发明授权
- 专利标题: Benzene derivatives and a liquid-crystalline medium
- 专利标题(中): 苯衍生物和液晶介质
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申请号: US765775申请日: 1991-09-26
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公开(公告)号: US5213710A公开(公告)日: 1993-05-25
- 发明人: Volker Reiffenrath , Reinhard Hittich , Herbert Plach
- 申请人: Volker Reiffenrath , Reinhard Hittich , Herbert Plach
- 申请人地址: DEX Darmstadt
- 专利权人: Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人: Merck Patent Gesellschaft mit beschrankter Haftung
- 当前专利权人地址: DEX Darmstadt
- 优先权: DEX4030392 19900926; DEX4106344 19910228; DEX4111765 19910411
- 主分类号: C07C25/13
- IPC分类号: C07C25/13 ; C07C25/18 ; C07C43/174 ; C07C43/176 ; C07C43/178 ; C07C43/21 ; C09K19/30
摘要:
The invention relates to novel benzene derivatives of the formula I ##STR1## in which n is 0, 1, 2, 3, 4, 5, 6 or 7,Q is --O--, --CH.dbd.CH-- or a single bond,r is 0, 1, 2, 3, 4 or 5,s is 0, 1 or 2,X is F, Cl, OCHF.sub.2 or CF.sub.3,L is H or F, andA is ##STR2## Z, Z-Ar, Ar-Z, Z-Cyc in which Z is a single bond, --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.4 --, Ar is 1,4-phenylene or biphenyl-4,4'-diyl and Cyc is trans-1,4-cyclohexylene.
公开/授权文献
- US5809690A Tubular plant guard with releasable fastener strip 公开/授权日:1998-09-22
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