PURPOSE: To obtain a new compound, excellent in solubility and useful as a water-soluble black dye for inks, textile materials, etc.
CONSTITUTION: A compound expressed by formula I [Q1 is (substituted)phenylene or naphthylene; Q2 is (substituted)phenyl or naphthyl; Z is SO2CH2-CH2OH or SO2CH2CH2SO3H; L is 0 or 1], e.g. a compound expressed by formula II. Furthermore, the compound expressed by formula I is obtained by converting a compound expressed by formula III into a tetrazonium derivative, coupling the resultant compound in the form of a free acid with a compound expressed by formula IV under acidic conditions in an aqueous medium, affording a diazonium compound, diazotizing a compound expressed by formula V, coupling the prepared compound with the above-mentioned diazonium compound in a neutral or weak alkaline aqueous medium and coupling the resultant compound with a compound expressed by the formula Q2-H in a weak alkaline aqueous medium.
AKAHORI KINGO
HARADA NAOKI
KASHIWANE YUTAKA
KAWASHITA HIDEO
OTA MITSUHIRO
TAOKA CHEMICAL CO LTD