申请人:Produits Chimiques Ugine Kuhlmann
公开号:US04126610A1
公开(公告)日:1978-11-21
A process for preparing a cyano-azo dyestuff which is insoluble in water and has the formula: (CN).sub.n -- A -- N .dbd. N -- B (I) starting with a halogen-azo compound of formula: (Hal).sub.n -- A -- N .dbd. N -- B (II) in which A denotes a benzenoid group containing a nitrile or halogen substituent(s) in ortho position with respect to the azo group; Hal represents an atom of halogen, and preferably bromine or chlorine; B denotes the radical of a coupling compound; and preferably a substituted para-aminoarylene radical; A and B are devoid of groups which confer solubility in water and may contain other substituents such as halogen, alkyl, alkoxy, aryl, aralkyl, nitro, cyano, trifluoroalkyl, sulfonyl, acylamino, acyl, secondary or tertiary amino, or an ester of a carboxylic acid; And n is 1 or 2, wherein a compound of formula (II) is reacted with an alkali cyanide, preferably sodium cyanide, in the presence of water, and further in the presence of a solvent formed by a sulfide of formula: NC -- R -- S -- (R').sub.m -- CN (III) where R and R', which may be the same or different, denote an alkylene radical having from 1 to 6 carbon atoms and having a straight or branched chain which may contain --O-- or --S-- bridge; m is 0 or 1; and in the presence of a catalyst constituted by a molecular combination between the sulfide of formula (III) and a cuprous salt.
一种制备不溶于水的氰基-偶氮染料的方法,其化学式为:(CN).sub.n -- A -- N.dbd.N -- B (I),起始物为一种卤素-偶氮化合物,其化学式为:(Hal).sub.n -- A -- N.dbd.N -- B (II),其中A表示含有苯环基团,该基团在偶氮基团的正交位上含有腈或卤素取代基;Hal代表卤素原子,最好是溴或氯;B表示偶联化合物的基团,最好是取代的对氨基芳基烷基基团;A和B不含有使其溶于水的基团,可以含有其他取代基,如卤素,烷基,烷氧基,芳基,芳基烷基,硝基,氰基,三氟甲基,磺酰基,酰胺基,酰基,二级或三级氨基,或羧酸酯;n为1或2,其中化合物(II)与碱性氰化物反应,最好是氰化钠,在水的存在下,并在式为:NC--R--S--(R').sub.m--CN (III)的硫化物溶剂的存在下进行,其中R和R',可以相同也可以不同,表示具有1至6个碳原子的烷基,具有直链或支链,可以含有--O--或--S--桥;m为0或1;并在由式为(III)的硫化物和铜盐的分子组合形成的催化剂的存在下进行。