Preparation of fluorophthalimides

US4680412A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Hamprecht · Weinheim, DE
• Juergen Varwig · Heidelberg, DE
• Wolfgang Rohr · Mannheim, DE

Key dates

• Filing date: May 31, 1984
• Grant date: Jul 14, 1987
• Expiry date: May 31, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D209/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Fluorophthalimides are prepared by a process in which a fluorophthalic anhydride is reacted, in the presence of an aliphatic sulfone, with from 0.4 to 0.8 mole of urea per mole of fluorophthalic anhydride, and the reaction is carried out first at 110.degree.-140.degree. C. and then at 150.degree.-170.degree. C.