Diazotype materials with 2-hydroxy-naphthalene having sulfonamide substituent as coupler

US4492749A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventor

• Siegfried Scheler · Wiesbaden, DE

Key dates

• Filing date: Sep 15, 1983
• Grant date: Jan 8, 1985
• Expiry date: Sep 15, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/58
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to a derivative of 2-hydroxy-naphthalene of the general formula ##STR1## wherein A is ##STR2## and X is --OH or ##STR3## and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are identical or different and are hydrogen, cycloalkyl having up to eight carbon atoms, which is optionally substituted by lower alkyl groups, aralkyl having up to 10 carbon atoms or aryl which is substituted by lower alkyl, lower alkoxy, halogenalkyl or alkyl-substituted amino groups or by halogen, or R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4 in each case are, conjointly with the nitrogen atom to which they are attached, identical or different heterocyclic groups which are optionally substituted by lower alkyl.