O-amino(thio)phenolcarboxylic acids, and their preparation

US6310238A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Recai Sezi · Simmerath, DE
• Michael Keitmann · Weisendorf, DE

Key dates

• Filing date: Sep 24, 1998
• Grant date: Oct 30, 2001
• Expiry date: Sep 24, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C217/90
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to novel o-aminophenolcarboxylic acids or o-aminothiophenolcarboxylic acids of the following structure ##STR1## in which: PA1 A.sup.1 to A.sup.7 are--independently of one another--H, CH.sub.3, OCH.sub.3, CH.sub.2 CH.sub.3 or OCH.sub.2 CH.sub.3 ; PA1 T is O or S, and m is 0 or 1; PA1 Z is a carbocyclic or heterocyclic aromatic radical.