Patent ID: 6342326
Filing Date: 2002-01-29
Classification: C07H,C09B

Abstract:
An activated dye having a formula: wherein:each dotted line represents carbon atoms necessary to form a fused substituted or unsubstituted aromatic ring; n is an integer selected from the group consisting of 1, 2 and 3; X and Y are selected from the group consisting of S, O, N, CH2 and C(CH3)2; at least one of said R1 and R2 comprises a sulfonic acid or sulfonate group attached to the aromatic ring; and R3 and R4 are independently selected from the group consisting of alkylcarboxylate, activated alkylcarboxylate and an inert group; wherein at least one of said R3 and R4 groups is alcylcarboxylate or activated alkylcarboxylate with a carboxyl group converted to an acyl fluoride, and wherein said inert group is a group that is inert towards acyl fluoride and has a sterical structure which allows aminoacylation of the acyl fluoride group.