发明授权
- 专利标题： Optically active aromatic compounds, preparation process therefor, liquid crystal materials and a light switching element
- 专利标题（中）： 光学活性芳香族化合物，其制备方法，液晶材料和光开关元件
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申请号： US123987申请日： 1993-09-21
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公开(公告)号： US5374376A公开(公告)日： 1994-12-20
- 发明人: Takayuki Higashii , Isao Kurimoto , Shoji Toda , Masayoshi Minai , Shigeaki Chika , Koichi Fujisawa , Kiyoshi Imamura
- 申请人： Takayuki Higashii , Isao Kurimoto , Shoji Toda , Masayoshi Minai , Shigeaki Chika , Koichi Fujisawa , Kiyoshi Imamura
- 申请人地址： JPX Osaka
- 专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人地址： JPX Osaka
- 优先权： JPX63-219504 19880831; JPX63-229492 19880912; JPX63-237121 19880920; JPX63-238557 19880921
- 主分类号： C07C69/773
- IPC分类号： C07C69/773 ; C09K19/20 ; C09K19/12 ; C07C69/76
摘要：
Disclosed are herein optically active aromatic compounds represented by the formula (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 carbon atoms unsubstituted or substituted by a halogen atom; R.sub.1 represents an alkyl group having 3 to 20 carbon atoms;Z represents ##STR2## wherein p represents a number of 1 to 5 and * indicates an asymmetric carbon atom; l and k each represents a number of 1 or 2; m and s each represents a number of 0 or 1, which are useful as a liquid crystal.