Title:
NOVEL LIQUID-CRYSTAL COMPOUNDS HAVING LARGE NEGATIVE VALUE OF PERMITTIVITY ANISOTROPY, LIQUID-CRYSTAL COMPOSITION, AND LIQUID-CRYSTAL DISPLAY ELEMENT
Document Type and Number:
WIPO Patent Application WO/1999/021816
Kind Code:
A1
Abstract:
Liquid-crystal compounds combining an extremely large negative value of permittivity anisotropy with 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 liquid-crystal compounds represented by general formula (1) having a 2,3-difluorophenyl moiety and the liquid-crystal composition contains any of the novel liquid-crystal compounds, while the liquid-crystal display element is formed from this liquid-crystal composition; wherein Ra and Rb each represents linear or branched C¿1-20? alkyl in which any methylene group may have been replaced with -O-, -CH=CH-, or -C$m(Z)C-, provided that each -O- does not neighbor another -O-; ring A¿1? represents cyclohexane-1,4-diyl in which any methylene group may have been replaced with -O-; ring A¿2? represents 2,3-difluoro-1,4-phenylene in which the hydrogen atoms at the 5- and 6-positions each may have been replaced with methyl or a fluorine atom; Z¿1? and Z¿2? each represents a single bond or -CH¿2?CH¿2?-; and Xa, Xb, Xc, and Xd each represents a hydrogen, fluorine, or chlorine atom, provided that at least one of them is a fluorine or chlorine atom.
Inventors:
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
KUBO YASUHIRO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
TAKEUCHI HIROYUKI (JP)
KUBO YASUHIRO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
Application Number:
PCT/JP1998/004834
Publication Date:
May 06, 1999
Filing Date:
October 26, 1998
Export Citation:
Assignee:
CHISSO CORP (JP)
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
KUBO YASUHIRO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
MIYAZAWA KAZUTOSHI (JP)
TAKEUCHI HIROYUKI (JP)
KUBO YASUHIRO (JP)
TAKESHITA FUSAYUKI (JP)
NAKAGAWA ETSUO (JP)
International Classes:
C07C25/18; C07C43/225; C07D239/26; C07D309/06; C07D319/06; C09K19/04; C09K19/30; C09K19/34; C09K19/42; C09K19/44; C09K19/46; (IPC1-7): C07C43/225; C07C25/18; C07D309/06; C07D319/06; C09K19/30; C09K19/34; C09K19/42; G02F1/13
Foreign References:
| JPH06228037A | 1994-08-16 | |||
| GB2249309A | 1992-05-06 |
Other References:
MATHARU A. S., WILSON R. C., BYRON D. J.: "THE SYNTHESIS AND COMPARISON OF THE LIQUID CRYSTALLINE PROPERTIES OF CERTAIN 1-(4'N-ALKOXYPOLYFLUOROBIPHENYL-4-YL)-2-(TRANS-4-N-PENTYLCYCLOHEXYL)-ETHENES AND -ETHANES CARRYING FOUR, SIX OR EIGHT FLUORO-SUBSTITUENTS.", LIQUID CRYSTALS, TAYLOR & FRANCIS, vol. 23., no. 04., 1 January 1997 (1997-01-01), pages 575 - 588., XP002918599, ISSN: 0267-8292, DOI: 10.1080/026782997208181
BYRON D. J., MATHARU A. S., WILSON R. C.: "THE SYNTHESIS AND LIQUID CRYSTAL PROPERTIES OF CERTAIN 1-(4'-N-ALKOXY-2,2',3,3',5,5',6,6'-OCTAFLUOROBIPHENYL-4-YL)- 2-(TRANS-4-N-PENTYLCYCLOHEXYL)-ETHANES AND -ETHENES.", LIQUID CRYSTALS, TAYLOR & FRANCIS, vol. 19., no. 01., 1 July 1995 (1995-07-01), pages 39 - 45., XP000536256, ISSN: 0267-8292
See also references of EP 1026143A4
BYRON D. J., MATHARU A. S., WILSON R. C.: "THE SYNTHESIS AND LIQUID CRYSTAL PROPERTIES OF CERTAIN 1-(4'-N-ALKOXY-2,2',3,3',5,5',6,6'-OCTAFLUOROBIPHENYL-4-YL)- 2-(TRANS-4-N-PENTYLCYCLOHEXYL)-ETHANES AND -ETHENES.", LIQUID CRYSTALS, TAYLOR & FRANCIS, vol. 19., no. 01., 1 July 1995 (1995-07-01), pages 39 - 45., XP000536256, ISSN: 0267-8292
See also references of EP 1026143A4
Attorney, Agent or Firm:
Kawakita, Takenaga (Nihonbashi-kayabacho 2-chome Chuo-ku Tokyo, JP)
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