TRIPHENODIOXAZINE COMPOUNDS

摘要

A compound of formula (1) and salts thereof wherein W is Cl or Br; A is optionally substituted alkyl; each R independently is halogen, alkyl, alkoxy or carboxy; n is 0 or 1; a+b is 0 to 4; each X independently is O, S or NR<1> wherein R<1> is H or optionally substituted alkyl; B is a divalent organic linker group; and Z is an aromatic nitrogen ring heterocycle devoid of cellulose-reactive groups. It can be used as a dye for the coloration of cotton or paper.