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2,4,6-三氯苯肼与β-乙氧基-β-亚氨基-丙酸乙酯在乙醇钠的存在下,经缩 合成环生成1-(2＇,4＇,6＇-三氯苯基)-3-氨基-5-吡唑啉酮(3)．3和它的4-位衍 生物与甲基丙烯酰氯反应生成了三种可聚合的成色剂单体．将这些单体与丙烯酸丁 酯共聚得到了三种乳液聚合型品红成色剂．给出了合成反应中间体及单体的红外光 谱与核磁共振光谱数据,讨论了影响合成反应及乳液聚合反应的一些因素．
l-(2',4',6'-Trichlorophenyl)-3-amino-5-pyrazolone (3) was synthesized by the condensation of 2,4,6-trichlorophenyl-hydrazine with ethyl β-ethoxy-β-imino-propinate in the presence of sodium ethoxide. Three monomers of the couplers were obtained by the reaction of 3 or its 4-position derivatives with methacryloyl chloride. Three latex magenta couplers were formed by emulsion copolymerization of these monomers and butyl acrylate. The reaction intermediates and the monomers were characterized by IR and ' H NMR spectra. Some factors of affecting the reactions mentioned above were discussed.
