Optically active aromatic compounds, preparation p

专利名称：Optically active aromatic compounds,

preparation process therefor, liquid crystalmaterials and a light switching element

发明人：Takayuki Higashii,Isao Kurimoto,Shoji

Toda,Masayoshi Minai,Shigeaki Chika,KoichiFujisawa,Kiyoshi Imamura

申请号：US08/123987申请日：19930921公开号：US05374376A公开日：19941220

摘要：Disclosed are herein optically active aromatic compounds represented by theformula (I): ##STR1## wherein X represents --COO-- or - -OCO--; Y represents --COO--, --OCO-- or --O--; R.sub.2 represents an alkyl or alkoxyalkyl group having 1 to 20 carbonatoms unsubstituted or substituted by a halogen atom; R.sub.1 represents an alkyl grouphaving 3 to 20 carbon atoms;

Z represents ##STR2## wherein p represents a number of 1 to 5 and * indicates anasymmetric carbon atom; l and k each represents a number of 1 or 2; m and s eachrepresents a number of 0 or 1, which are useful as a liquid crystal.

申请人：SUMITOMO CHEMICAL COMPANY, LIMITED

代理机构：Stevens, Davis, Miller & Mosher

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