Optically active ester derivatives, preparation process thereof, liquid crystal materials and a light switching element
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0357372A2
公开(公告)日:1990-03-07
Disclosed are herein optically active ester derivatives represented by the formula (I):
(wherein R1 represents an alkyl group having 3 to 20 carbon atoms; R2 represents an optically active alkyl or alkoxyalkyl group having 3 to 15 carbon atoms optionally substituted by halogen atoms; Y represents -O-, -COO- or -OCO-; X represents -COO- or -OCO-; represents a number of 1 or 2; k and m each represents a number of 0 or 1; n represents a numberof 1 to 6), preparation processes therefor, liquid crystal materials containing such easter derivatives as active ingredient, and a light switching element using said liquid crystal materials as liquid crystal element.
本文公开了由式(I)代表的光学活性酯衍生物:
(其中 R1 代表具有 3 至 20 个碳原子的烷基;R2 代表具有 3 至 15 个碳原子的光学活性烷基或烷氧基烷基,可选择被卤素原子取代;Y 代表 -O-、-COO- 或 -OCO-;X 代表 -COO- 或 -OCO-;代表 1 或 2 的数字;k 和 m 分别代表 0 或 1 的数字;n 代表 1 至 6 的数字)、其制备工艺、含有此类酯衍生物作为活性成分的液晶材料,以及使用上述液晶材料作为液晶元件的光开关元件。