Process for the preparation of alpha, omega-alkanedioic acids

US5202478A · kind A · utility

Assignee

• Chemie Linz Gesellschaft m.b.H. · AT

Inventors

• Karl Schermanz · Launsdorf, AT
• Manfred Schoftner · Linz, AT
• Engelbert Kloimstein · Eferding, AT
• Josef Schaller · Linz, AT
• Eduard Perndorfer · Traun, AT
• Klaus Reiter · Linz, AT
• Rudolf Neuhofer · Mittertreffling, AT

Key dates

• Filing date: Dec 12, 1990
• Grant date: Apr 13, 1993
• Expiry date: Dec 12, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/235
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the preparation of alpha, omega-alkanedicarboxylic acids of the general formula I ##STR1## in which A is an alkylene radical having 4-14 C atoms by reacting a cycloalkene of the general formula II ##STR2## in which A has the abovementioned meaning with ozone in the presence of an inert solvent, catalytically hydrogenating the peroxide solution formed, followed by oxidation of the dialdehyde formed to the diacid of the formula I in the presence of an inert aprotic solvent.