Bis-pyrazole aza compounds, processes for making them, and hair

Details Bis-pyrazole aza compounds, processes for making them, and hair Bis-pyrazole aza compounds, processes for making them, and hair

1998-06-24

1999-02-02

Stockton, Laura L.

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8405, 8407, 8639, 8643, 5483651, A61K 713, C07D40312

Patent

active

058658556

ABSTRACT:
The new bis-pyrazole aza compounds have the formula (I): ##STR1## wherein R.sub.1, R.sub.1 ', R.sub.2, R.sub.2 ', R.sub.3 and R.sub.3 ' are the same or different, and are each, independently of each other, H, a straight, branched or cyclic alkyl group having 1 to 6 carbon atoms, a straight chain or branched monohydroxyalkyl group or polyhydroxyalkyl group with 1 to 6 carbon atoms, a straight or branched alkoxyalkyl group with 2 to 6 carbon atoms, a straight or branched monoaminoalkyl group or polyaminoalkyl group with 2 to 6 carbon atoms, or an unsubstituted aromatic or heteroaromatic ring, or a substituted aromatic or heteroaromatic ring having one or more halogen, a C.sub.1 - to C.sub.4 -alkyl group, a nitro group, a sulfonic acid group, a carboxylic acid group or a C.sub.1 - to C.sub.4 -alkoxy substituent, or an unsubstituted benzyl group, or a benzyl group substituted with one or more halogen atom, a hydroxy group, a C.sub.1 - to C.sub.4 - alkyl group, a nitro group or a C.sub.1 - to C.sub.4 -alkyoxy group, or R.sub.1 together with R.sub.2 and/or R.sub.1 ' together with R.sub.2 ' represent a C.sub.3 -diradical bridge. Hair dye compositions containing these new dye compounds and methods of making them are also disclosed.

REFERENCES:
Lieblings Annalen Der Chemie 717, pp. 118-123 By H. Dorn and H. Dilcher, 1968.
Synthesis 1984, 148-149 By P. G. Baraldi et al.

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