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专利名称：One pot diazotization, coupling and
quaternization of aminotriazoles
发明人：Hans-Peter Kuhlthau申请号：US06/2390申请日：19810223公开号：US04392998A公开日：19830712
摘要：In the preparation of a quaternized dyestuff of the formula ##STR1## in whichR.sup.1 and R.sup.2 each is an optionally substituted alkyl, alkenyl or aralkyl radical,
R.sup.3 is hydrogen, or an optionally substituted alkyl, aralkyl, cycloalkyl or arylradical, < P>< P> K is the radical of a coupling component+HK, and X is an anion,
< P> wherein an aminotriazole of the formula ##STR2## is diazotized and coupled toa coupling component HK to form an intermediate dyestuff of the formula ##STR3## andthe intermediate dyestuff is quaternized with an alkylating or aralkylating agent capableof providing the radicals R.sup.1 and R.sup.2 in a medium also providing the anion X.sup.-,the improvement which comprises effecting the coupling at a pH of 4 to 6 and thereafter,without isolation of the intermediate dyestuff, effecting the quaternization.
申请人：BAYER AKTIENGESELLSCHAFT
代理机构：Sprung, Horn, Kramer & Woods
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