4-fluoro-3-bromo benzaldehyde acetals

US4845249A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rainer Fuchs · Halver, DE
• Fritz Maurer · Wuppertal, DE
• Uwe Priesnitz · Solingen, DE
• Hans-Jochem Riebel · Bad Camberg, DE
• Erich Klauke

Key dates

• Filing date: Mar 2, 1988
• Grant date: Jul 4, 1989
• Expiry date: Mar 2, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D317/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The new compound ##STR1## is prepared and converted to the new acetal ##STR2## which is reacted with an alkali phenolate or alkaline earth metal phenolate in the presence of copper or a copper compound as a catalyst and in the presence of a diluent at a temperature between about 100.degree. and 200.degree. C. to produce the new acetal ##STR3## which can be hydrolyzed to the corresponding aldehyde which is a known intermediate for pyrethroid-like insecticides.