Optically-active aliphatic .alpha.-halogen substituted carboxyli

Details Optically-active aliphatic .alpha.-halogen substituted carboxyli Optically-active aliphatic .alpha.-halogen substituted carboxyli

1991-04-16

1992-11-24

Ramsuer, Robert W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Esters having the thiocarboxylate group, -cx-, wherein the...

C07C32700

Patent

active

051663910

ABSTRACT:
The present invention provides novel optically-active aliphatic .alpha.-halogen substituted carboxylic acid 4'-(4-alkoxybenzyloxy)biphenyl thioester compounds of the general formula: ##STR1## wherein R represents a n-alkyl radical having C.sub.8 to C.sub.15, carbon atoms, C* represents an asymmetric carbon atom, X represents a halogen atom and R' represents ##STR2## and process for the preparation thereof. The novel biphenyl thioester compounds provided according to the present invention are usable as a dopant or a base material for liquid crystal blending, thereby improving the properties of LCD.

REFERENCES:
patent: 4175134 (1979-11-01), Davis et al.
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Dijon et al., "New Ferroelectric Materials with High Spontaneous Polarization", Ferroelectrics, vol. 85, pp. 441-450 (1988).
Keller, "Synthesis of Stable and Low Melting Ferroelectric Liquid Crystals of the Ester Family", in Ferroelectrics, vol. 58, pp. 3-7 (1984).
Meyer, "Ferroelectric Liquid Crystals; A Review", in Molecular Crystals and Liquid Crystals, pp. 33-48 (1977).
Shivkumar et al., "Chiral Smectic C Phase Exhibited by Some 4-n-Alkoxy-.alpha.-Methyl Cinnamates", in Ferroelectrics, vol. 85, pp. 461-468 (1988).
Yoshino et al., "Novel Dielectric Behavior of Ferroelectric Liquid Crystals and High Field Effects", in IEEE Transactions on Electrical Insulation, vol. 23, No. 4, pp. 639-644, Aug. 1988.

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