Direct dyes and composition comprising the dyes

A Compound according to the general structure

• wherein R1 is H, C1-C4 alkyl, C1-C4 hydroxyalkyl, COOH or COOR5 wherein R5 is C1-C4 alkyl, R2 is H or NR6R7 wherein R6 and R7 are same or different H, C1-C4alkyl, C1-C4 hydroxyalkyl or acetyl, R3 is H, OH, NR6R or NHSO2R8 wherein R8 is NR6R alkyl or NR6R hydroxyalkyl, R4 is H, COOH or COOR5 and
• Hy is a heterocyclic group which is bound at a C atom to the diazo group and which may be substituted or unsubstituted, and is selected from the group consisting of
• wherein R9 is C1-C4 alkyl or C1-C4 hydroxyalkyl and “*” expresses position at which group binds to the diazo group, R21 to R50 independently represent hydrogen atom or a substituent which is selected from halogen atom, alkyl group, aryl group, hetero-ring group, cyano group, hydroxyl group, nitro group, alkoxy group, aryloxy group, amino group (including anilino group), acylamino group, aminocarbonylamino group, alkoxycarbonylamino group, alkylsulfonylamino group, arylsulfonylamino group, alkylthio group, arylthio group, hetero-ring thio group, sulfamoyl group, alkylsulfonyl group, arylsulfonyl group, acyl group, alkoxycarbonyl group, and carbamoyl group;
• the substituent is halogen atom, alkyl group, cyano group, hydroxyl group, nitro group, alkoxy group, amino group (including anilino group), acylamino group, alkylsulfonylamino group, and carbamoyl group, “a, p, q, r, s” represent an integer of 0 to 4, “b, c” represent an integer of 0 to 6, “d, e, f, g, t, u” represent an integer of 0 to 3, “h, i, j, k, l, o” represent an integer of 0 to 2, “m” represent an integer of 0 to 1, when “a” to “u” represent an integer of 2 or more and may be the same or different to each other.