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CAS号[22578-86-5]合成工艺 - C.I. 分散蓝281

【CAS名】Acetamide, N-[2-[(2-bromo-4,6-dinitrophenyl)azo]-5-[(2-cyanoethyl)ethylamino]-4-methoxyphenyl]-

【结构式】略

【分子式/分子量】C20H20BrN7O6 = 534.33

【用途】涤纶及其混纺织物的染色

 

资料I[J] 华东化工学院学报, 1988, 14(1): 59-64. 此刊物本人未收藏,所以无法抄录。

 

资料II[M] Peters Freeman: “Colour Chemistry”, 1991, P.153. 此书上海染料研究所有收藏,以下为本人以前的抄录文。(其中化合物CAS号为本人所加)

Preparation of Disperse Blue 281.

【反应式】略

A solution of nitrosyl sulfuric acid ([7782-78-7],已在2019年6月17日上网) (prepared by dissolving 8.0g sodium nitrite in 150g concentrated sulfuric acid) was cooled to 20°C. and 26.3g 6-bromo-2,4-dinitroaniline [1817-73-8] (0.1 mol.) added.  The diazonium mixture was stirred at 15-20°C for 2 h and added to a solution of 25..9g 3-N-β-cyanoethyl-N-ethyl-4-methoxyacetanilide [19433-94-4] (0.1 mol/L) in 60g acetic acid, 167g water and 194g ice and the mixture stirred for 1 h at 0-5°C.  The coupling mass was neutralized to pH 7.0 with caustic soda, heated to 90°C and held for 1h. The separated dye was filtered and the cake washed sulfate free.

The yield was 47.7g (90% of the theoretically calculated value).

 

资料III肖刚、杨新玮等主编《世界染料品种-2005年》,全国染料工业信息中心出版,P. 601,C.I.分散蓝281。

资料译自Colour Index,文献中只有华东化工学院学报。

 

资料IV何岩彬主编《染料品种大全》,沈阳出版社出版,2018年,P.937,C.I.分散蓝281,资料译自Colour Index,文献中只有华东化工学院学报。

 

陈忠源 2022年5月29日,星期日



文章作者:陈忠源