3-substituted para-amino phenols and their use as oxidation dye precursors in compositions for dyeing kerafinous fibers
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United States of America Patent
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Jan 28, 1992
Grant Date -
N/A
app pub date -
Feb 28, 1989
filing date -
Mar 3, 1988
priority date (Note) -
Expired
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Abstract
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 for preparing them, intermediate compounds of formula: ##STR2## where X.sub.1 =halogen, Y and R have the meaning stated above; with the proviso that, when Y.dbd.O, R is not methyl, and when R=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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