Novel optically active benzene derivatives, process for producing the same and liquid-crystalline composition containing said derivatives as liquid-crystalline compound and light switching elements
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0360622A2
公开(公告)日:1990-03-28
Disclosed are herein optically active benzene derivatives represented by the formula (I):
(wherein R1 represents an alkyl group having 3 to 20 carbon atoms; Y represents -0-, -COO- or -OCO-; m, p and s each represents a number of 0 or 1; Ar represents
provided that when p is 1 Ar represents
when p is 0 Ar represents
X represents -COO- or -OCO-; Z represents
wherein q represents a number of 1 to 5, t represents a number of 0 to 5, ℓ represents a number of 1 or 2, u represents a number of 0 or 1 and indicates asymmetric carbon atom; provided that when Ar represents
Z represents
when P is 0 Z represents
with the proviso that when t is 0 Ar represents
R2 represents an alkyl or alkoxyalkyl group having 1 to 20 carbon atoms optionally substituted by halogen atoms; provided that when u is 0, R2 represents an optically active alkyl or alkoxyalkyi group having 1 to 20 carbon atoms optionally substituted by halogen atoms), preparation processes therefor, liquid crystal composition containing such benzene derivatives as liquid-crystalline compound, and a light switching element using said liquid crystal composition as liquid crystal element.
本文公开了由式(I)代表的光学活性苯衍生物:
(其中 R1 代表具有 3 至 20 个碳原子的烷基;Y 代表 -0-、-COO- 或 -OCO-;m、p 和 s 各代表 0 或 1;Ar 代表
但当 p 为 1 时,Ar 代表
当 p 为 0 时,Ar 代表
X 代表-COO-或-OCO-; Z 代表
其中 q 代表 1 至 5 的数字,t 代表 0 至 5 的数字,ℓ 代表 1 或 2 的数字,u 代表 0 或 1 的数字,并表示不对称碳原子;条件是当 Ar 代表
Z 代表
当 P 为 0 时,Z 代表
但当 t 为 0 时,Ar 代表
R2 代表具有 1 至 20 个碳原子、可任选被卤素原子取代的烷基或烷氧基烷基;但当 u 为 0 时,R2 代表具有 1 至 20 个碳原子、可任选被卤素原子取代的光学活性烷基或烷氧基烷基)、其制备工艺、含有此类苯衍生物作为液晶化合物的液晶组合物,以及使用所述液晶组合物作为液晶元件的光开关元件。