Use of 4-nitro-2,1,3,-benzoxadiazole derivatives as dyes in colouring agents for keratin fibres
申请人:——
公开号:US20020189032A1
公开(公告)日:2002-12-19
The object of the present invention is the use of 4-nitro-2,1,3-benzoxadiazole derivatives of general formula (I) as dye in colorants for keratin fibers such as, for example, wool, silk, furs or hair and particularly human hair
1
In formula (I)
X denotes oxygen, sulfur or NR
a
, R
a
standing for hydrogen, a (C
1
-C
4
)-alkyl group, a monohydroxy-(C
1
-C
4
)-alkyl group, a polyhydroxy-(C
2
-C
4
)-alkyl group or a mono-(C
1
C
4
)-alkoxy-(C
1
-C
4
)-alkyl group,
R1 and R2 can be equal or different and independently of each other denote hydrogen, a halogen atom, a (C
1
-C
4
)-alkyl group, a halogen-substituted (C
1
-C
4
)-alkyl group, a (C
1
-C
4
)-alkoxy group, a nitro group or an NR
b
R
c
group, the R
b
and R
c
groups being equal or different and independently of each other denoting hydrogen, a (C
1
-C
4
)-alkyl group, an optionally substituted aromatic carbon ring or a (C
1
-C
4
)-alkanecarbonyl group, or R
b
and R
c
together with the nitrogen atom forming a heterocyclic (C
3
-C
6
) group, and
Q denotes hydrogen, an aliphatic group, an aromatic isocyclic group or an aromatic heterocyclic group.
本发明的对象是将一般式(I)的4-硝基-2,1,3-苯并噁二唑衍生物用作角蛋白纤维的染料,例如羊毛、丝绸、毛皮或头发,特别是人类头发。在式(I)中,X代表氧、硫或NRa,Ra代表氢、(C1-C4)烷基、一元羟基-(C1-C4)烷基、多元羟基-(C2-C4)烷基或一元-(C1-C4)氧基-(C1-C4)烷基,R1和R2可以相等也可以不同,并且独立地表示氢、卤素原子、(C1-C4)烷基、卤素取代的(C1-C4)烷基、(C1-C4)氧基、硝基或NRbRc基团,其中Rb和Rc基团可以相等也可以不同,并且独立地表示氢、(C1-C4)烷基、可选择取代的芳香碳环或(C1-C4)烷基羰基基团,或者Rb和Rc与氮原子一起形成杂环(C3-C6)基团,Q代表氢、脂肪基、芳香异环基团或芳香杂环基团。