Pyrimidine n-oxide compounds for stimulating the growth of keratin fibers and/or reducing loss thereof
申请人:Dalko Maria
公开号:US20050130991A1
公开(公告)日:2005-06-16
Novel pyrimidine N-oxide compounds and salts thereof, well suited for stimulating the growth of keratin fibers (e.g., the hair or the eyelashes) and/or limiting the loss thereof and/or increasing their density, have the formula (A):
in which n is an integer ranging from 2 to 12; R
1
is a linear or branched, saturated or unsaturated alkyl radical, optionally substituted with a group —OR′, —NR′R″ or —COOR′, R
1
having from 1 to 20 carbon atoms, or is NR′R″; R
2
is hydrogen, —NR
3
R
4
, —OR
3
, or —SR
3
, wherein R
3
and R
4
, which may be identical or different, are each a linear or branched, saturated or unsaturated alkyl radical, optionally substituted with a group —OR′, —NR′R″ or —COOR′, R
2
having from 1 to 20 carbon atoms, with the proviso that R
3
and R
4
may form part of a saturated or unsaturated ring member of 4 to 7 atoms, optionally containing at least one hetero atom; and R′ and R″, which may be identical or different, are each hydrogen or a saturated, linear or branched C
1
-C
3
alkyl radical.
新型嘧啶N-氧化物化合物及其盐,非常适合促进角蛋白纤维(如头发或睫毛)的生长和/或限制其脱落和/或增加其密度,其化学式为(A):其中n是一个范围从2到12的整数;R1是线性或支链的、饱和或不饱和的烷基基团,可选地被取代为基团—OR′、—NR′R″或—COOR′,R1含有1至20个碳原子,或为NR′R″;R2是氢、—NR3R4、—OR3或—SR3,其中R3和R4,可能相同也可能不同,各自是线性或支链的、饱和或不饱和的烷基基团,可选地被取代为基团—OR′、—NR′R″或—COOR′,R2含有1至20个碳原子,但R3和R4可能是4至7个原子的饱和或不饱和环的一部分,可选地含有至少一个杂原子;R′和R″,可能相同也可能不同,各自是氢或饱和的、线性或支链的C1-C3烷基基团。