Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Reexamination Certificate
2006-08-15
2006-08-15
Powers, Fiona T. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C546S211000, C548S215000, C548S312400, C548S364100, C548S365700, C548S371700, C548S372500, C008S409000, C008S423000
Reexamination Certificate
active
07091350
ABSTRACT:
The invention relates to diaminopyrazole derivatives having the following structure (I), wherein R1represents an alkyl or alkenyl radical bearing at least one substituent selected from among OR, NRR′, SR, SOR, SO2R, COOR, CONRR′, PO(OH)2, SO3X, NHCONRR, a non-cationic heterocycle, an aryl, a halogen. R2and R3are different from H and represent, independently of each other, an alkyl or alkenyl group; R2and R3, together with the nitrogen atom to which they are attached, can form a heterocycle possibly comprising at least one other heteroatom selected from among N, O and S; R2and R3or the heterocycle that they form with the nitrogen to which they are attached can be substituted by at least one substituent defined above. The identical or different R, R′ groups are selected from a hydrogen atom, an alkyl or alkenyl group; R and R′, together with the nitrogen atom to which they are attached, can form a heterocycle having at least 4 ring members that can contain at least one additional heteroatom selected from among O, N and S. X represents a hydrogen, an alkaline-earth or alkali metal atom or an ammonium group. The invention also relates to the dyeing compositions and the dyeing methods using same
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English language Derwent Abstract of DE 196 46 609, May 14, 1998.
Fessmann Thilo
Terranova Eric
"L'Oreal"
Powers Fiona T.
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