Title:
2,3-DIFLUOROPHENYL DERIVATIVES HAVING NEGATIVE VALUE OF PERMITTIVITY ANISOTROPY, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/1999/021815
Kind Code:
A1
Abstract:
Liquid-crystalline compounds having a large negative value of permittivity anisotropy and a small value of optical anisotropy; a liquid-crystal composition containing the same; and a liquid-crystal display element formed from the liquid-crystal composition. The compounds are novel 2,3-difluorophenyl derivatives represented by general formula (1) having a 2,3-difluorophenyl moiety and the liquid-crystal composition contains any of the compounds, while the liquid-crystal display element is formed from this liquid-crystal composition: wherein Ra and Rb each represents C¿1-10? alkyl or alkoxy, provided that in at least either, any at least one methylene group has been replaced with cyclopropane-1,2-diyl, -CF¿2?-, or -CFH-; rings A¿1? to A¿4? each represents cyclohexane-1,4-diyl or 1,4-phenylene, provided that at least either of rings A¿3? and A¿4? is 2,3-difluoro-1,4-phenylene; Z¿1?, Z¿2?, and Z¿3? each represents a single bond, -(CH¿2?)¿p?-, -CO¿2?-, -CF¿2?O-, or -CH¿2?O-; p is an integer of 2 to 4; and m and n each is 0 or 1.
Inventors:
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
YAGI HIROO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
TAKEUCHI HIROYUKI (JP)
YAGI HIROO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
Application Number:
PCT/JP1998/004833
Publication Date:
May 06, 1999
Filing Date:
October 26, 1998
Export Citation:
Assignee:
CHISSO CORP (JP)
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
YAGI HIROO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
YAGI HIROO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
International Classes:
C07C25/18; C07D241/12; C07D319/06; C09K19/04; C09K19/30; C09K19/34; C09K19/42; C09K19/44; C09K19/46; (IPC1-7): C07C43/225; C07C25/18; C07C69/74; C07C69/76; C07D309/06; C07D319/06; C09K19/10; C09K19/20; C09K19/30; C09K19/34; C09K19/42; G02F1/13
Foreign References:
| JPH08165258A | 1996-06-25 | |||
| JPH07267885A | 1995-10-17 | |||
| JPH0797354A | 1995-04-11 | |||
| JPH0892137A | 1996-04-09 | |||
| JPH0881417A | 1996-03-26 | |||
| JPH02115145A | 1990-04-27 | |||
| JPH02503435A | 1990-10-18 | |||
| JPH04501864A | 1992-04-02 |
Attorney, Agent or Firm:
Kawakita, Takenaga (Nihonbashi-kayabacho 2-chome Chuo-ku Tokyo, JP)
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