O-amino (thio) phenolcarboxylic acids and their preparation

US5998662A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

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

Key dates

• Filing date: Sep 25, 1998
• Grant date: Dec 7, 1999
• Expiry date: Sep 25, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/68
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to novel o-aminophenolcarboxylic acids, and o-aminothiophenolcarboxylic acids of the following structure: ##STR1## where A.sup.1 to A.sup.7 are--independently of one another--H, F, CH.sub.3, CF.sub.3, OCH.sub.3, OCF.sub.3, CH.sub.2 CH.sub.3, CF.sub.2 CF.sub.3, OCH.sub.2 CH.sub.3 or OCF.sub.2 CF.sub.3, where at least one of the radicals A.sup.1 to A.sup.3 must be F or an F-containing group; T is O or S, and m is 0 or 1; and Z is a carbocyclic or heterocyclic aromatic radical.