Liquid crystal compound

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters

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C07C 6976

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active

060020423

ABSTRACT:
A liquid crystal compound represented by the following general formula (1): ##STR1## wherein R is a linear alkyl group having 6 to 12 carbon atoms, X and Y are both a hydrogen atom, or one of them is a hydrogen atom and the other is a fluorine atom, m is an integer of 0 to 5, n is an integer of 1 to 5, and C* is an asymmetric carbon atom. Since the liquid crystal compounds of the present invention have an anti-ferroelectric phase or a ferrielectric phase and the anti-ferroelectric phase or a ferrielectric phase has a highly practical phase sequence and wide temperature range, they are of great industrial value.

REFERENCES:
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A.D.L. Chandani, et al., "Novel Phases Exhibiting Tristable Switching", Japan Journal of Appl. Physics, 28(7), L1261-L1264 (Jul. 1989).
A.D.L. Chandani, et al., "Antiferroelectric Chiral Smectic Phases Responsible for the Tristable Switching in MHPOBC", Japan Journal of Appl. Physics, 28(7), L1265-L1268 (Jul. 1989).
M. Johno, et al. "Smectic Layer Switching by an Electric Field in Ferroelectric Liquid Crystal Cells", Jap. Jour. Appl. Phys. 28(1), L119-L120 (Jan. 1989).
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C.J. Booth, et al, "The Ferro-, Ferri-and Antiferro-electric Properties of a Series of Novel 2-or 3-Substituted-Alkyl 4-(4'-dodecyloxybiphenyl-4-carbonyloxy)-Benzoate Esters", Liquid Crystals, 1996, vol. 20, No. 6, pp. 815-823.
K. Mikami, et al, "Diastereotropic Phenomena for the Appearance of SmCA* Phase in .alpha.-Trifluoromethyl-.beta.-Methyl-Substituted Liquid Crystalline Molecules", Chemistry Letters 1996, pp. 861-862.
K. Mikami, et al, "Binaphthol-Titanium Complex-Catalyzed Fluoral-Ene Reaction with Vinyl Sulfides for Asymmetric Synthesis of Diastereomeric .alpha.-Trifluoromethyl-.beta.-Methyl Carbinols: Diastereomer Switch of Anti-ferroelectric or Ferroelectric Properties of Diastereomeric Liquid-Crystalline Systems", Synlett, Sep. 1996, pp. 837-838.

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