1 mol raw material compound is present to remarkably improve the production ratio of the objective compound.