Preparation of disazo dye

Abstract

Abstract PURPOSE:To obtain in high yield and purity titled dye capable of coloring polyester fibers, etc. navy blue, by a coupling of a diazonium salt i.e. a diazo component derived from a heterocyclic amine to a second amine having a specific group to be eliminated. CONSTITUTION:An amine of formulaI{R<1>-R<3> are each H, halogen, nitro, lower alkyl; A is of formula II, III[R<7> is H, phenyl, lower alkyl; R<6> is cyano, nitro, lower alkoxycarbonyl; R<9> is H, lower alkyl, (substituted)phenyl]}(e.g. compound of formula IV) is made into its diazonium salt followed by a coupling to an aniline of formula V[X is carboxyl, hydroxymethyl, formyl, acetyl or sulfonic acid; R<4> is H, OH, methyl, Cl, or acylamino; R<5> and R<6> are each H, (substituted)alkyl, cyclohexyl, allyl](e.g. of formula VI) to obtain the objective dye of formula VII.

Inventors

• 👤 Toshio Niwa
• 👤 俊夫 丹羽
• 👤 Kiyoshi Himeno
• 👤 清 姫野
• 👤 Shuichi Maeda
• 👤 修一 前田
• 👤 Yukiharu Shimizu
• 👤 幸晴 清水

Bibliographic Details