US 4,361,521 A · Difluorophthaloyl fluoride

Abstract

A novel fluorinated aromatic compound, 4,5-difluorophthaloyl fluoride, is prepared by reacting 4,5-dichlorophthalic anhydride with a stoichiometric excess of potassium fluoride.

Claims1

Dependent claims

4,5-difluorophthaloyl fluoride.

Dependencies are inferred from the claim text.

Facts

Application

06/228,656Filed 26 Jan 1981

Granted

30 Nov 1982

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C07D 209/48
Iso-indoles; Hydrogenated iso-indoles: with oxygen atoms in positions 1 and 3, e.g. phthalimide
C07C 51/567
Preparation of carboxylic acid anhydrides: by reactions not involving carboxylic acid anhydride groups
C07C 51/60
Preparation of carboxylic acid halides: by conversion of carboxylic acids or their anhydrides or esters, lactones, salts into halides with the…
C07C 63/68
Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings: containing halogen

Abstract

A novel fluorinated aromatic compound, 4,5-difluorophthaloyl fluoride, is prepared by reacting 4,5-dichlorophthalic anhydride with a stoichiometric excess of potassium fluoride.

Difluorophthaloyl fluoride

Life of this patent

Abstract

Claims1

Difluorophthaloyl fluoride

Life of this patent

Abstract

Claims1