申请人:Ciba Specialty Chemicals Corporation
公开号:US05902909A1
公开(公告)日:1999-05-11
The present invention provides compounds having the formula: ##STR1## in which R is hydrogen or C.sub.1 -C.sub.4 alkyl, preferably hydrogen and Y is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, CF.sub.3, halogen (F, Cl, Br or I) or SO.sub.3 M in which M is H, Na, K, Ca, Mg, ammonium, mono-, di-, tri- or tetra-C.sub.1 -C.sub.4 alkylammonium, mono-, di- or tri-hydroxyalkylammonium or ammonium that is di- or tri-substituted with a mixture of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 hydroxyalkyl groups; a process for their production; and their use as intermediates in the production of asymmetric or symmetric fluorescent whitening agents.
本发明提供具有以下式子的化合物:##STR1##
其中R为氢或C.sub.1-C.sub.4烷基,优选氢,Y为氢,C.sub.1-C.sub.4烷基,C.sub.1-C.sub.4烷氧基,CF.sub.3,卤素(F、Cl、Br或I)或SO.sub.3M,其中M为H、Na、K、Ca、Mg、铵、单、二、三或四C.sub.1-C.sub.4烷基铵、单、二或三羟基烷基铵或二或三取代于混合C.sub.1-C.sub.4烷基和C.sub.1-C.sub.4羟基烷基的铵;一种制备它们的方法;以及它们作为不对称或对称荧光增白剂生产中间体的用途。