Process for the preparation of 2-amino-5-acylamino phenols and starting compounds suitable therefor

US4873338A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Heinz Wiesen · Euskirchen, DE
• Erich Wolff · Solingen, DE

Key dates

• Filing date: Nov 23, 1987
• Grant date: Oct 10, 1989
• Expiry date: Nov 23, 2007

Classification

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

Abstract

Compounds corresponding to Formula I ##STR1## wherein R.sup.1 denotes an acyl group and PA0 X denotes hydrogen, halogen, alkoxy, aroxy, SO.sub.3 H or a heterocyclic group attached through --O-- or --N< are prepared form a compound corresponding to Formula II ##STR2## wherein X has the meaning already indicated and Q denotes the group required for completing a dicarbonimide ring by reduction of the said compound to the amino compound and acylation into a compound corresponding to Formula III ##STR3## wherein X, Q and R.sup.1 have the meanings indicated followed by conversion of the compound corresponding to Formula III into a compound corresponding to Formula I by hydrazinolytic or hydrolytic decomposition of the dicarbonimide ring.