Asymmetric dioxazine compounds and use thereof as fiber reactive dyes

An asymmetric dioxazine compound represented in a free acid form by the following formula (I):

• ##STR102## wherein R is sulfo;
• R.sub.1 is hydrogen;
• R.sub.2 is hydrogen;
• R.sub.3 is hydrogen;
• X.sub.1 and X.sub.2 independently of one another are each halogeno;
• Y is a group represented by the following formula (1), (3) or (4):
• ##STR103## in which R.sub.5 is hydrogen or unsubstituted or substituted lower alkyl;
• W is straight or branched C.sub.1 -C.sub.5 alkylene;
• R.sub.6 is selected from the group consisting of hydrogen, halogeno, hydroxy, sulfato, carboxy, cyano, C.sub.1 -C.sub.4 alkylcarbonyloxy, C.sub.1 -C.sub.4 alkoxycarbonyl, carbamoyl and --SO.sub.2 Z;
• Z is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Z.sub.1 in which Z.sub.1 is a group capable of being split by the action of an alkali;
• R.sub.4 is hydrogen, unsubstituted or substituted lower alkyl or a group represented by the following formula:
• ##STR104## in which W and Z are as defined above;
• W.sub.1 and W.sub.2 independently of one another are each straight or branched C.sub.2 -C.sub.6 alkylene;
• and p is an integer of 1 to 6;
• and
• Q is a group represented by the following formula (5):
• ##STR105## in which R.sub.7 is hydrogen, methyl or ethyl;
• R.sub.8 is phenyl unsubstituted or substituted with at least one member selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, sulfo, carboxy and chloro;
• or Q is a group represented by the following formula:
• ##STR106## in which R.sub.10 is hydrogen or C.sub.1 -C.sub.4 alkyl;
• A is m- or p-phenylene unsubstituted or substituted with at least one member selected from the group consisting of methyl and methoxy;
• and Z.sub.2 is (--CH.dbd.CH.sub.2) or --CH.sub.2 CH.sub.2 Z.sub.3 in which Z.sub.3 is a group capable of being split by the action of an alkali.