Abstract:
Production of 4-chloro-6,7-phthaloylquinazoline derivatives by reaction of 2-acylamino-3-cyanoanthraquinones with hydrogen chloride and phosgene in the presence of N,N-dialkyl carboxylic amides. The 4-chloro-6,7-phthaloylquinazoline derivatives are valuable dyestuff intermediates.
Abstract:
THIS SPECIFICATION DISCLOSES THE PRODUCTION OF SULFONATED AMINOANTHRAQUINONES BY THE ACTION OF OLEUM ON N-CYCLOHEXYLAMINOANTHROANTHRAQUINONES AT A TEMPERATURE OF FROM 50 TO 160*C. AMINOANTHRAQUINONES ARE VALUABLE INTERMEDIATES FOR THE PRODUCTION OF DYESTUFFS.
Abstract:
Reactive dyes of the formula where n is 1 or 2, X is a six-membered halogen-containing nitrogen heterocycle, L1, depending on n, is fluorine, chlorine, C1-C4-alkoxy, phenoxy, C1-C4-alkyl, substituted or unsubstituted phenyl or a bridge member which has one or two hydroxysulfonyl groups, D is the radical of a diazo component of the aniline or naphthalene series which has at least one hydroxysulfonyl group, L2 is hydrogen or substituted or unsubstituted C1-C8-alkyl, L3 is the cationic radical of an aromatic heterocycle which is linked to the pyridone ring via a nitrogen atom, and L4 is hydrogen or C1-C4-alkyl, with the proviso that the number of hydroxysulfonyl groups in the molecule exceeds that of the cationic groups by at least one, are useful for dyeing and printing hydroxyl- or nitrogen-containing substrates.