Process for the preparation of fluorine-substituted aminobenzodioxoles and -benzodioxanes and new intermediates

US5670665A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Andres · Ginsheim-Gustavsburg, DE
• Albrecht Marhold · Leverkusen, DE

Key dates

• Filing date: Jun 17, 1996
• Grant date: Sep 23, 1997
• Expiry date: Jun 17, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D317/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

According to the invention, a new process for the preparation of fluorine-substituted aminobenzodioxoles and -benzodioxanes of the formula (I) ##STR1## in which n represents an integer 1 or 2, has been found, in which fluorine-substituted nitro-halogeno-benzodioxoles and -benzodioxanes, which are likewise new, are hydrogenated. The novel intermediates are obtained from fluorine-substituted benzodioxoles and benzodioxanes by halogenation and subsequent nitration. The amino compounds are important starting materials for highly active biocides.