Primary intermediates for oxidative coloration of hair
Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): 1 wherein R 1 and R 2 are each independently selected from hydrogen atoms, a C 1 to C 5 alkyl or hydroxyalkyl group, or R 1 and R 2 together with the nitrogen atom to which they are at...
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| Main Authors | , |
|---|---|
| Format | Patent |
| Language | English |
| Published |
17.10.2002
|
| Online Access | Get full text |
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| Summary: | Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1):
1
wherein R
1
and R
2
are each independently selected from hydrogen atoms, a C
1
to C
5
alkyl or hydroxyalkyl group, or R
1
and R
2
together with the nitrogen atom to which they are attached form a 5 or 6 member cyclic ring optionally containing one or more additional atoms selected from O, N or S atoms, and n is equal to 1 or 2, with the proviso that when n is equal to 2 only one of R
1
and R
2
may be hydrogen. |
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