Monoazo compounds and dyeing or printing process for fiber materials using them

A monoazo compound represented by the general formula (I):

• ##STR215## wherein A represents alkylene which may be substituted or a group:
• --(CH.sub.2)m--Q.sup.1 --(CH.sub.2)n--
• wherein Q.sup.1 is --O--, --S-- or --NR.sup.3 --, m and n are, independently of each other, 2, 3 or 4 and R.sup.3 is hydrogen, alkyl which may be substituted or phenyl which may be substituted;
• B represents .beta.-carboxyvinyl, alkyl which may be substituted or phenyl which may be substituted;
• D represents a group of the formula (II):
• ##STR216## wherein * represents a bond connecting to the azo group in the formula (I), R.sup.4 is hydrogen, methyl or methoxy and p is 0 or 1;
• X represents a group of the formula (III) or (IV):
• ##STR217## wherein R.sup.5 and R.sup.6 are, independently of each other, hydrogen, alkyl which may be substituted, phenyl which may be substituted or naphthyl which may be substituted, r is
• 1. 2 or 3, Q.sup.2 is --O--, --S--, --CH.sub.2 --, --SO.sub.2 -- or --NR.sup.7 -- in which R.sup.7 is hydrogen or alkyl which may be substituted;
• R.sup.1 and R.sup.2 are, independently of each other, hydrogen or alkyl which may be substituted;
• and
• Y is a group:
• --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Z
• wherein Z is the radical of a sulfate ester, a thiosulfate ester, a phosphate ester or an acetate ester, or a halogen atom;
• or a salt thereof.