申请人:Sumitomo Chemical Company, Limited
公开号:US05422038A1
公开(公告)日:1995-06-06
Optically active naphthalene derivatives including optically active naphthylcarboxylic acid derivative, hydroxynaphthalene derivative, alkoxynaphthylalkanol derivative and alkylnaphthylalkanol derivative have the following structural formula: ##STR1## wherein R.sup.1 denotes an alkyl group of 3-20 carbon atoms, R.sup.2 denotes an alkyl group of 1-20 carbon atoms optionally substituted with halogen atom(s) or an alkoxyalkyl group of 2-20 carbon atoms optionally substituted with halogen atom(s), X denotes --COO-- or --OCO--, k, l and m denotes 0 or 1 respectively, n denotes an integer of 0-6, p denotes 0 or 1, and the asterisk indicates an asymmetric carbon atom, with the proviso that when k is 0, l and m are not 1 at the same time, and when k is 1, m is 1, and when n is 0 and m is 1, X is --COO--. These optically active naphthalene derivatives are useful as a ferroelectric liquid crystal materials or its component having a sufficient spontaneous polarization and by which a high speed response is possible and which further exhibits a ferroelectric liquid crystal phase in a temperature region around room temperature. Processes for the preparation of the optically active derivatives are also disclosed.
具有以下结构式的光学活性萘衍生物包括光学活性萘基羧酸衍生物、羟基萘衍生物、烷氧基萘基醇衍生物和烷基萘基醇衍生物:其中R.sup.1表示3-20个碳原子的烷基基团,R.sup.2表示1-20个碳原子的烷基基团,可选地取代卤原子或2-20个碳原子的烷氧基烷基基团,可选地取代卤原子,X表示--COO--或--OCO--,k、l和m分别表示0或1,n表示0-6的整数,p表示0或1,星号表示不对称碳原子,条件是当k为0时,l和m不能同时为1,当k为1时,m为1,当n为0且m为1时,X为--COO--。这些光学活性萘衍生物可用作具有足够自发极化的铁电液晶材料或其组分,从而可能实现高速响应,并且在接近室温的温度区域内显示铁电液晶相。还公开了制备这些光学活性衍生物的方法。