发明授权
US5364413A 3-substituted para-aminophenols, process for preparing them, their use for dyeing keratinous fibres and the intermediate compounds used in the preparation process 失效
3-取代对氨基苯酚,其制备方法,用于染色角质纤维的用途和制备过程中使用的中间体化合物

3-substituted para-aminophenols, process for preparing them, their use
for dyeing keratinous fibres and the intermediate compounds used in the
preparation process
摘要:
3-Substituted para-aminophenols, process for preparing them, their use for dyeing keratinous fibres and the intermediate compounds used in the process of preparation.3-Substituted para-aminophenols, of general formula: ##STR1## where X.dbd.H, halogen; Y.dbd.O--, --S--; R.dbd.alkyl, hydroxyalkyl, C.sub.1-4 aminoalkyl or C.sub.3 -C.sub.6 polyhydroxyalkyl;with the proviso that, when X.dbd.H, R is not methyl, and when X.dbd.H and Y.dbd.O, R is not ethyl;process #or preparing them, intermediate compounds of formula: ##STR2## where X.sup.1 .dbd.halogen, Y and R have the meaning stated above; with the proviso that, when Y.dbd.O, R is not methyl, and when R.dbd.aminoalkyl, X.sub.1 can also denote hydrogen;dyeing compositions containing one or more compounds of formula (I), and a process for dyeing human hair.
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