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本文介绍了由双乙烯酮与无水乙醇在浓硫酸催化下酯化再精制制得乙酰乙酸乙酯,再和2,5-二氯-4-磺酸基苯肼磺酸钠盐经硫酸酸化成为硫酸盐进行缩合,制得1-(2’,5’-二氯-4’-磺酸基苯基)-3-甲基-5-吡唑啉酮。它是一个具有活泼亚甲基的化合物,可作为偶合组分和一些芳胺化合物的重氮盐进行偶合反应,形成带有偶氮基(-N=N-)的化合物。本文详细介绍1-(2’,5’-二氯-4’-磺酸基苯基)-3-甲基-5-吡唑啉酮可合成的酸性染料、活性染料及偶氮色淀类有机颜料的主要品种,列出了这些品种的化学结构式、CAS登录号、欧共体登记号、合成反应流程的方框示意图以及用途。
In this paper, ethyl acetoacetate prepared by esterification and re-purification of diketene and absolute ethyl alcohol in concentrated sulfuric acid is introduced. Then, the sodium salt of 2,5-dichloro-4-sulfophenylhydrazide sulfonic acid is acidified by sulfuric acid to form sulfuric acid Salt to yield 1- (2 ’, 5’-dichloro-4’-sulfophenyl) -3-methyl-5-pyrazolone. It is a compound with an active methylene group that can be coupled as a coupling component to a diazonium salt of some aromatic amine compound to form a compound with an azo group (-N = N-). This article details the synthesis of acid dyes, reactive dyes and azo lakes of 1- (2 ’, 5’-dichloro-4’-sulfophenyl) -3-methyl-5-pyrazolone The main varieties of organic pigments list the chemical structures of these varieties, the CAS registry number, the European Community registration number, the block schematic of the synthesis reaction scheme, and their uses.