Cationic 1,3,4-thiadiazole dyestuffs

US5208325A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Klaus Leverenz · Leverkusen, DE

Key dates

• Filing date: Dec 11, 1991
• Grant date: May 4, 1993
• Expiry date: Dec 11, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B44/107
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cationic 1,3,4-thiadiazole dyestuff of the formula ##STR1## in which PA1 R.sup.1 and R.sup.2, independently of one another, denote hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl, a heterocycle, said heterocycle having a direct bond to the nitrogen atom, or being bound through a methylene or ethylene group, or R.sup.1 and R.sup.2, together with the nitrogen atom to which they are attached form a heterocycle, PA1 R.sup.3 denotes alkyl, alkenyl or aralkyl, PA1 R.sup.4 denotes hydrogen or alkyl, PA1 R.sup.5 denotes acyl, PA1 R.sup.6 and R.sup.7, independently of one another, denote hydrogen, alkyl, alkoxy, aryloxy or halogen and PA1 R.sup.8 and R.sup.9, independently of one another, denote hydrogen, alkyl, alkenyl, cycloalkyl, aralkyl, aryl, a heterocycle, said heterocycle having a direct bond to the nitrogen atom, or being bound through a methylene or ethylene group, or R.sup.8 and R.sup.9, together with the nitrogen atom to which they are attached form a heterocycle, or PA1 R.sup.6 and R.sup.8 together with the nitrogen to which R.sup.8 is attached completes a heterocyclic, said R.sup.6 and R.sup.8 having a total of from 2 to 4 atoms, one of which can be oxygen or nitrogen, said…