GB1139310A - Anthraquinone dyes and their production - Google Patents

Abstract

1,139,310. Anthraquinone dyes. BADISCHE ANILIN- & SODA-FABRIK A.G. 6 May. 1966 [8 May, 1965], No. 20025/66. Heading C4P. The invention comprises anthraquinone dyes of the formula wherein Ar represents a substituted or unsubstituted aryl radical, the radicals R<SP>1</SP> and R<SP>2</SP> represent hydrogen atoms and/or alkyl, aralkyl, cycloalkyl, aryl or heterocyclic radicals which may bear OH, NH 2 , alkoxy or substituted amino groups, or together with the N atom form a heterocyclic ring, and n represents an integer from 1 to 4; with the proviso that groups in which R<SP>1</SP> represents H or a hydroxyalkyl group and R<SP>2</SP> represents H, C 1 to C 6 alkyl or hydroxyalkyl are excluded. They may be obtained by treating an anthraquinone compound of the formula wherein Ar<SP>1</SP> represents an unsubstituted or substituted aryl radical with chlorosulphonic acid or oleum and a halogenating agent and then treating the sulphochloride compound with at least a stoichiometric quantity of a compound of the formula Specified aryl radicals are phenyl, naphthyl and diphenyl radicals. The aryl radicals may bear halogen atoms, alkyl, alkoxy, aryloxy, acyl, hydroxy or acid groups. Examples are given for the production of the dyes. They are useful for dyeing or printing textile materials, and other natural or synthetic materials bright violet shades.