3-Amino-5-hydroxypyridine derivatives and hair coloring composit

Details 3-Amino-5-hydroxypyridine derivatives and hair coloring composit 3-Amino-5-hydroxypyridine derivatives and hair coloring composit

1985-11-14

1987-04-28

Jiles, Henry R.

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

546296, 8423, 8406, A61K 3140, C07D21372

Patent

active

046611142

ABSTRACT:
New 3-amino-5-hydroxypyridine derivatives are disclosed, of the formula I ##STR1## wherein R.sup.1 and R.sup.2 are independently CH.sub.3, C.sub.2 H.sub.5 or C.sub.2 H.sub.4 OH, and its physiologically compatible salts, as well as oxidation hair coloring compositions based upon the compounds of general formula I as coupler substance. The oxidation hair coloring compositions based upon the new couplers, of which the 3-amino-5-hydroxy-2,6-dimethoxypyridine is preferred, are particularly suitable in combination with known developer substances to obtaining red, red-brown, bond and orange colored tones. The new coupler substances of formula I prove to have favorable toxicological and dermatological characteristics.

REFERENCES:
patent: 3630847 (1971-12-01), Rey et al.
patent: 4452603 (1984-06-01), Konrad et al.
patent: 4473375 (1984-09-01), Clausen
Colour Index, Third Edition, vol. 4, Published by The Society of Dyers and Colourists, pp. 4053, 4070, 4389, 4534, 4537.
C. D. Johnson et al., J. Chem. Soc. (B), 1967, pp. 1204-1210.
T. Cohen et al., J. Org. Chem. vol. 42, No. 12, (1977), pp. 2053-2058.
Information regarding TA 1535, TA 1537, TA 1538, TA 98 and TA 100 cited on p. 12 of the specification.

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