申请人:Baschong Werner
公开号:US20080279794A1
公开(公告)日:2008-11-13
The use of
(a) hydroxydiphenyl ether compounds of formula
wherein
R
1
, R
2
and R
3
are each independently of the others hydrogen; hydroxy; C
1
-C
20
alkyl; hydroxy-substituted C
1
-C
20
alkyl; C
5
-C
7
cycloalkyl; C
1
-C
20
alkoxy; C
1
-C
6
alkylcarbonyl; phenyl; or phenyl-C
1
-C
3
alkyl;
R
4
is hydrogen, C
1
-C
20
alkyl; hydroxy-substituted C
1
-C
20
alkyl; C
5
-C
7
cycloalkyl; hydroxy; formyl; acetonyl; allyl; carboxy; carboxy-C
1
-C
3
alkyl; carboxyallyl; C
2
-C
20
alkenyl; C
1
-C
6
alkylcarbonyl; C
1
-C
3
alkylcarbonyl-C
1
-C
3
alkyl; phenyl; or phenyl-C
1
-C
3
alkyl; and
R
5
is hydrogen; C
1
-C
20
alkoxy; or C
1
-C
6
alkylcarbonyl;
as melanogenesis inhibitors and for lightening the skin.