3-amino-4-nitrophenols, the process for preparation thereof and

Details 3-amino-4-nitrophenols, the process for preparation thereof and 3-amino-4-nitrophenols, the process for preparation thereof and

1986-04-11

1988-04-26

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

8414, C07C 8760, A61K 713

Patent

active

047406224

ABSTRACT:
New 3-amino-4-nitrophenols, the process for preparation thereof and their use in dyeing keratinous fibres, and new intermediate 4,5-dinitrophenols.
The present invention relates to a 3-amino-4-nitrophenol of formula: ##STR1## where Z denotes --CH.sub.2 --W, W denoting hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl, (C.sub.1 -C.sub.3)alkoxy(C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.3)hydroxyalkoxy(C.sub.1 -C.sub.6)alkyl and R denotes hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl or (C.sub.1 -C.sub.3)alkoxy(C.sub.1 -C.sub.6)alkyl, the process for preparation thereof and the intermediate compound of formula: ##STR2## in which Z' denotes CH.sub.2 --W, W denoting C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl, (C.sub.1 -C.sub.3)alkoxy-(C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.3)hydroxyalcoxy(C.sub.1 -C.sub.6)alkyl.
The dyes (I) are useful in direct dyeing of keratinous fibres, in particular human hair.

REFERENCES:
patent: 4125601 (1978-11-01), Bugaut et al.
patent: 4417896 (1983-11-01), Bugaut et al.
patent: 4511360 (1985-04-01), Monnais et al.

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