2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their

Details 2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their 2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their

1988-02-08

1989-08-15

Hollrah, Glennon H.

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8409, 8410, 8411, 8412, 549491, A61K 713, C07D30504

Patent

active

048570702

ABSTRACT:
The invention relates to new 2,4-diaminophenyl tetrahydrofurfuryl ethers of the general formula VIII and to their salts with inorganic or organic acids ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of one another, each represent a hydrogen atom, a (C.sub.1 -C.sub.4)alkyl group, hydroxy(C.sub.2 -C.sub.4)alkyl group, dihydroxy(C.sub.3 -C.sub.4)alkyl group, halogeno(C.sub.2 -C.sub.4)alkyl group, amino(C.sub.2 -C.sub.4)alkyl group or an amino(C.sub.2 -C.sub.4)alkyl group which is substituted once or twice by methyl, ethyl or hydroxyethyl radicals on the nitrogen, the carbon chain having a straight or branched arrangement, and it being a proviso that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a hydrogen atom, to processes for their preparation, and to aqueous tinting compositions for keratin fibres such as fur and human hair, containing at least one coupler and at least one developing component together with customary additives and auxiliaries, the coupler corresponding to the general formula VIII or to the acid salts of these compounds.

REFERENCES:
patent: 3981677 (1976-09-01), Halasz et al.
patent: 4125367 (1978-11-01), Bugaut et al.
patent: 4420637 (1983-12-01), Bugaut et al.

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