GB1122164A - Reactive dyestuffs containing 2-sulphonyl-4-pyrimidinyl carbonyl radicals - Google Patents

Abstract

The invention comprises reactive dyestuffs of the general formula <FORM:1122164/C4-C5/1> wherein F is an organic dyestuff radical; m is 1 to 4; X is a sulphonyl radical capable of being split off (i.e. a sulphonyl radical which is reactive with hydroxyl or amide groups of fibre material and by splitting off forms a covalent linkage between the hetero ring and the fibre, e.g. methyl or ethyl sulphonyl); Y and Z are H or a substituent atom or group; and R is H, C1-C5 alkyl, aralkyl, cycloalkyl or aryl. Radical F may be directly linked to the amide nitrogen atom or indirectly thereto by a divalent bridging group which may contain N, O or sulphur, and azo groups. Radical F which preferably contains one or two sulphonic acid groups may be a mono-, di- or polyazo radical which may be metallized or an anthraquinone, stilbene or phthalocyanine radical. The dyes are prepared reacting a dyestuff or dyestuff intermediate containing a group -NHR (R being as defined above) with an appropriate pyrimidine carboxylic acid halide in organic, organic-aqueous or aqueous medium at -10-80 DEG C., optionally in presence of alkaline condensation agents, e.g. pyridine, alkali metal carbonate or hydroxide, and when intermediates are used the final product may be obtained by diazotization and coupling metallization, acylation, reduction or sulphonation. Many examples are given and the dyes dye hydroxyl group containing materials, e.g. regenerated cellulose and nitrogen containing materials, e.g. wool, silk, and synthetic polyamides and polyurethanes fibres in all shades.