1. Using 3,3′-dichloro benzidine and acetoacetanilide as raw materials, C.I. pigment yellow 12 was synthesized by diazotization and coupled reaction.
   以3，3′-二氯联苯胺、乙酰乙酰苯胺为原料，经重氮化、偶合反应合成了C．I．颜料黄12。
2. 4. Using 3,3′-dichloro benzidine and acetoacetanilide as raw materials, C. I. pigment yellow 12 was synthesized by diazotization and coupled reaction.
   以3，3′-二氯联苯胺、乙酰乙酰苯胺为原料，经重氮化、偶合反应合成了C．I．颜料黄12。收藏指正

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