Compounds and pharmaceutically acceptable salts of the compounds are disclosed, wherein the compounds have the structure of Formula I
as defined herein. Corresponding pharmaceutical compositions, methods of treatment, methods of synthesis, and intermediates are also disclosed.
An object is to provide an external preparation for skin preferably usable to prevent or ameliorate pigmentation. The object is achieved by providing a preventing or ameliorating agent for pigmentation, consisting of a compound represented by the following general formula (1), an isomer thereof, and/or a pharmacologically acceptable salt thereof, and an external preparation for skin containing the same as a component:
[wherein R
1
represents an unsubstituted aromatic group or an aromatic group having any substituent; R
2
represents a hydrogen atom, a linear chain or branched chain alkyl group having a number of carbon atom or atoms of 1 to 4, or an acyl group having a linear or branched alkyl chain having a number of carbon atom or atoms of 1 to 4; and R
3
represents a hydrogen atom or a linear chain or branched chain alkyl group having a number of carbon atom or atoms of 1 to 4.]
A compound having formula (I),
wherein G
1
represents a C
4
-C
22
alkyl or alkenyl group, a C
8
-C
20
aralkyl group or formula (II)
wherein G
3
is a difunctional C
2
-C
18
alkyl or alkenyl group, a difunctional C
6
-C
20
aryl group or G
3
is absent; provided that G
1
is not 2-butyl, n-hexyl, n-octyl, n-dodecyl, n-hexadecyl or 2-phenylethyl.
PROPHYLACTIC OR AMELIORATING AGENT FO PIGMENTATION
申请人:Pola Chemical Industries Inc.
公开号:EP2514402A1
公开(公告)日:2012-10-24
An object is to provide an external preparation for skin preferably usable to prevent or ameliorate pigmentation. The object is achieved by providing a preventing or ameliorating agent for pigmentation, consisting of a compound represented by the following general formula (1), an isomer thereof, and/or a pharmacologically acceptable salt thereof, and an external preparation for skin containing the same as a component:
[wherein R1 represents an unsubstituted aromatic group or an aromatic group having any substituent; R2 represents a hydrogen atom, a linear chain or branched chain alkyl group having a number of carbon atom or atoms of 1 to 4, or an acyl group having a linear or branched alkyl chain having a number of carbon atom or atoms of 1 to 4; and R3 represents a hydrogen atom or a linear chain or branched chain alkyl group having a number of carbon atom or atoms of 1 to 4.]