Derivatives of 2,2-dihalogenobenzo[1,3]dioxoles substituted in the 4-position, processes for their preparation and their use

US5281725A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

• Filing date: Sep 28, 1992
• Grant date: Jan 25, 1994
• Expiry date: Sep 28, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D317/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

New 2,2-dihalogeno-benzo[1,3]dioxoles substituted in the 4-position, of the general formula (I) ##STR1## in which R represents fluorine, chlorine, bromine or nitro and PA1 Hal represents chlorine or fluorine, and their use as starting substances for the synthesis of highly active compounds, for example in the field of plant protection and pharmaceuticals. The compounds of the formula (I) can be prepared by analogous processes, for example by chlorination from corresponding benzo[1,3]dioxoles substituted in the 4-position, and these substances according to the invention can be further reacted with hydrogen fluoride to give substances to which the invention likewise relates.