咪唑 、 N-[5-(二乙基氨基)-2-[(2,4-二硝基苯基)偶氮]苯基]乙酰胺 以was produced in addition to the desired 3-acetylamino-4-(2'-cyano-4',6'-dinitrophenylazo)-N,N-diethylaniline的产率得到N-[2-[(2-氰基-4,6-二硝基苯基)偶氮]-5-(二乙基氨基)苯基]-乙酰胺
A new synthetic strategy for industrially important deep-shade disperse azo dyes was presented in this study. The key procedure is to prepare stable solid diazonium salts of weakly basic amines in the absence of concentrated sulfuric acid. Diazotization by tert-butyl nitrite in ethylacetate was allowed to proceed in the presence of equivalent 1,5-naphthalenedisulfonic acid as stabilizer of diazonium
Process for the manufacture of aromatic nitriles by reacting an aromatic halogen compound with formaldoxime in the presence of a copper catalyst and an acid-binding agent, preferably a tertiary amine. Particularly applicable to replacement of halogen ortho to the azo linkage of an azo dyestuff by cyano.