申请人:Roche Vitamins Inc.
公开号:US06573269B1
公开(公告)日:2003-06-03
The present invention provides compounds of formula I, which are effective in absorbing ultraviolet radiation and can be used as sunscreen agents:
wherein
R1 and R2 are each independently C2-C18 alkyl, C5-C7 cycloalkyl, or C2-C18 alkyl in which at least one methylene group is replaced by oxygen;
R3 is hydrogen, C1-C18 alkyl, C2-C18 alkyl in which at least one methylene group is replaced by oxygen, C1-C18 alkyl carbonyl, C3-C18 alkenyl, C3-C18 alkynyl, or a group YS;
R4 is hydrogen, C1-C8 alkyl or a group OR3;
Y is a linker group; and
S is a silane-, an oligosiloxane- or a polysiloxane-moiety.
本发明提供了式I的化合物,可有效吸收紫外线辐射,并可用作防晒剂:其中R1和R2分别独立地为C2-C18烷基,C5-C7环烷基,或其中至少一个亚甲基团被氧替代的C2-C18烷基;R3为氢,C1-C18烷基,其中至少一个亚甲基团被氧替代的C2-C18烷基,C1-C18烷基羰基,C3-C18烯基,C3-C18炔基,或一个YS基团;R4为氢,C1-C8烷基或一个OR3基团;Y为连接基团;S为硅烷基、寡硅氧烷基或多硅氧烷基。