1: o-tolidine-6,6'-disulfonic acid; 2-methoxy-4nitro-aniline With hydrogenchloride; sodium nitrite in water T=10°C; 1 h; 2: aceto-acetyl-amino-2-methoxy-benzene With sodium hydroxide; sodium acetate; acetic acid in water T=25 - 90°C; pH=6; 150 h;
参考文献
Sanyo Color Works, Ltd.
Patent: EP1424370 A1, 2004 ;
Location in patent: Page 10 ;