The present invention provides compounds having the formula:
in which R is hydrogen or C1-C4alkyl, preferably hydrogen and Y is hydrogen, C1-C4alkyl, C1-C4alkoxy, CF3, halogen (F, Cl, Br or I) or SO3M in which M is H, Na, K, Ca, Mg, ammonium, mono-, di-, tri- or tetra-C1-C4alkylammonium, mono-, di- or tri-hydroxyalkylammonium or ammonium that is di- or tri-substituted with a mixture of C1-C4alkyl and C1-C4hydroxyalkyl groups; a process for their production by partial dehydration of compounds having the formula:
; 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:
其中 R 是氢或 C1-C4烷基,最好是氢,Y 是氢、C1-C4烷基、C1-C4烷氧基、
CF3、卤素(F、Cl、Br 或 I)或 SO3M,其中 M 是 H、Na、K、Ca、Mg、
铵、单-、二-、三-或四-C1-C4烷基
铵、单-、二-或三-羟基烷基
铵或二-或三-取代有 C1-C4烷基和 C1-C4羟基烷基混合物的
铵;一种通过具有以下式子的化合物的部分脱
水来生产它们的工艺:
以及它们在生产不对称或对称
荧光增白剂中作为中间体的用途。