GB1078092A - Anthraquinone dyestuffs - Google Patents

Abstract

The invention comprises anthraquinone dyestuffs of the formula <FORM:1078092/C4-C5/1> wherein W represents -NH- or -S-; R represents a hydroxyalkyl or hydroxyalkoxyalkyl radical; and X1, X2 and X3 each independently represent a hydrogen atom or an amino, a -NHCOY, a -NHY or a <FORM:1078092/C4-C5/2> group, wherein Y represents an alkyl or aryl radical. The dyestuffs may be made by esterifying a compound of the formula <FORM:1078092/C4-C5/3> where Z1, Z2 and Z3 represent the same groups as X1, X2 and X3, except that -W-phenylene-COOH replaces the corresponding ester, with a glycol of the formula ROH. Alternatively the carboxylic acid may be converted to the acid chloride and then reacted with the glycol. A further method comprises reacting the above intermediate (where Z1, Z2 and Z3 are other than amino or -NHY) with R-hal, where "hal" is a chlorine or bromine atom. The dyes may also be made by reacting <FORM:1078092/C4-C5/4> where "hal" is chlorine or bromine and T1, T2 and T3 represent a H, Cl, Br, -NHY or -NHCOY with HW.C6H4.COOR. Alternatively a compound similar to the preceding formula but with "hal" replaced by -WH and the T radicals replaced by L1, L2 and L3 which represent H, -NHCOY or -WH, is reacted with hal-C6H4-COOR. The intermediates of second general formula above may themselves be obtained by condensing the appropriate chloro- or bromo-anthraquinone compound with a carboxylic acid HW.C6H4.COOH.