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    • 5. 发明授权
    • Process for the preparation of cationic dyestuffs
    • 阳离子染料的制备方法
    • US4281112A
    • 1981-07-28
    • US169582
    • 1980-07-17
    • Klaus-Friedrich LehmentRoderich RaueHarald Gleinig
    • Klaus-Friedrich LehmentRoderich RaueHarald Gleinig
    • C09B26/02C09B26/04C09B44/00C07D209/14
    • C09B44/005C09B26/04
    • The preparation of hydrazone dyestuffs of the formula ##STR1## wherein R.sup.13 and R.sup.14 independently of one another represent hydrogen, C.sub.1 -- to C.sub.4 --alkyl, C.sub.1-- to C.sub.4-- alkoxy or halogen, in particular chlorine or bromine, andA.sup.- denotes an anionic radical,by reacting azo bases of the general formula ##STR2## wherein R.sup.13 and R.sup.14 have the above mentioned meaning andR.sup.15 represents hydrogen or the methyl group, with dimethyl sulphate in a mixture of water and an organic solvent and in the presence of an acid-binding agent, is characterized in that (a) aromatic or aliphatic chlorinated hydrocarbons are used as the organic solvents, (b) the reaction is carried out at a temperature of 10.degree.-60.degree. C., (c) a 5-90% excess of dimethyl sulphate is employed and (d) the reaction is allowed to proceed at a pH of 5-10.
    • 其中R 13和R 14彼此独立地表示氢,C 1至C 4 - 烷基,C 1至C 4 - 烷氧基或卤素,特别是氯或溴的式腙染料的制备,A - 表示阴离子 其中R 1和R 14具有上述含义并且R 15表示氢或甲基的偶氮碱与水和有机溶剂的混合物中的硫酸二甲酯反应, 其特征在于使用(a)芳族或脂族氯代烃作为有机溶剂,(b)反应在10〜60℃进行,(c)5-90 使用过量的过硫酸二甲酯,(d)使反应在5-10℃的pH下进行。