Patent ID: 6514329
Filing Date: 2003-02-04
Classification: C09B,C09D

Abstract:
A mono-azo compound of Formula (1) or a salt thereof: wherein:A is N, Câ€”Cl, Câ€”CN or Câ€”NO2; R1 is H or optionally substituted alkyl; G is H, sulpho, carboxy, optionally substituted alkyl, optionally substituted alkoxy, â€”CF3, halo or â€”PO3H2; L1 and L2 each independently is â€”SR2, â€”OR3 or â€”NR4R5; R2, R3, R4 and R5 each independently is H, optionally substituted alkyl or optionally substituted aryl; or R4 and R5 together with the nitrogen to which they are attached form an optionally substituted five or six membered ring; provided that L1 and L2 are free from carboxy, sulpho and â€”PO3H2 groups.