New redox indicators

US4966855A · kind A · utility

Assignee

• Boehringer Mannheim GmbH · DE

Inventors

• Ulfert Deneke · Fürth, DE
• Werner Guthlein · Mannheim, DE
• Wolfgang Weckerle · Grünstadt, DE
• Hans Wielinger · Weinheim, DE

Key dates

• Filing date: Jul 2, 1985
• Grant date: Oct 30, 1990
• Expiry date: Jul 2, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/206664
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention provides new redox indicators and uses for these redox compounds (I): ##STR1## Wherein X is oxygen or sulphur, R.sub.1 is julolidine or tetrahydroquinoline, which can carry an alkyl radical on the nitrogen atom which, in turn, can be substituted by a sulphuric, phosphonic or carboxylic acid residues, or is (II); wherein R.sub.4 is hydroxyl or a mono- or dialkylated amino group, R.sub.5 and R.sub.6, which can be the same or different, are hydrogen, alkyl or alkoxy, R.sub.2 is hydrogen or alkyl, julolidine or tetrahydroquinoline, which can carry an alkyl on the nitrogen atom which alkyl can be substituted by sulphuric, phosphonic or carboxylic acids, or is III; wherein R.sub.5 and R.sub.6 are the same as in R.sub.1 and R'.sub.4 is hydroxyl, an amino or a mono-or dialkylated amino group, whereby the alkyl radicals can be substituted one or more times by hydroxyl, alkoxy, halogen, morpholine or a sulphuric, carboxylic or phosphonic acid residue, which acids can also be esterified, and R.sub.3 is the same as R.sub.2 or is an alkyl substituted by hydroxyl, alkoxy, dialkylamino or phenyl, or is cycloalkyl, phenyl or pyridyl; as well as the salts thereof.