3-cyano-2,6-diamino(4-sulfophenyl)-4-methyl pyridine 、
7-[[4-[(4-Amino-5-methoxy-2-methylphenyl)diazenyl]-5-methoxy-2-methylphenyl]diazenyl]naphthalene-1,3,6-trisulfonic acid 在
盐酸 、 sodium nitrite 、
lithium acetate 作用下,
以
水 为溶剂,
反应 3.75h,
以6%的产率得到7-[[4-[[4-[[5-Cyano-4-methyl-2,6-bis(4-sulfoanilino)pyridin-3-yl]diazenyl]-5-methoxy-2-methylphenyl]diazenyl]-5-methoxy-2-methylphenyl]diazenyl]naphthalene-1,3,6-trisulfonic acid